Merge remote-tracking branch 'origin/master' into stable (0.2.3)

pull/862/head v0.2.3
David Wilson 7 years ago
commit 5667116f58

1
.gitignore vendored

@ -8,6 +8,7 @@
MANIFEST
build/
dist/
docs/_build/
htmlcov/
*.egg-info
__pycache__/

@ -17,11 +17,21 @@ install:
- pip install -r dev_requirements.txt
script:
- ${TRAVIS_BUILD_DIR}/.travis/${MODE}_tests.sh
- |
if [ -f "${TRAVIS_BUILD_DIR}/.travis/${MODE}_tests.sh" ]; then
${TRAVIS_BUILD_DIR}/.travis/${MODE}_tests.sh;
else
${TRAVIS_BUILD_DIR}/.travis/${MODE}_tests.py;
fi
services:
- docker
# To avoid matrix explosion, just test against oldest->newest and
# newest->oldest in various configuartions.
matrix:
include:
# Mitogen tests.
@ -34,85 +44,32 @@ matrix:
# 2.6 -> 2.7
- python: "2.6"
env: MODE=mitogen DISTRO=centos7
# 2.6 -> 2.6
- python: "2.6"
env: MODE=mitogen DISTRO=centos6
# 3.6 -> 2.7
# 3.6 -> 2.6
- python: "3.6"
env: MODE=mitogen DISTRO=debian
env: MODE=mitogen DISTRO=centos6
# Debops tests.
# 2.4.3.0; 2.7 -> 2.7
- python: "2.7"
env: MODE=debops_common VER=2.4.3.0
# 2.5.5; 2.7 -> 2.7
# 2.4.6.0; 2.7 -> 2.7
- python: "2.7"
env: MODE=debops_common VER=2.6.1
# 2.5.5; 3.6 -> 2.7
env: MODE=debops_common VER=2.4.6.0
# 2.5.7; 3.6 -> 2.7
- python: "3.6"
env: MODE=debops_common VER=2.6.1
env: MODE=debops_common VER=2.6.2
# ansible_mitogen tests.
# 2.4.3.0; Debian; 2.7 -> 2.7
- python: "2.7"
env: MODE=ansible VER=2.4.3.0 DISTRO=debian
# 2.5.5; Debian; 2.7 -> 2.7
- python: "2.7"
env: MODE=ansible VER=2.5.5 DISTRO=debian
# 2.6.0; Debian; 2.7 -> 2.7
- python: "2.7"
env: MODE=ansible VER=2.6.0 DISTRO=debian
# 2.6.1; Debian; 2.7 -> 2.7
- python: "2.7"
env: MODE=ansible VER=2.6.1 DISTRO=debian
# Centos 7 Python2
# Latest
# 2.6 -> {debian, centos6, centos7}
- python: "2.6"
env: MODE=ansible VER=2.6.1 DISTRO=centos7
# Backward Compatiability
- python: "2.7"
env: MODE=ansible VER=2.5.5 DISTRO=centos7
- python: "2.7"
env: MODE=ansible VER=2.6.0 DISTRO=centos7
- python: "2.7"
env: MODE=ansible VER=2.6.1 DISTRO=centos7
# Centos 7 Python3
- python: "3.6"
env: MODE=ansible VER=2.5.5 DISTRO=centos7
- python: "3.6"
env: MODE=ansible VER=2.6.0 DISTRO=centos7
- python: "3.6"
env: MODE=ansible VER=2.6.1 DISTRO=centos7
# Centos 6 Python2
# Latest
- python: "2.6"
env: MODE=ansible VER=2.6.1 DISTRO=centos6
# Backward Compatiability
env: MODE=ansible VER=2.4.6.0
- python: "2.6"
env: MODE=ansible VER=2.5.5 DISTRO=centos6
- python: "2.6"
env: MODE=ansible VER=2.6.0 DISTRO=centos6
- python: "2.7"
env: MODE=ansible VER=2.6.1 DISTRO=centos6
env: MODE=ansible VER=2.6.2
# Centos 6 Python3
# 3.6 -> {debian, centos6, centos7}
- python: "3.6"
env: MODE=ansible VER=2.5.5 DISTRO=centos6
env: MODE=ansible VER=2.4.6.0
- python: "3.6"
env: MODE=ansible VER=2.6.0 DISTRO=centos6
- python: "3.6"
env: MODE=ansible VER=2.6.1 DISTRO=centos6
env: MODE=ansible VER=2.6.2
# Sanity check our tests against vanilla Ansible, they should pass.
- python: "2.7"
env: MODE=ansible VER=2.5.5 DISTRO=debian STRATEGY=linear
# Sanity check against vanilla Ansible. One job suffices.
- python: "2.7"
env: MODE=ansible VER=2.6.0 DISTRO=debian STRATEGY=linear
- python: "2.7"
env: MODE=ansible VER=2.6.1 DISTRO=debian STRATEGY=linear
env: MODE=ansible VER=2.6.2 DISTROS=debian STRATEGY=linear

@ -0,0 +1,66 @@
#!/usr/bin/env python
# Run tests/ansible/all.yml under Ansible and Ansible-Mitogen
import os
import sys
import ci_lib
from ci_lib import run
BASE_PORT = 2201
TESTS_DIR = os.path.join(ci_lib.GIT_ROOT, 'tests/ansible')
HOSTS_DIR = os.path.join(ci_lib.TMP, 'hosts')
with ci_lib.Fold('docker_setup'):
for i, distro in enumerate(ci_lib.DISTROS):
try:
run("docker rm -f target-%s", distro)
except: pass
run("""
docker run
--rm
--detach
--publish 0.0.0.0:%s:22/tcp
--hostname=target-%s
--name=target-%s
mitogen/%s-test
""", BASE_PORT + i, distro, distro, distro)
with ci_lib.Fold('job_setup'):
os.chdir(TESTS_DIR)
os.chmod('../data/docker/mitogen__has_sudo_pubkey.key', int('0600', 7))
# Don't set -U as that will upgrade Paramiko to a non-2.6 compatible version.
run("pip install -q ansible==%s", ci_lib.ANSIBLE_VERSION)
run("mkdir %s", HOSTS_DIR)
run("ln -s %s/hosts/common-hosts %s", TESTS_DIR, HOSTS_DIR)
with open(os.path.join(HOSTS_DIR, 'target'), 'w') as fp:
fp.write('[test-targets]\n')
for i, distro in enumerate(ci_lib.DISTROS):
fp.write("target-%s "
"ansible_host=%s "
"ansible_port=%s "
"ansible_user=mitogen__has_sudo_nopw "
"ansible_password=has_sudo_nopw_password"
"\n" % (
distro,
ci_lib.DOCKER_HOSTNAME,
BASE_PORT + i,
))
# Build the binaries.
# run("make -C %s", TESTS_DIR)
if not ci_lib.exists_in_path('sshpass'):
run("sudo apt-get update")
run("sudo apt-get install -y sshpass")
with ci_lib.Fold('ansible'):
run('/usr/bin/time ./run_ansible_playbook.sh all.yml -i "%s" %s',
HOSTS_DIR, ' '.join(sys.argv[1:]))

@ -1,64 +0,0 @@
#!/bin/bash -ex
# Run tests/ansible/all.yml under Ansible and Ansible-Mitogen
TRAVIS_BUILD_DIR="${TRAVIS_BUILD_DIR:-`pwd`}"
TMPDIR="/tmp/ansible-tests-$$"
ANSIBLE_VERSION="${VER:-2.6.1}"
export ANSIBLE_STRATEGY="${STRATEGY:-mitogen_linear}"
DISTRO="${DISTRO:-debian}"
export PYTHONPATH="${PYTHONPATH}:${TRAVIS_BUILD_DIR}"
# SSH passes these through to the container when run interactively, causing
# stdout to get messed up with libc warnings.
unset LANG LC_ALL
function on_exit()
{
rm -rf "$TMPDIR"
docker kill target || true
}
trap on_exit EXIT
mkdir "$TMPDIR"
echo travis_fold:start:docker_setup
DOCKER_HOSTNAME="$(python ${TRAVIS_BUILD_DIR}/tests/show_docker_hostname.py)"
docker run \
--rm \
--detach \
--publish 0.0.0.0:2201:22/tcp \
--name=target \
mitogen/${DISTRO}-test
echo travis_fold:end:docker_setup
echo travis_fold:start:job_setup
pip install ansible=="${ANSIBLE_VERSION}"
cd ${TRAVIS_BUILD_DIR}/tests/ansible
chmod go= ${TRAVIS_BUILD_DIR}/tests/data/docker/mitogen__has_sudo_pubkey.key
echo '[test-targets]' > ${TMPDIR}/hosts
echo \
target \
ansible_host=$DOCKER_HOSTNAME \
ansible_port=2201 \
ansible_user=mitogen__has_sudo_nopw \
ansible_password=has_sudo_nopw_password \
>> ${TMPDIR}/hosts
# Build the binaries.
make -C ${TRAVIS_BUILD_DIR}/tests/ansible
[ ! "$(type -p sshpass)" ] && sudo apt install -y sshpass
echo travis_fold:end:job_setup
echo travis_fold:start:ansible
/usr/bin/time ./run_ansible_playbook.sh \
all.yml \
-i "${TMPDIR}/hosts"
echo travis_fold:end:ansible

@ -0,0 +1,102 @@
from __future__ import absolute_import
from __future__ import print_function
import atexit
import os
import subprocess
import sys
import shlex
import shutil
import tempfile
import os
os.system('curl -H Metadata-Flavor:Google http://metadata.google.internal/computeMetadata/v1/instance/machine-type')
#
# check_output() monkeypatch cutpasted from testlib.py
#
def subprocess__check_output(*popenargs, **kwargs):
# Missing from 2.6.
process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)
output, _ = process.communicate()
retcode = process.poll()
if retcode:
cmd = kwargs.get("args")
if cmd is None:
cmd = popenargs[0]
raise subprocess.CalledProcessError(retcode, cmd)
return output
if not hasattr(subprocess, 'check_output'):
subprocess.check_output = subprocess__check_output
# -----------------
def _argv(s, *args):
if args:
s %= args
return shlex.split(s)
def run(s, *args, **kwargs):
argv = _argv(s, *args)
print('Running: %s' % (argv,))
return subprocess.check_call(argv, **kwargs)
def get_output(s, *args, **kwargs):
argv = _argv(s, *args)
print('Running: %s' % (argv,))
return subprocess.check_output(argv, **kwargs)
def exists_in_path(progname):
return any(os.path.exists(os.path.join(dirname, progname))
for dirname in os.environ['PATH'].split(os.pathsep))
class TempDir(object):
def __init__(self):
self.path = tempfile.mkdtemp(prefix='mitogen_ci_lib')
atexit.register(self.destroy)
def destroy(self, rmtree=shutil.rmtree):
rmtree(self.path)
class Fold(object):
def __init__(self, name):
self.name = name
def __enter__(self):
print('travis_fold:start:%s' % (self.name))
def __exit__(self, _1, _2, _3):
print('')
print('travis_fold:end:%s' % (self.name))
os.environ.setdefault('ANSIBLE_STRATEGY',
os.environ.get('STRATEGY', 'mitogen_linear'))
ANSIBLE_VERSION = os.environ.get('VER', '2.6.2')
GIT_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
DISTROS = os.environ.get('DISTROS', 'debian centos6 centos7').split()
TMP = TempDir().path
os.environ['PYTHONDONTWRITEBYTECODE'] = 'x'
os.environ['PYTHONPATH'] = '%s:%s' % (
os.environ.get('PYTHONPATH', ''),
GIT_ROOT
)
DOCKER_HOSTNAME = subprocess.check_output([
sys.executable,
os.path.join(GIT_ROOT, 'tests/show_docker_hostname.py'),
]).decode().strip()
# SSH passes these through to the container when run interactively, causing
# stdout to get messed up with libc warnings.
os.environ.pop('LANG', None)
os.environ.pop('LC_ALL', None)

@ -31,7 +31,7 @@ from __future__ import unicode_literals
import logging
import os
import shlex
import random
import stat
import time
@ -53,7 +53,28 @@ import ansible_mitogen.target
LOG = logging.getLogger(__name__)
def optional_secret(value):
"""
Wrap `value` in :class:`mitogen.core.Secret` if it is not :data:`None`,
otherwise return :data:`None`.
"""
if value is not None:
return mitogen.core.Secret(value)
def parse_python_path(s):
"""
Given the string set for ansible_python_interpeter, parse it using shell
syntax and return an appropriate argument vector.
"""
if s:
return ansible.utils.shlex.shlex_split(s)
def _connect_local(spec):
"""
Return ContextService arguments for a local connection.
"""
return {
'method': 'local',
'kwargs': {
@ -62,12 +83,10 @@ def _connect_local(spec):
}
def wrap_or_none(klass, value):
if value is not None:
return klass(value)
def _connect_ssh(spec):
"""
Return ContextService arguments for an SSH connection.
"""
if C.HOST_KEY_CHECKING:
check_host_keys = 'enforce'
else:
@ -79,10 +98,11 @@ def _connect_ssh(spec):
'check_host_keys': check_host_keys,
'hostname': spec['remote_addr'],
'username': spec['remote_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['password']),
'password': optional_secret(spec['password']),
'port': spec['port'],
'python_path': spec['python_path'],
'identity_file': spec['private_key_file'],
'identities_only': False,
'ssh_path': spec['ssh_executable'],
'connect_timeout': spec['ansible_ssh_timeout'],
'ssh_args': spec['ssh_args'],
@ -92,6 +112,9 @@ def _connect_ssh(spec):
def _connect_docker(spec):
"""
Return ContextService arguments for a Docker connection.
"""
return {
'method': 'docker',
'kwargs': {
@ -103,7 +126,25 @@ def _connect_docker(spec):
}
def _connect_kubectl(spec):
"""
Return ContextService arguments for a Kubernetes connection.
"""
return {
'method': 'kubectl',
'kwargs': {
'pod': spec['remote_addr'],
'python_path': spec['python_path'],
'connect_timeout': spec['ansible_ssh_timeout'] or spec['timeout'],
'kubectl_args': spec['extra_args'],
}
}
def _connect_jail(spec):
"""
Return ContextService arguments for a FreeBSD jail connection.
"""
return {
'method': 'jail',
'kwargs': {
@ -116,6 +157,9 @@ def _connect_jail(spec):
def _connect_lxc(spec):
"""
Return ContextService arguments for an LXC Classic container connection.
"""
return {
'method': 'lxc',
'kwargs': {
@ -126,11 +170,31 @@ def _connect_lxc(spec):
}
def _connect_lxd(spec):
"""
Return ContextService arguments for an LXD container connection.
"""
return {
'method': 'lxd',
'kwargs': {
'container': spec['remote_addr'],
'python_path': spec['python_path'],
'connect_timeout': spec['ansible_ssh_timeout'] or spec['timeout'],
}
}
def _connect_machinectl(spec):
"""
Return ContextService arguments for a machinectl connection.
"""
return _connect_setns(dict(spec, mitogen_kind='machinectl'))
def _connect_setns(spec):
"""
Return ContextService arguments for a mitogen_setns connection.
"""
return {
'method': 'setns',
'kwargs': {
@ -139,6 +203,7 @@ def _connect_setns(spec):
'python_path': spec['python_path'],
'kind': spec['mitogen_kind'],
'docker_path': spec['mitogen_docker_path'],
'kubectl_path': spec['mitogen_kubectl_path'],
'lxc_info_path': spec['mitogen_lxc_info_path'],
'machinectl_path': spec['mitogen_machinectl_path'],
}
@ -146,12 +211,15 @@ def _connect_setns(spec):
def _connect_su(spec):
"""
Return ContextService arguments for su as a become method.
"""
return {
'method': 'su',
'enable_lru': True,
'kwargs': {
'username': spec['become_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['become_pass']),
'password': optional_secret(spec['become_pass']),
'python_path': spec['python_path'],
'su_path': spec['become_exe'],
'connect_timeout': spec['timeout'],
@ -160,12 +228,15 @@ def _connect_su(spec):
def _connect_sudo(spec):
"""
Return ContextService arguments for sudo as a become method.
"""
return {
'method': 'sudo',
'enable_lru': True,
'kwargs': {
'username': spec['become_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['become_pass']),
'password': optional_secret(spec['become_pass']),
'python_path': spec['python_path'],
'sudo_path': spec['become_exe'],
'connect_timeout': spec['timeout'],
@ -175,12 +246,15 @@ def _connect_sudo(spec):
def _connect_doas(spec):
"""
Return ContextService arguments for doas as a become method.
"""
return {
'method': 'doas',
'enable_lru': True,
'kwargs': {
'username': spec['become_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['become_pass']),
'password': optional_secret(spec['become_pass']),
'python_path': spec['python_path'],
'doas_path': spec['become_exe'],
'connect_timeout': spec['timeout'],
@ -189,12 +263,14 @@ def _connect_doas(spec):
def _connect_mitogen_su(spec):
# su as a first-class proxied connection, not a become method.
"""
Return ContextService arguments for su as a first class connection.
"""
return {
'method': 'su',
'kwargs': {
'username': spec['remote_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['password']),
'password': optional_secret(spec['password']),
'python_path': spec['python_path'],
'su_path': spec['become_exe'],
'connect_timeout': spec['timeout'],
@ -203,12 +279,14 @@ def _connect_mitogen_su(spec):
def _connect_mitogen_sudo(spec):
# sudo as a first-class proxied connection, not a become method.
"""
Return ContextService arguments for sudo as a first class connection.
"""
return {
'method': 'sudo',
'kwargs': {
'username': spec['remote_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['password']),
'password': optional_secret(spec['password']),
'python_path': spec['python_path'],
'sudo_path': spec['become_exe'],
'connect_timeout': spec['timeout'],
@ -218,12 +296,14 @@ def _connect_mitogen_sudo(spec):
def _connect_mitogen_doas(spec):
# doas as a first-class proxied connection, not a become method.
"""
Return ContextService arguments for doas as a first class connection.
"""
return {
'method': 'doas',
'kwargs': {
'username': spec['remote_user'],
'password': wrap_or_none(mitogen.core.Secret, spec['password']),
'password': optional_secret(spec['password']),
'python_path': spec['python_path'],
'doas_path': spec['become_exe'],
'connect_timeout': spec['timeout'],
@ -231,12 +311,16 @@ def _connect_mitogen_doas(spec):
}
#: Mapping of connection method names to functions invoked as `func(spec)`
#: generating ContextService keyword arguments matching a connection
#: specification.
CONNECTION_METHOD = {
'docker': _connect_docker,
'kubectl': _connect_kubectl,
'jail': _connect_jail,
'local': _connect_local,
'lxc': _connect_lxc,
'lxd': _connect_lxc,
'lxd': _connect_lxd,
'machinectl': _connect_machinectl,
'setns': _connect_setns,
'ssh': _connect_ssh,
@ -249,17 +333,6 @@ CONNECTION_METHOD = {
}
def parse_python_path(s):
"""
Given the string set for ansible_python_interpeter, parse it using shell
syntax and return an appropriate argument vector.
"""
if not s:
return None
return ansible.utils.shlex.shlex_split(s)
def config_from_play_context(transport, inventory_name, connection):
"""
Return a dict representing all important connection configuration, allowing
@ -277,11 +350,16 @@ def config_from_play_context(transport, inventory_name, connection):
'become_pass': connection._play_context.become_pass,
'password': connection._play_context.password,
'port': connection._play_context.port,
'python_path': parse_python_path(connection.python_path),
'python_path': parse_python_path(
connection.get_task_var('ansible_python_interpreter',
default='/usr/bin/python')
),
'private_key_file': connection._play_context.private_key_file,
'ssh_executable': connection._play_context.ssh_executable,
'timeout': connection._play_context.timeout,
'ansible_ssh_timeout': connection.ansible_ssh_timeout,
'ansible_ssh_timeout':
connection.get_task_var('ansible_ssh_timeout',
default=C.DEFAULT_TIMEOUT),
'ssh_args': [
mitogen.core.to_text(term)
for s in (
@ -300,12 +378,22 @@ def config_from_play_context(transport, inventory_name, connection):
)
for term in ansible.utils.shlex.shlex_split(s or '')
],
'mitogen_via': connection.mitogen_via,
'mitogen_kind': connection.mitogen_kind,
'mitogen_docker_path': connection.mitogen_docker_path,
'mitogen_lxc_info_path': connection.mitogen_lxc_info_path,
'mitogen_machinectl_path': connection.mitogen_machinectl_path,
'mitogen_ssh_debug_level': connection.mitogen_ssh_debug_level,
'mitogen_via':
connection.get_task_var('mitogen_via'),
'mitogen_kind':
connection.get_task_var('mitogen_kind'),
'mitogen_docker_path':
connection.get_task_var('mitogen_docker_path'),
'mitogen_kubectl_path':
connection.get_task_var('mitogen_kubectl_path'),
'mitogen_lxc_info_path':
connection.get_task_var('mitogen_lxc_info_path'),
'mitogen_machinectl_path':
connection.get_task_var('mitogen_machinectl_path'),
'mitogen_ssh_debug_level':
connection.get_task_var('mitogen_ssh_debug_level'),
'extra_args':
connection.get_extra_args(),
}
@ -318,7 +406,7 @@ def config_from_hostvars(transport, inventory_name, connection,
config = config_from_play_context(transport, inventory_name, connection)
hostvars = dict(hostvars)
return dict(config, **{
'remote_addr': hostvars.get('ansible_hostname', inventory_name),
'remote_addr': hostvars.get('ansible_host', inventory_name),
'become': bool(become_user),
'become_user': become_user,
'become_pass': None,
@ -332,11 +420,40 @@ def config_from_hostvars(transport, inventory_name, connection,
'mitogen_via': hostvars.get('mitogen_via'),
'mitogen_kind': hostvars.get('mitogen_kind'),
'mitogen_docker_path': hostvars.get('mitogen_docker_path'),
'mitogen_kubectl_path': hostvars.get('mitogen_kubectl_path'),
'mitogen_lxc_info_path': hostvars.get('mitogen_lxc_info_path'),
'mitogen_machinectl_path': hostvars.get('mitogen_machinctl_path'),
})
class CallChain(mitogen.parent.CallChain):
call_aborted_msg = (
'Mitogen was disconnected from the remote environment while a call '
'was in-progress. If you feel this is in error, please file a bug. '
'Original error was: %s'
)
def _rethrow(self, recv):
try:
return recv.get().unpickle()
except mitogen.core.ChannelError as e:
raise ansible.errors.AnsibleConnectionFailure(
self.call_aborted_msg % (e,)
)
def call(self, func, *args, **kwargs):
"""
Like :meth:`mitogen.parent.CallChain.call`, but log timings.
"""
t0 = time.time()
try:
recv = self.call_async(func, *args, **kwargs)
return self._rethrow(recv)
finally:
LOG.debug('Call took %d ms: %r', 1000 * (time.time() - t0),
mitogen.parent.CallSpec(func, args, kwargs))
class Connection(ansible.plugins.connection.ConnectionBase):
#: mitogen.master.Broker for this worker.
broker = None
@ -352,52 +469,50 @@ class Connection(ansible.plugins.connection.ConnectionBase):
#: reached via become.
context = None
#: mitogen.parent.Context for the login account on the target. This is
#: always the login account, even when become=True.
#: Context for the login account on the target. This is always the login
#: account, even when become=True.
login_context = None
#: mitogen.parent.Context connected to the fork parent process in the
#: target user account.
fork_context = None
#: Only sudo, su, and doas are supported for now.
become_methods = ['sudo', 'su', 'doas']
#: Set to 'ansible_python_interpreter' by on_action_run().
python_path = None
#: Set to 'ansible_ssh_timeout' by on_action_run().
ansible_ssh_timeout = None
#: Set to 'mitogen_via' by on_action_run().
mitogen_via = None
#: Set to 'mitogen_kind' by on_action_run().
mitogen_kind = None
#: Set to 'mitogen_docker_path' by on_action_run().
mitogen_docker_path = None
#: Set to 'mitogen_lxc_info_path' by on_action_run().
mitogen_lxc_info_path = None
#: Set to 'mitogen_lxc_info_path' by on_action_run().
mitogen_machinectl_path = None
#: Set to 'mitogen_ssh_debug_level' by on_action_run().
mitogen_ssh_debug_level = None
#: Set to 'inventory_hostname' by on_action_run().
#: Dict containing init_child() return value as recorded at startup by
#: ContextService. Contains:
#:
#: fork_context: Context connected to the fork parent : process in the
#: target account.
#: home_dir: Target context's home directory.
#: good_temp_dir: A writeable directory where new temporary directories
#: can be created.
init_child_result = None
#: A :class:`mitogen.parent.CallChain` for calls made to the target
#: account, to ensure subsequent calls fail with the original exception if
#: pipelined directory creation or file transfer fails.
chain = None
#
# Note: any of the attributes below may be :data:`None` if the connection
# plugin was constructed directly by a non-cooperative action, such as in
# the case of the synchronize module.
#
#: Set to the host name as it appears in inventory by on_action_run().
inventory_hostname = None
#: Set to task_vars by on_action_run().
_task_vars = None
#: Set to 'hostvars' by on_action_run()
host_vars = None
#: Set to '_loader.get_basedir()' by on_action_run().
loader_basedir = None
#: Set by on_action_run()
delegate_to_hostname = None
#: Set after connection to the target context's home directory.
home_dir = None
#: Set to '_loader.get_basedir()' by on_action_run(). Used by mitogen_local
#: to change the working directory to that of the current playbook,
#: matching vanilla Ansible behaviour.
loader_basedir = None
def __init__(self, play_context, new_stdin, **kwargs):
assert ansible_mitogen.process.MuxProcess.unix_listener_path, (
@ -415,43 +530,53 @@ class Connection(ansible.plugins.connection.ConnectionBase):
# https://github.com/dw/mitogen/issues/140
self.close()
def on_action_run(self, task_vars, loader_basedir):
def on_action_run(self, task_vars, delegate_to_hostname, loader_basedir):
"""
Invoked by ActionModuleMixin to indicate a new task is about to start
executing. We use the opportunity to grab relevant bits from the
task-specific data.
:param dict task_vars:
Task variable dictionary.
:param str delegate_to_hostname:
:data:`None`, or the template-expanded inventory hostname this task
is being delegated to. A similar variable exists on PlayContext
when ``delegate_to:`` is active, however it is unexpanded.
:param str loader_basedir:
Loader base directory; see :attr:`loader_basedir`.
"""
self.ansible_ssh_timeout = task_vars.get('ansible_ssh_timeout',
C.DEFAULT_TIMEOUT)
self.python_path = task_vars.get('ansible_python_interpreter',
'/usr/bin/python')
self.mitogen_via = task_vars.get('mitogen_via')
self.mitogen_kind = task_vars.get('mitogen_kind')
self.mitogen_docker_path = task_vars.get('mitogen_docker_path')
self.mitogen_lxc_info_path = task_vars.get('mitogen_lxc_info_path')
self.mitogen_machinectl_path = task_vars.get('mitogen_machinectl_path')
self.mitogen_ssh_debug_level = task_vars.get('mitogen_ssh_debug_level')
self.inventory_hostname = task_vars['inventory_hostname']
self._task_vars = task_vars
self.host_vars = task_vars['hostvars']
self.delegate_to_hostname = delegate_to_hostname
self.loader_basedir = loader_basedir
self.close(new_task=True)
def get_task_var(self, key, default=None):
if self._task_vars and key in self._task_vars:
return self._task_vars[key]
return default
@property
def homedir(self):
self._connect()
return self.home_dir
return self.init_child_result['home_dir']
@property
def connected(self):
return self.context is not None
def _config_from_via(self, via_spec):
"""
Produce a dict connection specifiction given a string `via_spec`, of
the form `[become_user@]inventory_hostname`.
"""
become_user, _, inventory_name = via_spec.rpartition('@')
via_vars = self.host_vars[inventory_name]
if isinstance(via_vars, jinja2.runtime.Undefined):
raise ansible.errors.AnsibleConnectionFailure(
self.unknown_via_msg % (
self.mitogen_via,
via_spec,
inventory_name,
)
)
@ -492,20 +617,11 @@ class Connection(ansible.plugins.connection.ConnectionBase):
return stack, seen_names
def _connect(self):
def _connect_broker(self):
"""
Establish a connection to the master process's UNIX listener socket,
constructing a mitogen.master.Router to communicate with the master,
and a mitogen.parent.Context to represent it.
Depending on the original transport we should emulate, trigger one of
the _connect_*() service calls defined above to cause the master
process to establish the real connection on our behalf, or return a
reference to the existing one.
Establish a reference to the Broker, Router and parent context used for
connections.
"""
if self.connected:
return
if not self.broker:
self.broker = mitogen.master.Broker()
self.router, self.parent = mitogen.unix.connect(
@ -513,14 +629,47 @@ class Connection(ansible.plugins.connection.ConnectionBase):
broker=self.broker,
)
stack, _ = self._stack_from_config(
config_from_play_context(
transport=self.transport,
inventory_name=self.inventory_hostname,
connection=self
)
def _config_from_direct_connection(self):
"""
"""
return config_from_play_context(
transport=self.transport,
inventory_name=self.inventory_hostname,
connection=self
)
def _config_from_delegate_to(self):
return config_from_hostvars(
transport=self._play_context.connection,
inventory_name=self.delegate_to_hostname,
connection=self,
hostvars=self.host_vars[self.delegate_to_hostname],
become_user=(self._play_context.become_user
if self._play_context.become
else None),
)
def _build_stack(self):
"""
Construct a list of dictionaries representing the connection
configuration between the controller and the target. This is
additionally used by the integration tests "mitogen_get_stack" action
to fetch the would-be connection configuration.
"""
if self.delegate_to_hostname is not None:
target_config = self._config_from_delegate_to()
else:
target_config = self._config_from_direct_connection()
stack, _ = self._stack_from_config(target_config)
return stack
def _connect_stack(self, stack):
"""
Pass `stack` to ContextService, requesting a copy of the context object
representing the target. If no connection exists yet, ContextService
will establish it before returning it or throwing an error.
"""
dct = self.parent.call_service(
service_name='ansible_mitogen.services.ContextService',
method_name='get',
@ -533,13 +682,50 @@ class Connection(ansible.plugins.connection.ConnectionBase):
raise ansible.errors.AnsibleConnectionFailure(dct['msg'])
self.context = dct['context']
self.chain = CallChain(self.context, pipelined=True)
if self._play_context.become:
self.login_context = dct['via']
else:
self.login_context = self.context
self.fork_context = dct['init_child_result']['fork_context']
self.home_dir = dct['init_child_result']['home_dir']
self.init_child_result = dct['init_child_result']
def get_good_temp_dir(self):
self._connect()
return self.init_child_result['good_temp_dir']
def _generate_tmp_path(self):
return os.path.join(
self.get_good_temp_dir(),
'ansible_mitogen_action_%016x' % (
random.getrandbits(8*8),
)
)
def _make_tmp_path(self):
assert getattr(self._shell, 'tmpdir', None) is None
self._shell.tmpdir = self._generate_tmp_path()
LOG.debug('Temporary directory: %r', self._shell.tmpdir)
self.get_chain().call_no_reply(os.mkdir, self._shell.tmpdir)
return self._shell.tmpdir
def _connect(self):
"""
Establish a connection to the master process's UNIX listener socket,
constructing a mitogen.master.Router to communicate with the master,
and a mitogen.parent.Context to represent it.
Depending on the original transport we should emulate, trigger one of
the _connect_*() service calls defined above to cause the master
process to establish the real connection on our behalf, or return a
reference to the existing one.
"""
if self.connected:
return
self._connect_broker()
stack = self._build_stack()
self._connect_stack(stack)
def close(self, new_task=False):
"""
@ -547,7 +733,16 @@ class Connection(ansible.plugins.connection.ConnectionBase):
gracefully shut down, and wait for shutdown to complete. Safe to call
multiple times.
"""
if getattr(self._shell, 'tmpdir', None) is not None:
# Avoid CallChain to ensure exception is logged on failure.
self.context.call_no_reply(
ansible_mitogen.target.prune_tree,
self._shell.tmpdir,
)
self._shell.tmpdir = None
if self.context:
self.chain.reset()
self.parent.call_service(
service_name='ansible_mitogen.services.ContextService',
method_name='put',
@ -555,46 +750,33 @@ class Connection(ansible.plugins.connection.ConnectionBase):
)
self.context = None
self.fork_context = None
self.login_context = None
self.init_child_result = None
self.chain = None
if self.broker and not new_task:
self.broker.shutdown()
self.broker.join()
self.broker = None
self.router = None
def call_async(self, func, *args, **kwargs):
def get_chain(self, use_login=False, use_fork=False):
"""
Start a function call to the target.
:param bool use_login_context:
If present and :data:`True`, send the call to the login account
context rather than the optional become user context.
:returns:
mitogen.core.Receiver that receives the function call result.
Return the :class:`mitogen.parent.CallChain` to use for executing
function calls.
:param bool use_login:
If :data:`True`, always return the chain for the login account
rather than any active become user.
:param bool use_fork:
If :data:`True`, return the chain for the fork parent.
:returns mitogen.parent.CallChain:
"""
self._connect()
if kwargs.pop('use_login_context', None):
call_context = self.login_context
else:
call_context = self.context
return call_context.call_async(func, *args, **kwargs)
def call(self, func, *args, **kwargs):
"""
Start and wait for completion of a function call in the target.
:raises mitogen.core.CallError:
The function call failed.
:returns:
Function return value.
"""
t0 = time.time()
try:
return self.call_async(func, *args, **kwargs).get().unpickle()
finally:
LOG.debug('Call took %d ms: %r', 1000 * (time.time() - t0),
mitogen.parent.CallSpec(func, args, kwargs))
if use_login:
return self.login_context.default_call_chain
if use_fork:
return self.init_child_result['fork_context'].default_call_chain
return self.chain
def create_fork_child(self):
"""
@ -605,7 +787,17 @@ class Connection(ansible.plugins.connection.ConnectionBase):
:returns:
mitogen.core.Context of the new child.
"""
return self.call(ansible_mitogen.target.create_fork_child)
return self.get_chain(use_fork=True).call(
ansible_mitogen.target.create_fork_child
)
def get_extra_args(self):
"""
Overridden by connections/mitogen_kubectl.py to a list of additional
arguments for the command.
"""
# TODO: maybe use this for SSH too.
return []
def get_default_cwd(self):
"""
@ -634,7 +826,7 @@ class Connection(ansible.plugins.connection.ConnectionBase):
(return code, stdout bytes, stderr bytes)
"""
emulate_tty = (not in_data and sudoable)
rc, stdout, stderr = self.call(
rc, stdout, stderr = self.get_chain().call(
ansible_mitogen.target.exec_command,
cmd=mitogen.utils.cast(cmd),
in_data=mitogen.utils.cast(in_data),
@ -658,25 +850,37 @@ class Connection(ansible.plugins.connection.ConnectionBase):
:param str out_path:
Local filesystem path to write.
"""
output = self.call(ansible_mitogen.target.read_path,
mitogen.utils.cast(in_path))
output = self.get_chain().call(
ansible_mitogen.target.read_path,
mitogen.utils.cast(in_path),
)
ansible_mitogen.target.write_path(out_path, output)
def put_data(self, out_path, data, mode=None, utimes=None):
"""
Implement put_file() by caling the corresponding
ansible_mitogen.target function in the target.
Implement put_file() by caling the corresponding ansible_mitogen.target
function in the target, transferring small files inline. This is
pipelined and will return immediately; failed transfers are reported as
exceptions in subsequent functon calls.
:param str out_path:
Remote filesystem path to write.
:param byte data:
File contents to put.
"""
self.call(ansible_mitogen.target.write_path,
mitogen.utils.cast(out_path),
mitogen.core.Blob(data),
mode=mode,
utimes=utimes)
self.get_chain().call_no_reply(
ansible_mitogen.target.write_path,
mitogen.utils.cast(out_path),
mitogen.core.Blob(data),
mode=mode,
utimes=utimes,
)
#: Maximum size of a small file before switching to streaming
#: transfer. This should really be the same as
#: mitogen.services.FileService.IO_SIZE, however the message format has
#: slightly more overhead, so just randomly subtract 4KiB.
SMALL_FILE_LIMIT = mitogen.core.CHUNK_SIZE - 4096
def put_file(self, in_path, out_path):
"""
@ -695,14 +899,14 @@ class Connection(ansible.plugins.connection.ConnectionBase):
# If the file is sufficiently small, just ship it in the argument list
# rather than introducing an extra RTT for the child to request it from
# FileService.
if st.st_size <= 32768:
if st.st_size <= self.SMALL_FILE_LIMIT:
fp = open(in_path, 'rb')
try:
s = fp.read(32769)
s = fp.read(self.SMALL_FILE_LIMIT + 1)
finally:
fp.close()
# Ensure file was not growing during call.
# Ensure did not grow during read.
if len(s) == st.st_size:
return self.put_data(out_path, s, mode=st.st_mode,
utimes=(st.st_atime, st.st_mtime))
@ -712,7 +916,12 @@ class Connection(ansible.plugins.connection.ConnectionBase):
method_name='register',
path=mitogen.utils.cast(in_path)
)
self.call(
# For now this must remain synchronous, as the action plug-in may have
# passed us a temporary file to transfer. A future FileService could
# maintain an LRU list of open file descriptors to keep the temporary
# file alive, but that requires more work.
self.get_chain().call(
ansible_mitogen.target.transfer_file,
context=self.parent,
in_path=in_path,

@ -37,10 +37,12 @@ try:
from ansible.plugins.loader import connection_loader
from ansible.plugins.loader import module_loader
from ansible.plugins.loader import module_utils_loader
from ansible.plugins.loader import shell_loader
from ansible.plugins.loader import strategy_loader
except ImportError: # Ansible <2.4
from ansible.plugins import action_loader
from ansible.plugins import connection_loader
from ansible.plugins import module_loader
from ansible.plugins import module_utils_loader
from ansible.plugins import shell_loader
from ansible.plugins import strategy_loader

@ -110,19 +110,11 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
"""
self._connection.on_action_run(
task_vars=task_vars,
delegate_to_hostname=self._task.delegate_to,
loader_basedir=self._loader.get_basedir(),
)
return super(ActionModuleMixin, self).run(tmp, task_vars)
def call(self, func, *args, **kwargs):
"""
Arrange for a Python function to be called in the target context, which
should be some function from the standard library or
ansible_mitogen.target module. This junction point exists mainly as a
nice place to insert print statements during debugging.
"""
return self._connection.call(func, *args, **kwargs)
COMMAND_RESULT = {
'rc': 0,
'stdout': '',
@ -163,7 +155,10 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
target user account.
"""
LOG.debug('_remote_file_exists(%r)', path)
return self.call(os.path.exists, mitogen.utils.cast(path))
return self._connection.get_chain().call(
os.path.exists,
mitogen.utils.cast(path)
)
def _configure_module(self, module_name, module_args, task_vars=None):
"""
@ -179,48 +174,26 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
"""
assert False, "_is_pipelining_enabled() should never be called."
def _get_remote_tmp(self):
"""
Mitogen-only: return the 'remote_tmp' setting.
"""
try:
s = self._connection._shell.get_option('remote_tmp')
except AttributeError:
s = ansible.constants.DEFAULT_REMOTE_TMP # <=2.4.x
return self._remote_expand_user(s, sudoable=False)
def _make_tmp_path(self, remote_user=None):
"""
Replace the base implementation's use of shell to implement mkdtemp()
with an actual call to mkdtemp(). Like vanilla, the directory is always
created in the login account context.
Return the directory created by the Connection instance during
connection.
"""
LOG.debug('_make_tmp_path(remote_user=%r)', remote_user)
# _make_tmp_path() is basically a global stashed away as Shell.tmpdir.
# The copy action plugin violates layering and grabs this attribute
# directly.
self._connection._shell.tmpdir = self._connection.call(
ansible_mitogen.target.make_temp_directory,
base_dir=self._get_remote_tmp(),
use_login_context=True,
)
LOG.debug('Temporary directory: %r', self._connection._shell.tmpdir)
self._cleanup_remote_tmp = True
return self._connection._shell.tmpdir
return self._connection._make_tmp_path()
def _remove_tmp_path(self, tmp_path):
"""
Replace the base implementation's invocation of rm -rf with a call to
shutil.rmtree().
Stub out the base implementation's invocation of rm -rf, replacing it
with nothing, as the persistent interpreter automatically cleans up
after itself without introducing roundtrips.
"""
# The actual removal is pipelined by Connection.close().
LOG.debug('_remove_tmp_path(%r)', tmp_path)
if tmp_path is None:
tmp_path = self._connection._shell.tmpdir
if self._should_remove_tmp_path(tmp_path):
self.call(shutil.rmtree, tmp_path)
self._connection._shell.tmpdir = None
# Upstream _remove_tmp_path resets shell.tmpdir here, however
# connection.py uses that as the sole location of the temporary
# directory, if one exists.
# self._connection._shell.tmpdir = None
def _transfer_data(self, remote_path, data):
"""
@ -237,6 +210,11 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
self._connection.put_data(remote_path, data)
return remote_path
#: Actions listed here cause :func:`_fixup_perms2` to avoid a needless
#: roundtrip, as they modify file modes separately afterwards. This is due
#: to the method prototype having a default of `execute=True`.
FIXUP_PERMS_RED_HERRING = set(['copy'])
def _fixup_perms2(self, remote_paths, remote_user=None, execute=True):
"""
Mitogen always executes ActionBase helper methods in the context of the
@ -245,7 +223,7 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
"""
LOG.debug('_fixup_perms2(%r, remote_user=%r, execute=%r)',
remote_paths, remote_user, execute)
if execute:
if execute and self._load_name not in self.FIXUP_PERMS_RED_HERRING:
return self._remote_chmod(remote_paths, mode='u+x')
return self.COMMAND_RESULT.copy()
@ -257,7 +235,7 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
LOG.debug('_remote_chmod(%r, mode=%r, sudoable=%r)',
paths, mode, sudoable)
return self.fake_shell(lambda: mitogen.select.Select.all(
self._connection.call_async(
self._connection.get_chain().call_async(
ansible_mitogen.target.set_file_mode, path, mode
)
for path in paths
@ -270,9 +248,9 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
"""
LOG.debug('_remote_chown(%r, user=%r, sudoable=%r)',
paths, user, sudoable)
ent = self.call(pwd.getpwnam, user)
ent = self._connection.get_chain().call(pwd.getpwnam, user)
return self.fake_shell(lambda: mitogen.select.Select.all(
self._connection.call_async(
self._connection.get_chain().call_async(
os.chown, path, ent.pw_uid, ent.pw_gid
)
for path in paths
@ -300,8 +278,10 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
# ~/.ansible -> /home/dmw/.ansible
return os.path.join(self._connection.homedir, path[2:])
# ~root/.ansible -> /root/.ansible
return self.call(os.path.expanduser, mitogen.utils.cast(path),
use_login_context=not sudoable)
return self._connection.get_chain(use_login=(not sudoable)).call(
os.path.expanduser,
mitogen.utils.cast(path),
)
def get_task_timeout_secs(self):
"""
@ -312,6 +292,25 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
except AttributeError:
return getattr(self._task, 'async')
def _temp_file_gibberish(self, module_args, wrap_async):
# Ansible>2.5 module_utils reuses the action's temporary directory if
# one exists. Older versions error if this key is present.
if ansible.__version__ > '2.5':
if wrap_async:
# Sharing is not possible with async tasks, as in that case,
# the directory must outlive the action plug-in.
module_args['_ansible_tmpdir'] = None
else:
module_args['_ansible_tmpdir'] = self._connection._shell.tmpdir
# If _ansible_tmpdir is unset, Ansible>2.6 module_utils will use
# _ansible_remote_tmp as the location to create the module's temporary
# directory. Older versions error if this key is present.
if ansible.__version__ > '2.6':
module_args['_ansible_remote_tmp'] = (
self._connection.get_good_temp_dir()
)
def _execute_module(self, module_name=None, module_args=None, tmp=None,
task_vars=None, persist_files=False,
delete_remote_tmp=True, wrap_async=False):
@ -330,6 +329,7 @@ class ActionModuleMixin(ansible.plugins.action.ActionBase):
self._update_module_args(module_name, module_args, task_vars)
env = {}
self._compute_environment_string(env)
self._temp_file_gibberish(module_args, wrap_async)
self._connection._connect()
return ansible_mitogen.planner.invoke(

@ -55,6 +55,7 @@ import ansible_mitogen.target
LOG = logging.getLogger(__name__)
NO_METHOD_MSG = 'Mitogen: no invocation method found for: '
NO_INTERPRETER_MSG = 'module (%s) is missing interpreter line'
NO_MODULE_MSG = 'The module %s was not found in configured module paths.'
class Invocation(object):
@ -148,6 +149,8 @@ class Planner(object):
"""
new = dict((mitogen.core.UnicodeType(k), kwargs[k])
for k in kwargs)
new.setdefault('good_temp_dir',
self._inv.connection.get_good_temp_dir())
new.setdefault('cwd', self._inv.connection.get_default_cwd())
new.setdefault('extra_env', self._inv.connection.get_default_env())
new.setdefault('emulate_tty', True)
@ -393,6 +396,9 @@ _planners = [
def get_module_data(name):
path = ansible_mitogen.loaders.module_loader.find_plugin(name, '')
if path is None:
raise ansible.errors.AnsibleError(NO_MODULE_MSG % (name,))
with open(path, 'rb') as fp:
source = fp.read()
return mitogen.core.to_text(path), source
@ -474,7 +480,7 @@ def invoke(invocation):
response = _invoke_forked_task(invocation, planner)
else:
_propagate_deps(invocation, planner, invocation.connection.context)
response = invocation.connection.call(
response = invocation.connection.get_chain().call(
ansible_mitogen.target.run_module,
kwargs=planner.get_kwargs(),
)

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -0,0 +1,56 @@
# coding: utf-8
# Copyright 2018, Yannig Perré
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys
import ansible.plugins.connection.kubectl
from ansible.module_utils.six import iteritems
try:
import ansible_mitogen
except ImportError:
base_dir = os.path.dirname(__file__)
sys.path.insert(0, os.path.abspath(os.path.join(base_dir, '../../..')))
del base_dir
import ansible_mitogen.connection
class Connection(ansible_mitogen.connection.Connection):
transport = 'kubectl'
def get_extra_args(self):
parameters = []
for key, option in iteritems(ansible.plugins.connection.kubectl.CONNECTION_OPTIONS):
if self.get_task_var('ansible_' + key) is not None:
parameters += [ option, self.get_task_var('ansible_' + key) ]
return parameters

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys
@ -41,6 +42,8 @@ DOCUMENTATION = """
options:
"""
import ansible.plugins.connection.ssh
try:
import ansible_mitogen.connection
except ImportError:
@ -53,3 +56,10 @@ import ansible_mitogen.connection
class Connection(ansible_mitogen.connection.Connection):
transport = 'ssh'
vanilla_class = ansible.plugins.connection.ssh.Connection
@staticmethod
def _create_control_path(*args, **kwargs):
"""Forward _create_control_path() to the implementation in ssh.py."""
# https://github.com/dw/mitogen/issues/342
return Connection.vanilla_class._create_control_path(*args, **kwargs)

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys
@ -44,12 +45,12 @@ import sys
# debuggers and isinstance() work predictably.
#
try:
import ansible_mitogen
except ImportError:
base_dir = os.path.dirname(__file__)
sys.path.insert(0, os.path.abspath(os.path.join(base_dir, '../../..')))
del base_dir
BASE_DIR = os.path.abspath(
os.path.join(os.path.dirname(__file__), '../../..')
)
if BASE_DIR not in sys.path:
sys.path.insert(0, BASE_DIR)
import ansible_mitogen.strategy
import ansible.plugins.strategy.linear

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys
@ -44,12 +45,12 @@ import sys
# debuggers and isinstance() work predictably.
#
try:
import ansible_mitogen
except ImportError:
base_dir = os.path.dirname(__file__)
sys.path.insert(0, os.path.abspath(os.path.join(base_dir, '../../..')))
del base_dir
BASE_DIR = os.path.abspath(
os.path.join(os.path.dirname(__file__), '../../..')
)
if BASE_DIR not in sys.path:
sys.path.insert(0, BASE_DIR)
import ansible_mitogen.loaders
import ansible_mitogen.strategy

@ -26,6 +26,7 @@
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import os.path
import sys
@ -44,12 +45,12 @@ import sys
# debuggers and isinstance() work predictably.
#
try:
import ansible_mitogen
except ImportError:
base_dir = os.path.dirname(__file__)
sys.path.insert(0, os.path.abspath(os.path.join(base_dir, '../../..')))
del base_dir
BASE_DIR = os.path.abspath(
os.path.join(os.path.dirname(__file__), '../../..')
)
if BASE_DIR not in sys.path:
sys.path.insert(0, BASE_DIR)
import ansible_mitogen.loaders
import ansible_mitogen.strategy

@ -27,12 +27,19 @@
# POSSIBILITY OF SUCH DAMAGE.
from __future__ import absolute_import
import atexit
import errno
import logging
import os
import signal
import socket
import sys
import time
try:
import faulthandler
except ImportError:
faulthandler = None
import mitogen
import mitogen.core
@ -43,6 +50,7 @@ import mitogen.service
import mitogen.unix
import mitogen.utils
import ansible.constants as C
import ansible_mitogen.logging
import ansible_mitogen.services
@ -52,6 +60,54 @@ from mitogen.core import b
LOG = logging.getLogger(__name__)
def clean_shutdown(sock):
"""
Shut the write end of `sock`, causing `recv` in the worker process to wake
up with a 0-byte read and initiate mux process exit, then wait for a 0-byte
read from the read end, which will occur after the the child closes the
descriptor on exit.
This is done using :mod:`atexit` since Ansible lacks any more sensible hook
to run code during exit, and unless some synchronization exists with
MuxProcess, debug logs may appear on the user's terminal *after* the prompt
has been printed.
"""
sock.shutdown(socket.SHUT_WR)
sock.recv(1)
def getenv_int(key, default=0):
"""
Get an integer-valued environment variable `key`, if it exists and parses
as an integer, otherwise return `default`.
"""
try:
return int(os.environ.get(key, str(default)))
except ValueError:
return default
def setup_gil():
"""
Set extremely long GIL release interval to let threads naturally progress
through CPU-heavy sequences without forcing the wake of another thread that
may contend trying to run the same CPU-heavy code. For the new-style work,
this drops runtime ~33% and involuntary context switches by >80%,
essentially making threads cooperatively scheduled.
"""
try:
# Python 2.
sys.setcheckinterval(100000)
except AttributeError:
pass
try:
# Python 3.
sys.setswitchinterval(10)
except AttributeError:
pass
class MuxProcess(object):
"""
Implement a subprocess forked from the Ansible top-level, as a safe place
@ -109,11 +165,19 @@ class MuxProcess(object):
if cls.worker_sock is not None:
return
if faulthandler is not None:
faulthandler.enable()
setup_gil()
cls.unix_listener_path = mitogen.unix.make_socket_path()
cls.worker_sock, cls.child_sock = socket.socketpair()
atexit.register(lambda: clean_shutdown(cls.worker_sock))
mitogen.core.set_cloexec(cls.worker_sock.fileno())
mitogen.core.set_cloexec(cls.child_sock.fileno())
if os.environ.get('MITOGEN_PROFILING'):
mitogen.core.enable_profiling()
cls.original_env = dict(os.environ)
cls.child_pid = os.fork()
ansible_mitogen.logging.setup()
@ -139,10 +203,18 @@ class MuxProcess(object):
# Let the parent know our listening socket is ready.
mitogen.core.io_op(self.child_sock.send, b('1'))
self.child_sock.send(b('1'))
# Block until the socket is closed, which happens on parent exit.
mitogen.core.io_op(self.child_sock.recv, 1)
def _enable_router_debug(self):
if 'MITOGEN_ROUTER_DEBUG' in os.environ:
self.router.enable_debug()
def _enable_stack_dumps(self):
secs = getenv_int('MITOGEN_DUMP_THREAD_STACKS', default=0)
if secs:
mitogen.debug.dump_to_logger(secs=secs)
def _setup_master(self):
"""
Construct a Router, Broker, and mitogen.unix listener
@ -155,11 +227,10 @@ class MuxProcess(object):
self.listener = mitogen.unix.Listener(
router=self.router,
path=self.unix_listener_path,
backlog=C.DEFAULT_FORKS,
)
if 'MITOGEN_ROUTER_DEBUG' in os.environ:
self.router.enable_debug()
if 'MITOGEN_DUMP_THREAD_STACKS' in os.environ:
mitogen.debug.dump_to_logger()
self._enable_router_debug()
self._enable_stack_dumps()
def _setup_services(self):
"""
@ -174,7 +245,7 @@ class MuxProcess(object):
ansible_mitogen.services.ContextService(self.router),
ansible_mitogen.services.ModuleDepService(self.router),
],
size=int(os.environ.get('MITOGEN_POOL_SIZE', '16')),
size=getenv_int('MITOGEN_POOL_SIZE', default=16),
)
LOG.debug('Service pool configured: size=%d', self.pool.size)
@ -199,4 +270,10 @@ class MuxProcess(object):
ourself. In future this should gracefully join the pool, but TERM is
fine for now.
"""
if os.environ.get('MITOGEN_PROFILING'):
# TODO: avoid killing pool threads before they have written their
# .pstats. Really shouldn't be using kill() here at all, but hard
# to guarantee services can always be unblocked during shutdown.
time.sleep(1)
os.kill(os.getpid(), signal.SIGTERM)

@ -38,12 +38,14 @@ how to build arguments for it, preseed related data, etc.
from __future__ import absolute_import
from __future__ import unicode_literals
import atexit
import ctypes
import errno
import imp
import json
import logging
import os
import shlex
import sys
import tempfile
import types
@ -82,6 +84,110 @@ iteritems = getattr(dict, 'iteritems', dict.items)
LOG = logging.getLogger(__name__)
class EnvironmentFileWatcher(object):
"""
Usually Ansible edits to /etc/environment and ~/.pam_environment are
reflected in subsequent tasks if become:true or SSH multiplexing is
disabled, due to sudo and/or SSH reinvoking pam_env. Rather than emulate
existing semantics, do our best to ensure edits are always reflected.
This can't perfectly replicate the existing behaviour, but it can safely
update and remove keys that appear to originate in `path`, and that do not
conflict with any existing environment key inherited from elsewhere.
A more robust future approach may simply be to arrange for the persistent
interpreter to restart when a change is detected.
"""
def __init__(self, path):
self.path = os.path.expanduser(path)
#: Inode data at time of last check.
self._st = self._stat()
#: List of inherited keys appearing to originated from this file.
self._keys = [key for key, value in self._load()
if value == os.environ.get(key)]
LOG.debug('%r installed; existing keys: %r', self, self._keys)
def __repr__(self):
return 'EnvironmentFileWatcher(%r)' % (self.path,)
def _stat(self):
try:
return os.stat(self.path)
except OSError:
return None
def _load(self):
try:
with open(self.path, 'r') as fp:
return list(self._parse(fp))
except IOError:
return []
def _parse(self, fp):
"""
linux-pam-1.3.1/modules/pam_env/pam_env.c#L207
"""
for line in fp:
# ' #export foo=some var ' -> ['#export', 'foo=some var ']
bits = shlex.split(line, comments=True)
if (not bits) or bits[0].startswith('#'):
continue
if bits[0] == 'export':
bits.pop(0)
key, sep, value = (' '.join(bits)).partition('=')
if key and sep:
yield key, value
def _on_file_changed(self):
LOG.debug('%r: file changed, reloading', self)
for key, value in self._load():
if key in os.environ:
LOG.debug('%r: existing key %r=%r exists, not setting %r',
self, key, os.environ[key], value)
else:
LOG.debug('%r: setting key %r to %r', self, key, value)
self._keys.append(key)
os.environ[key] = value
def _remove_existing(self):
"""
When a change is detected, remove keys that existed in the old file.
"""
for key in self._keys:
if key in os.environ:
LOG.debug('%r: removing old key %r', self, key)
del os.environ[key]
self._keys = []
def check(self):
"""
Compare the :func:`os.stat` for the pam_env style environmnt file
`path` with the previous result `old_st`, which may be :data:`None` if
the previous stat attempt failed. Reload its contents if the file has
changed or appeared since last attempt.
:returns:
New :func:`os.stat` result. The new call to :func:`reload_env` should
pass it as the value of `old_st`.
"""
st = self._stat()
if self._st == st:
return
self._st = st
self._remove_existing()
if st is None:
LOG.debug('%r: file has disappeared', self)
else:
self._on_file_changed()
_pam_env_watcher = EnvironmentFileWatcher('~/.pam_environment')
_etc_env_watcher = EnvironmentFileWatcher('/etc/environment')
def utf8(s):
"""
Coerce an object to bytes if it is Unicode.
@ -125,6 +231,11 @@ class Runner(object):
This is passed as a string rather than a dict in order to mimic the
implicit bytes/str conversion behaviour of a 2.x controller running
against a 3.x target.
:param str good_temp_dir:
The writeable temporary directory for this user account reported by
:func:`ansible_mitogen.target.init_child` passed via the controller.
This is specified explicitly to remain compatible with Ansible<2.5, and
for forked tasks where init_child never runs.
:param dict env:
Additional environment variables to set during the run. Keys with
:data:`None` are unset if present.
@ -137,16 +248,40 @@ class Runner(object):
When :data:`True`, indicate the runner should detach the context from
its parent after setup has completed successfully.
"""
def __init__(self, module, service_context, json_args, extra_env=None,
cwd=None, env=None, econtext=None, detach=False):
def __init__(self, module, service_context, json_args, good_temp_dir,
extra_env=None, cwd=None, env=None, econtext=None,
detach=False):
self.module = module
self.service_context = service_context
self.econtext = econtext
self.detach = detach
self.args = json.loads(json_args)
self.good_temp_dir = good_temp_dir
self.extra_env = extra_env
self.env = env
self.cwd = cwd
#: If not :data:`None`, :meth:`get_temp_dir` had to create a temporary
#: directory for this run, because we're in an asynchronous task, or
#: because the originating action did not create a directory.
self._temp_dir = None
def get_temp_dir(self):
path = self.args.get('_ansible_tmpdir')
if path is not None:
return path
if self._temp_dir is None:
self._temp_dir = tempfile.mkdtemp(
prefix='ansible_mitogen_runner_',
dir=self.good_temp_dir,
)
return self._temp_dir
def revert_temp_dir(self):
if self._temp_dir is not None:
ansible_mitogen.target.prune_tree(self._temp_dir)
self._temp_dir = None
def setup(self):
"""
@ -154,12 +289,25 @@ class Runner(object):
from the parent, as :meth:`run` may detach prior to beginning
execution. The base implementation simply prepares the environment.
"""
self._setup_cwd()
self._setup_environ()
def _setup_cwd(self):
"""
For situations like sudo to a non-privileged account, CWD could be
$HOME of the old account, which could have mode go=, which means it is
impossible to restore the old directory, so don't even try.
"""
if self.cwd:
# For situations like sudo to another non-privileged account, the
# CWD could be $HOME of the old account, which could have mode go=,
# which means it is impossible to restore the old directory, so
# don't even bother.
os.chdir(self.cwd)
def _setup_environ(self):
"""
Apply changes from /etc/environment files before creating a
TemporaryEnvironment to snapshot environment state prior to module run.
"""
_pam_env_watcher.check()
_etc_env_watcher.check()
env = dict(self.extra_env or {})
if self.env:
env.update(self.env)
@ -171,33 +319,7 @@ class Runner(object):
implementation simply restores the original environment.
"""
self._env.revert()
self._try_cleanup_temp()
def _cleanup_temp(self):
"""
Empty temp_dir in time for the next module invocation.
"""
for name in os.listdir(ansible_mitogen.target.temp_dir):
if name in ('.', '..'):
continue
path = os.path.join(ansible_mitogen.target.temp_dir, name)
LOG.debug('Deleting %r', path)
ansible_mitogen.target.prune_tree(path)
def _try_cleanup_temp(self):
"""
During broker shutdown triggered by async task timeout or loss of
connection to the parent, it is possible for prune_tree() in
target.py::_on_broker_shutdown() to run before _cleanup_temp(), so skip
cleanup if the directory or a file disappears from beneath us.
"""
try:
self._cleanup_temp()
except (IOError, OSError) as e:
if e.args[0] == errno.ENOENT:
return
raise
self.revert_temp_dir()
def _run(self):
"""
@ -264,9 +386,9 @@ class ModuleUtilsImporter(object):
mod.__loader__ = self
if is_pkg:
mod.__path__ = []
mod.__package__ = fullname
mod.__package__ = str(fullname)
else:
mod.__package__ = fullname.rpartition('.')[0]
mod.__package__ = str(fullname.rpartition('.')[0])
exec(code, mod.__dict__)
self._loaded.add(fullname)
return mod
@ -310,7 +432,8 @@ class NewStyleStdio(object):
"""
Patch ansible.module_utils.basic argument globals.
"""
def __init__(self, args):
def __init__(self, args, temp_dir):
self.temp_dir = temp_dir
self.original_stdout = sys.stdout
self.original_stderr = sys.stderr
self.original_stdin = sys.stdin
@ -320,7 +443,15 @@ class NewStyleStdio(object):
ansible.module_utils.basic._ANSIBLE_ARGS = utf8(encoded)
sys.stdin = StringIO(mitogen.core.to_text(encoded))
self.original_get_path = getattr(ansible.module_utils.basic,
'get_module_path', None)
ansible.module_utils.basic.get_module_path = self._get_path
def _get_path(self):
return self.temp_dir
def revert(self):
ansible.module_utils.basic.get_module_path = self.original_get_path
sys.stdout = self.original_stdout
sys.stderr = self.original_stderr
sys.stdin = self.original_stdin
@ -364,7 +495,7 @@ class ProgramRunner(Runner):
fetched via :meth:`_get_program`.
"""
filename = self._get_program_filename()
path = os.path.join(ansible_mitogen.target.temp_dir, filename)
path = os.path.join(self.get_temp_dir(), filename)
self.program_fp = open(path, 'wb')
self.program_fp.write(self._get_program())
self.program_fp.flush()
@ -444,7 +575,7 @@ class ArgsFileRunner(Runner):
self.args_fp = tempfile.NamedTemporaryFile(
prefix='ansible_mitogen',
suffix='-args',
dir=ansible_mitogen.target.temp_dir,
dir=self.get_temp_dir(),
)
self.args_fp.write(utf8(self._get_args_contents()))
self.args_fp.flush()
@ -548,10 +679,18 @@ class NewStyleRunner(ScriptRunner):
for fullname in self.module_map['builtin']:
mitogen.core.import_module(fullname)
def _setup_excepthook(self):
"""
Starting with Ansible 2.6, some modules (file.py) install a
sys.excepthook and never clean it up. So we must preserve the original
excepthook and restore it after the run completes.
"""
self.original_excepthook = sys.excepthook
def setup(self):
super(NewStyleRunner, self).setup()
self._stdio = NewStyleStdio(self.args)
self._stdio = NewStyleStdio(self.args, self.get_temp_dir())
# It is possible that not supplying the script filename will break some
# module, but this has never been a bug report. Instead act like an
# interpreter that had its script piped on stdin.
@ -561,12 +700,17 @@ class NewStyleRunner(ScriptRunner):
module_utils=self.module_map['custom'],
)
self._setup_imports()
self._setup_excepthook()
if libc__res_init:
libc__res_init()
def _revert_excepthook(self):
sys.excepthook = self.original_excepthook
def revert(self):
self._argv.revert()
self._stdio.revert()
self._revert_excepthook()
super(NewStyleRunner, self).revert()
def _get_program_filename(self):
@ -600,9 +744,39 @@ class NewStyleRunner(ScriptRunner):
else:
main_module_name = b'__main__'
def _run(self):
code = self._get_code()
def _handle_magic_exception(self, mod, exc):
"""
Beginning with Ansible >2.6, some modules (file.py) install a
sys.excepthook which is a closure over AnsibleModule, redirecting the
magical exception to AnsibleModule.fail_json().
For extra special needs bonus points, the class is not defined in
module_utils, but is defined in the module itself, meaning there is no
type for isinstance() that outlasts the invocation.
"""
klass = getattr(mod, 'AnsibleModuleError', None)
if klass and isinstance(exc, klass):
mod.module.fail_json(**exc.results)
def _run_code(self, code, mod):
try:
if mitogen.core.PY3:
exec(code, vars(mod))
else:
exec('exec code in vars(mod)')
except Exception as e:
self._handle_magic_exception(mod, e)
raise
def _run_atexit_funcs(self):
"""
Newer Ansibles use atexit.register() to trigger tmpdir cleanup, when
AnsibleModule.tmpdir is responsible for creating its own temporary
directory.
"""
atexit._run_exitfuncs()
def _run(self):
mod = types.ModuleType(self.main_module_name)
mod.__package__ = None
# Some Ansible modules use __file__ to find the Ansiballz temporary
@ -610,16 +784,17 @@ class NewStyleRunner(ScriptRunner):
# don't want to pointlessly write the module to disk when it never
# actually needs to exist. So just pass the filename as it would exist.
mod.__file__ = os.path.join(
ansible_mitogen.target.temp_dir,
self.get_temp_dir(),
'ansible_module_' + os.path.basename(self.path),
)
code = self._get_code()
exc = None
try:
if mitogen.core.PY3:
exec(code, vars(mod))
else:
exec('exec code in vars(mod)')
try:
self._run_code(code, mod)
finally:
self._run_atexit_funcs()
except SystemExit as e:
exc = e

@ -46,14 +46,23 @@ import os.path
import sys
import threading
import ansible.constants
import mitogen
import mitogen.service
import mitogen.utils
import ansible_mitogen.loaders
import ansible_mitogen.module_finder
import ansible_mitogen.target
LOG = logging.getLogger(__name__)
# Force load of plugin to ensure ConfigManager has definitions loaded. Done
# during module import to ensure a single-threaded environment; PluginLoader
# is not thread-safe.
ansible_mitogen.loaders.shell_loader.get('sh')
if sys.version_info[0] == 3:
def reraise(tp, value, tb):
@ -69,6 +78,17 @@ else:
)
def _get_candidate_temp_dirs():
options = ansible.constants.config.get_plugin_options('shell', 'sh')
# Pre 2.5 this came from ansible.constants.
remote_tmp = (options.get('remote_tmp') or
ansible.constants.DEFAULT_REMOTE_TMP)
dirs = list(options.get('system_tmpdirs', ('/var/tmp', '/tmp')))
dirs.insert(0, remote_tmp)
return mitogen.utils.cast(dirs)
class Error(Exception):
pass
@ -119,11 +139,15 @@ class ContextService(mitogen.service.Service):
count reaches zero.
"""
LOG.debug('%r.put(%r)', self, context)
if self._refs_by_context.get(context, 0) == 0:
LOG.warning('%r.put(%r): refcount was 0. shutdown_all called?',
self, context)
return
self._refs_by_context[context] -= 1
self._lock.acquire()
try:
if self._refs_by_context.get(context, 0) == 0:
LOG.warning('%r.put(%r): refcount was 0. shutdown_all called?',
self, context)
return
self._refs_by_context[context] -= 1
finally:
self._lock.release()
def key_from_kwargs(self, **kwargs):
"""
@ -163,29 +187,24 @@ class ContextService(mitogen.service.Service):
self._lock.release()
return count
def _shutdown(self, context, lru=None, new_context=None):
def _shutdown_unlocked(self, context, lru=None, new_context=None):
"""
Arrange for `context` to be shut down, and optionally add `new_context`
to the LRU list while holding the lock.
"""
LOG.info('%r._shutdown(): shutting down %r', self, context)
LOG.info('%r._shutdown_unlocked(): shutting down %r', self, context)
context.shutdown()
key = self._key_by_context[context]
del self._response_by_key[key]
del self._refs_by_context[context]
del self._key_by_context[context]
if lru and context in lru:
lru.remove(context)
if new_context:
lru.append(new_context)
self._lock.acquire()
try:
del self._response_by_key[key]
del self._refs_by_context[context]
del self._key_by_context[context]
if lru and context in lru:
lru.remove(context)
if new_context:
lru.append(new_context)
finally:
self._lock.release()
def _update_lru(self, new_context, spec, via):
def _update_lru_unlocked(self, new_context, spec, via):
"""
Update the LRU ("MRU"?) list associated with the connection described
by `kwargs`, destroying the most recently created context if the list
@ -204,16 +223,27 @@ class ContextService(mitogen.service.Service):
'but they are all marked as in-use.', via)
return
self._shutdown(context, lru=lru, new_context=new_context)
self._shutdown_unlocked(context, lru=lru, new_context=new_context)
def _update_lru(self, new_context, spec, via):
self._lock.acquire()
try:
self._update_lru_unlocked(new_context, spec, via)
finally:
self._lock.release()
@mitogen.service.expose(mitogen.service.AllowParents())
def shutdown_all(self):
"""
For testing use, arrange for all connections to be shut down.
"""
for context in list(self._key_by_context):
self._shutdown(context)
self._lru_by_via = {}
self._lock.acquire()
try:
for context in list(self._key_by_context):
self._shutdown_unlocked(context)
self._lru_by_via = {}
finally:
self._lock.release()
def _on_stream_disconnect(self, stream):
"""
@ -249,8 +279,19 @@ class ContextService(mitogen.service.Service):
)
def _send_module_forwards(self, context):
for fullname in self.ALWAYS_PRELOAD:
self.router.responder.forward_module(context, fullname)
self.router.responder.forward_modules(context, self.ALWAYS_PRELOAD)
_candidate_temp_dirs = None
def _get_candidate_temp_dirs(self):
"""
Return a list of locations to try to create the single temporary
directory used by the run. This simply caches the (expensive) plugin
load of :func:`_get_candidate_temp_dirs`.
"""
if self._candidate_temp_dirs is None:
self._candidate_temp_dirs = _get_candidate_temp_dirs()
return self._candidate_temp_dirs
def _connect(self, key, spec, via=None):
"""
@ -298,8 +339,11 @@ class ContextService(mitogen.service.Service):
lambda: self._on_stream_disconnect(stream))
self._send_module_forwards(context)
init_child_result = context.call(ansible_mitogen.target.init_child,
log_level=LOG.getEffectiveLevel())
init_child_result = context.call(
ansible_mitogen.target.init_child,
log_level=LOG.getEffectiveLevel(),
candidate_temp_dirs=self._get_candidate_temp_dirs(),
)
if os.environ.get('MITOGEN_DUMP_THREAD_STACKS'):
from mitogen import debug
@ -345,6 +389,12 @@ class ContextService(mitogen.service.Service):
return latch
disconnect_msg = (
'Channel was disconnected while connection attempt was in progress; '
'this may be caused by an abnormal Ansible exit, or due to an '
'unreliable target.'
)
@mitogen.service.expose(mitogen.service.AllowParents())
@mitogen.service.arg_spec({
'stack': list
@ -372,6 +422,13 @@ class ContextService(mitogen.service.Service):
if isinstance(result, tuple): # exc_info()
reraise(*result)
via = result['context']
except mitogen.core.ChannelError:
return {
'context': None,
'init_child_result': None,
'method_name': spec['method'],
'msg': self.disconnect_msg,
}
except mitogen.core.StreamError as e:
return {
'context': None,
@ -388,6 +445,8 @@ class ModuleDepService(mitogen.service.Service):
Scan a new-style module and produce a cached mapping of module_utils names
to their resolved filesystem paths.
"""
invoker_class = mitogen.service.SerializedInvoker
def __init__(self, *args, **kwargs):
super(ModuleDepService, self).__init__(*args, **kwargs)
self._cache = {}

@ -59,7 +59,7 @@ def wrap_connection_loader__get(name, *args, **kwargs):
While the strategy is active, rewrite connection_loader.get() calls for
some transports into requests for a compatible Mitogen transport.
"""
if name in ('docker', 'jail', 'local', 'lxc',
if name in ('docker', 'kubectl', 'jail', 'local', 'lxc',
'lxd', 'machinectl', 'setns', 'ssh'):
name = 'mitogen_' + name
return connection_loader__get(name, *args, **kwargs)

@ -43,30 +43,64 @@ import operator
import os
import pwd
import re
import resource
import signal
import stat
import subprocess
import sys
import tempfile
import traceback
import types
import ansible.module_utils.json_utils
import ansible_mitogen.runner
import mitogen.core
import mitogen.fork
import mitogen.parent
import mitogen.service
# Ansible since PR #41749 inserts "import __main__" into
# ansible.module_utils.basic. Mitogen's importer will refuse such an import, so
# we must setup a fake "__main__" before that module is ever imported. The
# str() is to cast Unicode to bytes on Python 2.6.
if not sys.modules.get(str('__main__')):
sys.modules[str('__main__')] = types.ModuleType(str('__main__'))
import ansible.module_utils.json_utils
import ansible_mitogen.runner
LOG = logging.getLogger(__name__)
#: Set by init_child() to the single temporary directory that will exist for
#: the duration of the process.
temp_dir = None
MAKE_TEMP_FAILED_MSG = (
"Unable to find a useable temporary directory. This likely means no\n"
"system-supplied TMP directory can be written to, or all directories\n"
"were mounted on 'noexec' filesystems.\n"
"\n"
"The following paths were tried:\n"
" %(namelist)s\n"
"\n"
"Please check '-vvv' output for a log of individual path errors."
)
#: Initialized to an econtext.parent.Context pointing at a pristine fork of
#: the target Python interpreter before it executes any code or imports.
_fork_parent = None
#: Set by :func:`init_child` to the name of a writeable and executable
#: temporary directory accessible by the active user account.
good_temp_dir = None
# issue #362: subprocess.Popen(close_fds=True) aka. AnsibleModule.run_command()
# loops the entire SC_OPEN_MAX space. CentOS>5 ships with 1,048,576 FDs by
# default, resulting in huge (>500ms) runtime waste running many commands.
# Therefore if we are a child, cap the range to something reasonable.
rlimit = resource.getrlimit(resource.RLIMIT_NOFILE)
if (rlimit[0] > 512 or rlimit[1] > 512) and not mitogen.is_master:
resource.setrlimit(resource.RLIMIT_NOFILE, (512, 512))
subprocess.MAXFD = 512 # Python <3.x
del rlimit
def get_small_file(context, path):
"""
@ -180,29 +214,77 @@ def _on_broker_shutdown():
prune_tree(temp_dir)
@mitogen.core.takes_econtext
def reset_temp_dir(econtext):
def is_good_temp_dir(path):
"""
Create one temporary directory to be reused by all runner.py invocations
for the lifetime of the process. The temporary directory is changed for
each forked job, and emptied as necessary by runner.py::_cleanup_temp()
after each module invocation.
Return :data:`True` if `path` can be used as a temporary directory, logging
any failures that may cause it to be unsuitable. If the directory doesn't
exist, we attempt to create it using :func:`os.makedirs`.
"""
if not os.path.exists(path):
try:
os.makedirs(path, mode=int('0700', 8))
except OSError as e:
LOG.debug('temp dir %r unusable: did not exist and attempting '
'to create it failed: %s', path, e)
return False
try:
tmp = tempfile.NamedTemporaryFile(
prefix='ansible_mitogen_is_good_temp_dir',
dir=path,
)
except (OSError, IOError) as e:
LOG.debug('temp dir %r unusable: %s', path, e)
return False
try:
try:
os.chmod(tmp.name, int('0700', 8))
except OSError as e:
LOG.debug('temp dir %r unusable: %s: chmod failed: %s',
path, e)
return False
try:
# access(.., X_OK) is sufficient to detect noexec.
if not os.access(tmp.name, os.X_OK):
raise OSError('filesystem appears to be mounted noexec')
except OSError as e:
LOG.debug('temp dir %r unusable: %s: %s', path, e)
return False
finally:
tmp.close()
return True
The result is that a context need only create and delete one directory
during startup and shutdown, and no further filesystem writes need occur
assuming no modules execute that create temporary files.
def find_good_temp_dir(candidate_temp_dirs):
"""
Given a list of candidate temp directories extracted from ``ansible.cfg``,
combine it with the Python-builtin list of candidate directories used by
:mod:`tempfile`, then iteratively try each until one is found that is both
writeable and executable.
:param list candidate_temp_dirs:
List of candidate $variable-expanded and tilde-expanded directory paths
that may be usable as a temporary directory.
"""
global temp_dir
# https://github.com/dw/mitogen/issues/239
temp_dir = tempfile.mkdtemp(prefix='ansible_mitogen_')
paths = [os.path.expandvars(os.path.expanduser(p))
for p in candidate_temp_dirs]
paths.extend(tempfile._candidate_tempdir_list())
# This must be reinstalled in forked children too, since the Broker
# instance from the parent process does not carry over to the new child.
mitogen.core.listen(econtext.broker, 'shutdown', _on_broker_shutdown)
for path in paths:
if is_good_temp_dir(path):
LOG.debug('Selected temp directory: %r (from %r)', path, paths)
return path
raise IOError(MAKE_TEMP_FAILED_MSG % {
'paths': '\n '.join(paths),
})
@mitogen.core.takes_econtext
def init_child(econtext, log_level):
def init_child(econtext, log_level, candidate_temp_dirs):
"""
Called by ContextService immediately after connection; arranges for the
(presently) spotless Python interpreter to be forked, where the newly
@ -215,6 +297,9 @@ def init_child(econtext, log_level):
:param int log_level:
Logging package level active in the master.
:param list[str] candidate_temp_dirs:
List of $variable-expanded and tilde-expanded directory names to add to
candidate list of temporary directories.
:returns:
Dict like::
@ -228,20 +313,23 @@ def init_child(econtext, log_level):
the controller will use to start forked jobs, and `home_dir` is the
home directory for the active user account.
"""
global _fork_parent
mitogen.parent.upgrade_router(econtext)
_fork_parent = econtext.router.fork()
reset_temp_dir(econtext)
# Copying the master's log level causes log messages to be filtered before
# they reach LogForwarder, thus reducing an influx of tiny messges waking
# the connection multiplexer process in the master.
LOG.setLevel(log_level)
logging.getLogger('ansible_mitogen').setLevel(log_level)
global _fork_parent
mitogen.parent.upgrade_router(econtext)
_fork_parent = econtext.router.fork()
global good_temp_dir
good_temp_dir = find_good_temp_dir(candidate_temp_dirs)
return {
'fork_context': _fork_parent,
'home_dir': mitogen.core.to_text(os.path.expanduser('~')),
'good_temp_dir': good_temp_dir,
}
@ -254,7 +342,6 @@ def create_fork_child(econtext):
"""
mitogen.parent.upgrade_router(econtext)
context = econtext.router.fork()
context.call(reset_temp_dir)
LOG.debug('create_fork_child() -> %r', context)
return context
@ -406,27 +493,6 @@ def run_module_async(kwargs, job_id, timeout_secs, econtext):
arunner.run()
def make_temp_directory(base_dir):
"""
Handle creation of `base_dir` if it is absent, in addition to a unique
temporary directory within `base_dir`. This is the temporary directory that
becomes 'remote_tmp', not the one used by Ansiballz. It always uses the
system temporary directory.
:returns:
Newly created temporary directory.
"""
# issue #301: remote_tmp may contain $vars.
base_dir = os.path.expandvars(base_dir)
if not os.path.exists(base_dir):
os.makedirs(base_dir, mode=int('0700', 8))
return tempfile.mkdtemp(
dir=base_dir,
prefix='ansible-mitogen-tmp-',
)
def get_user_shell():
"""
For commands executed directly via an SSH command-line, SSH looks up the

@ -3,7 +3,7 @@ ansible==2.6.1
coverage==4.5.1
Django==1.6.11 # Last version supporting 2.6.
mock==2.0.0
pytz==2012d # Last 2.6-compat version.
pytz==2018.5
paramiko==2.3.2 # Last 2.6-compat version.
pytest-catchlog==1.2.2
pytest==3.1.2

@ -78,9 +78,27 @@ Installation
deploy = (ALL) NOPASSWD:/usr/bin/python -c*
5. Subscribe to the `mitogen-announce mailing list
<https://www.freelists.org/list/mitogen-announce>`_ to stay updated with new
releases and important bug fixes.
5.
.. raw:: html
<form action="https://www.freelists.org/cgi-bin/subscription.cgi" method="post">
Releases occur frequently and often include important fixes. Subscribe
to the <a
href="https://www.freelists.org/list/mitogen-announce">mitogen-announce
mailing list</a> be notified of new releases.
<p>
<input type="email" placeholder="E-mail Address" name="email" style="font-size: 105%;">
<input type=hidden name="list" value="mitogen-announce">
<!-- <input type=hidden name="url_or_message" value="https://mitogen.readthedocs.io/en/stable/ansible.html#installation">-->
<input type="hidden" name="action" value="subscribe">
<button type="submit" style="font-size: 105%;">
Subscribe
</button>
</p>
</form>
Demo
@ -116,6 +134,7 @@ Testimonials
strategy took Clojars' Ansible runs from **14 minutes to 2 minutes**. I still
can't quite believe it."
* "Enabling the mitogen plugin in ansible feels like switching from floppy to SSD"
.. _noteworthy_differences:
@ -123,7 +142,7 @@ Testimonials
Noteworthy Differences
----------------------
* Ansible 2.3-2.5 are supported along with Python 2.6, 2.7 or 3.6. Verify your
* Ansible 2.3-2.7 are supported along with Python 2.6, 2.7 or 3.6. Verify your
installation is running one of these versions by checking ``ansible
--version`` output.
@ -136,6 +155,7 @@ Noteworthy Differences
* The `docker <https://docs.ansible.com/ansible/2.6/plugins/connection/docker.html>`_,
`jail <https://docs.ansible.com/ansible/2.6/plugins/connection/jail.html>`_,
`kubectl <https://docs.ansible.com/ansible/2.6/plugins/connection/kubectl.html>`_,
`local <https://docs.ansible.com/ansible/2.6/plugins/connection/local.html>`_,
`lxc <https://docs.ansible.com/ansible/2.6/plugins/connection/lxc.html>`_,
`lxd <https://docs.ansible.com/ansible/2.6/plugins/connection/lxd.html>`_,
@ -270,8 +290,7 @@ command line, or as host and group variables.
File Transfer
~~~~~~~~~~~~~
Normally `sftp <https://linux.die.net/man/1/sftp>`_ or
`scp <https://linux.die.net/man/1/scp>`_ are used to copy files by the
Normally `sftp(1)`_ or `scp(1)`_ are used to copy files by the
`assemble <http://docs.ansible.com/ansible/latest/modules/assemble_module.html>`_,
`copy <http://docs.ansible.com/ansible/latest/modules/copy_module.html>`_,
`patch <http://docs.ansible.com/ansible/latest/modules/patch_module.html>`_,
@ -282,6 +301,9 @@ actions, or when uploading modules with pipelining disabled. With Mitogen
copies are implemented natively using the same interpreters, connection tree,
and routed message bus that carries RPCs.
.. _scp(1): https://linux.die.net/man/1/scp
.. _sftp(1): https://linux.die.net/man/1/sftp
This permits direct streaming between endpoints regardless of execution
environment, without necessitating temporary copies in intermediary accounts or
machines, for example when ``become`` is active, or in the presence of
@ -301,8 +323,7 @@ to rename over any existing file. This ensures the file remains consistent at
all times, in the event of a crash, or when overlapping `ansible-playbook` runs
deploy differing file contents.
The `sftp <https://linux.die.net/man/1/sftp>`_ and `scp
<https://linux.die.net/man/1/sftp>`_ tools may cause undetected data corruption
The `sftp(1)`_ and `scp(1)`_ tools may cause undetected data corruption
in the form of truncated files, or files containing intermingled data segments
from overlapping runs. As part of normal operation, both tools expose a window
where readers may observe inconsistent file contents.
@ -311,10 +332,11 @@ where readers may observe inconsistent file contents.
Performance
^^^^^^^^^^^
One roundtrip initiates a transfer larger than 32KiB, while smaller transfers
are embedded in the initiating RPC. For tools operating via SSH multiplexing, 4
roundtrips are required to configure the IO channel, in addition to the time to
start the local and remote processes.
One roundtrip initiates a transfer larger than 124 KiB, while smaller transfers
are embedded in a 0-roundtrip pipelined call. For tools operating via SSH
multiplexing, 4 roundtrips are required to configure the IO channel, followed
by 6 roundtrips to transfer the file in the case of ``sftp``, in addition to
the time to start the local and remote processes.
An invocation of ``scp`` with an empty ``.profile`` over a 30 ms link takes
~140 ms, wasting 110 ms per invocation, rising to ~2,000 ms over a 400 ms
@ -400,6 +422,141 @@ this precisely, to avoid breaking playbooks that expect text to appear in
specific variables with a particular linefeed style.
.. _ansible_tempfiles:
Temporary Files
~~~~~~~~~~~~~~~
Temporary file handling in Ansible is incredibly tricky business, and the exact
behaviour varies across major releases.
Ansible creates a variety of temporary files and directories depending on its
operating mode.
In the best case when pipelining is enabled and no temporary uploads are
required, for each task Ansible will create one directory below a
system-supplied temporary directory returned by :func:`tempfile.mkdtemp`, owned
by the target account a new-style module will execute in.
In other cases depending on the task type, whether become is active, whether
the target become user is privileged, whether the associated action plugin
needs to upload files, and whether the associated module needs to store files,
Ansible may:
* Create a directory owned by the SSH user either under ``remote_tmp``, or a
system-default directory,
* Upload action dependencies such as non-new style modules or rendered
templates to that directory via `sftp(1)`_ or `scp(1)`_.
* Attempt to modify the directory's access control list to grant access to the
target user using `setfacl(1) <https://linux.die.net/man/1/setfacl>`_,
requiring that tool to be installed and a supported filesystem to be in use,
or for the ``allow_world_readable_tmpfiles`` setting to be :data:`True`.
* Create a directory owned by the target user either under ``remote_tmp``, or
a system-default directory, if a new-style module needs a temporary directory
and one was not previously created for a supporting file earlier in the
invocation.
In summary, for each task Ansible may create one or more of:
* ``~ssh_user/<remote_tmp>/...`` owned by the login user,
* ``$TMPDIR/ansible-tmp-...`` owned by the login user,
* ``$TMPDIR/ansible-tmp-...`` owned by the login user with ACLs permitting
write access by the become user,
* ``~become_user/<remote_tmp>/...`` owned by the become user,
* ``$TMPDIR/ansible_<modname>_payload_.../`` owned by the become user,
* ``$TMPDIR/ansible-module-tmp-.../`` owned by the become user.
Mitogen for Ansible
^^^^^^^^^^^^^^^^^^^
Temporary h
Temporary directory handling is fiddly and varies across major Ansible
releases.
Temporary directories must exist to maintain compatibility with Ansible, as
many modules introspect :data:`sys.argv` to find a directory where they may
write files, however only one directory exists for the lifetime of each
interpreter, its location is consistent for each target account, and it is
always privately owned by that account.
The paths below are tried until one is found that is writeable and lives on a
filesystem with ``noexec`` disabled:
1. ``$variable`` and tilde-expanded ``remote_tmp`` setting from
``ansible.cfg``
2. ``$variable`` and tilde-expanded ``system_tmpdirs`` setting from
``ansible.cfg``
3. ``TMPDIR`` environment variable
4. ``TEMP`` environment variable
5. ``TMP`` environment variable
6. ``/tmp``
7. ``/var/tmp``
8. ``/usr/tmp``
9. Current working directory
The directory is created once at startup, and subdirectories are automatically
created and destroyed for every new task. Management of subdirectories happens
on the controller, but management of the parent directory happens entirely on
the target.
.. _ansible_process_env:
Process Environment Emulation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Since Ansible discards processes after each module invocation, follow-up tasks
often (but not always) receive a new environment that will usually include
changes made by previous tasks. As such modifications are common, for
compatibility the extension emulates the existing behaviour as closely as
possible.
Some scenarios exist where emulation is impossible, for example, applying
``nsswitch.conf`` changes when ``nscd`` is not in use. If future scenarios
appear that cannot be solved through emulation, the extension will be updated
to automatically restart affected interpreters instead.
DNS Resolution
^^^^^^^^^^^^^^
Modifications to ``/etc/resolv.conf`` cause the glibc resolver configuration to
be reloaded via `res_init(3) <https://linux.die.net/man/3/res_init>`_. This
isn't necessary on some Linux distributions carrying glibc patches to
automatically check ``/etc/resolv.conf`` periodically, however it is necessary
on at least Debian and BSD derivatives.
``/etc/environment``
^^^^^^^^^^^^^^^^^^^^
When ``become: true`` is active or SSH multiplexing is disabled, modifications
by previous tasks to ``/etc/environment`` and ``$HOME/.pam_environment`` are
normally reflected, since the content of those files is reapplied by `PAM
<https://en.wikipedia.org/wiki/Pluggable_authentication_module>`_ via `pam_env`
on each authentication of ``sudo`` or ``sshd``.
Both files are monitored for changes, and changes are applied where it appears
safe to do so:
* New keys are added if they did not otherwise exist in the inherited
environment, or previously had the same value as found in the file before it
changed.
* Given a key (such as ``http_proxy``) added to the file where no such key
exists in the environment, the key will be added.
* Given a key (such as ``PATH``) where an existing environment key exists with
a different value, the update or deletion will be ignored, as it is likely
the key was overridden elsewhere after `pam_env` ran, such as by
``/etc/profile``.
* Given a key removed from the file that had the same value as the existing
environment key, the key will be removed.
How Modules Execute
~~~~~~~~~~~~~~~~~~~
@ -525,6 +682,8 @@ connection delegation is supported.
* ``ansible_user``: Name of user within the container to execute as.
.. _method-jail:
FreeBSD Jail
~~~~~~~~~~~~
@ -536,6 +695,19 @@ connection delegation is supported.
* ``ansible_user``: Name of user within the jail to execute as.
.. _method-kubectl:
Kubernetes Pod
~~~~~~~~~~~~~~
Like `kubectl
<https://docs.ansible.com/ansible/2.6/plugins/connection/kubectl.html>`_ except
connection delegation is supported.
* ``ansible_host``: Name of pod (default: inventory hostname).
* ``ansible_user``: Name of user to authenticate to API as.
Local
~~~~~
@ -568,10 +740,10 @@ additional differences exist that may break existing playbooks.
LXC
~~~
Like `lxc <https://docs.ansible.com/ansible/2.6/plugins/connection/lxc.html>`_
and `lxd <https://docs.ansible.com/ansible/2.6/plugins/connection/lxd.html>`_
except connection delegation is supported, and ``lxc-attach`` is always used
rather than the LXC Python bindings, as is usual with ``lxc``.
Connect to classic LXC containers, like `lxc
<https://docs.ansible.com/ansible/2.6/plugins/connection/lxc.html>`_ except
connection delegation is supported, and ``lxc-attach`` is always used rather
than the LXC Python bindings, as is usual with ``lxc``.
The ``lxc-attach`` command must be available on the host machine.
@ -579,6 +751,20 @@ The ``lxc-attach`` command must be available on the host machine.
* ``ansible_host``: Name of LXC container (default: inventory hostname).
.. _method-lxd:
LXD
~~~
Connect to modern LXD containers, like `lxd
<https://docs.ansible.com/ansible/2.6/plugins/connection/lxd.html>`_ except
connection delegation is supported. The ``lxc`` command must be available on
the host machine.
* ``ansible_python_interpreter``
* ``ansible_host``: Name of LXC container (default: inventory hostname).
.. _machinectl:
Machinectl
@ -601,21 +787,23 @@ Setns
~~~~~
The ``setns`` method connects to Linux containers via `setns(2)
<https://linux.die.net/man/2/setns>`_. Unlike :ref:`method-docker` and
:ref:`method-lxc` the namespace transition is handled internally, ensuring
optimal throughput to the child. This is necessary for :ref:`machinectl` where
only PTY channels are supported.
<https://linux.die.net/man/2/setns>`_. Unlike :ref:`method-docker`,
:ref:`method-lxc`, and :ref:`method-lxd` the namespace transition is handled
internally, ensuring optimal throughput to the child. This is necessary for
:ref:`machinectl` where only PTY channels are supported.
A utility program must be installed to discover the PID of the container's root
process.
* ``mitogen_kind``: one of ``docker``, ``lxc`` or ``machinectl``.
* ``mitogen_kind``: one of ``docker``, ``lxc``, ``lxd`` or ``machinectl``.
* ``ansible_host``: Name of container as it is known to the corresponding tool
(default: inventory hostname).
* ``ansible_user``: Name of user within the container to execute as.
* ``mitogen_docker_path``: path to Docker if not available on the system path.
* ``mitogen_lxc_info_path``: path to ``lxc-info`` command if not available as
``/usr/bin/lxc-info``.
* ``mitogen_lxc_path``: path to LXD's ``lxc`` command if not available as
``lxc-info``.
* ``mitogen_lxc_info_path``: path to LXC classic's ``lxc-info`` command if not
available as ``lxc-info``.
* ``mitogen_machinectl_path``: path to ``machinectl`` command if not available
as ``/bin/machinectl``.
@ -692,25 +880,45 @@ except connection delegation is supported.
Debugging
---------
Diagnostics and use of the :py:mod:`logging` package output on the target
machine are usually discarded. With Mitogen, all of this is captured and
returned to the controller, where it can be viewed as desired with ``-vvv``.
Basic high level logs are produced with ``-vvv``, with logging of all IO on the
controller with ``-vvvv`` or higher.
Although use of standard IO and the logging package on the target is forwarded
to the controller, it is not possible to receive IO activity logs, as the
process of receiving those logs would would itself generate IO activity. To
receive a complete trace of every process on every machine, file-based logging
is necessary. File-based logging can be enabled by setting
``MITOGEN_ROUTER_DEBUG=1`` in your environment.
When file-based logging is enabled, one file per context will be created on the
local machine and every target machine, as ``/tmp/mitogen.<pid>.log``.
If you are experiencing a hang, ``MITOGEN_DUMP_THREAD_STACKS=1`` causes every
process on every machine to dump every thread stack into the logging framework
every 5 seconds.
Diagnostics and :py:mod:`logging` package output on targets are usually
discarded. With Mitogen, these are captured and forwarded to the controller
where they can be viewed with ``-vvv``. Basic high level logs are produced with
``-vvv``, with logging of all IO on the controller with ``-vvvv`` or higher.
While uncaptured standard IO and the logging package on targets is forwarded,
it is not possible to receive IO activity logs, as the forwarding process would
would itself generate additional IO.
To receive a complete trace of every process on every machine, file-based
logging is necessary. File-based logging can be enabled by setting
``MITOGEN_ROUTER_DEBUG=1`` in your environment. When file-based logging is
enabled, one file per context will be created on the local machine and every
target machine, as ``/tmp/mitogen.<pid>.log``.
.. _diagnosing-hangs:
Diagnosing Hangs
~~~~~~~~~~~~~~~~
If you encounter a hang, the ``MITOGEN_DUMP_THREAD_STACKS=<secs>`` environment
variable arranges for each process on each machine to dump each thread stack
into the logging framework every `secs` seconds, which is visible when running
with ``-vvv``.
However, certain controller hangs may render ``MITOGEN_DUMP_THREAD_STACKS``
ineffective, or occur too infrequently for interactive reproduction. In these
cases `faulthandler <https://faulthandler.readthedocs.io/>`_ may be used:
1. For Python 2, ``pip install faulthandler``. This is unnecessary on Python 3.
2. Once the hang occurs, observe the process tree using ``pstree`` or ``ps
--forest``.
3. The most likely process to be hung is the connection multiplexer, which can
easily be identified as the parent of all SSH client processes.
4. Send ``kill -SEGV <pid>`` to the multiplexer PID, causing it to print all
thread stacks.
5. `File a bug <https://github.com/dw/mitogen/issues/new/>`_ including a copy
of the stacks, along with a description of the last task executing prior to
the hang.
Getting Help

File diff suppressed because it is too large Load Diff

@ -15,14 +15,232 @@ Release Notes
</style>
.. comment
v0.2.3 (2018-10-23)
-------------------
Mitogen for Ansible
~~~~~~~~~~~~~~~~~~~
Enhancements
^^^^^^^^^^^^
* `#315 <https://github.com/dw/mitogen/pull/315>`_,
`#392 <https://github.com/dw/mitogen/issues/392>`_: Ansible 2.6 and 2.7 are
supported.
* `#321 <https://github.com/dw/mitogen/issues/321>`_,
`#336 <https://github.com/dw/mitogen/issues/336>`_: temporary file handling
was simplified, undoing earlier damage caused by compatibility fixes,
improving 2.6 compatibility, and avoiding two network roundtrips for every
related action
(`assemble <http://docs.ansible.com/ansible/latest/modules/assemble_module.html>`_,
`aws_s3 <http://docs.ansible.com/ansible/latest/modules/aws_s3_module.html>`_,
`copy <http://docs.ansible.com/ansible/latest/modules/copy_module.html>`_,
`patch <http://docs.ansible.com/ansible/latest/modules/patch_module.html>`_,
`script <http://docs.ansible.com/ansible/latest/modules/script_module.html>`_,
`template <http://docs.ansible.com/ansible/latest/modules/template_module.html>`_,
`unarchive <http://docs.ansible.com/ansible/latest/modules/unarchive_module.html>`_,
`uri <http://docs.ansible.com/ansible/latest/modules/uri_module.html>`_). See
:ref:`ansible_tempfiles` for a complete description.
* `#376 <https://github.com/dw/mitogen/pull/376>`_,
`#377 <https://github.com/dw/mitogen/pull/377>`_: the ``kubectl`` connection
type is now supported. Contributed by Yannig Perré.
* `084c0ac0 <https://github.com/dw/mitogen/commit/084c0ac0>`_: avoid a
roundtrip in
`copy <http://docs.ansible.com/ansible/latest/modules/copy_module.html>`_ and
`template <http://docs.ansible.com/ansible/latest/modules/template_module.html>`_
due to an unfortunate default.
* `7458dfae <https://github.com/dw/mitogen/commit/7458dfae>`_: avoid a
roundtrip when transferring files smaller than 124KiB. Copy and template
actions are now 2-RTT, reducing runtime for a 20-iteration template loop over
a 250 ms link from 30 seconds to 10 seconds compared to v0.2.2, down from 120
seconds compared to vanilla.
* `#337 <https://github.com/dw/mitogen/issues/337>`_: To avoid a scaling
limitation, a PTY is no longer allocated for an SSH connection unless the
configuration specifies a password.
* `d62e6e2a <https://github.com/dw/mitogen/commit/d62e6e2a>`_: many-target
runs executed the dependency scanner redundantly due to missing
synchronization, wasting significant runtime in the connection multiplexer.
In one case work was reduced by 95%, which may manifest as faster runs.
* `5189408e <https://github.com/dw/mitogen/commit/5189408e>`_: threads are
cooperatively scheduled, minimizing `GIL
<https://en.wikipedia.org/wiki/Global_interpreter_lock>`_ contention, and
reducing context switching by around 90%. This manifests as an overall
improvement, but is easily noticeable on short many-target runs, where
startup overhead dominates runtime.
* The `faulthandler <https://faulthandler.readthedocs.io/>`_ module is
automatically activated if it is installed, simplifying debugging of hangs.
See :ref:`diagnosing-hangs` for details.
* The ``MITOGEN_DUMP_THREAD_STACKS`` environment variable's value now indicates
the number of seconds between stack dumps. See :ref:`diagnosing-hangs` for
details.
Fixes
^^^^^
* `#251 <https://github.com/dw/mitogen/issues/251>`_,
`#340 <https://github.com/dw/mitogen/issues/340>`_: Connection Delegation
could establish connections to the wrong target when ``delegate_to:`` is
present.
* `#291 <https://github.com/dw/mitogen/issues/291>`_: when Mitogen had
previously been installed using ``pip`` or ``setuptools``, the globally
installed version could conflict with a newer version bundled with an
extension that had been installed using the documented steps. Now the bundled
library always overrides over any system-installed copy.
* `#324 <https://github.com/dw/mitogen/issues/324>`_: plays with a
`custom module_utils <https://docs.ansible.com/ansible/latest/reference_appendices/config.html#default-module-utils-path>`_
would fail due to fallout from the Python 3 port and related tests being
disabled.
* `#331 <https://github.com/dw/mitogen/issues/331>`_: the connection
multiplexer subprocess always exits before the main Ansible process, ensuring
logs generated by it do not overwrite the user's prompt when ``-vvv`` is
enabled.
* `#332 <https://github.com/dw/mitogen/issues/332>`_: support a new
:func:`sys.excepthook`-based module exit mechanism added in Ansible 2.6.
* `#338 <https://github.com/dw/mitogen/issues/338>`_: compatibility: changes to
``/etc/environment`` and ``~/.pam_environment`` made by a task are reflected
in the runtime environment of subsequent tasks. See
:ref:`ansible_process_env` for a complete description.
* `#343 <https://github.com/dw/mitogen/issues/343>`_: the sudo ``--login``
option is supported.
* `#344 <https://github.com/dw/mitogen/issues/344>`_: connections no longer
fail when the controller's login username contains slashes.
* `#345 <https://github.com/dw/mitogen/issues/345>`_: the ``IdentitiesOnly
yes`` option is no longer supplied to OpenSSH by default, better matching
Ansible's behaviour.
* `#355 <https://github.com/dw/mitogen/issues/355>`_: tasks configured to run
in an isolated forked subprocess were forked from the wrong parent context.
This meant built-in modules overridden via a custom ``module_utils`` search
path may not have had any effect.
* `#362 <https://github.com/dw/mitogen/issues/362>`_: to work around a slow
algorithm in the :mod:`subprocess` module, the maximum number of open files
in processes running on the target is capped to 512, reducing the work
required to start a subprocess by >2000x in default CentOS configurations.
* `#397 <https://github.com/dw/mitogen/issues/397>`_: recent Mitogen master
versions could fail to clean up temporary directories in a number of
circumstances, and newer Ansibles moved to using :mod:`atexit` to effect
temporary directory cleanup in some circumstances.
* `b9112a9c <https://github.com/dw/mitogen/commit/b9112a9c>`_,
`2c287801 <https://github.com/dw/mitogen/commit/2c287801>`_: OpenSSH 7.5
permission denied prompts are now recognized. Contributed by Alex Willmer.
* A missing check caused an exception traceback to appear when using the
``ansible`` command-line tool with a missing or misspelled module name.
* Ansible since >=2.7 began importing :mod:`__main__` from
:mod:`ansible.module_utils.basic`, causing an error during execution, due to
the controller being configured to refuse network imports outside the
``ansible.*`` namespace. Update the target implementation to construct a stub
:mod:`__main__` module to satisfy the otherwise seemingly vestigial import.
Core Library
~~~~~~~~~~~~
* A new :class:`mitogen.parent.CallChain` class abstracts safe pipelining of
related function calls to a target context, cancelling the chain if an
exception occurs.
* `#305 <https://github.com/dw/mitogen/issues/305>`_: fix a long-standing minor
race relating to the logging framework, where *no route for Message..*
would frequently appear during startup.
* `#313 <https://github.com/dw/mitogen/issues/313>`_:
:meth:`mitogen.parent.Context.call` was documented as capable of accepting
static methods. While possible on Python 2.x the result is ugly, and in every
case it should be trivial to replace with a classmethod. The documentation
was fixed.
* `#337 <https://github.com/dw/mitogen/issues/337>`_: to avoid a scaling
limitation, a PTY is no longer allocated for each OpenSSH client if it can be
avoided. PTYs are only allocated if a password is supplied, or when
`host_key_checking=accept`. This is since Linux has a default of 4096 PTYs
(``kernel.pty.max``), while OS X has a default of 127 and an absolute maximum
of 999 (``kern.tty.ptmx_max``).
* `#339 <https://github.com/dw/mitogen/issues/339>`_: the LXD connection method
was erroneously executing LXC Classic commands.
* `#345 <https://github.com/dw/mitogen/issues/345>`_: the SSH connection method
allows optionally disabling ``IdentitiesOnly yes``.
* `#356 <https://github.com/dw/mitogen/issues/356>`_: if the master Python
process does not have :data:`sys.executable` set, the default Python
interpreter used for new children on the local machine defaults to
``"/usr/bin/python"``.
* `#366 <https://github.com/dw/mitogen/issues/366>`_,
`#380 <https://github.com/dw/mitogen/issues/380>`_: attempts by children to
import :mod:`__main__` where the main program module lacks an execution guard
are refused, and an error is logged. This prevents a common and highly
confusing error when prototyping new scripts.
v0.2.3 (2018-07-??)
-------------------
* `#371 <https://github.com/dw/mitogen/pull/371>`_: the LXC connection method
uses a more compatible method to establish an non-interactive session.
Contributed by Brian Candler.
* `#315 <https://github.com/dw/mitogen/pull/315>`_: Mitogen for Ansible is
supported under Ansible 2.6. Contributed by `Dan Quackenbush
<https://github.com/danquack>`_.
* `af2ded66 <https://github.com/dw/mitogen/commit/af2ded66>`_: add
:func:`mitogen.fork.on_fork` to allow non-Mitogen managed process forks to
clean up Mitogen resources in the child.
* `d6784242 <https://github.com/dw/mitogen/commit/d6784242>`_: the setns method
always resets ``HOME``, ``SHELL``, ``LOGNAME`` and ``USER`` environment
variables to an account in the target container, defaulting to ``root``.
* `830966bf <https://github.com/dw/mitogen/commit/830966bf>`_: the UNIX
listener no longer crashes if the peer process disappears in the middle of
connection setup.
Thanks!
~~~~~~~
Mitogen would not be possible without the support of users. A huge thanks for
bug reports, features and fixes in this release contributed by
`Alex Russu <https://github.com/alexrussu>`_,
`Alex Willmer <https://github.com/moreati>`_,
`atoom <https://github.com/atoom>`_,
`Berend De Schouwer <https://github.com/berenddeschouwer>`_,
`Brian Candler <https://github.com/candlerb>`_,
`Dan Quackenbush <https://github.com/danquack>`_,
`dsgnr <https://github.com/dsgnr>`_,
`Jesse London <https://github.com/jesteria>`_,
`John McGrath <https://github.com/jmcgrath207>`_,
`Jonathan Rosser <https://github.com/jrosser>`_,
`Josh Smift <https://github.com/jbscare>`_,
`Luca Nunzi <https://github.com/0xlc>`_,
`Orion Poplawski <https://github.com/opoplawski>`_,
`Peter V. Saveliev <https://github.com/svinota>`_,
`Pierre-Henry Muller <https://github.com/pierrehenrymuller>`_,
`Pierre-Louis Bonicoli <https://github.com/jesteria>`_,
`Prateek Jain <https://github.com/prateekj201>`_,
`RedheatWei <https://github.com/RedheatWei>`_,
`Rick Box <https://github.com/boxrick>`_,
`nikitakazantsev12 <https://github.com/nikitakazantsev12>`_,
`Tawana Musewe <https://github.com/tbtmuse>`_,
`Timo Beckers <https://github.com/ti-mo>`_, and
`Yannig Perré <https://github.com/yannig>`_.
v0.2.2 (2018-07-26)
@ -90,6 +308,9 @@ Core Library
could spuriously wake up due to ignoring an error bit set on events returned
by the kernel, manifesting as a failure to read from an unrelated descriptor.
* `#342 <https://github.com/dw/mitogen/issues/342>`_: The ``network_cli``
connection type would fail due to a missing internal SSH plugin method.
* Standard IO forwarding accidentally configured the replacement ``stdout`` and
``stderr`` write descriptors as non-blocking, causing subprocesses that
generate more output than kernel buffer space existed to throw errors. The
@ -116,12 +337,13 @@ the bug reports and pull requests in this release contributed by
`Colin McCarthy <https://github.com/colin-mccarthy>`_,
`Dan Quackenbush <https://github.com/danquack>`_,
`Duane Zamrok <https://github.com/dewthefifth>`_,
`falbanese <https://github.com/falbanese>`_,
`Gonzalo Servat <https://github.com/gservat>`_,
`Guy Knights <https://github.com/knightsg>`_,
`Josh Smift <https://github.com/jbscare>`_,
`Mark Janssen <https://github.com/sigio>`_,
`Mike Walker <https://github.com/napkindrawing>`_,
`Orion Poplawski <https://github.com/opoplawski>`_,
`falbanese <https://github.com/falbanese>`_,
`Tawana Musewe <https://github.com/tbtmuse>`_, and
`Zach Swanson <https://github.com/zswanson>`_.
@ -166,7 +388,7 @@ within a stable series.
Mitogen for Ansible
~~~~~~~~~~~~~~~~~~~
* Support for Ansible 2.3 - 2.5.x and any mixture of Python 2.6, 2.7 or 3.6 on
* Support for Ansible 2.3 - 2.7.x and any mixture of Python 2.6, 2.7 or 3.6 on
controller and target nodes.
* Drop-in support for many Ansible connection types.
@ -198,15 +420,18 @@ Mitogen for Ansible
- initech_app
- y2k_fix
* When running with ``-vvv``, log messages such as *mitogen: Router(Broker(0x7f5a48921590)): no route
for Message(..., 102, ...), my ID is ...* may be visible. These are due to a
minor race while initializing logging and can be ignored.
.. * When running with ``-vvv``, log messages will be printed to the console
*after* the Ansible run completes, as connection multiplexer shutdown only
begins after Ansible exits. This is due to a lack of suitable shutdown hook
in Ansible, and is fairly harmless, albeit cosmetically annoying. A future
release may include a solution.
* When running with ``-vvv``, log messages will be printed to the console
*after* the Ansible run completes, as connection multiplexer shutdown only
begins after Ansible exits. This is due to a lack of suitable shutdown hook
in Ansible, and is fairly harmless, albeit cosmetically annoying. A future
release may include a solution.
.. * Configurations will break that rely on the `hashbang argument splitting
behaviour <https://github.com/ansible/ansible/issues/15635>`_ of the
``ansible_python_interpreter`` setting, contrary to the Ansible
documentation. This will be addressed in a future 0.2 release.
* The Ansible 2.7 ``reboot`` module is not yet supported.
* Performance does not scale linearly with target count. This requires
significant additional work, as major bottlenecks exist in the surrounding
@ -235,11 +460,6 @@ Mitogen for Ansible
actions, such as the ``synchronize`` module. This will be addressed in the
0.3 series.
* Configurations will break that rely on the `hashbang argument splitting
behaviour <https://github.com/ansible/ansible/issues/15635>`_ of the
``ansible_python_interpreter`` setting, contrary to the Ansible
documentation. This will be addressed in a future 0.2 release.
Core Library
~~~~~~~~~~~~

@ -1,226 +0,0 @@
Mitogen Compared To
-------------------
This provides a little free-text summary of conceptual differences between
Mitogen and other tools, along with some basic perceptual metrics (project
maturity/age, quality of tests, function matrix)
Ansible
#######
Ansible_ is a complete provisioning system, Mitogen is a small component of such a system.
You should use Ansible if ...
You should not use Ansible if ...
.. _Ansible: https://docs.ansible.com/ansible/latest/index.html
.. _ansible.src: https://github.com/ansible/ansible/
Baker
#####
Baker_ lets you easily add a command line interface to your Python
functions using a simple decorator, to create scripts with "sub-commands",
similar to Django's ``manage.py``, ``svn``, ``hg``, etc.
- Unmaintained since 2015
- No obvious remote execution functionality
.. _Baker: https://bitbucket.org/mchaput/baker
Chopsticks
##########
Chopsticks_ also supports recursion! but the recursively executed instance has no special knowledge of its identity in a tree structure, and little support for functions running in the master to directly invoke functions in a recursive context.. effectively each recursion produces a new master, from which function calls must be made.
executing functions from __main__ entails picking just that function and deps
out of the main module, not transferring the module intact. that approach works
but it's much messier than just arranging for __main__ to be imported and
executed through the import mechanism.
supports sudo but no support for require_tty or typing a sudo password. also supports SSH and Docker.
good set of tests
real PEP-302 module loader, but doesn't try to cope with master also relying on
a PEP-302 module loader (e.g. py2exe).
Based on the tox configuration Python 2.7, and 3.3 to 3.6 are supported.
I/O multiplexer in the master, but not in children.
As with Execnet it includes its own serialization - pencode_ supports
- most Python primitive types (``bytes``/``str``/``unicode``, ``list``, ``tuple`` ...)
- identity references
- self referencing (recursive) data srtuctures
pencode lacks support for arbitrary classes. Byte strings require special
treatment if they contain non-ascii characters. Some primitive types
(e.g. ``complex``) are not handled. This would be straightforwar to address.
Values are length-prefixed with a 32 bit unsigned integer, meaning values
are limited to 4 billion bytes or items in length.
design is reminiscent of Mitogen in places (Tunnel is practically identical to
Mitogen's Stream), and closer to Execnet elsewhere (lack of uniformity,
tendency to prefer logic expressed in if/else special case soup rather than the
type system, though some of that is due to supporting Python 3, so not judging
too harshly!)
Chopsticks has its own `Chopsticks vs`_ comparisons.
You should use Chopsticks if you need Python 3 support.
.. _Chopsticks: https://chopsticks.readthedocs.io/en/stable/
.. _Chopsticks.src: https://github.com/lordmauve/chopsticks/
.. _Chopsticks vs: https://chopsticks.readthedocs.io/en/stable/intro.html#chopsticks-vs
.. _pencode: https://github.com/lordmauve/chopsticks/blob/master/doc/pencode.rst
.. _pencode.src: https://github.com/lordmauve/chopsticks/blob/master/chopsticks/pencode.py
Disco
#####
Disco_ is a lightweight, open-source framework for distributed computing
based on the MapReduce paradigm.
- An Erlang core, with Python bindings
- Wire format is pickle, according to `Execnet vs NLTK for distributed NLTK`_
.. _Disco: http://discoproject.org/
.. _Execnet vs NLTK for distributed NLTK: https://streamhacker.com/2009/12/14/execnet-disco-distributed-nltk/
Execnet
#######
Execnet_
- Parent and children may use threads, gevent, or eventlet, Mitogen only supports threads.
- No recursion
- Similar Channel abstraction but better developed.. includes waiting for remote to close its end
- Heavier emphasis on passing chunks of Python source code around, modules are loaded one-at-a-time with no dependency resolution mechanism
- Built-in unidirectional rsync-alike, compared to Mitogen's SSH emulation which allows use of real rsync in any supported mode
- no support for sudo, but supports connecting to vagrant
- works with read-only filesystem
- includes its own serialization_ independent of the standard library
The obj and all contained objects must be of a builtin python type
(so nested dicts, sets, etc. are all ok but not user-level instances).
- Known uses include `pytest-xdist`_, and `Distributed NLTK`_
You should use Execnet if you value code maturity more than featureset.
.. _Execnet: https://codespeak.net/execnet/
.. _serialization: https://codespeak.net/execnet/basics.html#dumps-loads
.. _pytest-xdist: https://pypi.python.org/pypi/pytest-xdist
.. _Distributed NLTK: https://streamhacker.com/2009/12/14/execnet-disco-distributed-nltk/
Fabric
######
Fabric_ allows execution of shell snippets on remote machines, Python functions run
locally, any remote interaction is fundamentally done via shell, with all the
limitations that entails. prefers to depend on SSH features (e.g. tunnelling)
than reinvent them
You should use Fabric if you enjoy being woken at 4am to pages about broken
shell snippets.
.. _fabric: http://www.fabfile.org/
Invoke
######
Invoke_
Python 2.6+, 3.3+
Basically a Fabric-alike
.. _invoke: http://www.pyinvoke.org/
Multiprocessing
###############
multiprocessing_ was added to the stdlib in Python 2.6.
multiprocessing is a package that supports spawning processes using an
API similar to the threading module. The multiprocessing package offers
both local and remote concurrency
There is a backport_ for Python 2.4 & 2.5, but it is not pure Python.
pymultiprocessing_ appears to be a pure Python implementation.
An ecosystem_ of packages has built up around multiprocessing.
The `programming guidelines`_ section notes
- Arguments to proxies must be picklable. On Windows this also applies to
``multiprocessing.Process.__init__()`` arguments.
- Callers should beware replacing ``sys.stdin``, because
``multiprocessing.Process._bootstrap()``
will close it and open /dev/null instead
.. _programming guidelines: https://docs.python.org/2/library/multiprocessing.html#programming-guidelines
.. _backport: https://pypi.python.org/pypi/multiprocessing
.. _pymultiprocessing: https://pypi.python.org/pypi/pymultiprocessing
.. _ecosystem: https://pypi.python.org/pypi?%3Aaction=search&term=multiprocessing&submit=search
Paver
#####
Paver_
More or less another task execution framework / make-alike, doesn't really deal
with remote execution at all.
.. _Paver: https://github.com/paver/paver/
Plumbum
#######
Plumbum_
Shell-only
Basically syntax sugar for running shell commands. Nicer than raw shell
(depending on your opinions of operating overloading), but it's still shell.
.. _Plumbum: https://pypi.python.org/pypi/plumbum
Pyro4
#####
Pyro4_
...
.. _Pyro4: https://pythonhosted.org/Pyro4/
RPyC
####
RPyC_
- supports transparent object proxies similar to Pyro (with all the pain and suffering hidden network IO entails)
- significantly more 'frameworkey' feel
- runs multiplexer in a thread too?
- bootstrap over SSH only, no recursion and no sudo
- requires a writable filesystem
.. _RPyC: https://rpyc.readthedocs.io/en/latest/
Salt
####
Salt_
- no crappy deps
You should use Salt if you enjoy firefighting endless implementation bugs,
otherwise you should prefer Ansible.
.. _Salt: https://docs.saltstack.com/en/latest/topics/
.. _Salt.src: https://github.com/saltstack/salt

@ -19,7 +19,7 @@ html_theme_options = {
'head_font_family': "Georgia, serif",
}
htmlhelp_basename = 'mitogendoc'
intersphinx_mapping = {'python': ('https://docs.python.org/2', None)}
intersphinx_mapping = {'python': ('https://docs.python.org/3', None)}
language = None
master_doc = 'toc'
project = u'Mitogen'

@ -10,6 +10,7 @@ sponsorship and outstanding future-thinking of its early adopters.
<!--
.. image:: images/sponsors/cgi.svg
.. image:: images/sponsors/grx.svg
.. image:: images/sponsors/securelink.svg
.. image:: images/sponsors/seantis.svg
.. raw:: html
@ -49,7 +50,19 @@ sponsorship and outstanding future-thinking of its early adopters.
<table border="0" width="100%">
<tr>
<td width="160" style="padding: 12px; text-align: center;">
<a href="https://www.seantis.ch"
<a href="https://www.goodrx.com/"
><img src="_images/grx.svg" width="160"></a>
</td>
<td style="padding: 12px;" valign=middle>
GoodRx is Americas #1 prescription price transparency platform.
Join GoodRx and help consumers save up to 80% on their
medications. Apply today at <a
href="https://www.goodrx.com/jobs">www.goodrx.com/jobs</a>
</td>
</tr>
<tr>
<td width="160" style="padding: 12px; text-align: center;">
<a href="https://www.seantis.ch/"
><img src="_images/seantis.svg" width="160"></a>
</td>
<td style="padding: 12px;" valign=middle>

@ -1,3 +1,4 @@
Sphinx==1.7.1
sphinx-autobuild==0.6.0 # Last version to support Python 2.6
sphinxcontrib-programoutput==0.11
alabaster==0.7.10

@ -208,7 +208,7 @@ started the context, however as shown, this can be overridden.
Calling A Function
------------------
.. currentmodule:: mitogen.master
.. currentmodule:: mitogen.parent
Now that some contexts exist, it is time to execute code in them. Any regular
function, static method, or class method reachable directly from module scope

@ -298,8 +298,9 @@ parent and child. Integers use big endian in their encoded form.
* - `reply_to`
- 4
- Integer target handle to direct any reply to this message. Used to
receive a one-time reply, such as the return value of a function call.
:data:`IS_DEAD` has a special meaning when it appears in this field.
receive a one-time reply, such as the return value of a function call,
or to signal a special condition for the message. :ref:`See below
<reply_to_values>` for special values for this field.
* - `length`
- 4
@ -332,7 +333,7 @@ Masters listen on the following handles:
Receives the name of a module to load `fullname`, locates the source code
for `fullname`, and routes one or more :py:data:`LOAD_MODULE` messages back
towards the sender of the :py:data:`GET_MODULE` request. If lookup fails,
``None`` is sent instead.
:data:`None` is sent instead.
See :ref:`import-preloading` for a deeper discussion of
:py:data:`GET_MODULE`/:py:data:`LOAD_MODULE`.
@ -355,12 +356,13 @@ Children listen on the following handles:
Receives `(pkg_present, path, compressed, related)` tuples, composed of:
* **pkg_present**: Either ``None`` for a plain ``.py`` module, or a list of
canonical names of submodules existing witin this package. For example, a
:py:data:`LOAD_MODULE` for the :py:mod:`mitogen` package would return a
list like: `["mitogen.core", "mitogen.fakessh", "mitogen.master", ..]`.
This list is used by children to avoid generating useless round-trips due
to Python 2.x's :keyword:`import` statement behavior.
* **pkg_present**: Either :data:`None` for a plain ``.py`` module, or a
list of canonical names of submodules existing witin this package. For
example, a :py:data:`LOAD_MODULE` for the :py:mod:`mitogen` package would
return a list like: `["mitogen.core", "mitogen.fakessh",
"mitogen.master", ..]`. This list is used by children to avoid generating
useless round-trips due to Python 2.x's :keyword:`import` statement
behavior.
* **path**: Original filesystem where the module was found on the master.
* **compressed**: :py:mod:`zlib`-compressed module source code.
* **related**: list of canonical module names on which this module appears
@ -372,11 +374,16 @@ Children listen on the following handles:
.. currentmodule:: mitogen.core
.. data:: CALL_FUNCTION
Receives `(mod_name, class_name, func_name, args, kwargs)`
5-tuples from
:py:meth:`call_async() <mitogen.parent.Context.call_async>`,
imports ``mod_name``, then attempts to execute
`class_name.func_name(\*args, \**kwargs)`.
Receives `(chain_id, mod_name, class_name, func_name, args, kwargs)`
6-tuples from :class:`mitogen.parent.CallChain`, imports ``mod_name``, then
attempts to execute `class_name.func_name(\*args, \**kwargs)`.
* `chain_id`: if not :data:`None`, an identifier unique to the originating
:class:`mitogen.parent.CallChain`. When set, if an exception occurs
during a call, future calls with the same ID automatically fail with the
same exception without ever executing, and failed calls with no
`reply_to` set are not dumped to the logging framework as they otherwise
would. This is used to implement pipelining.
When this channel is closed (by way of receiving a dead message), the
child's main thread begins graceful shutdown of its own :py:class:`Broker`
@ -466,23 +473,14 @@ Non-master parents also listen on the following handles:
ensuring they are cached and deduplicated at each hop in the chain leading
to the target context.
.. _reply_to_values:
Special values for the `reply_to` field:
.. _IS_DEAD:
.. currentmodule:: mitogen.core
.. data:: IS_DEAD
Special value used to signal disconnection or the inability to route a
message, when it appears in the `reply_to` field. Usually causes
:class:`mitogen.core.ChannelError` to be raised when it is received.
It indicates the sender did not know how to process the message, or wishes
no further messages to be delivered to it. It is used when:
.. autodata:: IS_DEAD
* a remote receiver is disconnected or explicitly closed.
* a related message could not be delivered due to no route existing for it.
* a router is being torn down, as a sentinel value to notify
:py:meth:`mitogen.core.Router.add_handler` callbacks to clean up.
Additional handles are created to receive the result of every function call

@ -0,0 +1,37 @@
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@ -8,17 +8,27 @@ Internal API Reference
signals
mitogen.core
============
Constants
=========
.. currentmodule:: mitogen.core
.. autodata:: CHUNK_SIZE
Latch Class
-----------
===========
.. currentmodule:: mitogen.core
.. autoclass:: Latch
:members:
.. autoclass:: Latch ()
PidfulStreamHandler Class
=========================
.. currentmodule:: mitogen.core
.. autoclass:: PidfulStreamHandler
:members:
Side Class
@ -50,24 +60,24 @@ Side Class
.. attribute:: fd
Integer file descriptor to perform IO on, or ``None`` if
Integer file descriptor to perform IO on, or :data:`None` if
:py:meth:`close` has been called.
.. attribute:: keep_alive
If ``True``, causes presence of this side in :py:class:`Broker`'s
If :data:`True`, causes presence of this side in :py:class:`Broker`'s
active reader set to defer shutdown until the side is disconnected.
.. method:: fileno
Return :py:attr:`fd` if it is not ``None``, otherwise raise
Return :py:attr:`fd` if it is not :data:`None`, otherwise raise
:py:class:`StreamError`. This method is implemented so that
:py:class:`Side` can be used directly by :py:func:`select.select`.
.. method:: close
Call :py:func:`os.close` on :py:attr:`fd` if it is not ``None``, then
set it to ``None``.
Call :py:func:`os.close` on :py:attr:`fd` if it is not :data:`None`,
then set it to :data:`None`.
.. method:: read (n=CHUNK_SIZE)
@ -89,12 +99,9 @@ Side Class
wrapping the underlying :py:func:`os.write` call with :py:func:`io_op`
to trap common disconnection connditions.
:py:meth:`read` always behaves as if it is writing to a regular UNIX
file; socket, pipe, and TTY disconnection errors are masked and result
in a 0-sized write.
:returns:
Number of bytes written, or ``None`` if disconnection was detected.
Number of bytes written, or :data:`None` if disconnection was
detected.
Stream Classes
@ -302,123 +309,47 @@ mitogen.master
Blocking I/O Functions
----------------------
======================
These functions exist to support the blocking phase of setting up a new
context. They will eventually be replaced with asynchronous equivalents.
.. currentmodule:: mitogen.master
.. function:: iter_read(fd, deadline=None)
Return a generator that arranges for up to 4096-byte chunks to be read at a
time from the file descriptor `fd` until the generator is destroyed.
:param fd:
File descriptor to read from.
:param deadline:
If not ``None``, an absolute UNIX timestamp after which timeout should
occur.
:raises mitogen.core.TimeoutError:
Attempt to read beyond deadline.
:raises mitogen.core.StreamError:
Attempt to read past end of file.
.. currentmodule:: mitogen.master
.. function:: write_all (fd, s, deadline=None)
Arrange for all of bytestring `s` to be written to the file descriptor
`fd`.
:param int fd:
File descriptor to write to.
:param bytes s:
Bytestring to write to file descriptor.
:param float deadline:
If not ``None``, an absolute UNIX timestamp after which timeout should
occur.
:raises mitogen.core.TimeoutError:
Bytestring could not be written entirely before deadline was exceeded.
:raises mitogen.core.StreamError:
File descriptor was disconnected before write could complete.
Helper Functions
----------------
.. currentmodule:: mitogen.core
.. function:: io_op (func, \*args)
Wrap a function that may raise :py:class:`OSError`, trapping common error
codes relating to disconnection events in various subsystems:
* When performing IO against a TTY, disconnection of the remote end is
signalled by :py:data:`errno.EIO`.
* When performing IO against a socket, disconnection of the remote end is
signalled by :py:data:`errno.ECONNRESET`.
* When performing IO against a pipe, disconnection of the remote end is
signalled by :py:data:`errno.EPIPE`.
:returns:
Tuple of `(return_value, disconnected)`, where `return_value` is the
return value of `func(\*args)`, and `disconnected` is ``True`` if
disconnection was detected, otherwise ``False``.
.. currentmodule:: mitogen.parent
.. autofunction:: discard_until
.. autofunction:: iter_read
.. autofunction:: write_all
.. autofunction:: create_child
Subprocess Creation Functions
=============================
.. currentmodule:: mitogen.parent
.. autofunction:: create_child
.. autofunction:: hybrid_tty_create_child
.. autofunction:: tty_create_child
.. currentmodule:: mitogen.parent
Helper Functions
================
.. autofunction:: hybrid_tty_create_child
.. currentmodule:: mitogen.core
.. autofunction:: to_text
.. autofunction:: has_parent_authority
.. autofunction:: set_cloexec
.. autofunction:: set_nonblock
.. autofunction:: set_block
.. autofunction:: io_op
.. currentmodule:: mitogen.parent
.. autofunction:: close_nonstandard_fds
.. autofunction:: create_socketpair
.. currentmodule:: mitogen.master
.. function:: get_child_modules (path)
Return the suffixes of submodules directly neated beneath of the package
directory at `path`.
:param str path:
Path to the module's source code on disk, or some PEP-302-recognized
equivalent. Usually this is the module's ``__file__`` attribute, but
is specified explicitly to avoid loading the module.
:return:
List of submodule name suffixes.
.. autofunction:: get_child_modules
.. currentmodule:: mitogen.minify
.. autofunction:: minimize_source (source)
Remove comments and docstrings from Python `source`, preserving line
numbers and syntax of empty blocks.
:param str source:
The source to minimize.
:returns str:
The minimized source.
.. autofunction:: minimize_source
Signals

@ -19,16 +19,10 @@ functions registered to receive it will be called back.
Functions
---------
.. function:: mitogen.core.listen (obj, name, func)
Arrange for `func(\*args, \*\*kwargs)` to be invoked when the named signal
is fired by `obj`.
.. function:: mitogen.core.fire (obj, name, \*args, \*\*kwargs)
Arrange for `func(\*args, \*\*kwargs)` to be invoked for every function
registered for the named signal on `obj`.
.. currentmodule:: mitogen.core
.. autofunction:: listen
.. autofunction:: fire
List

@ -15,3 +15,8 @@ Table Of Contents
examples
internals
shame
.. toctree::
:hidden:
services

@ -33,7 +33,7 @@ be expected. On the slave, it is built dynamically during startup.
#: Library version as a tuple.
__version__ = (0, 2, 2)
__version__ = (0, 2, 3)
#: This is :data:`False` in slave contexts. Previously it was used to prevent

@ -89,6 +89,18 @@ LOAD_MODULE = 107
FORWARD_MODULE = 108
DETACHING = 109
CALL_SERVICE = 110
#: Special value used to signal disconnection or the inability to route a
#: message, when it appears in the `reply_to` field. Usually causes
#: :class:`mitogen.core.ChannelError` to be raised when it is received.
#:
#: It indicates the sender did not know how to process the message, or wishes
#: no further messages to be delivered to it. It is used when:
#:
#: * a remote receiver is disconnected or explicitly closed.
#: * a related message could not be delivered due to no route existing for it.
#: * a router is being torn down, as a sentinel value to notify
#: :py:meth:`mitogen.core.Router.add_handler` callbacks to clean up.
IS_DEAD = 999
try:
@ -116,7 +128,34 @@ AnyTextType = (BytesType, UnicodeType)
if sys.version_info < (2, 5):
next = lambda it: it.next()
#: Default size for calls to :meth:`Side.read` or :meth:`Side.write`, and the
#: size of buffers configured by :func:`mitogen.parent.create_socketpair`. This
#: value has many performance implications, 128KiB seems to be a sweet spot.
#:
#: * When set low, large messages cause many :class:`Broker` IO loop
#: iterations, burning CPU and reducing throughput.
#: * When set high, excessive RAM is reserved by the OS for socket buffers (2x
#: per child), and an identically sized temporary userspace buffer is
#: allocated on each read that requires zeroing, and over a particular size
#: may require two system calls to allocate/deallocate.
#:
#: Care must be taken to ensure the underlying kernel object and receiving
#: program support the desired size. For example,
#:
#: * Most UNIXes have TTYs with fixed 2KiB-4KiB buffers, making them unsuitable
#: for efficient IO.
#: * Different UNIXes have varying presets for pipes, which may not be
#: configurable. On recent Linux the default pipe buffer size is 64KiB, but
#: under memory pressure may be as low as 4KiB for unprivileged processes.
#: * When communication is via an intermediary process, its internal buffers
#: effect the speed OS buffers will drain. For example OpenSSH uses 64KiB
#: reads.
#:
#: An ideal :class:`Message` has a size that is a multiple of
#: :data:`CHUNK_SIZE` inclusive of headers, to avoid wasting IO loop iterations
#: writing small trailer chunks.
CHUNK_SIZE = 131072
_tls = threading.local()
@ -131,6 +170,13 @@ else:
class Error(Exception):
"""Base for all exceptions raised by Mitogen.
:param str fmt:
Exception text, or format string if `args` is non-empty.
:param tuple args:
Format string arguments.
"""
def __init__(self, fmt=None, *args):
if args:
fmt %= args
@ -140,10 +186,14 @@ class Error(Exception):
class LatchError(Error):
"""Raised when an attempt is made to use a :py:class:`mitogen.core.Latch`
that has been marked closed."""
pass
class Blob(BytesType):
"""A serializable bytes subclass whose content is summarized in repr()
output, making it suitable for logging binary data."""
def __repr__(self):
return '[blob: %d bytes]' % len(self)
@ -152,6 +202,8 @@ class Blob(BytesType):
class Secret(UnicodeType):
"""A serializable unicode subclass whose content is masked in repr()
output, making it suitable for logging passwords."""
def __repr__(self):
return '[secret]'
@ -165,6 +217,10 @@ class Secret(UnicodeType):
class Kwargs(dict):
"""A serializable dict subclass that indicates the contained keys should be
be coerced to Unicode on Python 3 as required. Python 2 produces keyword
argument dicts whose keys are bytestrings, requiring a helper to ensure
compatibility with Python 3."""
if PY3:
def __init__(self, dct):
for k, v in dct.items():
@ -181,6 +237,10 @@ class Kwargs(dict):
class CallError(Error):
"""Serializable :class:`Error` subclass raised when
:py:meth:`Context.call() <mitogen.parent.Context.call>` fails. A copy of
the traceback from the external context is appended to the exception
message."""
def __init__(self, fmt=None, *args):
if not isinstance(fmt, BaseException):
Error.__init__(self, fmt, *args)
@ -207,37 +267,54 @@ def _unpickle_call_error(s):
class ChannelError(Error):
"""Raised when a channel dies or has been closed."""
remote_msg = 'Channel closed by remote end.'
local_msg = 'Channel closed by local end.'
class StreamError(Error):
"""Raised when a stream cannot be established."""
pass
class TimeoutError(Error):
"""Raised when a timeout occurs on a stream."""
pass
def to_text(o):
if isinstance(o, UnicodeType):
return UnicodeType(o)
"""Coerce `o` to Unicode by decoding it from UTF-8 if it is an instance of
:class:`bytes`, otherwise pass it to the :class:`str` constructor. The
returned object is always a plain :class:`str`, any subclass is removed."""
if isinstance(o, BytesType):
return o.decode('utf-8')
return UnicodeType(o)
def has_parent_authority(msg, _stream=None):
"""Policy function for use with :class:`Receiver` and
:meth:`Router.add_handler` that requires incoming messages to originate
from a parent context, or on a :class:`Stream` whose :attr:`auth_id
<Stream.auth_id>` has been set to that of a parent context or the current
context."""
return (msg.auth_id == mitogen.context_id or
msg.auth_id in mitogen.parent_ids)
def listen(obj, name, func):
"""
Arrange for `func(*args, **kwargs)` to be invoked when the named signal is
fired by `obj`.
"""
signals = vars(obj).setdefault('_signals', {})
signals.setdefault(name, []).append(func)
def fire(obj, name, *args, **kwargs):
"""
Arrange for `func(*args, **kwargs)` to be invoked for every function
registered for the named signal on `obj`.
"""
signals = vars(obj).get('_signals', {})
return [func(*args, **kwargs) for func in signals.get(name, ())]
@ -253,7 +330,8 @@ def takes_router(func):
def is_blacklisted_import(importer, fullname):
"""Return ``True`` if `fullname` is part of a blacklisted package, or if
"""
Return :data:`True` if `fullname` is part of a blacklisted package, or if
any packages have been whitelisted and `fullname` is not part of one.
NB:
@ -266,22 +344,51 @@ def is_blacklisted_import(importer, fullname):
def set_cloexec(fd):
"""Set the file descriptor `fd` to automatically close on
:func:`os.execve`. This has no effect on file descriptors inherited across
:func:`os.fork`, they must be explicitly closed through some other means,
such as :func:`mitogen.fork.on_fork`."""
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
assert fd > 2
fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
def set_nonblock(fd):
"""Set the file descriptor `fd` to non-blocking mode. For most underlying
file types, this causes :func:`os.read` or :func:`os.write` to raise
:class:`OSError` with :data:`errno.EAGAIN` rather than block the thread
when the underlying kernel buffer is exhausted."""
flags = fcntl.fcntl(fd, fcntl.F_GETFL)
fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
def set_block(fd):
"""Inverse of :func:`set_nonblock`, i.e. cause `fd` to block the thread
when the underlying kernel buffer is exhausted."""
flags = fcntl.fcntl(fd, fcntl.F_GETFL)
fcntl.fcntl(fd, fcntl.F_SETFL, flags & ~os.O_NONBLOCK)
def io_op(func, *args):
"""Wrap `func(*args)` that may raise :class:`select.error`,
:class:`IOError`, or :class:`OSError`, trapping UNIX error codes relating
to disconnection and retry events in various subsystems:
* When a signal is delivered to the process on Python 2, system call retry
is signalled through :data:`errno.EINTR`. The invocation is automatically
restarted.
* When performing IO against a TTY, disconnection of the remote end is
signalled by :data:`errno.EIO`.
* When performing IO against a socket, disconnection of the remote end is
signalled by :data:`errno.ECONNRESET`.
* When performing IO against a pipe, disconnection of the remote end is
signalled by :data:`errno.EPIPE`.
:returns:
Tuple of `(return_value, disconnected)`, where `return_value` is the
return value of `func(*args)`, and `disconnected` is :data:`True` if
disconnection was detected, otherwise :data:`False`.
"""
while True:
try:
return func(*args), False
@ -296,7 +403,19 @@ def io_op(func, *args):
class PidfulStreamHandler(logging.StreamHandler):
"""A :class:`logging.StreamHandler` subclass used when
:meth:`Router.enable_debug() <mitogen.master.Router.enable_debug>` has been
called, or the `debug` parameter was specified during context construction.
Verifies the process ID has not changed on each call to :meth:`emit`,
reopening the associated log file when a change is detected.
This ensures logging to the per-process output files happens correctly even
when uncooperative third party components call :func:`os.fork`.
"""
#: PID that last opened the log file.
open_pid = None
#: Output path template.
template = '/tmp/mitogen.%s.%s.log'
def _reopen(self):
@ -350,6 +469,7 @@ def enable_profiling():
try:
return func(*args)
finally:
profiler.dump_stats('/tmp/mitogen.%d.%s.pstat' % (os.getpid(), name))
profiler.create_stats()
fp = open('/tmp/mitogen.stats.%d.%s.log' % (os.getpid(), name), 'w')
try:
@ -609,10 +729,12 @@ class Importer(object):
'debug',
'doas',
'docker',
'kubectl',
'fakessh',
'fork',
'jail',
'lxc',
'lxd',
'master',
'minify',
'parent',
@ -841,6 +963,16 @@ class LogHandler(logging.Handler):
logging.Handler.__init__(self)
self.context = context
self.local = threading.local()
self._buffer = []
def uncork(self):
self._send = self.context.send
for msg in self._buffer:
self._send(msg)
self._buffer = None
def _send(self, msg):
self._buffer.append(msg)
def emit(self, rec):
if rec.name == 'mitogen.io' or \
@ -854,7 +986,7 @@ class LogHandler(logging.Handler):
if isinstance(encoded, UnicodeType):
# Logging package emits both :(
encoded = encoded.encode('utf-8')
self.context.send(Message(data=encoded, handle=FORWARD_LOG))
self._send(Message(data=encoded, handle=FORWARD_LOG))
finally:
self.local.in_emit = False
@ -934,7 +1066,7 @@ class Stream(BasicStream):
:py:class:`BasicStream` subclass implementing mitogen's :ref:`stream
protocol <stream-protocol>`.
"""
#: If not ``None``, :py:class:`Router` stamps this into
#: If not :data:`None`, :py:class:`Router` stamps this into
#: :py:attr:`Message.auth_id` of every message received on this stream.
auth_id = None
@ -957,6 +1089,16 @@ class Stream(BasicStream):
def construct(self):
pass
def _internal_receive(self, broker, buf):
if self._input_buf and self._input_buf_len < 128:
self._input_buf[0] += buf
else:
self._input_buf.append(buf)
self._input_buf_len += len(buf)
while self._receive_one(broker):
pass
def on_receive(self, broker):
"""Handle the next complete message on the stream. Raise
:py:class:`StreamError` on failure."""
@ -966,14 +1108,7 @@ class Stream(BasicStream):
if not buf:
return self.on_disconnect(broker)
if self._input_buf and self._input_buf_len < 128:
self._input_buf[0] += buf
else:
self._input_buf.append(buf)
self._input_buf_len += len(buf)
while self._receive_one(broker):
pass
self._internal_receive(broker, buf)
HEADER_FMT = '>LLLLLL'
HEADER_LEN = struct.calcsize(HEADER_FMT)
@ -1827,15 +1962,76 @@ class Broker(object):
return 'Broker(%#x)' % (id(self),)
class Dispatcher(object):
def __init__(self, econtext):
self.econtext = econtext
#: Chain ID -> CallError if prior call failed.
self._error_by_chain_id = {}
self.recv = Receiver(router=econtext.router,
handle=CALL_FUNCTION,
policy=has_parent_authority)
listen(econtext.broker, 'shutdown', self.recv.close)
@classmethod
@takes_econtext
def forget_chain(cls, chain_id, econtext):
econtext.dispatcher._error_by_chain_id.pop(chain_id, None)
def _parse_request(self, msg):
data = msg.unpickle(throw=False)
_v and LOG.debug('_dispatch_one(%r)', data)
chain_id, modname, klass, func, args, kwargs = data
obj = import_module(modname)
if klass:
obj = getattr(obj, klass)
fn = getattr(obj, func)
if getattr(fn, 'mitogen_takes_econtext', None):
kwargs.setdefault('econtext', self.econtext)
if getattr(fn, 'mitogen_takes_router', None):
kwargs.setdefault('router', self.econtext.router)
return chain_id, fn, args, kwargs
def _dispatch_one(self, msg):
try:
chain_id, fn, args, kwargs = self._parse_request(msg)
except Exception:
return None, CallError(sys.exc_info()[1])
if chain_id in self._error_by_chain_id:
return chain_id, self._error_by_chain_id[chain_id]
try:
return chain_id, fn(*args, **kwargs)
except Exception:
e = CallError(sys.exc_info()[1])
if chain_id is not None:
self._error_by_chain_id[chain_id] = e
return chain_id, e
def _dispatch_calls(self):
for msg in self.recv:
chain_id, ret = self._dispatch_one(msg)
_v and LOG.debug('_dispatch_calls: %r -> %r', msg, ret)
if msg.reply_to:
msg.reply(ret)
elif isinstance(ret, CallError) and chain_id is None:
LOG.error('No-reply function call failed: %s', ret)
def run(self):
if self.econtext.config.get('on_start'):
self.econtext.config['on_start'](self.econtext)
_profile_hook('main', self._dispatch_calls)
class ExternalContext(object):
detached = False
def __init__(self, config):
self.config = config
def _on_broker_shutdown(self):
self.recv.close()
def _on_broker_exit(self):
if not self.config['profiling']:
os.kill(os.getpid(), signal.SIGTERM)
@ -1919,16 +2115,12 @@ class ExternalContext(object):
in_fd = self.config.get('in_fd', 100)
out_fd = self.config.get('out_fd', 1)
self.recv = Receiver(router=self.router,
handle=CALL_FUNCTION,
policy=has_parent_authority)
self.stream = Stream(self.router, parent_id)
self.stream.name = 'parent'
self.stream.accept(in_fd, out_fd)
self.stream.receive_side.keep_alive = False
listen(self.stream, 'disconnect', self._on_parent_disconnect)
listen(self.broker, 'shutdown', self._on_broker_shutdown)
listen(self.broker, 'exit', self._on_broker_exit)
os.close(in_fd)
@ -1940,9 +2132,10 @@ class ExternalContext(object):
pass # No first stage exists (e.g. fakessh)
def _setup_logging(self):
self.log_handler = LogHandler(self.master)
root = logging.getLogger()
root.setLevel(self.config['log_level'])
root.handlers = [LogHandler(self.master)]
root.handlers = [self.log_handler]
if self.config['debug']:
enable_debug_logging()
@ -2025,40 +2218,6 @@ class ExternalContext(object):
# Reopen with line buffering.
sys.stdout = os.fdopen(1, 'w', 1)
def _dispatch_one(self, msg):
data = msg.unpickle(throw=False)
_v and LOG.debug('_dispatch_calls(%r)', data)
modname, klass, func, args, kwargs = data
obj = import_module(modname)
if klass:
obj = getattr(obj, klass)
fn = getattr(obj, func)
if getattr(fn, 'mitogen_takes_econtext', None):
kwargs.setdefault('econtext', self)
if getattr(fn, 'mitogen_takes_router', None):
kwargs.setdefault('router', self.router)
return fn(*args, **kwargs)
def _dispatch_calls(self):
if self.config.get('on_start'):
self.config['on_start'](self)
for msg in self.recv:
try:
ret = self._dispatch_one(msg)
_v and LOG.debug('_dispatch_calls: %r -> %r', msg, ret)
if msg.reply_to:
msg.reply(ret)
except Exception:
e = sys.exc_info()[1]
if msg.reply_to:
_v and LOG.debug('_dispatch_calls: %s', e)
msg.reply(CallError(e))
else:
LOG.exception('_dispatch_calls: %r', msg)
self.dispatch_stopped = True
def main(self):
self._setup_master()
try:
@ -2072,14 +2231,16 @@ class ExternalContext(object):
if self.config.get('setup_stdio', True):
self._setup_stdio()
self.dispatcher = Dispatcher(self)
self.router.register(self.parent, self.stream)
self.log_handler.uncork()
sys.executable = os.environ.pop('ARGV0', sys.executable)
_v and LOG.debug('Connected to %s; my ID is %r, PID is %r',
self.parent, mitogen.context_id, os.getpid())
_v and LOG.debug('Recovered sys.executable: %r', sys.executable)
_profile_hook('main', self._dispatch_calls)
self.dispatcher.run()
_v and LOG.debug('ExternalContext.main() normal exit')
except KeyboardInterrupt:
LOG.debug('KeyboardInterrupt received, exiting gracefully.')

@ -183,15 +183,16 @@ def install_handler():
signal.signal(signal.SIGUSR2, _handler)
def _logging_main():
def _logging_main(secs):
while True:
time.sleep(5)
time.sleep(secs)
LOG.info('PERIODIC THREAD DUMP\n\n%s', get_snapshot())
def dump_to_logger():
def dump_to_logger(secs=5):
th = threading.Thread(
target=_logging_main,
kwargs={'secs': secs},
name='mitogen.debug.dump_to_logger',
)
th.setDaemon(True)

@ -45,8 +45,8 @@ class Stream(mitogen.parent.Stream):
create_child = staticmethod(mitogen.parent.hybrid_tty_create_child)
child_is_immediate_subprocess = False
#: Once connected, points to the corresponding TtyLogStream, allowing it to
#: be disconnected at the same time this stream is being torn down.
#: Once connected, points to the corresponding DiagLogStream, allowing it
#: to be disconnected at the same time this stream is being torn down.
tty_stream = None
username = 'root'
@ -89,7 +89,7 @@ class Stream(mitogen.parent.Stream):
password_required_msg = 'doas password is required'
def _connect_bootstrap(self, extra_fd):
self.tty_stream = mitogen.parent.TtyLogStream(extra_fd, self)
self.tty_stream = mitogen.parent.DiagLogStream(extra_fd, self)
password_sent = False
it = mitogen.parent.iter_read(

@ -43,6 +43,11 @@ class Stream(mitogen.parent.Stream):
username = None
docker_path = 'docker'
# TODO: better way of capturing errors such as "No such container."
create_child_args = {
'merge_stdio': True
}
def construct(self, container=None, image=None,
docker_path=None, username=None,
**kwargs):

@ -436,7 +436,7 @@ def run(dest, router, args, deadline=None, econtext=None):
ssh_path = os.path.join(tmp_path, 'ssh')
fp = open(ssh_path, 'w')
try:
fp.write('#!%s\n' % (sys.executable,))
fp.write('#!%s\n' % (mitogen.parent.get_sys_executable(),))
fp.write(inspect.getsource(mitogen.core))
fp.write('\n')
fp.write('ExternalContext(%r).main()\n' % (
@ -449,7 +449,7 @@ def run(dest, router, args, deadline=None, econtext=None):
env = os.environ.copy()
env.update({
'PATH': '%s:%s' % (tmp_path, env.get('PATH', '')),
'ARGV0': sys.executable,
'ARGV0': mitogen.parent.get_sys_executable(),
'SSH_PATH': ssh_path,
})

@ -75,6 +75,17 @@ def reset_logging_framework():
]
def on_fork():
"""
Should be called by any program integrating Mitogen each time the process
is forked, in the context of the new child.
"""
reset_logging_framework() # Must be first!
fixup_prngs()
mitogen.core.Latch._on_fork()
mitogen.core.Side._on_fork()
def handle_child_crash():
"""
Respond to _child_main() crashing by ensuring the relevant exception is
@ -134,10 +145,7 @@ class Stream(mitogen.parent.Stream):
handle_child_crash()
def _child_main(self, childfp):
reset_logging_framework() # Must be first!
fixup_prngs()
mitogen.core.Latch._on_fork()
mitogen.core.Side._on_fork()
on_fork()
if self.on_fork:
self.on_fork()
mitogen.core.set_block(childfp.fileno())

@ -0,0 +1,65 @@
# coding: utf-8
# Copyright 2018, Yannig Perré
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import logging
import mitogen.core
import mitogen.parent
LOG = logging.getLogger(__name__)
class Stream(mitogen.parent.Stream):
child_is_immediate_subprocess = True
pod = None
kubectl_path = 'kubectl'
kubectl_args = None
# TODO: better way of capturing errors such as "No such container."
create_child_args = {
'merge_stdio': True
}
def construct(self, pod, kubectl_path=None, kubectl_args=None, **kwargs):
super(Stream, self).construct(**kwargs)
assert pod
self.pod = pod
if kubectl_path:
self.kubectl_path = kubectl_path
self.kubectl_args = kubectl_args or []
def connect(self):
super(Stream, self).connect()
self.name = u'kubectl.%s%s' % (self.pod, self.kubectl_args)
def get_boot_command(self):
bits = [self.kubectl_path] + self.kubectl_args + ['exec', '-it', self.pod]
return bits + ["--"] + super(Stream, self).get_boot_command()

@ -52,7 +52,7 @@ class Stream(mitogen.parent.Stream):
super(Stream, self).construct(**kwargs)
self.container = container
if lxc_attach_path:
self.lxc_attach_path = lxc_attach_apth
self.lxc_attach_path = lxc_attach_path
def connect(self):
super(Stream, self).connect()

@ -0,0 +1,70 @@
# Copyright 2017, David Wilson
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import logging
import mitogen.core
import mitogen.parent
LOG = logging.getLogger(__name__)
class Stream(mitogen.parent.Stream):
child_is_immediate_subprocess = False
create_child_args = {
# If lxc finds any of stdin, stdout, stderr connected to a TTY, to
# prevent input injection it creates a proxy pty, forcing all IO to be
# buffered in <4KiB chunks. So ensure stderr is also routed to the
# socketpair.
'merge_stdio': True
}
container = None
lxc_path = 'lxc'
python_path = 'python'
def construct(self, container, lxc_path=None, **kwargs):
super(Stream, self).construct(**kwargs)
self.container = container
if lxc_path:
self.lxc_path = lxc_path
def connect(self):
super(Stream, self).connect()
self.name = u'lxd.' + self.container
def get_boot_command(self):
bits = [
self.lxc_path,
'exec',
'--mode=noninteractive',
self.container,
'--',
]
return bits + super(Stream, self).get_boot_command()

@ -83,7 +83,46 @@ def _stdlib_paths():
for p in prefixes)
def is_stdlib_name(modname):
"""Return :data:`True` if `modname` appears to come from the standard
library.
"""
if imp.is_builtin(modname) != 0:
return True
module = sys.modules.get(modname)
if module is None:
return False
# six installs crap with no __file__
modpath = os.path.abspath(getattr(module, '__file__', ''))
return is_stdlib_path(modpath)
_STDLIB_PATHS = _stdlib_paths()
def is_stdlib_path(path):
return any(
os.path.commonprefix((libpath, path)) == libpath
and 'site-packages' not in path
and 'dist-packages' not in path
for libpath in _STDLIB_PATHS
)
def get_child_modules(path):
"""Return the suffixes of submodules directly neated beneath of the package
directory at `path`.
:param str path:
Path to the module's source code on disk, or some PEP-302-recognized
equivalent. Usually this is the module's ``__file__`` attribute, but
is specified explicitly to avoid loading the module.
:return:
List of submodule name suffixes.
"""
it = pkgutil.iter_modules([os.path.dirname(path)])
return [to_text(name) for _, name, _ in it]
@ -168,24 +207,35 @@ def scan_code_imports(co):
class ThreadWatcher(object):
"""
Manage threads that waits for nother threads to shutdown, before invoking
`on_join()`. In CPython it seems possible to use this method to ensure a
non-main thread is signalled when the main thread has exitted, using yet
another thread as a proxy.
Manage threads that wait for another thread to shut down, before invoking
`on_join()` for each associated ThreadWatcher.
In CPython it seems possible to use this method to ensure a non-main thread
is signalled when the main thread has exited, using a third thread as a
proxy.
"""
_lock = threading.Lock()
_pid = None
_instances_by_target = {}
_thread_by_target = {}
#: Protects remaining _cls_* members.
_cls_lock = threading.Lock()
#: PID of the process that last modified the class data. If the PID
#: changes, it means the thread watch dict refers to threads that no longer
#: exist in the current process (since it forked), and so must be reset.
_cls_pid = None
#: Map watched Thread -> list of ThreadWatcher instances.
_cls_instances_by_target = {}
#: Map watched Thread -> watcher Thread for each watched thread.
_cls_thread_by_target = {}
@classmethod
def _reset(cls):
"""If we have forked since the watch dictionaries were initialized, all
that has is garbage, so clear it."""
if os.getpid() != cls._pid:
cls._pid = os.getpid()
cls._instances_by_target.clear()
cls._thread_by_target.clear()
if os.getpid() != cls._cls_pid:
cls._cls_pid = os.getpid()
cls._cls_instances_by_target.clear()
cls._cls_thread_by_target.clear()
def __init__(self, target, on_join):
self.target = target
@ -194,33 +244,34 @@ class ThreadWatcher(object):
@classmethod
def _watch(cls, target):
target.join()
for watcher in cls._instances_by_target[target]:
for watcher in cls._cls_instances_by_target[target]:
watcher.on_join()
def install(self):
self._lock.acquire()
self._cls_lock.acquire()
try:
self._reset()
self._instances_by_target.setdefault(self.target, []).append(self)
if self.target not in self._thread_by_target:
self._thread_by_target[self.target] = threading.Thread(
lst = self._cls_instances_by_target.setdefault(self.target, [])
lst.append(self)
if self.target not in self._cls_thread_by_target:
self._cls_thread_by_target[self.target] = threading.Thread(
name='mitogen.master.join_thread_async',
target=self._watch,
args=(self.target,)
)
self._thread_by_target[self.target].start()
self._cls_thread_by_target[self.target].start()
finally:
self._lock.release()
self._cls_lock.release()
def remove(self):
self._lock.acquire()
self._cls_lock.acquire()
try:
self._reset()
lst = self._instances_by_target.get(self.target, [])
lst = self._cls_instances_by_target.get(self.target, [])
if self in lst:
lst.remove(self)
finally:
self._lock.release()
self._cls_lock.release()
@classmethod
def watch(cls, target, on_join):
@ -230,6 +281,25 @@ class ThreadWatcher(object):
class LogForwarder(object):
"""
Install a :data:`mitogen.core.FORWARD_LOG` handler that delivers forwarded
log events into the local logging framework. This is used by the master's
:class:`Router`.
The forwarded :class:`logging.LogRecord` objects are delivered to loggers
under ``mitogen.ctx.*`` corresponding to their
:attr:`mitogen.core.Context.name`, with the message prefixed with the
logger name used in the child. The records include some extra attributes:
* ``mitogen_message``: Unicode original message without the logger name
prepended.
* ``mitogen_context``: :class:`mitogen.parent.Context` reference to the
source context.
* ``mitogen_name``: Original logger name.
:param mitogen.master.Router router:
Router to install the handler on.
"""
def __init__(self, router):
self._router = router
self._cache = {}
@ -246,7 +316,8 @@ class LogForwarder(object):
if logger is None:
context = self._router.context_by_id(msg.src_id)
if context is None:
LOG.error('FORWARD_LOG received from src_id %d', msg.src_id)
LOG.error('%s: dropping log from unknown context ID %d',
self, msg.src_id)
return
name = '%s.%s' % (RLOG.name, context.name)
@ -263,33 +334,6 @@ class LogForwarder(object):
return 'LogForwarder(%r)' % (self._router,)
_STDLIB_PATHS = _stdlib_paths()
def is_stdlib_path(path):
return any(
os.path.commonprefix((libpath, path)) == libpath
and 'site-packages' not in path
and 'dist-packages' not in path
for libpath in _STDLIB_PATHS
)
def is_stdlib_name(modname):
"""Return ``True`` if `modname` appears to come from the standard
library."""
if imp.is_builtin(modname) != 0:
return True
module = sys.modules.get(modname)
if module is None:
return False
# six installs crap with no __file__
modpath = os.path.abspath(getattr(module, '__file__', ''))
return is_stdlib_path(modpath)
class ModuleFinder(object):
def __init__(self):
#: Import machinery is expensive, keep :py:meth`:get_module_source`
@ -360,7 +404,7 @@ class ModuleFinder(object):
# requests.packages.urllib3.contrib.pyopenssl"
e = sys.exc_info()[1]
LOG.debug('%r: loading %r using %r failed: %s',
self, fullname, loader)
self, fullname, loader, e)
return
if path is None or source is None:
@ -412,8 +456,8 @@ class ModuleFinder(object):
source code.
:returns:
Tuple of `(module path, source text, is package?)`, or ``None`` if
the source cannot be found.
Tuple of `(module path, source text, is package?)`, or :data:`None`
if the source cannot be found.
"""
tup = self._found_cache.get(fullname)
if tup:
@ -542,6 +586,14 @@ class ModuleResponder(object):
return 'ModuleResponder(%r)' % (self._router,)
MAIN_RE = re.compile(b(r'^if\s+__name__\s*==\s*.__main__.\s*:'), re.M)
main_guard_msg = (
"A child context attempted to import __main__, however the main "
"module present in the master process lacks an execution guard. "
"Update %r to prevent unintended execution, using a guard like:\n"
"\n"
" if __name__ == '__main__':\n"
" # your code here.\n"
)
def whitelist_prefix(self, fullname):
if self.whitelist == ['']:
@ -551,14 +603,19 @@ class ModuleResponder(object):
def blacklist_prefix(self, fullname):
self.blacklist.append(fullname)
def neutralize_main(self, src):
def neutralize_main(self, path, src):
"""Given the source for the __main__ module, try to find where it
begins conditional execution based on a "if __name__ == '__main__'"
guard, and remove any code after that point."""
match = self.MAIN_RE.search(src)
if match:
return src[:match.start()]
return src
if b('mitogen.main(') in src:
return src
LOG.error(self.main_guard_msg, path)
raise ImportError('refused')
def _make_negative_response(self, fullname):
return (fullname, None, None, None, ())
@ -585,7 +642,7 @@ class ModuleResponder(object):
pkg_present = None
if fullname == '__main__':
source = self.neutralize_main(source)
source = self.neutralize_main(path, source)
compressed = mitogen.core.Blob(zlib.compress(source, 9))
related = [
to_text(name)
@ -670,8 +727,7 @@ class ModuleResponder(object):
)
)
def _forward_module(self, context, fullname):
IOLOG.debug('%r._forward_module(%r, %r)', self, context, fullname)
def _forward_one_module(self, context, fullname):
path = []
while fullname:
path.append(fullname)
@ -682,8 +738,13 @@ class ModuleResponder(object):
self._send_module_and_related(stream, fullname)
self._send_forward_module(stream, context, fullname)
def forward_module(self, context, fullname):
self._router.broker.defer(self._forward_module, context, fullname)
def _forward_modules(self, context, fullnames):
IOLOG.debug('%r._forward_modules(%r, %r)', self, context, fullnames)
for fullname in fullnames:
self._forward_one_module(context, fullname)
def forward_modules(self, context, fullnames):
self._router.broker.defer(self._forward_modules, context, fullnames)
class Broker(mitogen.core.Broker):

@ -48,10 +48,16 @@ except ImportError:
@lru_cache()
def minimize_source(source):
"""Remove most comments and docstrings from Python source code.
"""Remove comments and docstrings from Python `source`, preserving line
numbers and syntax of empty blocks.
:param str source:
The source to minimize.
:returns str:
The minimized source.
"""
if not isinstance(source, mitogen.core.UnicodeType):
source = source.decode('utf-8')
source = mitogen.core.to_text(source)
tokens = tokenize.generate_tokens(StringIO(source).readline)
tokens = strip_comments(tokens)
tokens = strip_docstrings(tokens)

@ -47,7 +47,6 @@ import termios
import textwrap
import threading
import time
import types
import zlib
# Absolute imports for <2.5.
@ -79,11 +78,48 @@ try:
except:
SC_OPEN_MAX = 1024
OPENPTY_MSG = (
"Failed to create a PTY: %s. It is likely the maximum number of PTYs has "
"been reached. Consider increasing the 'kern.tty.ptmx_max' sysctl on OS "
"X, the 'kernel.pty.max' sysctl on Linux, or modifying your configuration "
"to avoid PTY use."
)
SYS_EXECUTABLE_MSG = (
"The Python sys.executable variable is unset, indicating Python was "
"unable to determine its original program name. Unless explicitly "
"configured otherwise, child contexts will be started using "
"'/usr/bin/python'"
)
_sys_executable_warning_logged = False
SIGNAL_BY_NUM = dict(
(getattr(signal, name), name)
for name in sorted(vars(signal), reverse=True)
if name.startswith('SIG') and not name.startswith('SIG_')
)
def get_log_level():
return (LOG.level or logging.getLogger().level or logging.INFO)
def get_sys_executable():
"""
Return :data:`sys.executable` if it is set, otherwise return
``"/usr/bin/python"`` and log a warning.
"""
if sys.executable:
return sys.executable
global _sys_executable_warning_logged
if not _sys_executable_warning_logged:
LOG.warn(SYS_EXECUTABLE_MSG)
_sys_executable_warning_logged = True
return '/usr/bin/python'
def get_core_source():
"""
In non-masters, simply fetch the cached mitogen.core source code via the
@ -93,6 +129,19 @@ def get_core_source():
return inspect.getsource(mitogen.core)
def get_default_remote_name():
"""
Return the default name appearing in argv[0] of remote machines.
"""
s = u'%s@%s:%d'
s %= (getpass.getuser(), socket.gethostname(), os.getpid())
# In mixed UNIX/Windows environments, the username may contain slashes.
return s.translate({
ord(u'\\'): ord(u'_'),
ord(u'/'): ord(u'_')
})
def is_immediate_child(msg, stream):
"""
Handler policy that requires messages to arrive only from immediately
@ -144,6 +193,14 @@ def close_nonstandard_fds():
def create_socketpair():
"""
Create a :func:`socket.socketpair` to use for use as a child process's UNIX
stdio channels. As socket pairs are bidirectional, they are economical on
file descriptor usage as the same descriptor can be used for ``stdin`` and
``stdout``. As they are sockets their buffers are tunable, allowing large
buffers to be configured in order to improve throughput for file transfers
and reduce :class:`mitogen.core.Broker` IO loop iterations.
"""
parentfp, childfp = socket.socketpair()
parentfp.setsockopt(socket.SOL_SOCKET,
socket.SO_SNDBUF,
@ -154,7 +211,31 @@ def create_socketpair():
return parentfp, childfp
def create_child(args, merge_stdio=False, preexec_fn=None):
def detach_popen(*args, **kwargs):
"""
Use :class:`subprocess.Popen` to construct a child process, then hack the
Popen so that it forgets the child it created, allowing it to survive a
call to Popen.__del__.
If the child process is not detached, there is a race between it exitting
and __del__ being called. If it exits before __del__ runs, then __del__'s
call to :func:`os.waitpid` will capture the one and only exit event
delivered to this process, causing later 'legitimate' calls to fail with
ECHILD.
:returns:
Process ID of the new child.
"""
# This allows Popen() to be used for e.g. graceful post-fork error
# handling, without tying the surrounding code into managing a Popen
# object, which isn't possible for at least :mod:`mitogen.fork`. This
# should be replaced by a swappable helper class in a future version.
proc = subprocess.Popen(*args, **kwargs)
proc._child_created = False
return proc.pid
def create_child(args, merge_stdio=False, stderr_pipe=False, preexec_fn=None):
"""
Create a child process whose stdin/stdout is connected to a socket.
@ -165,8 +246,13 @@ def create_child(args, merge_stdio=False, preexec_fn=None):
socketpair, rather than inherited from the parent process. This may be
necessary to ensure that not TTY is connected to any stdio handle, for
instance when using LXC.
:param bool stderr_pipe:
If :data:`True` and `merge_stdio` is :data:`False`, arrange for
`stderr` to be connected to a separate pipe, to allow any ongoing debug
logs generated by e.g. SSH to be outpu as the session progresses,
without interfering with `stdout`.
:returns:
`(pid, socket_obj, :data:`None`)`
`(pid, socket_obj, :data:`None` or pipe_fd)`
"""
parentfp, childfp = create_socketpair()
# When running under a monkey patches-enabled gevent, the socket module
@ -175,12 +261,17 @@ def create_child(args, merge_stdio=False, preexec_fn=None):
# O_NONBLOCK from Python's future stdin fd.
mitogen.core.set_block(childfp.fileno())
stderr_r = None
extra = {}
if merge_stdio:
extra = {'stderr': childfp}
else:
extra = {}
elif stderr_pipe:
stderr_r, stderr_w = os.pipe()
mitogen.core.set_cloexec(stderr_r)
mitogen.core.set_cloexec(stderr_w)
extra = {'stderr': stderr_w}
proc = subprocess.Popen(
pid = detach_popen(
args=args,
stdin=childfp,
stdout=childfp,
@ -188,14 +279,16 @@ def create_child(args, merge_stdio=False, preexec_fn=None):
preexec_fn=preexec_fn,
**extra
)
if stderr_pipe:
os.close(stderr_w)
childfp.close()
# Decouple the socket from the lifetime of the Python socket object.
fd = os.dup(parentfp.fileno())
parentfp.close()
LOG.debug('create_child() child %d fd %d, parent %d, cmd: %s',
proc.pid, fd, os.getpid(), Argv(args))
return proc.pid, fd, None
pid, fd, os.getpid(), Argv(args))
return pid, fd, stderr_r
def _acquire_controlling_tty():
@ -210,6 +303,22 @@ def _acquire_controlling_tty():
fcntl.ioctl(2, termios.TIOCSCTTY)
def openpty():
"""
Call :func:`os.openpty`, raising a descriptive error if the call fails.
:raises mitogen.core.StreamError:
Creating a PTY failed.
:returns:
See :func`os.openpty`.
"""
try:
return os.openpty()
except OSError:
e = sys.exc_info()[1]
raise mitogen.core.StreamError(OPENPTY_MSG, e)
def tty_create_child(args):
"""
Return a file descriptor connected to the master end of a pseudo-terminal,
@ -224,12 +333,12 @@ def tty_create_child(args):
:returns:
`(pid, tty_fd, None)`
"""
master_fd, slave_fd = os.openpty()
master_fd, slave_fd = openpty()
mitogen.core.set_block(slave_fd)
disable_echo(master_fd)
disable_echo(slave_fd)
proc = subprocess.Popen(
pid = detach_popen(
args=args,
stdin=slave_fd,
stdout=slave_fd,
@ -240,8 +349,8 @@ def tty_create_child(args):
os.close(slave_fd)
LOG.debug('tty_create_child() child %d fd %d, parent %d, cmd: %s',
proc.pid, master_fd, os.getpid(), Argv(args))
return proc.pid, master_fd, None
pid, master_fd, os.getpid(), Argv(args))
return pid, master_fd, None
def hybrid_tty_create_child(args):
@ -256,14 +365,14 @@ def hybrid_tty_create_child(args):
:returns:
`(pid, socketpair_fd, tty_fd)`
"""
master_fd, slave_fd = os.openpty()
master_fd, slave_fd = openpty()
parentfp, childfp = create_socketpair()
mitogen.core.set_block(slave_fd)
mitogen.core.set_block(childfp)
disable_echo(master_fd)
disable_echo(slave_fd)
proc = subprocess.Popen(
pid = detach_popen(
args=args,
stdin=childfp,
stdout=childfp,
@ -279,11 +388,27 @@ def hybrid_tty_create_child(args):
parentfp.close()
LOG.debug('hybrid_tty_create_child() pid=%d stdio=%d, tty=%d, cmd: %s',
proc.pid, stdio_fd, master_fd, Argv(args))
return proc.pid, stdio_fd, master_fd
pid, stdio_fd, master_fd, Argv(args))
return pid, stdio_fd, master_fd
def write_all(fd, s, deadline=None):
"""Arrange for all of bytestring `s` to be written to the file descriptor
`fd`.
:param int fd:
File descriptor to write to.
:param bytes s:
Bytestring to write to file descriptor.
:param float deadline:
If not :data:`None`, absolute UNIX timestamp after which timeout should
occur.
:raises mitogen.core.TimeoutError:
Bytestring could not be written entirely before deadline was exceeded.
:raises mitogen.core.StreamError:
File descriptor was disconnected before write could complete.
"""
timeout = None
written = 0
poller = PREFERRED_POLLER()
@ -312,6 +437,20 @@ def write_all(fd, s, deadline=None):
def iter_read(fds, deadline=None):
"""Return a generator that arranges for up to 4096-byte chunks to be read
at a time from the file descriptor `fd` until the generator is destroyed.
:param int fd:
File descriptor to read from.
:param float deadline:
If not :data:`None`, an absolute UNIX timestamp after which timeout
should occur.
:raises mitogen.core.TimeoutError:
Attempt to read beyond deadline.
:raises mitogen.core.StreamError:
Attempt to read past end of file.
"""
poller = PREFERRED_POLLER()
for fd in fds:
poller.start_receive(fd)
@ -346,6 +485,24 @@ def iter_read(fds, deadline=None):
def discard_until(fd, s, deadline):
"""Read chunks from `fd` until one is encountered that ends with `s`. This
is used to skip output produced by ``/etc/profile``, ``/etc/motd`` and
mandatory SSH banners while waiting for :attr:`Stream.EC0_MARKER` to
appear, indicating the first stage is ready to receive the compressed
:mod:`mitogen.core` source.
:param int fd:
File descriptor to read from.
:param bytes s:
Marker string to discard until encountered.
:param float deadline:
Absolute UNIX timestamp after which timeout should occur.
:raises mitogen.core.TimeoutError:
Attempt to read beyond deadline.
:raises mitogen.core.StreamError:
Attempt to read past end of file.
"""
for buf in iter_read([fd], deadline):
if IOLOG.level == logging.DEBUG:
for line in buf.splitlines():
@ -396,23 +553,6 @@ def upgrade_router(econtext):
)
def make_call_msg(fn, *args, **kwargs):
if isinstance(fn, types.MethodType) and \
isinstance(fn.im_self, (type, types.ClassType)):
klass = mitogen.core.to_text(fn.im_self.__name__)
else:
klass = None
tup = (
mitogen.core.to_text(fn.__module__),
klass,
mitogen.core.to_text(fn.__name__),
args,
mitogen.core.Kwargs(kwargs)
)
return mitogen.core.Message.pickled(tup, handle=mitogen.core.CALL_FUNCTION)
def stream_by_method_name(name):
"""
Given the name of a Mitogen connection method, import its implementation
@ -450,6 +590,21 @@ def _proxy_connect(name, method_name, kwargs, econtext):
}
def wstatus_to_str(status):
"""
Parse and format a :func:`os.waitpid` exit status.
"""
if os.WIFEXITED(status):
return 'exited with return code %d' % (os.WEXITSTATUS(status),)
if os.WIFSIGNALED(status):
n = os.WTERMSIG(status)
return 'exited due to signal %d (%s)' % (n, SIGNAL_BY_NUM.get(n))
if os.WIFSTOPPED(status):
n = os.WSTOPSIG(status)
return 'stopped due to signal %d (%s)' % (n, SIGNAL_BY_NUM.get(n))
return 'unknown wait status (%d)' % (status,)
class Argv(object):
"""
Wrapper to defer argv formatting when debug logging is disabled.
@ -486,8 +641,12 @@ class CallSpec(object):
self.kwargs = kwargs
def _get_name(self):
return u'%s.%s' % (self.func.__module__,
self.func.__name__)
bits = [self.func.__module__]
if inspect.ismethod(self.func):
bits.append(getattr(self.func.__self__, '__name__', None) or
getattr(type(self.func.__self__), '__name__', None))
bits.append(self.func.__name__)
return u'.'.join(bits)
def _get_args(self):
return u', '.join(repr(a) for a in self.args)
@ -678,7 +837,7 @@ PREFERRED_POLLER = POLLER_BY_SYSNAME.get(
mitogen.core.Latch.poller_class = PREFERRED_POLLER
class TtyLogStream(mitogen.core.BasicStream):
class DiagLogStream(mitogen.core.BasicStream):
"""
For "hybrid TTY/socketpair" mode, after a connection has been setup, a
spare TTY file descriptor will exist that cannot be closed, and to which
@ -688,18 +847,21 @@ class TtyLogStream(mitogen.core.BasicStream):
termination signal to any processes whose controlling TTY is the TTY that
has been closed.
TtyLogStream takes over this descriptor and creates corresponding log
DiagLogStream takes over this descriptor and creates corresponding log
messages for anything written to it.
"""
def __init__(self, tty_fd, stream):
self.receive_side = mitogen.core.Side(self, tty_fd)
def __init__(self, fd, stream):
self.receive_side = mitogen.core.Side(self, fd)
self.transmit_side = self.receive_side
self.stream = stream
self.buf = ''
def __repr__(self):
return 'mitogen.parent.TtyLogStream(%r)' % (self.stream.name,)
return 'mitogen.parent.DiagLogStream(fd=%r, %r)' % (
self.receive_side.fd,
self.stream.name,
)
def on_receive(self, broker):
"""
@ -724,7 +886,7 @@ class Stream(mitogen.core.Stream):
Base for streams capable of starting new slaves.
"""
#: The path to the remote Python interpreter.
python_path = sys.executable
python_path = get_sys_executable()
#: Maximum time to wait for a connection attempt.
connect_timeout = 30.0
@ -765,8 +927,7 @@ class Stream(mitogen.core.Stream):
if connect_timeout:
self.connect_timeout = connect_timeout
if remote_name is None:
remote_name = '%s@%s:%d'
remote_name %= (getpass.getuser(), socket.gethostname(), os.getpid())
remote_name = get_default_remote_name()
if '/' in remote_name or '\\' in remote_name:
raise ValueError('remote_name= cannot contain slashes')
self.remote_name = remote_name
@ -821,7 +982,7 @@ class Stream(mitogen.core.Stream):
self._reaped = True
if pid:
LOG.debug('%r: child process exit status was %d', self, status)
LOG.debug('%r: PID %d %s', self, pid, wstatus_to_str(status))
return
# For processes like sudo we cannot actually send sudo a signal,
@ -968,7 +1129,9 @@ class Stream(mitogen.core.Stream):
self._reap_child()
raise
#: For ssh.py, this must be at least max(len('password'), len('debug1:'))
#: Sentinel value emitted by the first stage to indicate it is ready to
#: receive the compressed bootstrap. For :mod:`mitogen.ssh` this must have
#: length of at least `max(len('password'), len('debug1:'))`
EC0_MARKER = mitogen.core.b('MITO000\n')
EC1_MARKER = mitogen.core.b('MITO001\n')
@ -1007,9 +1170,215 @@ class ChildIdAllocator(object):
return self.allocate()
class CallChain(object):
"""
Deliver :data:`mitogen.core.CALL_FUNCTION` messages to a target context,
optionally threading related calls so an exception in an earlier call
cancels subsequent calls.
:param mitogen.core.Context context:
Target context.
:param bool pipelined:
Enable pipelining.
:meth:`call`, :meth:`call_no_reply` and :meth:`call_async`
normally issue calls and produce responses with no memory of prior
exceptions. If a call made with :meth:`call_no_reply` fails, the exception
is logged to the target context's logging framework.
**Pipelining**
When pipelining is enabled, if an exception occurs during a call,
subsequent calls made by the same :class:`CallChain` fail with the same
exception, including those already in-flight on the network, and no further
calls execute until :meth:`reset` is invoked.
No exception is logged for calls made with :meth:`call_no_reply`, instead
the exception is saved and reported as the result of subsequent
:meth:`call` or :meth:`call_async` calls.
Sequences of asynchronous calls can be made without wasting network
round-trips to discover if prior calls succeed, and chains originating from
multiple unrelated source contexts may overlap concurrently at a target
context without interference.
In this example, 4 calls complete in one round-trip::
chain = mitogen.parent.CallChain(context, pipelined=True)
chain.call_no_reply(os.mkdir, '/tmp/foo')
# If previous mkdir() failed, this never runs:
chain.call_no_reply(os.mkdir, '/tmp/foo/bar')
# If either mkdir() failed, this never runs, and the exception is
# asynchronously delivered to the receiver.
recv = chain.call_async(subprocess.check_output, '/tmp/foo')
# If anything so far failed, this never runs, and raises the exception.
chain.call(do_something)
# If this code was executed, the exception would also be raised.
if recv.get().unpickle() == 'baz':
pass
When pipelining is enabled, :meth:`reset` must be invoked to ensure any
exception is discarded, otherwise unbounded memory usage is possible in
long-running programs. The context manager protocol is supported to ensure
:meth:`reset` is always invoked::
with mitogen.parent.CallChain(context, pipelined=True) as chain:
chain.call_no_reply(...)
chain.call_no_reply(...)
chain.call_no_reply(...)
chain.call(...)
# chain.reset() automatically invoked.
"""
def __init__(self, context, pipelined=False):
self.context = context
if pipelined:
self.chain_id = self.make_chain_id()
else:
self.chain_id = None
@classmethod
def make_chain_id(cls):
return '%s-%s-%x-%x' % (
socket.gethostname(),
os.getpid(),
threading.currentThread().ident,
int(1e6 * time.time()),
)
def __repr__(self):
return '%s(%s)' % (self.__class__.__name__, self.context)
def __enter__(self):
return self
def __exit__(self, _1, _2, _3):
self.reset()
def reset(self):
"""
Instruct the target to forget any related exception.
"""
if not self.chain_id:
return
saved, self.chain_id = self.chain_id, None
try:
self.call_no_reply(mitogen.core.Dispatcher.forget_chain, saved)
finally:
self.chain_id = saved
def make_msg(self, fn, *args, **kwargs):
if inspect.ismethod(fn) and inspect.isclass(fn.__self__):
klass = mitogen.core.to_text(fn.__self__.__name__)
else:
klass = None
tup = (
self.chain_id,
mitogen.core.to_text(fn.__module__),
klass,
mitogen.core.to_text(fn.__name__),
args,
mitogen.core.Kwargs(kwargs)
)
return mitogen.core.Message.pickled(tup,
handle=mitogen.core.CALL_FUNCTION)
def call_no_reply(self, fn, *args, **kwargs):
"""
Like :meth:`call_async`, but do not wait for a return value, and inform
the target context no reply is expected. If the call fails and
pipelining is disabled, the exception will be logged to the target
context's logging framework.
"""
LOG.debug('%r.call_no_reply(): %r', self, CallSpec(fn, args, kwargs))
self.context.send(self.make_msg(fn, *args, **kwargs))
def call_async(self, fn, *args, **kwargs):
"""
Arrange for `fn(*args, **kwargs)` to be invoked on the context's main
thread.
:param fn:
A free function in module scope or a class method of a class
directly reachable from module scope:
.. code-block:: python
# mymodule.py
def my_func():
'''A free function reachable as mymodule.my_func'''
class MyClass:
@classmethod
def my_classmethod(cls):
'''Reachable as mymodule.MyClass.my_classmethod'''
def my_instancemethod(self):
'''Unreachable: requires a class instance!'''
class MyEmbeddedClass:
@classmethod
def my_classmethod(cls):
'''Not directly reachable from module scope!'''
:param tuple args:
Function arguments, if any. See :ref:`serialization-rules` for
permitted types.
:param dict kwargs:
Function keyword arguments, if any. See :ref:`serialization-rules`
for permitted types.
:returns:
:class:`mitogen.core.Receiver` configured to receive the result of
the invocation:
.. code-block:: python
recv = context.call_async(os.check_output, 'ls /tmp/')
try:
# Prints output once it is received.
msg = recv.get()
print(msg.unpickle())
except mitogen.core.CallError, e:
print('Call failed:', str(e))
Asynchronous calls may be dispatched in parallel to multiple
contexts and consumed as they complete using
:class:`mitogen.select.Select`.
"""
LOG.debug('%r.call_async(): %r', self, CallSpec(fn, args, kwargs))
return self.context.send_async(self.make_msg(fn, *args, **kwargs))
def call(self, fn, *args, **kwargs):
"""
Like :meth:`call_async`, but block until the return value is available.
Equivalent to::
call_async(fn, *args, **kwargs).get().unpickle()
:returns:
The function's return value.
:raises mitogen.core.CallError:
An exception was raised in the remote context during execution.
"""
receiver = self.call_async(fn, *args, **kwargs)
return receiver.get().unpickle(throw_dead=False)
class Context(mitogen.core.Context):
call_chain_class = CallChain
via = None
def __init__(self, *args, **kwargs):
super(Context, self).__init__(*args, **kwargs)
self.default_call_chain = self.call_chain_class(self)
def __eq__(self, other):
return (isinstance(other, mitogen.core.Context) and
(other.context_id == self.context_id) and
@ -1019,17 +1388,13 @@ class Context(mitogen.core.Context):
return hash((self.router, self.context_id))
def call_async(self, fn, *args, **kwargs):
LOG.debug('%r.call_async(): %r', self, CallSpec(fn, args, kwargs))
return self.send_async(make_call_msg(fn, *args, **kwargs))
return self.default_call_chain.call_async(fn, *args, **kwargs)
def call(self, fn, *args, **kwargs):
receiver = self.call_async(fn, *args, **kwargs)
return receiver.get().unpickle(throw_dead=False)
return self.default_call_chain.call(fn, *args, **kwargs)
def call_no_reply(self, fn, *args, **kwargs):
LOG.debug('%r.call_no_reply(%r, *%r, **%r)',
self, fn, args, kwargs)
self.send(make_call_msg(fn, *args, **kwargs))
self.default_call_chain.call_no_reply(fn, *args, **kwargs)
def shutdown(self, wait=False):
LOG.debug('%r.shutdown() sending SHUTDOWN', self)
@ -1276,6 +1641,9 @@ class Router(mitogen.core.Router):
def docker(self, **kwargs):
return self.connect(u'docker', **kwargs)
def kubectl(self, **kwargs):
return self.connect(u'kubectl', **kwargs)
def fork(self, **kwargs):
return self.connect(u'fork', **kwargs)
@ -1288,6 +1656,9 @@ class Router(mitogen.core.Router):
def lxc(self, **kwargs):
return self.connect(u'lxc', **kwargs)
def lxd(self, **kwargs):
return self.connect(u'lxd', **kwargs)
def setns(self, **kwargs):
return self.connect(u'setns', **kwargs)

@ -372,8 +372,9 @@ class DeduplicatingInvoker(Invoker):
class Service(object):
#: Sentinel object to suppress reply generation, since returning ``None``
#: will trigger a response message containing the pickled ``None``.
#: Sentinel object to suppress reply generation, since returning
#: :data:`None` will trigger a response message containing the pickled
#: :data:`None`.
NO_REPLY = object()
invoker_class = Invoker
@ -635,8 +636,7 @@ class PushFileService(Service):
"""
for path in paths:
self.propagate_to(context, path)
for fullname in modules:
self.router.responder.forward_module(context, fullname)
self.router.responder.forward_modules(context, modules)
@expose(policy=AllowParents())
@arg_spec({
@ -873,7 +873,14 @@ class FileService(Service):
raise Error(self.context_mismatch_msg)
LOG.debug('Serving %r', path)
fp = open(path, 'rb', self.IO_SIZE)
try:
fp = open(path, 'rb', self.IO_SIZE)
except IOError:
msg.reply(mitogen.core.CallError(
sys.exc_info()[1]
))
return
# Response must arrive first so requestee can begin receive loop,
# otherwise first ack won't arrive until all pending chunks were
# delivered. In that case max BDP would always be 128KiB, aka. max

@ -94,6 +94,16 @@ def get_lxc_pid(path, name):
raise Error("could not find PID from lxc-info output.\n%s", output)
def get_lxd_pid(path, name):
output = _run_command([path, 'info', name])
for line in output.splitlines():
bits = line.split()
if bits and bits[0] == 'Pid:':
return int(bits[1])
raise Error("could not find PID from lxc output.\n%s", output)
def get_machinectl_pid(path, name):
output = _run_command([path, 'status', name])
for line in output.splitlines():
@ -108,20 +118,24 @@ class Stream(mitogen.parent.Stream):
child_is_immediate_subprocess = False
container = None
username = None
username = 'root'
kind = None
python_path = 'python'
docker_path = 'docker'
lxc_path = 'lxc'
lxc_info_path = 'lxc-info'
machinectl_path = 'machinectl'
GET_LEADER_BY_KIND = {
'docker': ('docker_path', get_docker_pid),
'lxc': ('lxc_info_path', get_lxc_pid),
'lxd': ('lxc_path', get_lxd_pid),
'machinectl': ('machinectl_path', get_machinectl_pid),
}
def construct(self, container, kind, username=None, docker_path=None,
lxc_info_path=None, machinectl_path=None, **kwargs):
lxc_path=None, lxc_info_path=None, machinectl_path=None,
**kwargs):
super(Stream, self).construct(**kwargs)
if kind not in self.GET_LEADER_BY_KIND:
raise Error('unsupported container kind: %r', kind)
@ -132,6 +146,8 @@ class Stream(mitogen.parent.Stream):
self.username = username
if docker_path:
self.docker_path = docker_path
if lxc_path:
self.lxc_path = lxc_path
if lxc_info_path:
self.lxc_info_path = lxc_info_path
if machinectl_path:
@ -168,27 +184,26 @@ class Stream(mitogen.parent.Stream):
except AttributeError:
pass
if self.username:
try:
os.setgroups([grent.gr_gid
for grent in grp.getgrall()
if self.username in grent.gr_mem])
pwent = pwd.getpwnam(self.username)
os.setreuid(pwent.pw_uid, pwent.pw_uid)
# shadow-4.4/libmisc/setupenv.c. Not done: MAIL, PATH
os.environ.update({
'HOME': pwent.pw_dir,
'SHELL': pwent.pw_shell or '/bin/sh',
'LOGNAME': self.username,
'USER': self.username,
})
if ((os.path.exists(pwent.pw_dir) and
os.access(pwent.pw_dir, os.X_OK))):
os.chdir(pwent.pw_dir)
except Exception:
e = sys.exc_info()[1]
raise Error(self.username_msg, self.username, self.container,
type(e).__name__, e)
try:
os.setgroups([grent.gr_gid
for grent in grp.getgrall()
if self.username in grent.gr_mem])
pwent = pwd.getpwnam(self.username)
os.setreuid(pwent.pw_uid, pwent.pw_uid)
# shadow-4.4/libmisc/setupenv.c. Not done: MAIL, PATH
os.environ.update({
'HOME': pwent.pw_dir,
'SHELL': pwent.pw_shell or '/bin/sh',
'LOGNAME': self.username,
'USER': self.username,
})
if ((os.path.exists(pwent.pw_dir) and
os.access(pwent.pw_dir, os.X_OK))):
os.chdir(pwent.pw_dir)
except Exception:
e = sys.exc_info()[1]
raise Error(self.username_msg, self.username, self.container,
type(e).__name__, e)
username_msg = 'while transitioning to user %r in container %r: %s: %s'

@ -111,7 +111,6 @@ class HostKeyError(mitogen.core.StreamError):
class Stream(mitogen.parent.Stream):
create_child = staticmethod(mitogen.parent.hybrid_tty_create_child)
child_is_immediate_subprocess = False
#: Default to whatever is available as 'python' on the remote machine,
@ -121,8 +120,8 @@ class Stream(mitogen.parent.Stream):
#: Number of -v invocations to pass on command line.
ssh_debug_level = 0
#: Once connected, points to the corresponding TtyLogStream, allowing it to
#: be disconnected at the same time this stream is being torn down.
#: If batch_mode=False, points to the corresponding DiagLogStream, allowing
#: it to be disconnected at the same time this stream is being torn down.
tty_stream = None
#: The path to the SSH binary.
@ -142,7 +141,7 @@ class Stream(mitogen.parent.Stream):
check_host_keys='enforce', password=None, identity_file=None,
compression=True, ssh_args=None, keepalive_enabled=True,
keepalive_count=3, keepalive_interval=15,
ssh_debug_level=None, **kwargs):
identities_only=True, ssh_debug_level=None, **kwargs):
super(Stream, self).construct(**kwargs)
if check_host_keys not in ('accept', 'enforce', 'ignore'):
raise ValueError(self.check_host_keys_msg)
@ -153,6 +152,7 @@ class Stream(mitogen.parent.Stream):
self.check_host_keys = check_host_keys
self.password = password
self.identity_file = identity_file
self.identities_only = identities_only
self.compression = compression
self.keepalive_enabled = keepalive_enabled
self.keepalive_count = keepalive_count
@ -164,8 +164,33 @@ class Stream(mitogen.parent.Stream):
if ssh_debug_level:
self.ssh_debug_level = ssh_debug_level
self._init_create_child()
def _requires_pty(self):
"""
Return :data:`True` if the configuration requires a PTY to be
allocated. This is only true if we must interactively accept host keys,
or type a password.
"""
return (self.check_host_keys == 'accept' or
self.password is not None)
def _init_create_child(self):
"""
Initialize the base class :attr:`create_child` and
:attr:`create_child_args` according to whether we need a PTY or not.
"""
if self._requires_pty():
self.create_child = mitogen.parent.hybrid_tty_create_child
else:
self.create_child = mitogen.parent.create_child
self.create_child_args = {
'stderr_pipe': True,
}
def on_disconnect(self, broker):
self.tty_stream.on_disconnect(broker)
if self.tty_stream is not None:
self.tty_stream.on_disconnect(broker)
super(Stream, self).on_disconnect(broker)
def get_boot_command(self):
@ -181,7 +206,7 @@ class Stream(mitogen.parent.Stream):
bits += ['-l', self.username]
if self.port is not None:
bits += ['-p', str(self.port)]
if self.identity_file or self.password:
if self.identities_only and (self.identity_file or self.password):
bits += ['-o', 'IdentitiesOnly yes']
if self.identity_file:
bits += ['-i', self.identity_file]
@ -192,6 +217,8 @@ class Stream(mitogen.parent.Stream):
'-o', 'ServerAliveInterval %s' % (self.keepalive_interval,),
'-o', 'ServerAliveCountMax %s' % (self.keepalive_count,),
]
if not self._requires_pty():
bits += ['-o', 'BatchMode yes']
if self.check_host_keys == 'enforce':
bits += ['-o', 'StrictHostKeyChecking yes']
if self.check_host_keys == 'accept':
@ -231,7 +258,7 @@ class Stream(mitogen.parent.Stream):
def _host_key_prompt(self):
if self.check_host_keys == 'accept':
LOG.debug('%r: accepting host key', self)
self.tty_stream.transmit_side.write('y\n')
self.tty_stream.transmit_side.write(b('y\n'))
return
# _host_key_prompt() should never be reached with ignore or enforce
@ -239,38 +266,51 @@ class Stream(mitogen.parent.Stream):
# with ours.
raise HostKeyError(self.hostkey_config_msg)
def _ec0_received(self):
if self.tty_stream is not None:
self._router.broker.start_receive(self.tty_stream)
return super(Stream, self)._ec0_received()
def _connect_bootstrap(self, extra_fd):
self.tty_stream = mitogen.parent.TtyLogStream(extra_fd, self)
fds = [self.receive_side.fd]
if extra_fd is not None:
self.tty_stream = mitogen.parent.DiagLogStream(extra_fd, self)
fds.append(extra_fd)
password_sent = False
it = mitogen.parent.iter_read(
fds=[self.receive_side.fd, extra_fd],
deadline=self.connect_deadline
)
it = mitogen.parent.iter_read(fds=fds, deadline=self.connect_deadline)
password_sent = False
for buf, partial in filter_debug(self, it):
LOG.debug('%r: received %r', self, buf)
if buf.endswith(self.EC0_MARKER):
self._router.broker.start_receive(self.tty_stream)
self._ec0_received()
return
elif HOSTKEY_REQ_PROMPT in buf.lower():
self._host_key_prompt()
elif HOSTKEY_FAIL in buf.lower():
raise HostKeyError(self.hostkey_failed_msg)
elif buf.lower().startswith(PERMDENIED_PROMPT):
elif buf.lower().startswith((
PERMDENIED_PROMPT,
b("%s@%s: " % (self.username, self.hostname))
+ PERMDENIED_PROMPT,
)):
# issue #271: work around conflict with user shell reporting
# 'permission denied' e.g. during chdir($HOME) by only matching
# it at the start of the line.
if self.password is not None and password_sent:
raise PasswordError(self.password_incorrect_msg)
elif PASSWORD_PROMPT in buf and self.password is None:
# Permission denied (password,pubkey)
raise PasswordError(self.password_required_msg)
else:
raise PasswordError(self.auth_incorrect_msg)
elif partial and PASSWORD_PROMPT in buf.lower():
if self.password is None:
raise PasswordError(self.password_required_msg)
LOG.debug('%r: sending password', self)
self.tty_stream.transmit_side.write((self.password + '\n').encode())
self.tty_stream.transmit_side.write(
(self.password + '\n').encode()
)
password_sent = True
raise mitogen.core.StreamError('bootstrap failed')

@ -49,7 +49,7 @@ class Stream(mitogen.parent.Stream):
create_child = staticmethod(mitogen.parent.tty_create_child)
child_is_immediate_subprocess = False
#: Once connected, points to the corresponding TtyLogStream, allowing it to
#: Once connected, points to the corresponding DiagLogStream, allowing it to
#: be disconnected at the same time this stream is being torn down.
username = 'root'

@ -49,7 +49,7 @@ SUDO_OPTIONS = [
#(False, 'str', '--group', '-g')
(True, 'bool', '--set-home', '-H'),
#(False, 'str', '--host', '-h')
#(False, 'bool', '--login', '-i')
(False, 'bool', '--login', '-i'),
#(False, 'bool', '--remove-timestamp', '-K')
#(False, 'bool', '--reset-timestamp', '-k')
#(False, 'bool', '--list', '-l')
@ -107,7 +107,7 @@ class Stream(mitogen.parent.Stream):
create_child = staticmethod(mitogen.parent.hybrid_tty_create_child)
child_is_immediate_subprocess = False
#: Once connected, points to the corresponding TtyLogStream, allowing it to
#: Once connected, points to the corresponding DiagLogStream, allowing it to
#: be disconnected at the same time this stream is being torn down.
tty_stream = None
@ -116,10 +116,11 @@ class Stream(mitogen.parent.Stream):
password = None
preserve_env = False
set_home = False
login = False
def construct(self, username=None, sudo_path=None, password=None,
preserve_env=None, set_home=None, sudo_args=None,
**kwargs):
login=None, **kwargs):
super(Stream, self).construct(**kwargs)
opts = parse_sudo_flags(sudo_args or [])
@ -133,6 +134,8 @@ class Stream(mitogen.parent.Stream):
self.preserve_env = preserve_env or opts.preserve_env
if (set_home or opts.set_home) is not None:
self.set_home = set_home or opts.set_home
if (login or opts.login) is not None:
self.login = True
def connect(self):
super(Stream, self).connect()
@ -144,13 +147,16 @@ class Stream(mitogen.parent.Stream):
def get_boot_command(self):
# Note: sudo did not introduce long-format option processing until July
# 2013, so even though we parse long-format options, we always supply
# short-form to the sudo command.
# 2013, so even though we parse long-format options, supply short-form
# to the sudo command.
bits = [self.sudo_path, '-u', self.username]
if self.preserve_env:
bits += ['-E']
if self.set_home:
bits += ['-H']
if self.login:
bits += ['-i']
bits = bits + super(Stream, self).get_boot_command()
LOG.debug('sudo command line: %r', bits)
return bits
@ -159,7 +165,7 @@ class Stream(mitogen.parent.Stream):
password_required_msg = 'sudo password is required'
def _connect_bootstrap(self, extra_fd):
self.tty_stream = mitogen.parent.TtyLogStream(extra_fd, self)
self.tty_stream = mitogen.parent.DiagLogStream(extra_fd, self)
password_sent = False
it = mitogen.parent.iter_read(

@ -63,7 +63,7 @@ def make_socket_path():
class Listener(mitogen.core.BasicStream):
keep_alive = True
def __init__(self, router, path=None, backlog=30):
def __init__(self, router, path=None, backlog=100):
self._router = router
self.path = path or make_socket_path()
self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
@ -78,22 +78,39 @@ class Listener(mitogen.core.BasicStream):
self.receive_side = mitogen.core.Side(self, self._sock.fileno())
router.broker.start_receive(self)
def on_receive(self, broker):
sock, _ = self._sock.accept()
def _accept_client(self, sock):
sock.setblocking(True)
pid, = struct.unpack('>L', sock.recv(4))
try:
pid, = struct.unpack('>L', sock.recv(4))
except socket.error:
LOG.error('%r: failed to read remote identity: %s',
self, sys.exc_info()[1])
return
context_id = self._router.id_allocator.allocate()
context = mitogen.parent.Context(self._router, context_id)
stream = mitogen.core.Stream(self._router, context_id)
stream.accept(sock.fileno(), sock.fileno())
stream.name = u'unix_client.%d' % (pid,)
stream.auth_id = mitogen.context_id
stream.is_privileged = True
try:
sock.send(struct.pack('>LLL', context_id, mitogen.context_id,
os.getpid()))
except socket.error:
LOG.error('%r: failed to assign identity to PID %d: %s',
self, pid, sys.exc_info()[1])
return
stream.accept(sock.fileno(), sock.fileno())
self._router.register(context, stream)
sock.send(struct.pack('>LLL', context_id, mitogen.context_id,
os.getpid()))
sock.close()
def on_receive(self, broker):
sock, _ = self._sock.accept()
try:
self._accept_client(sock)
finally:
sock.close()
def connect(path, broker=None):

@ -4,6 +4,7 @@ contexts.
"""
import inspect
import sys
import zlib
import mitogen.fakessh
@ -24,6 +25,10 @@ print('Preamble size: %s (%.2fKiB)' % (
len(stream.get_preamble()),
len(stream.get_preamble()) / 1024.0,
))
if '--dump' in sys.argv:
print(zlib.decompress(stream.get_preamble()))
exit()
print(
' '

@ -6,15 +6,32 @@ echo '-------------------'
echo
set -o errexit
set -o nounset
set -o pipefail
UNIT2="$(which unit2)"
coverage erase
coverage run "${UNIT2}" discover \
--start-directory "tests" \
--pattern '*_test.py' \
"$@"
# First run overwites coverage output.
[ "$SKIP_MITOGEN" ] || {
coverage run "${UNIT2}" discover \
--start-directory "tests" \
--pattern '*_test.py' \
"$@"
}
# Second run appends. This is since 'discover' treats subdirs as packages and
# the 'ansible' subdir shadows the real Ansible package when it contains
# __init__.py, so hack around it by just running again with 'ansible' as the
# start directory. Alternative seems to be renaming tests/ansible/ and making a
# mess of Git history.
[ "$SKIP_ANSIBLE" ] || {
export PYTHONPATH=`pwd`/tests:$PYTHONPATH
coverage run -a "${UNIT2}" discover \
--start-directory "tests/ansible" \
--pattern '*_test.py' \
"$@"
}
coverage html
echo coverage report is at "file://$(pwd)/htmlcov/index.html"

@ -73,13 +73,16 @@ also by Ansible's `osx_setup.yml`.
used to target this account, the parent session requires a TTY and the
account password must be entered.
`mitogen__user1` .. `mitogen__user21`
`mitogen__user1` .. `mitogen__user5`
These accounts do not have passwords set. They exist to test the Ansible
interpreter recycling logic.
`mitogen__sudo1` .. `mitogen__sudo4`
May passwordless sudo to any account.
`mitogen__webapp`
A plain old account with no sudo access, used as the target for fakessh
tddests.
tests.
# Ansible Integration Test Environment

@ -1,2 +1,3 @@
lib/modules/custom_binary_producing_junk
lib/modules/custom_binary_producing_json
hosts/*.local

@ -1,10 +1,16 @@
all: \
lib/modules/custom_binary_producing_junk \
lib/modules/custom_binary_producing_json
SYSTEM=$(shell uname -s)
lib/modules/custom_binary_producing_junk: lib/modules.src/custom_binary_producing_junk.c
TARGETS+=lib/modules/custom_binary_producing_junk_$(SYSTEM)
TARGETS+=lib/modules/custom_binary_producing_json_$(SYSTEM)
all: clean $(TARGETS)
lib/modules/custom_binary_producing_junk_$(SYSTEM): lib/modules.src/custom_binary_producing_junk.c
$(CC) -o $@ $<
lib/modules/custom_binary_producing_json: lib/modules.src/custom_binary_producing_json.c
lib/modules/custom_binary_producing_json_$(SYSTEM): lib/modules.src/custom_binary_producing_json.c
$(CC) -o $@ $<
clean:
rm -f $(TARGETS)

@ -1,5 +1,5 @@
# ``tests/ansible`` Directory
# `tests/ansible` Directory
This is an an organically growing collection of integration and regression
tests used for development and end-user bug reports.
@ -10,10 +10,10 @@ demonstrator for what does and doesn't work.
## Preparation
For OS X, run the ``osx_setup.yml`` script to create a bunch of users.
See `../image_prep/README.md`.
## ``run_ansible_playbook.sh``
## `run_ansible_playbook.sh`
This is necessary to set some environment variables used by future tests, as
there appears to be no better way to inject them into the top-level process
@ -22,6 +22,19 @@ environment before the Mitogen connection process forks.
## Running Everything
```
ANSIBLE_STRATEGY=mitogen_linear ./run_ansible_playbook.sh all.yml
```
`ANSIBLE_STRATEGY=mitogen_linear ./run_ansible_playbook.sh all.yml`
## `hosts/` and `common-hosts`
To support running the tests against a dev machine that has the requisite user
accounts, the the default inventory is a directory containing a 'localhost'
file that defines 'localhost' to be named 'target' in Ansible inventory, and a
symlink to 'common-hosts', which defines additional targets that all derive
from 'target'.
This allows `ansible_tests.sh` to reuse the common-hosts definitions while
replacing localhost as the test target by creating a new directory that
similarly symlinks in common-hosts.
There may be a better solution for this, but it works fine for now.

@ -7,9 +7,12 @@ callback_plugins = lib/callback
stdout_callback = nice_stdout
vars_plugins = lib/vars
library = lib/modules
# module_utils = lib/module_utils
module_utils = lib/module_utils
retry_files_enabled = False
forks = 50
display_args_to_stdout = True
forks = 100
no_target_syslog = True
# Required by integration/ssh/timeouts.yml
timeout = 10
@ -17,10 +20,6 @@ timeout = 10
# On Travis, paramiko check fails due to host key checking enabled.
host_key_checking = False
# "mitogen-tests" required by integration/runner/remote_tmp.yml
# "$HOME" required by integration/action/make_tmp_path.yml
remote_tmp = $HOME/.ansible/mitogen-tests/
[ssh_connection]
ssh_args = -o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s
pipelining = True

@ -0,0 +1,10 @@
# Execute 'hostname' 100 times in a loop. Loops execute within TaskExecutor
# within a single WorkerProcess, each iteration is a fair approximation of the
# non-controller overhead involved in executing a task.
#
# See also: loop-100-tasks.yml
#
- hosts: all
tasks:
- command: hostname
with_sequence: start=1 end=100

@ -0,0 +1,112 @@
# Execute 'hostname' 100 times, using 100 individual tasks. Each task causes a
# new WorkerProcess to be forked, along with get_vars() calculation, and in the
# Mitogen extension, reestablishment of the UNIX socket connectionto the
# multiplexer process.
#
# It does not measure at least module dependency scanning (cached after first
# iteration).
#
# See also: loop-100-items.yml
#
- hosts: all
tasks:
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname
- command: hostname

@ -0,0 +1,14 @@
- hosts: all
tasks:
- file:
dest: /tmp/templates
state: "{{item}}"
with_items: ["absent", "directory"]
- copy:
dest: /tmp/templates/{{item}}
mode: 0755
content:
Hello from {{item}}
with_sequence: start=1 end=20

@ -6,7 +6,6 @@ import re
import subprocess
import tempfile
LOG = logging.getLogger(__name__)
suffixes = [
@ -42,21 +41,22 @@ def run(s):
return fp.read()
logging.basicConfig(level=logging.DEBUG)
for suffix in suffixes:
ansible = run('ansible localhost %s' % (suffix,))
mitogen = run('ANSIBLE_STRATEGY=mitogen ansible localhost %s' % (suffix,))
diff = list(difflib.unified_diff(
a=fixup(ansible).splitlines(),
b=fixup(mitogen).splitlines(),
fromfile='ansible-output.txt',
tofile='mitogen-output.txt',
))
if diff:
print('++ differ! suffix: %r' % (suffix,))
for line in diff:
print(line)
print
print
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG)
for suffix in suffixes:
ansible = run('ansible localhost %s' % (suffix,))
mitogen = run('ANSIBLE_STRATEGY=mitogen ansible localhost %s' % (suffix,))
diff = list(difflib.unified_diff(
a=fixup(ansible).splitlines(),
b=fixup(mitogen).splitlines(),
fromfile='ansible-output.txt',
tofile='mitogen-output.txt',
))
if diff:
print('++ differ! suffix: %r' % (suffix,))
for line in diff:
print(line)
print
print

@ -1,6 +1,28 @@
- hosts: controller
vars:
git_username: '{{ lookup("pipe", "git config --global user.name") }}'
git_email: '{{ lookup("pipe", "git config --global user.email") }}'
tasks:
- lineinfile:
line: "{{item}}"
path: /etc/sysctl.conf
register: sysctl_conf
become: true
with_items:
- "net.ipv4.ip_forward=1"
- "kernel.perf_event_paranoid=-1"
- copy:
src: ~/.ssh/id_gitlab
dest: ~/.ssh/id_gitlab
mode: 0600
- template:
dest: ~/.ssh/config
src: ssh_config.j2
- lineinfile:
line: "net.ipv4.ip_forward=1"
path: /etc/sysctl.conf
@ -32,6 +54,11 @@
- shell: "rsync -a ~/.ssh {{inventory_hostname}}:"
connection: local
- shell: |
git config --global user.email "{{git_username}}"
git config --global user.name "{{git_email}}"
name: set_git_config
- git:
dest: ~/mitogen
repo: https://github.com/dw/mitogen.git
@ -56,6 +83,10 @@
editable: true
name: ~/ansible
- pip:
virtualenv: ~/venv
name: debops
- lineinfile:
line: "source $HOME/venv/bin/activate"
path: ~/.profile

@ -1,2 +1,2 @@
[controller]
35.206.145.240
c

@ -0,0 +1,19 @@
[defaults]
inventory = hosts,~/mitogen/tests/ansible/lib/inventory
gathering = explicit
strategy_plugins = ~/mitogen/ansible_mitogen/plugins/strategy
action_plugins = ~/mitogen/tests/ansible/lib/action
callback_plugins = ~/mitogen/tests/ansible/lib/callback
stdout_callback = nice_stdout
vars_plugins = ~/mitogen/tests/ansible/lib/vars
library = ~/mitogen/tests/ansible/lib/modules
retry_files_enabled = False
forks = 50
strategy = mitogen_linear
host_key_checking = False
[ssh_connection]
ssh_args = -o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s
pipelining = True

@ -0,0 +1,6 @@
Host localhost-*
Hostname localhost
Host gitlab.com
IdentityFile ~/.ssh/id_gitlab

@ -1,100 +0,0 @@
mydeb9-1 ansible_connection=docker
mydeb9-2 ansible_connection=docker
mydeb9-3 ansible_connection=docker
mydeb9-4 ansible_connection=docker
mydeb9-5 ansible_connection=docker
mydeb9-6 ansible_connection=docker
mydeb9-7 ansible_connection=docker
mydeb9-8 ansible_connection=docker
mydeb9-9 ansible_connection=docker
mydeb9-10 ansible_connection=docker
mydeb9-11 ansible_connection=docker
mydeb9-12 ansible_connection=docker
mydeb9-13 ansible_connection=docker
mydeb9-14 ansible_connection=docker
mydeb9-15 ansible_connection=docker
mydeb9-16 ansible_connection=docker
mydeb9-17 ansible_connection=docker
mydeb9-18 ansible_connection=docker
mydeb9-19 ansible_connection=docker
mydeb9-20 ansible_connection=docker
mydeb9-21 ansible_connection=docker
mydeb9-22 ansible_connection=docker
mydeb9-23 ansible_connection=docker
mydeb9-24 ansible_connection=docker
mydeb9-25 ansible_connection=docker
mydeb9-26 ansible_connection=docker
mydeb9-27 ansible_connection=docker
mydeb9-28 ansible_connection=docker
mydeb9-29 ansible_connection=docker
mydeb9-30 ansible_connection=docker
mydeb9-31 ansible_connection=docker
mydeb9-32 ansible_connection=docker
mydeb9-33 ansible_connection=docker
mydeb9-34 ansible_connection=docker
mydeb9-35 ansible_connection=docker
mydeb9-36 ansible_connection=docker
mydeb9-37 ansible_connection=docker
mydeb9-38 ansible_connection=docker
mydeb9-39 ansible_connection=docker
mydeb9-40 ansible_connection=docker
mydeb9-41 ansible_connection=docker
mydeb9-42 ansible_connection=docker
mydeb9-43 ansible_connection=docker
mydeb9-44 ansible_connection=docker
mydeb9-45 ansible_connection=docker
mydeb9-46 ansible_connection=docker
mydeb9-47 ansible_connection=docker
mydeb9-48 ansible_connection=docker
mydeb9-49 ansible_connection=docker
mydeb9-50 ansible_connection=docker
mydeb9-51 ansible_connection=docker
mydeb9-52 ansible_connection=docker
mydeb9-53 ansible_connection=docker
mydeb9-54 ansible_connection=docker
mydeb9-55 ansible_connection=docker
mydeb9-56 ansible_connection=docker
mydeb9-57 ansible_connection=docker
mydeb9-58 ansible_connection=docker
mydeb9-59 ansible_connection=docker
mydeb9-60 ansible_connection=docker
mydeb9-61 ansible_connection=docker
mydeb9-62 ansible_connection=docker
mydeb9-63 ansible_connection=docker
mydeb9-64 ansible_connection=docker
mydeb9-65 ansible_connection=docker
mydeb9-66 ansible_connection=docker
mydeb9-67 ansible_connection=docker
mydeb9-68 ansible_connection=docker
mydeb9-69 ansible_connection=docker
mydeb9-70 ansible_connection=docker
mydeb9-71 ansible_connection=docker
mydeb9-72 ansible_connection=docker
mydeb9-73 ansible_connection=docker
mydeb9-74 ansible_connection=docker
mydeb9-75 ansible_connection=docker
mydeb9-76 ansible_connection=docker
mydeb9-77 ansible_connection=docker
mydeb9-78 ansible_connection=docker
mydeb9-79 ansible_connection=docker
mydeb9-80 ansible_connection=docker
mydeb9-81 ansible_connection=docker
mydeb9-82 ansible_connection=docker
mydeb9-83 ansible_connection=docker
mydeb9-84 ansible_connection=docker
mydeb9-85 ansible_connection=docker
mydeb9-86 ansible_connection=docker
mydeb9-87 ansible_connection=docker
mydeb9-88 ansible_connection=docker
mydeb9-89 ansible_connection=docker
mydeb9-90 ansible_connection=docker
mydeb9-91 ansible_connection=docker
mydeb9-92 ansible_connection=docker
mydeb9-93 ansible_connection=docker
mydeb9-94 ansible_connection=docker
mydeb9-95 ansible_connection=docker
mydeb9-96 ansible_connection=docker
mydeb9-97 ansible_connection=docker
mydeb9-98 ansible_connection=docker
mydeb9-99 ansible_connection=docker
mydeb9-100 ansible_connection=docker

@ -0,0 +1,43 @@
# vim: syntax=dosini
# This must be defined explicitly, otherwise _create_implicit_localhost()
# generates its own copy, which includes an ansible_python_interpreter that
# varies according to host machine.
localhost
[connection-delegation-test]
cd-bastion
cd-rack11 mitogen_via=ssh-user@cd-bastion
cd-rack11a mitogen_via=root@cd-rack11
cd-rack11a-docker mitogen_via=docker-admin@cd-rack11a ansible_connection=docker
[connection-delegation-cycle]
# Create cycle with Docker container.
cdc-bastion mitogen_via=cdc-rack11a-docker
cdc-rack11 mitogen_via=ssh-user@cdc-bastion
cdc-rack11a mitogen_via=root@cdc-rack11
cdc-rack11a-docker mitogen_via=docker-admin@cdc-rack11a ansible_connection=docker
[conn-delegation]
cd-user1 ansible_user=mitogen__user1 ansible_connection=mitogen_sudo mitogen_via=target
# Connection delegation scenarios. It's impossible to connection to them, but
# you can inspect the would-be config via "mitogen_get_stack" action.
[cd-no-connect]
# Normal inventory host, no aliasing.
cd-normal ansible_connection=mitogen_doas ansible_user=normal-user
# Inventory host that is really a different host.
cd-alias ansible_connection=ssh ansible_user=alias-user ansible_host=alias-host
# Via one normal host.
cd-normal-normal mitogen_via=cd-normal
# Via one aliased host.
cd-normal-alias mitogen_via=cd-alias
# newuser@host via host with explicit username.
cd-newuser-normal-normal mitogen_via=cd-normal ansible_user=newuser-normal-normal-user
# doas:newuser via host.
cd-newuser-doas-normal mitogen_via=cd-normal ansible_connection=mitogen_doas ansible_user=newuser-doas-normal-user

@ -1,7 +1,3 @@
[test-targets]
localhost
[connection-delegation-test]
cd-bastion
cd-rack11 mitogen_via=ssh-user@cd-bastion

@ -0,0 +1,4 @@
---
ansible_connection: setns
mitogen_kind: lxc

@ -0,0 +1,12 @@
# Connection Delegation issue #340 reproduction.
# Path to jails is SSH to H -> mitogen_sudo to root -> jail to J
[issue340]
# 'target' plays the role of the normal host machine H.
# 'mitogen__sudo1' plays the role of root@H via mitogen_sudo.
# 'mitogen__user1' plays the role of root@J via mitogen__user1.
# 'mitogen__user2' plays the role of E, the delgate_to target for certs.
i340-root ansible_user=mitogen__sudo1 ansible_connection=mitogen_sudo mitogen_via=target
i340-jail ansible_user=mitogen__user1 ansible_connection=mitogen_sudo mitogen_via=i340-root
i340-certs ansible_user=mitogen__user2 ansible_connection=mitogen_sudo mitogen_via=target

@ -0,0 +1,25 @@
k3
[k3-x10]
k3-[01:10]
[k3-x20]
k3-[01:20]
[k3-x50]
k3-[01:50]
[k3-x100]
k3-[001:100]
[k3-x200]
k3-[001:200]
[k3-x300]
k3-[001:300]
[k3-x400]
k3-[001:400]
[k3-x500]
k3-[001:500]

@ -0,0 +1,8 @@
localhost
target ansible_host=localhost
[test-targets]
target
[localhost-x10]
localhost-[01:10]

@ -0,0 +1,10 @@
nessy
[nessy-x10]
nessy-[00:10]
[nessy-x20]
nessy-[00:20]
[nessy-x50]
nessy-[00:50]

@ -0,0 +1,9 @@
# integration/delegation/delegate_to_container.yml
# Patterned after openstack-ansible/all_containers.yml
osa-host-machine ansible_host=172.29.236.100
[osa-all-containers]
osa-container-1 container_tech=lxc
osa-container-2 container_tech=lxc
osa-container-3 container_tech=lxc

@ -1,5 +1,9 @@
- import_playbook: remote_file_exists.yml
- import_playbook: remote_expand_user.yml
- import_playbook: copy.yml
- import_playbook: fixup_perms2__copy.yml
- import_playbook: low_level_execute_command.yml
- import_playbook: make_tmp_path.yml
- import_playbook: remote_expand_user.yml
- import_playbook: remote_file_exists.yml
- import_playbook: remove_tmp_path.yml
- import_playbook: synchronize.yml
- import_playbook: transfer_data.yml

@ -0,0 +1,83 @@
# Verify copy module for small and large files, and inline content.
- name: integration/action/synchronize.yml
hosts: test-targets
any_errors_fatal: true
tasks:
- copy:
dest: /tmp/copy-tiny-file
content:
this is a tiny file.
connection: local
- copy:
dest: /tmp/copy-large-file
# Must be larger than Connection.SMALL_SIZE_LIMIT.
content: "{% for x in range(200000) %}x{% endfor %}"
connection: local
# end of making files
- file:
state: absent
path: "{{item}}"
with_items:
- /tmp/copy-tiny-file.out
- /tmp/copy-large-file.out
- /tmp/copy-tiny-inline-file.out
- /tmp/copy-large-inline-file.out
# end of cleaning out files
- copy:
dest: /tmp/copy-large-file.out
src: /tmp/copy-large-file
- copy:
dest: /tmp/copy-tiny-file.out
src: /tmp/copy-tiny-file
- copy:
dest: /tmp/copy-tiny-inline-file.out
content: "tiny inline content"
- copy:
dest: /tmp/copy-large-inline-file.out
content: |
{% for x in range(200000) %}y{% endfor %}
# stat results
- stat:
path: "{{item}}"
with_items:
- /tmp/copy-tiny-file.out
- /tmp/copy-large-file.out
- /tmp/copy-tiny-inline-file.out
- /tmp/copy-large-inline-file.out
register: stat
- assert:
that:
- stat.results[0].stat.checksum == "f29faa9a6f19a700a941bf2aa5b281643c4ec8a0"
- stat.results[1].stat.checksum == "62951f943c41cdd326e5ce2b53a779e7916a820d"
- stat.results[2].stat.checksum == "b26dd6444595e2bdb342aa0a91721b57478b5029"
- stat.results[3].stat.checksum == "d675f47e467eae19e49032a2cc39118e12a6ee72"
- file:
state: absent
path: "{{item}}"
with_items:
- /tmp/copy-tiny-file
- /tmp/copy-tiny-file.out
- /tmp/copy-no-mode
- /tmp/copy-no-mode.out
- /tmp/copy-with-mode
- /tmp/copy-with-mode.out
- /tmp/copy-large-file
- /tmp/copy-large-file.out
- /tmp/copy-tiny-inline-file.out
- /tmp/copy-large-inline-file
- /tmp/copy-large-inline-file.out
# end of cleaning out files (again)

@ -0,0 +1,117 @@
# Verify action plugins still set file modes correctly even though
# fixup_perms2() avoids setting execute bit despite being asked to.
- name: integration/action/fixup_perms2__copy.yml
hosts: test-targets
any_errors_fatal: true
tasks:
- name: Get default remote file mode
shell: python -c 'import os; print("%04o" % (int("0666", 8) & ~os.umask(0)))'
register: py_umask
- name: Set default file mode
set_fact:
mode: "{{py_umask.stdout}}"
#
# copy module (no mode).
#
- name: "Copy files (no mode)"
copy:
content: ""
dest: /tmp/copy-no-mode
- stat: path=/tmp/copy-no-mode
register: out
- assert:
that:
- out.stat.mode == mode
#
# copy module (explicit mode).
#
- name: "Copy files from content: arg"
copy:
content: ""
mode: 0400
dest: /tmp/copy-with-mode
- stat: path=/tmp/copy-with-mode
register: out
- assert:
that:
- out.stat.mode == "0400"
#
# copy module (existing disk files, no mode).
#
- file:
path: /tmp/weird-mode.out
state: absent
- name: Create local test file.
connection: local
copy:
content: "weird mode"
dest: "/tmp/weird-mode"
mode: "1462"
- copy:
src: "/tmp/weird-mode"
dest: "/tmp/weird-mode.out"
- stat:
path: "/tmp/weird-mode.out"
register: out
- assert:
that:
- out.stat.mode == mode
#
# copy module (existing disk files, preserve mode).
#
- copy:
src: "/tmp/weird-mode"
dest: "/tmp/weird-mode"
mode: preserve
- stat:
path: "/tmp/weird-mode"
register: out
- assert:
that:
- out.stat.mode == "1462"
#
# copy module (existing disk files, explicit mode).
#
- copy:
src: "/tmp/weird-mode"
dest: "/tmp/weird-mode"
mode: "1461"
- stat:
path: "/tmp/weird-mode"
register: out
- assert:
that:
- out.stat.mode == "1461"
- file:
state: absent
path: "{{item}}"
with_items:
- /tmp/weird-mode
- /tmp/weird-mode.out
- /tmp/copy-no-mode
- /tmp/copy-no-mode.out
- /tmp/copy-with-mode
- /tmp/copy-with-mode.out
# end of cleaning out files

@ -23,7 +23,6 @@
register: raw
# Can't test stdout because TTY inserts \r in Ansible version.
- debug: msg={{raw}}
- name: Verify raw module output.
assert:
that:

@ -1,63 +1,156 @@
#
# Ensure _make_tmp_path returns the same result across invocations for a single
# user account, and that the path returned cleans itself up on connection
# termination.
#
# Related bugs prior to the new-style handling:
# https://github.com/dw/mitogen/issues/239
# https://github.com/dw/mitogen/issues/301
- name: integration/action/make_tmp_path.yml
hosts: test-targets
any_errors_fatal: true
tasks:
- name: "Find out root's homedir."
# Runs first because it blats regular Ansible facts with junk, so
# non-become run fixes that up.
setup: gather_subset=min
become: true
register: root_facts
- name: "Find regular homedir"
setup: gather_subset=min
register: user_facts
- meta: end_play
when: not is_mitogen
#
# non-become
# non-root
#
- action_passthrough:
- name: "Find regular temp path"
action_passthrough:
method: _make_tmp_path
register: tmp_path
- name: "Find regular temp path (new task)"
action_passthrough:
method: _make_tmp_path
register: tmp_path2
- name: "Find good temp path"
set_fact:
good_temp_path: "{{tmp_path.result|dirname}}"
- name: "Find good temp path (new task)"
set_fact:
good_temp_path2: "{{tmp_path2.result|dirname}}"
- name: "Verify common base path for both tasks"
assert:
that:
- good_temp_path == good_temp_path2
- name: "Verify different subdir for both tasks"
assert:
that:
- tmp_path.result != tmp_path2.result
#
# Verify subdirectory removal.
#
- name: Stat temp path
stat:
path: "{{tmp_path.result}}"
register: stat1
- name: Stat temp path (new task)
stat:
path: "{{tmp_path2.result}}"
register: stat2
- name: "Verify neither subdir exists any more"
assert:
that:
- not stat1.stat.exists
- not stat2.stat.exists
#
# Verify good directory persistence.
#
- name: Stat good temp path (new task)
stat:
path: "{{good_temp_path}}"
register: stat
- name: "Verify good temp path is persistent"
assert:
that:
- stat.stat.exists
#
# Write some junk into the temp path.
#
- name: "Write junk to temp path and verify it disappears"
custom_python_run_script:
script: |
from ansible.module_utils.basic import get_module_path
path = get_module_path() + '/foo.txt'
result['path'] = path
open(path, 'w').write("bar")
register: out
- name: "Verify junk disappeared."
stat:
path: "{{out.path}}"
register: out
- assert:
# This string must match ansible.cfg::remote_tmp
that: out.result.startswith("{{user_facts.ansible_facts.ansible_user_dir}}/.ansible/mitogen-tests/")
that:
- not out.stat.exists
- stat:
path: "{{out.result}}"
register: st
#
# root
#
- assert:
that: st.stat.exists and st.stat.isdir and st.stat.mode == "0700"
- name: "Find root temp path"
become: true
action_passthrough:
method: _make_tmp_path
register: tmp_path_root
- file:
path: "{{out.result}}"
state: absent
- name: "Verify root temp path differs from regular path"
assert:
that:
- tmp_path2.result != tmp_path_root.result
#
# become. make_tmp_path() must evaluate HOME in the context of the SSH
# user, not the become user.
# readonly homedir
#
- action_passthrough:
method: _make_tmp_path
register: out
- name: "Try writing to temp directory for the readonly_homedir user"
become: true
become_user: mitogen__readonly_homedir
custom_python_run_script:
script: |
from ansible.module_utils.basic import get_module_path
path = get_module_path() + '/foo.txt'
result['path'] = path
open(path, 'w').write("bar")
register: tmp_path
- assert:
# This string must match ansible.cfg::remote_tmp
that: out.result.startswith("{{user_facts.ansible_facts.ansible_user_dir}}/.ansible/mitogen-tests/")
#
# modules get the same base dir
#
- stat:
path: "{{out.result}}"
register: st
- name: "Verify modules get the same tmpdir as the action plugin"
custom_python_detect_environment:
register: out
- assert:
that: st.stat.exists and st.stat.isdir and st.stat.mode == "0700"
# v2.6 related: https://github.com/ansible/ansible/pull/39833
- name: "Verify modules get the same tmpdir as the action plugin (<2.5)"
when: ansible_version.full < '2.5'
assert:
that:
- out.module_path.startswith(good_temp_path2)
- out.module_tmpdir == None
- file:
path: "{{out.result}}"
state: absent
- name: "Verify modules get the same tmpdir as the action plugin (>2.5)"
when: ansible_version.full > '2.5'
assert:
that:
- out.module_path.startswith(good_temp_path2)
- out.module_tmpdir.startswith(good_temp_path2)

@ -0,0 +1,40 @@
#
# Ensure _remove_tmp_path cleans up the temporary path.
#
#
- name: integration/action/remove_tmp_path.yml
hosts: test-targets
any_errors_fatal: true
tasks:
- meta: end_play
when: not is_mitogen
#
# Use the copy module to cause a temporary directory to be created, and
# return a result with a 'src' attribute pointing into that directory.
#
- copy:
dest: /tmp/remove_tmp_path_test
content: "{{ 123123 | random }}"
register: out
- stat:
path: "{{out.src}}"
register: out2
- assert:
that:
- not out2.stat.exists
- stat:
path: "{{out.src|dirname}}"
register: out2
- assert:
that:
- not out2.stat.exists
- file:
path: /tmp/remove_tmp_path_test
state: absent

@ -0,0 +1,58 @@
# Verify basic operation of the synchronize module.
- name: integration/action/synchronize.yml
hosts: test-targets
any_errors_fatal: true
vars:
ansible_user: mitogen__has_sudo_pubkey
ansible_ssh_private_key_file: /tmp/synchronize-action-key
tasks:
# must copy git file to set proper file mode.
- copy:
dest: /tmp/synchronize-action-key
src: ../../../data/docker/mitogen__has_sudo_pubkey.key
mode: u=rw,go=
connection: local
- file:
path: /tmp/sync-test
state: absent
connection: local
- file:
path: /tmp/sync-test
state: directory
connection: local
- copy:
dest: /tmp/sync-test/item
content: "item!"
connection: local
- file:
path: /tmp/sync-test.out
state: absent
become: true
- synchronize:
private_key: /tmp/synchronize-action-key
dest: /tmp/sync-test.out
src: /tmp/sync-test/
- slurp:
src: /tmp/sync-test.out/item
register: out
- set_fact: outout="{{out.content|b64decode}}"
- assert:
that: outout == "item!"
- file:
path: "{{item}}"
state: absent
become: true
with_items:
- /tmp/synchronize-action-key
- /tmp/sync-test
- /tmp/sync-test.out

@ -37,8 +37,6 @@
src: /tmp/transfer-data
register: out
- debug: msg={{out}}
- assert:
that:
out.content|b64decode == 'I am text.'

@ -6,13 +6,14 @@
- import_playbook: action/all.yml
- import_playbook: async/all.yml
- import_playbook: become/all.yml
- import_playbook: connection/all.yml
- import_playbook: connection_loader/all.yml
- import_playbook: context_service/all.yml
- import_playbook: delegation/all.yml
- import_playbook: glibc_caches/all.yml
- import_playbook: local/all.yml
#- import_playbook: module_utils/all.yml
- import_playbook: module_utils/all.yml
- import_playbook: playbook_semantics/all.yml
- import_playbook: remote_tmp/all.yml
- import_playbook: runner/all.yml
- import_playbook: ssh/all.yml
- import_playbook: strategy/all.yml
- import_playbook: glibc_caches/all.yml

@ -5,10 +5,21 @@
any_errors_fatal: true
tasks:
- custom_binary_producing_json:
async: 100
poll: 0
register: job
- block:
- custom_binary_producing_json_Darwin:
async: 100
poll: 0
register: job_darwin
- set_fact: job={{job_darwin}}
when: ansible_system == "Darwin"
- block:
- custom_binary_producing_json_Linux:
async: 100
poll: 0
register: job_linux
- set_fact: job={{job_linux}}
when: ansible_system == "Linux"
- assert:
that: |
@ -30,9 +41,9 @@
src: "{{ansible_user_dir}}/.ansible_async/{{job.ansible_job_id}}"
register: result
- debug: msg={{async_out}}
vars:
async_out: "{{result.content|b64decode|from_json}}"
#- debug: msg={{async_out}}
#vars:
#async_out: "{{result.content|b64decode|from_json}}"
- assert:
that:

@ -5,10 +5,21 @@
any_errors_fatal: true
tasks:
- custom_binary_producing_junk:
async: 100
poll: 0
register: job
- block:
- custom_binary_producing_junk_Darwin:
async: 100
poll: 0
register: job_darwin
- set_fact: job={{job_darwin}}
when: ansible_system == "Darwin"
- block:
- custom_binary_producing_junk_Linux:
async: 100
poll: 0
register: job_linux
- set_fact: job={{job_linux}}
when: ansible_system == "Linux"
- shell: sleep 1
@ -16,9 +27,9 @@
src: "{{ansible_user_dir}}/.ansible_async/{{job.ansible_job_id}}"
register: result
- debug: msg={{async_out}}
vars:
async_out: "{{result.content|b64decode|from_json}}"
#- debug: msg={{async_out}}
#vars:
#async_out: "{{result.content|b64decode|from_json}}"
- assert:
that:

@ -16,9 +16,9 @@
src: "{{ansible_user_dir}}/.ansible_async/{{job.ansible_job_id}}"
register: result
- debug: msg={{async_out}}
vars:
async_out: "{{result.content|b64decode|from_json}}"
#- debug: msg={{async_out}}
#vars:
#async_out: "{{result.content|b64decode|from_json}}"
- assert:
that:

@ -11,12 +11,11 @@
vars:
ansible_become_flags: --derps
- debug: msg={{out}}
- name: Verify raw module output.
assert:
that:
- out.failed
- |
('sudo: no such option: --derps' in out.msg) or
("sudo: unrecognized option `--derps'" in out.module_stderr) or
("sudo: unrecognized option `--derps'" in out.module_stderr) or
("sudo: unrecognized option '--derps'" in out.module_stderr)

@ -0,0 +1,22 @@
---
- shell: dd if=/dev/urandom of=/tmp/{{file_name}} bs=1024 count={{file_size}}
args:
creates: /tmp/{{file_name}}
connection: local
- copy:
dest: /tmp/{{file_name}}.out
src: /tmp/{{file_name}}
- stat: path=/tmp/{{file_name}}
register: original
connection: local
- stat: path=/tmp/{{file_name}}.out
register: copied
- assert:
that:
- original.stat.checksum == copied.stat.checksum
- original.stat.mtime|int == copied.stat.mtime|int

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