You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
524 lines
21 KiB
Python
524 lines
21 KiB
Python
# Copyright 2019, 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.
|
|
|
|
from __future__ import absolute_import
|
|
import logging
|
|
import os
|
|
import pwd
|
|
import random
|
|
import traceback
|
|
|
|
try:
|
|
from shlex import quote as shlex_quote
|
|
except ImportError:
|
|
from pipes import quote as shlex_quote
|
|
|
|
from ansible.module_utils._text import to_bytes
|
|
from ansible.parsing.utils.jsonify import jsonify
|
|
|
|
import ansible
|
|
import ansible.constants
|
|
import ansible.plugins
|
|
import ansible.plugins.action
|
|
|
|
import mitogen.core
|
|
import mitogen.select
|
|
import mitogen.utils
|
|
|
|
import ansible_mitogen.connection
|
|
import ansible_mitogen.planner
|
|
import ansible_mitogen.target
|
|
import ansible_mitogen.utils
|
|
|
|
from ansible.module_utils._text import to_text
|
|
|
|
try:
|
|
from ansible.utils.unsafe_proxy import wrap_var
|
|
except ImportError:
|
|
from ansible.vars.unsafe_proxy import wrap_var
|
|
|
|
try:
|
|
# ansible 2.8 moved remove_internal_keys to the clean module
|
|
from ansible.vars.clean import remove_internal_keys
|
|
except ImportError:
|
|
try:
|
|
from ansible.vars.manager import remove_internal_keys
|
|
except ImportError:
|
|
# ansible 2.3.3 has remove_internal_keys as a protected func on the action class
|
|
# we'll fallback to calling self._remove_internal_keys in this case
|
|
remove_internal_keys = lambda a: "Not found"
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class ActionModuleMixin(ansible.plugins.action.ActionBase):
|
|
"""
|
|
The Mitogen-patched PluginLoader dynamically mixes this into every action
|
|
class that Ansible attempts to load. It exists to override all the
|
|
assumptions built into the base action class that should really belong in
|
|
some middle layer, or at least in the connection layer.
|
|
|
|
Functionality is defined here for:
|
|
|
|
* Capturing the final set of task variables and giving Connection a chance
|
|
to update its idea of the correct execution environment, before any
|
|
attempt is made to call a Connection method. While it's not expected for
|
|
the interpreter to change on a per-task basis, Ansible permits this, and
|
|
so it must be supported.
|
|
|
|
* Overriding lots of methods that try to call out to shell for mundane
|
|
reasons, such as copying files around, changing file permissions,
|
|
creating temporary directories and suchlike.
|
|
|
|
* Short-circuiting any use of Ansiballz or related code for executing a
|
|
module remotely using shell commands and SSH.
|
|
|
|
* Short-circuiting most of the logic in dealing with the fact that Ansible
|
|
always runs become: tasks across at least the SSH user account and the
|
|
destination user account, and handling the security permission issues
|
|
that crop up due to this. Mitogen always runs a task completely within
|
|
the target user account, so it's not a problem for us.
|
|
"""
|
|
def __init__(self, task, connection, *args, **kwargs):
|
|
"""
|
|
Verify the received connection is really a Mitogen connection. If not,
|
|
transmute this instance back into the original unadorned base class.
|
|
|
|
This allows running the Mitogen strategy in mixed-target playbooks,
|
|
where some targets use SSH while others use WinRM or some fancier UNIX
|
|
connection plug-in. That's because when the Mitogen strategy is active,
|
|
ActionModuleMixin is unconditionally mixed into any action module that
|
|
is instantiated, and there is no direct way for the monkey-patch to
|
|
know what kind of connection will be used upfront.
|
|
"""
|
|
super(ActionModuleMixin, self).__init__(task, connection, *args, **kwargs)
|
|
if not isinstance(connection, ansible_mitogen.connection.Connection):
|
|
_, self.__class__ = type(self).__bases__
|
|
|
|
# required for python interpreter discovery
|
|
connection.templar = self._templar
|
|
self._finding_python_interpreter = False
|
|
self._rediscovered_python = False
|
|
# redeclaring interpreter discovery vars here in case running ansible < 2.8.0
|
|
self._discovered_interpreter_key = None
|
|
self._discovered_interpreter = False
|
|
self._discovery_deprecation_warnings = []
|
|
self._discovery_warnings = []
|
|
|
|
def run(self, tmp=None, task_vars=None):
|
|
"""
|
|
Override run() to notify Connection of task-specific data, so it has a
|
|
chance to know e.g. the Python interpreter in use.
|
|
"""
|
|
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)
|
|
|
|
COMMAND_RESULT = {
|
|
'rc': 0,
|
|
'stdout': '',
|
|
'stdout_lines': [],
|
|
'stderr': ''
|
|
}
|
|
|
|
def fake_shell(self, func, stdout=False):
|
|
"""
|
|
Execute a function and decorate its return value in the style of
|
|
_low_level_execute_command(). This produces a return value that looks
|
|
like some shell command was run, when really func() was implemented
|
|
entirely in Python.
|
|
|
|
If the function raises :py:class:`mitogen.core.CallError`, this will be
|
|
translated into a failed shell command with a non-zero exit status.
|
|
|
|
:param func:
|
|
Function invoked as `func()`.
|
|
:returns:
|
|
See :py:attr:`COMMAND_RESULT`.
|
|
"""
|
|
dct = self.COMMAND_RESULT.copy()
|
|
try:
|
|
rc = func()
|
|
if stdout:
|
|
dct['stdout'] = repr(rc)
|
|
except mitogen.core.CallError:
|
|
LOG.exception('While emulating a shell command')
|
|
dct['rc'] = 1
|
|
dct['stderr'] = traceback.format_exc()
|
|
|
|
return dct
|
|
|
|
def _remote_file_exists(self, path):
|
|
"""
|
|
Determine if `path` exists by directly invoking os.path.exists() in the
|
|
target user account.
|
|
"""
|
|
LOG.debug('_remote_file_exists(%r)', path)
|
|
return self._connection.get_chain().call(
|
|
ansible_mitogen.target.file_exists,
|
|
mitogen.utils.cast(path)
|
|
)
|
|
|
|
def _configure_module(self, module_name, module_args, task_vars=None):
|
|
"""
|
|
Mitogen does not use the Ansiballz framework. This call should never
|
|
happen when ActionMixin is active, so crash if it does.
|
|
"""
|
|
assert False, "_configure_module() should never be called."
|
|
|
|
def _is_pipelining_enabled(self, module_style, wrap_async=False):
|
|
"""
|
|
Mitogen does not use SSH pipelining. This call should never happen when
|
|
ActionMixin is active, so crash if it does.
|
|
"""
|
|
assert False, "_is_pipelining_enabled() should never be called."
|
|
|
|
def _generate_tmp_path(self):
|
|
return os.path.join(
|
|
self._connection.get_good_temp_dir(),
|
|
'ansible_mitogen_action_%016x' % (
|
|
random.getrandbits(8*8),
|
|
)
|
|
)
|
|
|
|
def _make_tmp_path(self, remote_user=None):
|
|
"""
|
|
Create a temporary subdirectory as a child of the temporary directory
|
|
managed by the remote interpreter.
|
|
"""
|
|
LOG.debug('_make_tmp_path(remote_user=%r)', remote_user)
|
|
path = self._generate_tmp_path()
|
|
LOG.debug('Temporary directory: %r', path)
|
|
self._connection.get_chain().call_no_reply(os.mkdir, path)
|
|
self._connection._shell.tmpdir = path
|
|
return path
|
|
|
|
def _remove_tmp_path(self, tmp_path):
|
|
"""
|
|
Replace the base implementation's invocation of rm -rf, replacing it
|
|
with a pipelined call to :func:`ansible_mitogen.target.prune_tree`.
|
|
"""
|
|
LOG.debug('_remove_tmp_path(%r)', tmp_path)
|
|
if tmp_path is None and ansible_mitogen.utils.ansible_version[:2] >= (2, 6):
|
|
tmp_path = self._connection._shell.tmpdir # 06f73ad578d
|
|
if tmp_path is not None:
|
|
self._connection.get_chain().call_no_reply(
|
|
ansible_mitogen.target.prune_tree,
|
|
tmp_path,
|
|
)
|
|
self._connection._shell.tmpdir = None
|
|
|
|
def _transfer_data(self, remote_path, data):
|
|
"""
|
|
Used by the base _execute_module(), and in <2.4 also by the template
|
|
action module, and probably others.
|
|
"""
|
|
if isinstance(data, dict):
|
|
data = jsonify(data)
|
|
if not isinstance(data, bytes):
|
|
data = to_bytes(data, errors='surrogate_or_strict')
|
|
|
|
LOG.debug('_transfer_data(%r, %s ..%d bytes)',
|
|
remote_path, type(data), len(data))
|
|
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
|
|
target user account, so it is never necessary to modify permissions
|
|
except to ensure the execute bit is set if requested.
|
|
"""
|
|
LOG.debug('_fixup_perms2(%r, remote_user=%r, execute=%r)',
|
|
remote_paths, remote_user, execute)
|
|
if execute and self._task.action not in self.FIXUP_PERMS_RED_HERRING:
|
|
return self._remote_chmod(remote_paths, mode='u+x')
|
|
return self.COMMAND_RESULT.copy()
|
|
|
|
def _remote_chmod(self, paths, mode, sudoable=False):
|
|
"""
|
|
Issue an asynchronous set_file_mode() call for every path in `paths`,
|
|
then format the resulting return value list with fake_shell().
|
|
"""
|
|
LOG.debug('_remote_chmod(%r, mode=%r, sudoable=%r)',
|
|
paths, mode, sudoable)
|
|
return self.fake_shell(lambda: mitogen.select.Select.all(
|
|
self._connection.get_chain().call_async(
|
|
ansible_mitogen.target.set_file_mode, path, mode
|
|
)
|
|
for path in paths
|
|
))
|
|
|
|
def _remote_chown(self, paths, user, sudoable=False):
|
|
"""
|
|
Issue an asynchronous os.chown() call for every path in `paths`, then
|
|
format the resulting return value list with fake_shell().
|
|
"""
|
|
LOG.debug('_remote_chown(%r, user=%r, sudoable=%r)',
|
|
paths, user, sudoable)
|
|
ent = self._connection.get_chain().call(pwd.getpwnam, user)
|
|
return self.fake_shell(lambda: mitogen.select.Select.all(
|
|
self._connection.get_chain().call_async(
|
|
os.chown, path, ent.pw_uid, ent.pw_gid
|
|
)
|
|
for path in paths
|
|
))
|
|
|
|
def _remote_expand_user(self, path, sudoable=True):
|
|
"""
|
|
Replace the base implementation's attempt to emulate
|
|
os.path.expanduser() with an actual call to os.path.expanduser().
|
|
|
|
:param bool sudoable:
|
|
If :data:`True`, indicate unqualified tilde ("~" with no username)
|
|
should be evaluated in the context of the login account, not any
|
|
become_user.
|
|
"""
|
|
LOG.debug('_remote_expand_user(%r, sudoable=%r)', path, sudoable)
|
|
if not path.startswith('~'):
|
|
# /home/foo -> /home/foo
|
|
return path
|
|
if sudoable or not self._play_context.become:
|
|
if path == '~':
|
|
# ~ -> /home/dmw
|
|
return self._connection.homedir
|
|
if path.startswith('~/'):
|
|
# ~/.ansible -> /home/dmw/.ansible
|
|
return os.path.join(self._connection.homedir, path[2:])
|
|
# ~root/.ansible -> /root/.ansible
|
|
return self._connection.get_chain(use_login=(not sudoable)).call(
|
|
os.path.expanduser,
|
|
mitogen.utils.cast(path),
|
|
)
|
|
|
|
def get_task_timeout_secs(self):
|
|
"""
|
|
Return the task "async:" value, portable across 2.4-2.5.
|
|
"""
|
|
try:
|
|
return self._task.async_val
|
|
except AttributeError:
|
|
return getattr(self._task, 'async')
|
|
|
|
def _set_temp_file_args(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_mitogen.utils.ansible_version[:2] >= (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_mitogen.utils.ansible_version[:2] >= (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):
|
|
"""
|
|
Collect up a module's execution environment then use it to invoke
|
|
target.run_module() or helpers.run_module_async() in the target
|
|
context.
|
|
"""
|
|
if module_name is None:
|
|
module_name = self._task.action
|
|
if module_args is None:
|
|
module_args = self._task.args
|
|
if task_vars is None:
|
|
task_vars = {}
|
|
|
|
self._update_module_args(module_name, module_args, task_vars)
|
|
env = {}
|
|
self._compute_environment_string(env)
|
|
self._set_temp_file_args(module_args, wrap_async)
|
|
|
|
# there's a case where if a task shuts down the node and then immediately calls
|
|
# wait_for_connection, the `ping` test from Ansible won't pass because we lost connection
|
|
# clearing out context forces a reconnect
|
|
# see https://github.com/dw/mitogen/issues/655 and Ansible's `wait_for_connection` module for more info
|
|
if module_name == 'ansible.legacy.ping' and type(self).__name__ == 'wait_for_connection':
|
|
self._connection.context = None
|
|
|
|
self._connection._connect()
|
|
result = ansible_mitogen.planner.invoke(
|
|
ansible_mitogen.planner.Invocation(
|
|
action=self,
|
|
connection=self._connection,
|
|
module_name=mitogen.core.to_text(module_name),
|
|
module_args=mitogen.utils.cast(module_args),
|
|
task_vars=task_vars,
|
|
templar=self._templar,
|
|
env=mitogen.utils.cast(env),
|
|
wrap_async=wrap_async,
|
|
timeout_secs=self.get_task_timeout_secs(),
|
|
)
|
|
)
|
|
|
|
if tmp and delete_remote_tmp and ansible_mitogen.utils.ansible_version[:2] < (2, 5):
|
|
# Built-in actions expected tmpdir to be cleaned up automatically
|
|
# on _execute_module().
|
|
self._remove_tmp_path(tmp)
|
|
|
|
# prevents things like discovered_interpreter_* or ansible_discovered_interpreter_* from being set
|
|
# handle ansible 2.3.3 that has remove_internal_keys in a different place
|
|
check = remove_internal_keys(result)
|
|
if check == 'Not found':
|
|
self._remove_internal_keys(result)
|
|
|
|
# taken from _execute_module of ansible 2.8.6
|
|
# propagate interpreter discovery results back to the controller
|
|
if self._discovered_interpreter_key:
|
|
if result.get('ansible_facts') is None:
|
|
result['ansible_facts'] = {}
|
|
|
|
# only cache discovered_interpreter if we're not running a rediscovery
|
|
# rediscovery happens in places like docker connections that could have different
|
|
# python interpreters than the main host
|
|
if not self._rediscovered_python:
|
|
result['ansible_facts'][self._discovered_interpreter_key] = self._discovered_interpreter
|
|
|
|
if self._discovery_warnings:
|
|
if result.get('warnings') is None:
|
|
result['warnings'] = []
|
|
result['warnings'].extend(self._discovery_warnings)
|
|
|
|
if self._discovery_deprecation_warnings:
|
|
if result.get('deprecations') is None:
|
|
result['deprecations'] = []
|
|
result['deprecations'].extend(self._discovery_deprecation_warnings)
|
|
|
|
return wrap_var(result)
|
|
|
|
def _postprocess_response(self, result):
|
|
"""
|
|
Apply fixups mimicking ActionBase._execute_module(); this is copied
|
|
verbatim from action/__init__.py, the guts of _parse_returned_data are
|
|
garbage and should be removed or reimplemented once tests exist.
|
|
|
|
:param dict result:
|
|
Dictionary with format::
|
|
|
|
{
|
|
"rc": int,
|
|
"stdout": "stdout data",
|
|
"stderr": "stderr data"
|
|
}
|
|
"""
|
|
data = self._parse_returned_data(result)
|
|
|
|
# Cutpasted from the base implementation.
|
|
if 'stdout' in data and 'stdout_lines' not in data:
|
|
data['stdout_lines'] = (data['stdout'] or u'').splitlines()
|
|
if 'stderr' in data and 'stderr_lines' not in data:
|
|
data['stderr_lines'] = (data['stderr'] or u'').splitlines()
|
|
|
|
return data
|
|
|
|
def _low_level_execute_command(self, cmd, sudoable=True, in_data=None,
|
|
executable=None,
|
|
encoding_errors='surrogate_then_replace',
|
|
chdir=None):
|
|
"""
|
|
Override the base implementation by simply calling
|
|
target.exec_command() in the target context.
|
|
"""
|
|
LOG.debug('_low_level_execute_command(%r, in_data=%r, exe=%r, dir=%r)',
|
|
cmd, type(in_data), executable, chdir)
|
|
|
|
if executable is None: # executable defaults to False
|
|
executable = self._play_context.executable
|
|
if executable:
|
|
cmd = executable + ' -c ' + shlex_quote(cmd)
|
|
|
|
# TODO: HACK: if finding python interpreter then we need to keep
|
|
# calling exec_command until we run into the right python we'll use
|
|
# chicken-and-egg issue, mitogen needs a python to run low_level_execute_command
|
|
# which is required by Ansible's discover_interpreter function
|
|
if self._finding_python_interpreter:
|
|
possible_pythons = [
|
|
'/usr/bin/python',
|
|
'python3',
|
|
'python3.7',
|
|
'python3.6',
|
|
'python3.5',
|
|
'python2.7',
|
|
'python2.6',
|
|
'/usr/libexec/platform-python',
|
|
'/usr/bin/python3',
|
|
'python'
|
|
]
|
|
else:
|
|
# not used, just adding a filler value
|
|
possible_pythons = ['python']
|
|
|
|
def _run_cmd():
|
|
return self._connection.exec_command(
|
|
cmd=cmd,
|
|
in_data=in_data,
|
|
sudoable=sudoable,
|
|
mitogen_chdir=chdir,
|
|
)
|
|
|
|
for possible_python in possible_pythons:
|
|
try:
|
|
self._possible_python_interpreter = possible_python
|
|
rc, stdout, stderr = _run_cmd()
|
|
# TODO: what exception is thrown?
|
|
except:
|
|
# we've reached the last python attempted and failed
|
|
# TODO: could use enumerate(), need to check which version of python first had it though
|
|
if possible_python == 'python':
|
|
raise
|
|
else:
|
|
continue
|
|
|
|
stdout_text = to_text(stdout, errors=encoding_errors)
|
|
|
|
return {
|
|
'rc': rc,
|
|
'stdout': stdout_text,
|
|
'stdout_lines': stdout_text.splitlines(),
|
|
'stderr': stderr,
|
|
}
|