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774 lines
28 KiB
Python
774 lines
28 KiB
Python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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################################################
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import fnmatch
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import multiprocessing
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import signal
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import os
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import pwd
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import Queue
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import random
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import traceback
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import tempfile
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import subprocess
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import ansible.constants as C
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import ansible.connection
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from ansible import utils
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from ansible import errors
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from ansible import callbacks as ans_callbacks
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HAS_ATFORK=True
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try:
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from Crypto.Random import atfork
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except ImportError:
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HAS_ATFORK=False
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################################################
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def _executor_hook(job_queue, result_queue):
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''' callback used by multiprocessing pool '''
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# attempt workaround of https://github.com/newsapps/beeswithmachineguns/issues/17
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# does not occur for everyone, some claim still occurs on newer paramiko
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# this function not present in CentOS 6
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if HAS_ATFORK:
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atfork()
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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while not job_queue.empty():
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try:
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job = job_queue.get(block=False)
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runner, host = job
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result_queue.put(runner._executor(host))
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except Queue.Empty:
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pass
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except:
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traceback.print_exc()
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################################################
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class Runner(object):
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_external_variable_script = None
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def __init__(self, host_list=C.DEFAULT_HOST_LIST, module_path=C.DEFAULT_MODULE_PATH,
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module_name=C.DEFAULT_MODULE_NAME, module_args=C.DEFAULT_MODULE_ARGS,
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forks=C.DEFAULT_FORKS, timeout=C.DEFAULT_TIMEOUT, pattern=C.DEFAULT_PATTERN,
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remote_user=C.DEFAULT_REMOTE_USER, remote_pass=C.DEFAULT_REMOTE_PASS,
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sudo_pass=C.DEFAULT_SUDO_PASS, remote_port=C.DEFAULT_REMOTE_PORT, background=0,
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basedir=None, setup_cache=None, transport=C.DEFAULT_TRANSPORT,
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conditional='True', groups={}, callbacks=None, verbose=False,
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debug=False, sudo=False, extra_vars=None, module_vars=None):
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if setup_cache is None:
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setup_cache = {}
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if basedir is None:
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basedir = os.getcwd()
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if callbacks is None:
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callbacks = ans_callbacks.DefaultRunnerCallbacks()
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self.callbacks = callbacks
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self.generated_jid = str(random.randint(0, 999999999999))
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self.transport = transport
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self.connector = ansible.connection.Connection(self, self.transport)
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if type(host_list) == str:
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self.host_list, self.groups = self.parse_hosts(host_list)
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else:
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self.host_list = host_list
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self.groups = groups
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self.setup_cache = setup_cache
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self.conditional = conditional
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self.module_path = module_path
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self.module_name = module_name
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self.forks = int(forks)
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self.pattern = pattern
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self.module_args = module_args
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self.module_vars = module_vars
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self.extra_vars = extra_vars
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self.timeout = timeout
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self.debug = debug
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self.verbose = verbose
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self.remote_user = remote_user
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self.remote_pass = remote_pass
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self.remote_port = remote_port
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self.background = background
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self.basedir = basedir
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self.sudo = sudo
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self.sudo_pass = sudo_pass
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euid = pwd.getpwuid(os.geteuid())[0]
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if self.transport == 'local' and self.remote_user != euid:
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raise Exception("User mismatch: expected %s, but is %s" % (self.remote_user, euid))
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if type(self.module_args) not in [str, unicode, dict]:
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raise Exception("module_args must be a string or dict: %s" % self.module_args)
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self._tmp_paths = {}
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random.seed()
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# *****************************************************
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@classmethod
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def parse_hosts_from_regular_file(cls, host_list):
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''' parse a textual host file '''
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results = []
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groups = dict(ungrouped=[])
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lines = file(host_list).read().split("\n")
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group_name = 'ungrouped'
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for item in lines:
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item = item.lstrip().rstrip()
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if item.startswith("#"):
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# ignore commented out lines
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pass
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elif item.startswith("["):
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# looks like a group
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group_name = item.replace("[","").replace("]","").lstrip().rstrip()
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groups[group_name] = []
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elif item != "":
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# looks like a regular host
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groups[group_name].append(item)
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if not item in results:
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results.append(item)
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return (results, groups)
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# *****************************************************
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@classmethod
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def parse_hosts_from_script(cls, host_list, extra_vars):
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''' evaluate a script that returns list of hosts by groups '''
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results = []
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groups = dict(ungrouped=[])
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host_list = os.path.abspath(host_list)
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cls._external_variable_script = host_list
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cmd = [host_list, '--list']
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if extra_vars:
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cmd.extend(['--extra-vars', extra_vars])
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cmd = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=False)
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out, err = cmd.communicate()
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rc = cmd.returncode
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if rc:
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raise errors.AnsibleError("%s: %s" % (host_list, err))
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try:
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groups = utils.json_loads(out)
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except:
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raise errors.AnsibleError("invalid JSON response from script: %s" % host_list)
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for (groupname, hostlist) in groups.iteritems():
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for host in hostlist:
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if host not in results:
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results.append(host)
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return (results, groups)
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# *****************************************************
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@classmethod
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def parse_hosts(cls, host_list, override_hosts=None, extra_vars=None):
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''' parse the host inventory file, returns (hosts, groups) '''
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if override_hosts is not None:
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if type(override_hosts) != list:
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raise errors.AnsibleError("override hosts must be a list")
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return (override_hosts, dict(ungrouped=override_hosts))
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if type(host_list) == list:
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raise Exception("function can only be called on inventory files")
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host_list = os.path.expanduser(host_list)
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if not os.path.exists(host_list):
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raise errors.AnsibleFileNotFound("inventory file not found: %s" % host_list)
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if not os.access(host_list, os.X_OK):
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return Runner.parse_hosts_from_regular_file(host_list)
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else:
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return Runner.parse_hosts_from_script(host_list, extra_vars)
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# *****************************************************
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def _matches(self, host_name, pattern):
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''' returns if a hostname is matched by the pattern '''
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# a pattern is in fnmatch format but more than one pattern
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# can be strung together with semicolons. ex:
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# atlanta-web*.example.com;dc-web*.example.com
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if host_name == '':
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return False
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pattern = pattern.replace(";",":")
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subpatterns = pattern.split(":")
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for subpattern in subpatterns:
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if subpattern == 'all':
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return True
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if fnmatch.fnmatch(host_name, subpattern):
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return True
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elif subpattern in self.groups:
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if host_name in self.groups[subpattern]:
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return True
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return False
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# *****************************************************
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def _connect(self, host):
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''' connects to a host, returns (is_successful, connection_object OR traceback_string) '''
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try:
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return [ True, self.connector.connect(host) ]
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except errors.AnsibleConnectionFailed, e:
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return [ False, "FAILED: %s" % str(e) ]
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# *****************************************************
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def _return_from_module(self, conn, host, result, err, executed=None):
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''' helper function to handle JSON parsing of results '''
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try:
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result = utils.parse_json(result)
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if executed is not None:
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result['invocation'] = executed
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if 'stderr' in result:
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err="%s%s"%(err,result['stderr'])
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return [host, True, result, err]
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except Exception, e:
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return [host, False, "%s/%s/%s" % (str(e), result, executed), err]
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# *****************************************************
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def _delete_remote_files(self, conn, files):
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''' deletes one or more remote files '''
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if type(files) == str:
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files = [ files ]
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for filename in files:
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if not filename.startswith('/tmp/'):
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raise Exception("not going to happen")
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self._exec_command(conn, "rm -rf %s" % filename, None)
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# *****************************************************
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def _transfer_module(self, conn, tmp, module):
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''' transfers a module file to the remote side to execute it, but does not execute it yet '''
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outpath = self._copy_module(conn, tmp, module)
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self._exec_command(conn, "chmod +x %s" % outpath, tmp)
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return outpath
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# *****************************************************
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def _transfer_str(self, conn, tmp, name, args_str):
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''' transfer arguments as a single file to be fed to the module. '''
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if type(args_str) == dict:
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args_str = utils.smjson(args_str)
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args_fd, args_file = tempfile.mkstemp()
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args_fo = os.fdopen(args_fd, 'w')
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args_fo.write(args_str)
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args_fo.flush()
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args_fo.close()
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args_remote = os.path.join(tmp, name)
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conn.put_file(args_file, args_remote)
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os.unlink(args_file)
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return args_remote
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# *****************************************************
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def _add_variables_from_script(self, conn, inject):
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''' support per system variabes from external variable scripts, see web docs '''
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host = conn.host
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cmd = [Runner._external_variable_script, '--host', host]
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if self.extra_vars:
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cmd.extend(['--extra-vars', self.extra_vars])
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cmd = subprocess.Popen(cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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shell=False
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)
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out, err = cmd.communicate()
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inject2 = {}
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try:
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inject2 = utils.json_loads(out)
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except:
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raise errors.AnsibleError("%s returned invalid result when called with hostname %s" % (
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Runner._external_variable_script,
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host
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))
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# store injected variables in the templates
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inject.update(inject2)
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# *****************************************************
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def _add_setup_vars(self, inject, args):
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''' setup module variables need special handling '''
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is_dict = False
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if type(args) == dict:
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is_dict = True
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# TODO: keep this as a dict through the whole path to simplify this code
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for (k,v) in inject.iteritems():
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if not k.startswith('facter_') and not k.startswith('ohai_'):
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if not is_dict:
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if str(v).find(" ") != -1:
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v = "\"%s\"" % v
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args += " %s=%s" % (k, str(v).replace(" ","~~~"))
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else:
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args[k]=v
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return args
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# *****************************************************
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def _add_setup_metadata(self, args):
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''' automatically determine where to store variables for the setup module '''
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is_dict = False
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if type(args) == dict:
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is_dict = True
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# TODO: keep this as a dict through the whole path to simplify this code
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if not is_dict:
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if args.find("metadata=") == -1:
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if self.remote_user == 'root':
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args = "%s metadata=/etc/ansible/setup" % args
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else:
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args = "%s metadata=/home/%s/.ansible/setup" % (args, self.remote_user)
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else:
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if not 'metadata' in args:
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if self.remote_user == 'root':
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args['metadata'] = '/etc/ansible/setup'
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else:
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args['metadata'] = "/home/%s/.ansible/setup" % (self.remote_user)
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return args
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# *****************************************************
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def _execute_module(self, conn, tmp, remote_module_path, args,
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async_jid=None, async_module=None, async_limit=None):
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''' runs a module that has already been transferred '''
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inject = self.setup_cache.get(conn.host,{})
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conditional = utils.double_template(self.conditional, inject)
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if not eval(conditional):
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return [ utils.smjson(dict(skipped=True)), None, 'skipped' ]
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if Runner._external_variable_script is not None:
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self._add_variables_from_script(conn, inject)
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if self.module_name == 'setup':
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args = self._add_setup_vars(inject, args)
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args = self._add_setup_metadata(args)
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if type(args) == dict:
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args = utils.bigjson(args)
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args = utils.template(args, inject)
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module_name_tail = remote_module_path.split("/")[-1]
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argsfile = self._transfer_str(conn, tmp, 'arguments', args)
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if async_jid is None:
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cmd = "%s %s" % (remote_module_path, argsfile)
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else:
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cmd = " ".join([str(x) for x in [remote_module_path, async_jid, async_limit, async_module, argsfile]])
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res, err = self._exec_command(conn, cmd, tmp, sudoable=True)
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client_executed_str = "%s %s" % (module_name_tail, args.strip())
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return ( res, err, client_executed_str )
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# *****************************************************
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def _add_result_to_setup_cache(self, conn, result):
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''' allows discovered variables to be used in templates and action statements '''
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host = conn.host
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try:
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var_result = utils.parse_json(result)
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except:
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var_result = {}
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# note: do not allow variables from playbook to be stomped on
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# by variables coming up from facter/ohai/etc. They
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# should be prefixed anyway
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if not host in self.setup_cache:
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self.setup_cache[host] = {}
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for (k, v) in var_result.iteritems():
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if not k in self.setup_cache[host]:
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self.setup_cache[host][k] = v
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# *****************************************************
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def _execute_normal_module(self, conn, host, tmp, module_name):
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''' transfer & execute a module that is not 'copy' or 'template' '''
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# shell and command are the same module
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if module_name == 'shell':
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module_name = 'command'
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self.module_args += " #USE_SHELL"
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module = self._transfer_module(conn, tmp, module_name)
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(result, err, executed) = self._execute_module(conn, tmp, module, self.module_args)
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if module_name == 'setup':
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self._add_result_to_setup_cache(conn, result)
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return self._return_from_module(conn, host, result, err, executed)
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# *****************************************************
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def _execute_async_module(self, conn, host, tmp, module_name):
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''' transfer the given module name, plus the async module, then run it '''
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# hack to make the 'shell' module keyword really be executed
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# by the command module
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module_args = self.module_args
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if module_name == 'shell':
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module_name = 'command'
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module_args += " #USE_SHELL"
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async = self._transfer_module(conn, tmp, 'async_wrapper')
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module = self._transfer_module(conn, tmp, module_name)
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(result, err, executed) = self._execute_module(conn, tmp, async, module_args,
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async_module=module,
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async_jid=self.generated_jid,
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async_limit=self.background
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)
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return self._return_from_module(conn, host, result, err, executed)
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# *****************************************************
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def _execute_copy(self, conn, host, tmp):
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''' handler for file transfer operations '''
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# load up options
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options = utils.parse_kv(self.module_args)
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source = options.get('src', None)
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dest = options.get('dest', None)
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if source is None or dest is None:
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return (host, True, dict(failed=True, msg="src and dest are required"), '')
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# transfer the file to a remote tmp location
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tmp_src = tmp + source.split('/')[-1]
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conn.put_file(utils.path_dwim(self.basedir, source), tmp_src)
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# install the copy module
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self.module_name = 'copy'
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module = self._transfer_module(conn, tmp, 'copy')
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# run the copy module
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args = "src=%s dest=%s" % (tmp_src, dest)
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(result1, err, executed) = self._execute_module(conn, tmp, module, args)
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(host, ok, data, err) = self._return_from_module(conn, host, result1, err, executed)
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if ok:
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return self._chain_file_module(conn, tmp, data, err, options, executed)
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else:
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return (host, ok, data, err)
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# *****************************************************
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def _execute_fetch(self, conn, host, tmp):
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''' handler for fetch operations '''
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# load up options
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options = utils.parse_kv(self.module_args)
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source = options.get('src', None)
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dest = options.get('dest', None)
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if source is None or dest is None:
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return (host, True, dict(failed=True, msg="src and dest are required"), '')
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# files are saved in dest dir, with a subdir for each host, then the filename
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filename = os.path.basename(source)
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dest = "%s/%s/%s" % (utils.path_dwim(self.basedir, dest), host, filename)
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# compare old and new md5 for support of change hooks
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local_md5 = None
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if os.path.exists(dest):
|
|
local_md5 = os.popen("md5sum %s" % dest).read().split()[0]
|
|
remote_md5 = self._exec_command(conn, "md5sum %s" % source, tmp, True)[0].split()[0]
|
|
|
|
if remote_md5 != local_md5:
|
|
# create the containing directories, if needed
|
|
os.makedirs(os.path.dirname(dest))
|
|
# fetch the file and check for changes
|
|
conn.fetch_file(source, dest)
|
|
new_md5 = os.popen("md5sum %s" % dest).read().split()[0]
|
|
changed = (new_md5 != local_md5)
|
|
if new_md5 != remote_md5:
|
|
return (host, True, dict(failed=True, msg="md5 mismatch", md5sum=new_md5), '')
|
|
return (host, True, dict(changed=True, md5sum=new_md5), '')
|
|
else:
|
|
return (host, True, dict(changed=False, md5sum=local_md5), '')
|
|
|
|
|
|
# *****************************************************
|
|
|
|
def _chain_file_module(self, conn, tmp, data, err, options, executed):
|
|
''' handles changing file attribs after copy/template operations '''
|
|
|
|
old_changed = data.get('changed', False)
|
|
module = self._transfer_module(conn, tmp, 'file')
|
|
args = ' '.join([ "%s=%s" % (k,v) for (k,v) in options.items() ])
|
|
(result2, err2, executed2) = self._execute_module(conn, tmp, module, args)
|
|
results2 = self._return_from_module(conn, conn.host, result2, err2, executed)
|
|
(host, ok, data2, err2) = results2
|
|
new_changed = data2.get('changed', False)
|
|
data.update(data2)
|
|
if old_changed or new_changed:
|
|
data['changed'] = True
|
|
return (host, ok, data, "%s%s"%(err,err2))
|
|
|
|
# *****************************************************
|
|
|
|
def _execute_template(self, conn, host, tmp):
|
|
''' handler for template operations '''
|
|
|
|
# load up options
|
|
options = utils.parse_kv(self.module_args)
|
|
source = options.get('src', None)
|
|
dest = options.get('dest', None)
|
|
metadata = options.get('metadata', None)
|
|
if source is None or dest is None:
|
|
return (host, True, dict(failed=True, msg="src and dest are required"), '')
|
|
|
|
if metadata is None:
|
|
if self.remote_user == 'root':
|
|
metadata = '/etc/ansible/setup'
|
|
else:
|
|
metadata = '~/.ansible/setup'
|
|
|
|
# first copy the source template over
|
|
temppath = tmp + os.path.split(source)[-1]
|
|
conn.put_file(utils.path_dwim(self.basedir, source), temppath)
|
|
|
|
# install the template module
|
|
template_module = self._transfer_module(conn, tmp, 'template')
|
|
|
|
# transfer module vars
|
|
if self.module_vars:
|
|
vars = utils.bigjson(self.module_vars)
|
|
vars_path = self._transfer_str(conn, tmp, 'module_vars', vars)
|
|
vars_arg=" vars=%s"%(vars_path)
|
|
else:
|
|
vars_arg=""
|
|
|
|
# run the template module
|
|
args = "src=%s dest=%s metadata=%s%s" % (temppath, dest, metadata, vars_arg)
|
|
(result1, err, executed) = self._execute_module(conn, tmp, template_module, args)
|
|
(host, ok, data, err) = self._return_from_module(conn, host, result1, err, executed)
|
|
|
|
if ok:
|
|
return self._chain_file_module(conn, tmp, data, err, options, executed)
|
|
else:
|
|
return (host, ok, data, err)
|
|
|
|
# *****************************************************
|
|
|
|
def _executor(self, host):
|
|
try:
|
|
(host, ok, data, err) = self._executor_internal(host)
|
|
if not ok:
|
|
self.callbacks.on_unreachable(host, data)
|
|
return (host, ok, data)
|
|
except errors.AnsibleError, ae:
|
|
msg = str(ae)
|
|
self.callbacks.on_unreachable(host, msg)
|
|
return [host, False, msg]
|
|
except Exception:
|
|
msg = traceback.format_exc()
|
|
self.callbacks.on_unreachable(host, msg)
|
|
return [host, False, msg]
|
|
|
|
def _executor_internal(self, host):
|
|
''' callback executed in parallel for each host. returns (hostname, connected_ok, extra) '''
|
|
|
|
ok, conn = self._connect(host)
|
|
if not ok:
|
|
return [ host, False, conn , None]
|
|
|
|
cache = self.setup_cache.get(host, {})
|
|
module_name = utils.template(self.module_name, cache)
|
|
|
|
tmp = self._get_tmp_path(conn)
|
|
result = None
|
|
|
|
if self.module_name == 'copy':
|
|
result = self._execute_copy(conn, host, tmp)
|
|
elif self.module_name == 'fetch':
|
|
result = self._execute_fetch(conn, host, tmp)
|
|
elif self.module_name == 'template':
|
|
result = self._execute_template(conn, host, tmp)
|
|
else:
|
|
if self.background == 0:
|
|
result = self._execute_normal_module(conn, host, tmp, module_name)
|
|
else:
|
|
result = self._execute_async_module(conn, host, tmp, module_name)
|
|
|
|
self._delete_remote_files(conn, tmp)
|
|
conn.close()
|
|
|
|
(host, connect_ok, data, err) = result
|
|
if not connect_ok:
|
|
self.callbacks.on_unreachable(host, data)
|
|
else:
|
|
if 'failed' in data or 'rc' in data and str(data['rc']) != '0':
|
|
self.callbacks.on_failed(host, data)
|
|
elif 'skipped' in data:
|
|
self.callbacks.on_skipped(host)
|
|
else:
|
|
self.callbacks.on_ok(host, data)
|
|
|
|
if err:
|
|
if self.debug or data.get('parsed', True) == False:
|
|
self.callbacks.on_error(host, err)
|
|
|
|
return result
|
|
|
|
# *****************************************************
|
|
|
|
def _exec_command(self, conn, cmd, tmp, sudoable=False):
|
|
''' execute a command string over SSH, return the output '''
|
|
|
|
stdin, stdout, stderr = conn.exec_command(cmd, tmp, sudoable=sudoable)
|
|
|
|
if type(stderr) != str:
|
|
err="\n".join(stderr.readlines())
|
|
else:
|
|
err=stderr
|
|
|
|
if type(stdout) != str:
|
|
return "\n".join(stdout.readlines()), err
|
|
else:
|
|
return stdout, err
|
|
|
|
# *****************************************************
|
|
|
|
def _get_tmp_path(self, conn):
|
|
''' gets a temporary path on a remote box '''
|
|
|
|
result, err = self._exec_command(conn, "mktemp -d /tmp/ansible.XXXXXX", None, sudoable=False)
|
|
cleaned = result.split("\n")[0].strip() + '/'
|
|
return cleaned
|
|
|
|
|
|
# *****************************************************
|
|
|
|
def _copy_module(self, conn, tmp, module):
|
|
''' transfer a module over SFTP, does not run it '''
|
|
|
|
if module.startswith("/"):
|
|
raise errors.AnsibleFileNotFound("%s is not a module" % module)
|
|
in_path = os.path.expanduser(os.path.join(self.module_path, module))
|
|
if not os.path.exists(in_path):
|
|
raise errors.AnsibleFileNotFound("module not found: %s" % in_path)
|
|
|
|
out_path = tmp + module
|
|
conn.put_file(in_path, out_path)
|
|
return out_path
|
|
|
|
# *****************************************************
|
|
|
|
def _match_hosts(self, pattern):
|
|
''' return all matched hosts fitting a pattern '''
|
|
|
|
return [ h for h in self.host_list if self._matches(h, pattern) ]
|
|
|
|
# *****************************************************
|
|
|
|
def _parallel_exec(self, hosts):
|
|
''' handles mulitprocessing when more than 1 fork is required '''
|
|
|
|
job_queue = multiprocessing.Manager().Queue()
|
|
[job_queue.put(i) for i in hosts]
|
|
|
|
result_queue = multiprocessing.Manager().Queue()
|
|
|
|
workers = []
|
|
for i in range(self.forks):
|
|
prc = multiprocessing.Process(target=_executor_hook,
|
|
args=(job_queue, result_queue))
|
|
prc.start()
|
|
workers.append(prc)
|
|
|
|
try:
|
|
for worker in workers:
|
|
worker.join()
|
|
except KeyboardInterrupt:
|
|
for worker in workers:
|
|
worker.terminate()
|
|
worker.join()
|
|
|
|
results = []
|
|
while not result_queue.empty():
|
|
results.append(result_queue.get(block=False))
|
|
return results
|
|
|
|
# *****************************************************
|
|
|
|
def _partition_results(self, results):
|
|
''' seperate results by ones we contacted & ones we didn't '''
|
|
|
|
results2 = dict(contacted={}, dark={})
|
|
|
|
if results is None:
|
|
return None
|
|
|
|
for result in results:
|
|
(host, contacted_ok, result) = result
|
|
if contacted_ok:
|
|
results2["contacted"][host] = result
|
|
else:
|
|
results2["dark"][host] = result
|
|
|
|
# hosts which were contacted but never got a chance to return
|
|
for host in self._match_hosts(self.pattern):
|
|
if not (host in results2['dark'] or host in results2['contacted']):
|
|
results2["dark"][host] = {}
|
|
|
|
return results2
|
|
|
|
# *****************************************************
|
|
|
|
def run(self):
|
|
''' xfer & run module on all matched hosts '''
|
|
|
|
# find hosts that match the pattern
|
|
hosts = self._match_hosts(self.pattern)
|
|
if len(hosts) == 0:
|
|
self.callbacks.on_no_hosts()
|
|
return dict(contacted={}, dark={})
|
|
|
|
hosts = [ (self,x) for x in hosts ]
|
|
results = None
|
|
if self.forks > 1:
|
|
results = self._parallel_exec(hosts)
|
|
else:
|
|
results = [ self._executor(h[1]) for h in hosts ]
|
|
return self._partition_results(results)
|
|
|
|
|