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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.compat.six.moves import queue
import json
import multiprocessing
import os
import signal
import sys
import time
import traceback
import zlib
from jinja2.exceptions import TemplateNotFound
# TODO: not needed if we use the cryptography library with its default RNG
# engine
HAS_ATFORK=True
try:
from Crypto.Random import atfork
except ImportError:
HAS_ATFORK=False
from ansible.errors import AnsibleError, AnsibleConnectionFailure
from ansible.executor.task_executor import TaskExecutor
from ansible.executor.task_result import TaskResult
from ansible.playbook.handler import Handler
from ansible.playbook.task import Task
from ansible.vars.unsafe_proxy import AnsibleJSONUnsafeDecoder
from ansible.utils.unicode import to_unicode
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
__all__ = ['WorkerProcess']
class WorkerProcess(multiprocessing.Process):
'''
The worker thread class, which uses TaskExecutor to run tasks
read from a job queue and pushes results into a results queue
for reading later.
'''
def __init__(self, rslt_q, task_vars, host, task, play_context, loader, variable_manager, shared_loader_obj):
super(WorkerProcess, self).__init__()
# takes a task queue manager as the sole param:
self._rslt_q = rslt_q
self._task_vars = task_vars
self._host = host
self._task = task
self._play_context = play_context
self._loader = loader
self._variable_manager = variable_manager
self._shared_loader_obj = shared_loader_obj
# dupe stdin, if we have one
self._new_stdin = sys.stdin
try:
fileno = sys.stdin.fileno()
if fileno is not None:
try:
self._new_stdin = os.fdopen(os.dup(fileno))
except OSError:
# couldn't dupe stdin, most likely because it's
# not a valid file descriptor, so we just rely on
# using the one that was passed in
pass
except ValueError:
# couldn't get stdin's fileno, so we just carry on
pass
def run(self):
'''
Called when the process is started. Pushes the result onto the
results queue. We also remove the host from the blocked hosts list, to
signify that they are ready for their next task.
'''
#import cProfile, pstats, StringIO
#pr = cProfile.Profile()
#pr.enable()
if HAS_ATFORK:
atfork()
try:
# execute the task and build a TaskResult from the result
display.debug("running TaskExecutor() for %s/%s" % (self._host, self._task))
executor_result = TaskExecutor(
self._host,
self._task,
self._task_vars,
self._play_context,
self._new_stdin,
self._loader,
self._shared_loader_obj,
self._rslt_q
).run()
display.debug("done running TaskExecutor() for %s/%s" % (self._host, self._task))
self._host.vars = dict()
self._host.groups = []
task_result = TaskResult(self._host.name, self._task._uuid, executor_result)
# put the result on the result queue
display.debug("sending task result")
self._rslt_q.put(task_result)
display.debug("done sending task result")
except AnsibleConnectionFailure:
self._host.vars = dict()
self._host.groups = []
task_result = TaskResult(self._host.name, self._task._uuid, dict(unreachable=True))
self._rslt_q.put(task_result, block=False)
except Exception as e:
if not isinstance(e, (IOError, EOFError, KeyboardInterrupt, SystemExit)) or isinstance(e, TemplateNotFound):
try:
self._host.vars = dict()
self._host.groups = []
task_result = TaskResult(self._host.name, self._task._uuid, dict(failed=True, exception=to_unicode(traceback.format_exc()), stdout=''))
self._rslt_q.put(task_result, block=False)
except:
display.debug(u"WORKER EXCEPTION: %s" % to_unicode(e))
display.debug(u"WORKER TRACEBACK: %s" % to_unicode(traceback.format_exc()))
display.debug("WORKER PROCESS EXITING")
#pr.disable()
#s = StringIO.StringIO()
#sortby = 'time'
#ps = pstats.Stats(pr, stream=s).sort_stats(sortby)
#ps.print_stats()
#with open('worker_%06d.stats' % os.getpid(), 'w') as f:
# f.write(s.getvalue())
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