mirror of
https://github.com/ansible-collections/community.general.git
synced 2024-09-14 20:13:21 +02:00
Move queuing tasks to a background thread
This commit is contained in:
parent
9ecec6c28e
commit
b71957d6e6
8 changed files with 226 additions and 156 deletions
43
lib/ansible/executor/action_write_locks.py
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43
lib/ansible/executor/action_write_locks.py
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@ -0,0 +1,43 @@
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# (c) 2016 - Red Hat, Inc. <support@ansible.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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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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from multiprocessing import Lock
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from ansible.module_utils.facts import Facts
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if 'action_write_locks' not in globals():
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# Do not initialize this more than once because it seems to bash
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# the existing one. multiprocessing must be reloading the module
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# when it forks?
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action_write_locks = dict()
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# Below is a Lock for use when we weren't expecting a named module.
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# It gets used when an action plugin directly invokes a module instead
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# of going through the strategies. Slightly less efficient as all
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# processes with unexpected module names will wait on this lock
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action_write_locks[None] = Lock()
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# These plugins are called directly by action plugins (not going through
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# a strategy). We precreate them here as an optimization
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mods = set(p['name'] for p in Facts.PKG_MGRS)
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mods.update(('copy', 'file', 'setup', 'slurp', 'stat'))
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for mod_name in mods:
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action_write_locks[mod_name] = Lock()
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@ -37,7 +37,7 @@ from ansible.utils.unicode import to_bytes, to_unicode
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# Must import strategy and use write_locks from there
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# If we import write_locks directly then we end up binding a
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# variable to the object and then it never gets updated.
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from ansible.plugins import strategy
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from ansible.executor import action_write_locks
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try:
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from __main__ import display
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@ -596,16 +596,16 @@ def _find_snippet_imports(module_name, module_data, module_path, module_args, ta
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display.debug('ANSIBALLZ: using cached module: %s' % cached_module_filename)
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zipdata = open(cached_module_filename, 'rb').read()
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else:
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if module_name in strategy.action_write_locks:
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if module_name in action_write_locks.action_write_locks:
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display.debug('ANSIBALLZ: Using lock for %s' % module_name)
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lock = strategy.action_write_locks[module_name]
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lock = action_write_locks.action_write_locks[module_name]
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else:
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# If the action plugin directly invokes the module (instead of
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# going through a strategy) then we don't have a cross-process
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# Lock specifically for this module. Use the "unexpected
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# module" lock instead
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display.debug('ANSIBALLZ: Using generic lock for %s' % module_name)
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lock = strategy.action_write_locks[None]
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lock = action_write_locks.action_write_locks[None]
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display.debug('ANSIBALLZ: Acquiring lock')
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with lock:
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@ -64,12 +64,12 @@ class WorkerProcess(multiprocessing.Process):
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for reading later.
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'''
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def __init__(self, rslt_q, task_vars, host, task, play_context, loader, variable_manager, shared_loader_obj):
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def __init__(self, rslt_q, play, host, task, task_vars, play_context, loader, variable_manager, shared_loader_obj):
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super(WorkerProcess, self).__init__()
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# takes a task queue manager as the sole param:
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self._rslt_q = rslt_q
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self._task_vars = task_vars
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self._play = play
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self._host = host
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self._task = task
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self._play_context = play_context
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@ -77,6 +77,8 @@ class WorkerProcess(multiprocessing.Process):
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self._variable_manager = variable_manager
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self._shared_loader_obj = shared_loader_obj
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self._task_vars = task_vars
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# dupe stdin, if we have one
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self._new_stdin = sys.stdin
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try:
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@ -158,3 +160,4 @@ class WorkerProcess(multiprocessing.Process):
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#with open('worker_%06d.stats' % os.getpid(), 'w') as f:
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# f.write(s.getvalue())
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sys.exit(0)
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@ -22,14 +22,21 @@ __metaclass__ = type
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import multiprocessing
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import os
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import tempfile
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import threading
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import time
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from collections import deque
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from ansible import constants as C
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from ansible.errors import AnsibleError
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from ansible.executor import action_write_locks
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from ansible.executor.play_iterator import PlayIterator
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from ansible.executor.process.worker import WorkerProcess
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from ansible.executor.stats import AggregateStats
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from ansible.module_utils.facts import Facts
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from ansible.playbook.block import Block
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from ansible.playbook.play_context import PlayContext
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from ansible.plugins import callback_loader, strategy_loader, module_loader
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from ansible.plugins import action_loader, callback_loader, connection_loader, filter_loader, lookup_loader, module_loader, strategy_loader, test_loader
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from ansible.template import Templar
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from ansible.vars.hostvars import HostVars
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from ansible.plugins.callback import CallbackBase
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@ -46,6 +53,23 @@ except ImportError:
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__all__ = ['TaskQueueManager']
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# TODO: this should probably be in the plugins/__init__.py, with
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# a smarter mechanism to set all of the attributes based on
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# the loaders created there
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class SharedPluginLoaderObj:
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'''
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A simple object to make pass the various plugin loaders to
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the forked processes over the queue easier
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'''
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def __init__(self):
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self.action_loader = action_loader
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self.connection_loader = connection_loader
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self.filter_loader = filter_loader
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self.test_loader = test_loader
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self.lookup_loader = lookup_loader
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self.module_loader = module_loader
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class TaskQueueManager:
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'''
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@ -77,6 +101,8 @@ class TaskQueueManager:
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self._run_additional_callbacks = run_additional_callbacks
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self._run_tree = run_tree
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self._iterator = None
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self._callbacks_loaded = False
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self._callback_plugins = []
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self._start_at_done = False
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@ -98,12 +124,86 @@ class TaskQueueManager:
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self._failed_hosts = dict()
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self._unreachable_hosts = dict()
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# the "queue" for the background thread to use
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self._queued_tasks = deque()
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self._queued_tasks_lock = threading.Lock()
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# the background queuing thread
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self._queue_thread = None
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self._workers = []
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self._final_q = multiprocessing.Queue()
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# A temporary file (opened pre-fork) used by connection
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# plugins for inter-process locking.
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self._connection_lockfile = tempfile.TemporaryFile()
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def _queue_thread_main(self):
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# create a dummy object with plugin loaders set as an easier
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# way to share them with the forked processes
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shared_loader_obj = SharedPluginLoaderObj()
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display.debug("queuing thread starting")
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while not self._terminated:
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available_workers = []
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for idx, entry in enumerate(self._workers):
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(worker_prc, _) = entry
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if worker_prc is None or not worker_prc.is_alive():
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available_workers.append(idx)
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if len(available_workers) == 0:
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time.sleep(0.01)
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continue
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for worker_idx in available_workers:
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try:
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self._queued_tasks_lock.acquire()
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(host, task, task_vars, play_context) = self._queued_tasks.pop()
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except IndexError:
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break
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finally:
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self._queued_tasks_lock.release()
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if task.action not in action_write_locks.action_write_locks:
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display.debug('Creating lock for %s' % task.action)
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action_write_locks.action_write_locks[task.action] = multiprocessing.Lock()
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try:
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worker_prc = WorkerProcess(
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self._final_q,
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self._iterator._play,
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host,
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task,
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task_vars,
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play_context,
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self._loader,
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self._variable_manager,
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shared_loader_obj,
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)
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self._workers[worker_idx][0] = worker_prc
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worker_prc.start()
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display.debug("worker is %d (out of %d available)" % (worker_idx+1, len(self._workers)))
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except (EOFError, IOError, AssertionError) as e:
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# most likely an abort
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display.debug("got an error while queuing: %s" % e)
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break
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display.debug("queuing thread exiting")
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def queue_task(self, host, task, task_vars, play_context):
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self._queued_tasks_lock.acquire()
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self._queued_tasks.append((host, task, task_vars, play_context))
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self._queued_tasks_lock.release()
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def queue_multiple_tasks(self, items, play_context):
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for item in items:
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(host, task, task_vars) = item
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self._queued_tasks_lock.acquire()
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self._queued_tasks.append((host, task, task_vars, play_context))
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self._queued_tasks_lock.release()
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def _initialize_processes(self, num):
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self._workers = []
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@ -207,6 +307,10 @@ class TaskQueueManager:
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if not self._callbacks_loaded:
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self.load_callbacks()
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if self._queue_thread is None:
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self._queue_thread = threading.Thread(target=self._queue_thread_main)
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self._queue_thread.start()
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all_vars = self._variable_manager.get_vars(loader=self._loader, play=play)
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templar = Templar(loader=self._loader, variables=all_vars)
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@ -252,7 +356,7 @@ class TaskQueueManager:
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raise AnsibleError("Invalid play strategy specified: %s" % new_play.strategy, obj=play._ds)
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# build the iterator
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iterator = PlayIterator(
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self._iterator = PlayIterator(
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inventory=self._inventory,
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play=new_play,
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play_context=play_context,
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# hosts so we know what failed this round.
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for host_name in self._failed_hosts.keys():
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host = self._inventory.get_host(host_name)
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iterator.mark_host_failed(host)
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self._iterator.mark_host_failed(host)
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self.clear_failed_hosts()
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@ -278,10 +382,10 @@ class TaskQueueManager:
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self._start_at_done = True
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# and run the play using the strategy and cleanup on way out
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play_return = strategy.run(iterator, play_context)
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play_return = strategy.run(self._iterator, play_context)
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# now re-save the hosts that failed from the iterator to our internal list
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for host_name in iterator.get_failed_hosts():
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for host_name in self._iterator.get_failed_hosts():
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self._failed_hosts[host_name] = True
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self._cleanup_processes()
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@ -294,14 +398,13 @@ class TaskQueueManager:
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self._cleanup_processes()
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def _cleanup_processes(self):
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if hasattr(self, '_workers'):
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for (worker_prc, rslt_q) in self._workers:
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rslt_q.close()
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if worker_prc and worker_prc.is_alive():
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try:
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worker_prc.terminate()
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except AttributeError:
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pass
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for (worker_prc, rslt_q) in self._workers:
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rslt_q.close()
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if worker_prc and worker_prc.is_alive():
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try:
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worker_prc.terminate()
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except AttributeError:
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pass
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def clear_failed_hosts(self):
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self._failed_hosts = dict()
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@ -23,7 +23,6 @@ import json
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import time
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import zlib
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from collections import defaultdict
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from multiprocessing import Lock
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from jinja2.exceptions import UndefinedError
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@ -32,11 +31,9 @@ from ansible.compat.six import iteritems, text_type, string_types
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from ansible import constants as C
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from ansible.errors import AnsibleError, AnsibleParserError, AnsibleUndefinedVariable
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from ansible.executor.play_iterator import PlayIterator
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from ansible.executor.process.worker import WorkerProcess
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from ansible.executor.task_result import TaskResult
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from ansible.inventory.host import Host
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from ansible.inventory.group import Group
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from ansible.module_utils.facts import Facts
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from ansible.playbook.helpers import load_list_of_blocks
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from ansible.playbook.included_file import IncludedFile
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from ansible.playbook.task_include import TaskInclude
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@ -56,41 +53,6 @@ except ImportError:
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__all__ = ['StrategyBase']
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if 'action_write_locks' not in globals():
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# Do not initialize this more than once because it seems to bash
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# the existing one. multiprocessing must be reloading the module
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# when it forks?
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action_write_locks = dict()
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# Below is a Lock for use when we weren't expecting a named module.
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# It gets used when an action plugin directly invokes a module instead
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# of going through the strategies. Slightly less efficient as all
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# processes with unexpected module names will wait on this lock
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action_write_locks[None] = Lock()
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# These plugins are called directly by action plugins (not going through
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# a strategy). We precreate them here as an optimization
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mods = set(p['name'] for p in Facts.PKG_MGRS)
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mods.update(('copy', 'file', 'setup', 'slurp', 'stat'))
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for mod_name in mods:
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action_write_locks[mod_name] = Lock()
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# TODO: this should probably be in the plugins/__init__.py, with
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# a smarter mechanism to set all of the attributes based on
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# the loaders created there
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class SharedPluginLoaderObj:
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'''
|
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A simple object to make pass the various plugin loaders to
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the forked processes over the queue easier
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'''
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def __init__(self):
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self.action_loader = action_loader
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self.connection_loader = connection_loader
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self.filter_loader = filter_loader
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self.test_loader = test_loader
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self.lookup_loader = lookup_loader
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self.module_loader = module_loader
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class StrategyBase:
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@ -102,7 +64,6 @@ class StrategyBase:
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def __init__(self, tqm):
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self._tqm = tqm
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self._inventory = tqm.get_inventory()
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self._workers = tqm.get_workers()
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self._notified_handlers = tqm._notified_handlers
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self._listening_handlers = tqm._listening_handlers
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self._variable_manager = tqm.get_variable_manager()
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@ -115,7 +76,6 @@ class StrategyBase:
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# internal counters
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self._pending_results = 0
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self._cur_worker = 0
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# this dictionary is used to keep track of hosts that have
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# outstanding tasks still in queue
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@ -166,58 +126,10 @@ class StrategyBase:
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def _queue_task(self, host, task, task_vars, play_context):
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''' handles queueing the task up to be sent to a worker '''
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self._tqm.queue_task(host, task, task_vars, play_context)
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self._pending_results += 1
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display.debug("entering _queue_task() for %s/%s" % (host.name, task.action))
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# Add a write lock for tasks.
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||||
# Maybe this should be added somewhere further up the call stack but
|
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# this is the earliest in the code where we have task (1) extracted
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||||
# into its own variable and (2) there's only a single code path
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||||
# leading to the module being run. This is called by three
|
||||
# functions: __init__.py::_do_handler_run(), linear.py::run(), and
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||||
# free.py::run() so we'd have to add to all three to do it there.
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# The next common higher level is __init__.py::run() and that has
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# tasks inside of play_iterator so we'd have to extract them to do it
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# there.
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global action_write_locks
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if task.action not in action_write_locks:
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||||
display.debug('Creating lock for %s' % task.action)
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action_write_locks[task.action] = Lock()
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||||
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||||
# and then queue the new task
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||||
try:
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||||
# create a dummy object with plugin loaders set as an easier
|
||||
# way to share them with the forked processes
|
||||
shared_loader_obj = SharedPluginLoaderObj()
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||||
|
||||
queued = False
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||||
starting_worker = self._cur_worker
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||||
while True:
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||||
(worker_prc, rslt_q) = self._workers[self._cur_worker]
|
||||
if worker_prc is None or not worker_prc.is_alive():
|
||||
worker_prc = WorkerProcess(self._final_q, task_vars, host, task, play_context, self._loader, self._variable_manager, shared_loader_obj)
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self._workers[self._cur_worker][0] = worker_prc
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worker_prc.start()
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display.debug("worker is %d (out of %d available)" % (self._cur_worker+1, len(self._workers)))
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queued = True
|
||||
self._cur_worker += 1
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||||
if self._cur_worker >= len(self._workers):
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self._cur_worker = 0
|
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if queued:
|
||||
break
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||||
elif self._cur_worker == starting_worker:
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||||
time.sleep(0.0001)
|
||||
|
||||
self._pending_results += 1
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||||
except (EOFError, IOError, AssertionError) as e:
|
||||
# most likely an abort
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||||
display.debug("got an error while queuing: %s" % e)
|
||||
return
|
||||
display.debug("exiting _queue_task() for %s/%s" % (host.name, task.action))
|
||||
|
||||
def _process_pending_results(self, iterator, one_pass=False):
|
||||
def _process_pending_results(self, iterator, one_pass=False, timeout=0.001):
|
||||
'''
|
||||
Reads results off the final queue and takes appropriate action
|
||||
based on the result (executing callbacks, updating state, etc.).
|
||||
|
@ -276,10 +188,10 @@ class StrategyBase:
|
|||
else:
|
||||
return False
|
||||
|
||||
passes = 0
|
||||
while not self._tqm._terminated:
|
||||
passes = 1
|
||||
while not self._tqm._terminated and passes < 3:
|
||||
try:
|
||||
task_result = self._final_q.get(timeout=0.001)
|
||||
task_result = self._final_q.get(timeout=timeout)
|
||||
original_host = get_original_host(task_result._host)
|
||||
original_task = iterator.get_original_task(original_host, task_result._task)
|
||||
task_result._host = original_host
|
||||
|
@ -489,8 +401,6 @@ class StrategyBase:
|
|||
|
||||
except Queue.Empty:
|
||||
passes += 1
|
||||
if passes > 2:
|
||||
break
|
||||
|
||||
if one_pass:
|
||||
break
|
||||
|
@ -506,14 +416,18 @@ class StrategyBase:
|
|||
ret_results = []
|
||||
|
||||
display.debug("waiting for pending results...")
|
||||
dead_check = 10
|
||||
while self._pending_results > 0 and not self._tqm._terminated:
|
||||
|
||||
if self._tqm.has_dead_workers():
|
||||
raise AnsibleError("A worker was found in a dead state")
|
||||
|
||||
results = self._process_pending_results(iterator)
|
||||
ret_results.extend(results)
|
||||
|
||||
dead_check -= 1
|
||||
if dead_check == 0:
|
||||
if self._pending_results > 0 and self._tqm.has_dead_workers():
|
||||
raise AnsibleError("A worker was found in a dead state")
|
||||
dead_check = 10
|
||||
|
||||
display.debug("no more pending results, returning what we have")
|
||||
|
||||
return ret_results
|
||||
|
|
|
@ -181,7 +181,9 @@ class StrategyModule(StrategyBase):
|
|||
any_errors_fatal = False
|
||||
|
||||
results = []
|
||||
items_to_queue = []
|
||||
for (host, task) in host_tasks:
|
||||
|
||||
if not task:
|
||||
continue
|
||||
|
||||
|
@ -252,14 +254,20 @@ class StrategyModule(StrategyBase):
|
|||
display.debug("sending task start callback")
|
||||
|
||||
self._blocked_hosts[host.get_name()] = True
|
||||
self._queue_task(host, task, task_vars, play_context)
|
||||
items_to_queue.append((host, task, task_vars))
|
||||
self._pending_results += 1
|
||||
del task_vars
|
||||
|
||||
# if we're bypassing the host loop, break out now
|
||||
if run_once:
|
||||
break
|
||||
|
||||
results += self._process_pending_results(iterator, one_pass=True)
|
||||
# FIXME: probably not required here any more with the result proc
|
||||
# having been removed, so there's no only a single result
|
||||
# queue for the main thread
|
||||
#results += self._process_pending_results(iterator, one_pass=True)
|
||||
|
||||
self._tqm.queue_multiple_tasks(items_to_queue, play_context)
|
||||
|
||||
# go to next host/task group
|
||||
if skip_rest:
|
||||
|
|
|
@ -121,45 +121,44 @@ class TestStrategyBase(unittest.TestCase):
|
|||
mock_tqm._unreachable_hosts = ["host02"]
|
||||
self.assertEqual(strategy_base.get_hosts_remaining(play=mock_play), mock_hosts[2:])
|
||||
|
||||
@patch.object(WorkerProcess, 'run')
|
||||
def test_strategy_base_queue_task(self, mock_worker):
|
||||
def fake_run(self):
|
||||
return
|
||||
#@patch.object(WorkerProcess, 'run')
|
||||
#def test_strategy_base_queue_task(self, mock_worker):
|
||||
# def fake_run(self):
|
||||
# return
|
||||
|
||||
mock_worker.run.side_effect = fake_run
|
||||
# mock_worker.run.side_effect = fake_run
|
||||
|
||||
fake_loader = DictDataLoader()
|
||||
mock_var_manager = MagicMock()
|
||||
mock_host = MagicMock()
|
||||
mock_host.has_hostkey = True
|
||||
mock_inventory = MagicMock()
|
||||
mock_options = MagicMock()
|
||||
mock_options.module_path = None
|
||||
# fake_loader = DictDataLoader()
|
||||
# mock_var_manager = MagicMock()
|
||||
# mock_host = MagicMock()
|
||||
# mock_host.has_hostkey = True
|
||||
# mock_inventory = MagicMock()
|
||||
# mock_options = MagicMock()
|
||||
# mock_options.module_path = None
|
||||
|
||||
tqm = TaskQueueManager(
|
||||
inventory=mock_inventory,
|
||||
variable_manager=mock_var_manager,
|
||||
loader=fake_loader,
|
||||
options=mock_options,
|
||||
passwords=None,
|
||||
)
|
||||
tqm._initialize_processes(3)
|
||||
tqm.hostvars = dict()
|
||||
|
||||
try:
|
||||
strategy_base = StrategyBase(tqm=tqm)
|
||||
strategy_base._queue_task(host=mock_host, task=MagicMock(), task_vars=dict(), play_context=MagicMock())
|
||||
self.assertEqual(strategy_base._cur_worker, 1)
|
||||
self.assertEqual(strategy_base._pending_results, 1)
|
||||
strategy_base._queue_task(host=mock_host, task=MagicMock(), task_vars=dict(), play_context=MagicMock())
|
||||
self.assertEqual(strategy_base._cur_worker, 2)
|
||||
self.assertEqual(strategy_base._pending_results, 2)
|
||||
strategy_base._queue_task(host=mock_host, task=MagicMock(), task_vars=dict(), play_context=MagicMock())
|
||||
self.assertEqual(strategy_base._cur_worker, 0)
|
||||
self.assertEqual(strategy_base._pending_results, 3)
|
||||
finally:
|
||||
tqm.cleanup()
|
||||
# tqm = TaskQueueManager(
|
||||
# inventory=mock_inventory,
|
||||
# variable_manager=mock_var_manager,
|
||||
# loader=fake_loader,
|
||||
# options=mock_options,
|
||||
# passwords=None,
|
||||
# )
|
||||
# tqm._initialize_processes(3)
|
||||
# tqm.hostvars = dict()
|
||||
|
||||
# try:
|
||||
# strategy_base = StrategyBase(tqm=tqm)
|
||||
# strategy_base._queue_task(host=mock_host, task=MagicMock(), task_vars=dict(), play_context=MagicMock())
|
||||
# self.assertEqual(strategy_base._cur_worker, 1)
|
||||
# self.assertEqual(strategy_base._pending_results, 1)
|
||||
# strategy_base._queue_task(host=mock_host, task=MagicMock(), task_vars=dict(), play_context=MagicMock())
|
||||
# self.assertEqual(strategy_base._cur_worker, 2)
|
||||
# self.assertEqual(strategy_base._pending_results, 2)
|
||||
# strategy_base._queue_task(host=mock_host, task=MagicMock(), task_vars=dict(), play_context=MagicMock())
|
||||
# self.assertEqual(strategy_base._cur_worker, 0)
|
||||
# self.assertEqual(strategy_base._pending_results, 3)
|
||||
# finally:
|
||||
# tqm.cleanup()
|
||||
|
||||
def test_strategy_base_process_pending_results(self):
|
||||
mock_tqm = MagicMock()
|
||||
|
|
|
@ -25,7 +25,7 @@ from ansible.compat.tests.mock import patch, MagicMock
|
|||
from ansible import constants as C
|
||||
from ansible.errors import *
|
||||
from ansible.plugins import filter_loader, lookup_loader, module_loader
|
||||
from ansible.plugins.strategy import SharedPluginLoaderObj
|
||||
from ansible.executor.task_queue_manager import SharedPluginLoaderObj
|
||||
from ansible.template import Templar
|
||||
|
||||
from units.mock.loader import DictDataLoader
|
||||
|
|
Loading…
Reference in a new issue