mirror of
https://github.com/ansible-collections/community.general.git
synced 2025-06-29 19:50:25 -07:00
Moving result reading to a background thread
This commit is contained in:
James Cammarata
parent
dfb1c0647e
commit
5a57c66e3c
7 changed files with 382 additions and 246 deletions
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@ -19,14 +19,18 @@
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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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 multiprocessing import Lock
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from jinja2.exceptions import UndefinedError
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from ansible.compat.six.moves import queue as Queue
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from ansible.compat.six import iteritems, string_types
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from ansible.errors import AnsibleError, AnsibleParserError, AnsibleUndefinedVariable
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from ansible.executor import action_write_locks
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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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@ -50,25 +54,6 @@ 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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@ -86,6 +71,25 @@ class SharedPluginLoaderObj:
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self.module_loader = module_loader
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_sentinel = object()
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def results_thread_main(strategy):
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#print("RESULT THREAD STARTING: %s" % threading.current_thread())
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while True:
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try:
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result = strategy._final_q.get()
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if type(result) == object:
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break
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else:
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#print("result in thread is: %s" % result._result)
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strategy._results_lock.acquire()
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strategy._results.append(result)
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strategy._results_lock.release()
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except (IOError, EOFError):
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break
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except Queue.Empty:
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pass
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#print("RESULT THREAD EXITED: %s" % threading.current_thread())
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class StrategyBase:
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'''
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@ -104,6 +108,7 @@ class StrategyBase:
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self._final_q = tqm._final_q
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self._step = getattr(tqm._options, 'step', False)
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self._diff = getattr(tqm._options, 'diff', False)
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# Backwards compat: self._display isn't really needed, just import the global display and use that.
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self._display = display
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@ -115,6 +120,18 @@ class StrategyBase:
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# outstanding tasks still in queue
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self._blocked_hosts = dict()
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self._results = deque()
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self._results_lock = threading.Condition(threading.Lock())
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#print("creating thread for strategy %s" % id(self))
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self._results_thread = threading.Thread(target=results_thread_main, args=(self,))
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self._results_thread.daemon = True
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self._results_thread.start()
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def cleanup(self):
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self._final_q.put(_sentinel)
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self._results_thread.join()
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def run(self, iterator, play_context, result=0):
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# save the failed/unreachable hosts, as the run_handlers()
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# method will clear that information during its execution
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@ -174,10 +191,9 @@ class StrategyBase:
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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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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[task.action] = Lock()
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action_write_locks.action_write_locks[task.action] = Lock()
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# and then queue the new task
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try:
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@ -211,7 +227,7 @@ class StrategyBase:
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return
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display.debug("exiting _queue_task() for %s/%s" % (host.name, task.action))
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def _process_pending_results(self, iterator, one_pass=False):
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def _process_pending_results(self, iterator, one_pass=False, max_passes=None):
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'''
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Reads results off the final queue and takes appropriate action
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based on the result (executing callbacks, updating state, etc.).
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@ -270,228 +286,232 @@ class StrategyBase:
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else:
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return False
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passes = 0
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while not self._tqm._terminated:
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cur_pass = 0
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while True:
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try:
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task_result = self._final_q.get(timeout=0.001)
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original_host = get_original_host(task_result._host)
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original_task = iterator.get_original_task(original_host, task_result._task)
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task_result._host = original_host
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task_result._task = original_task
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self._results_lock.acquire()
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task_result = self._results.pop()
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except IndexError:
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break
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finally:
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self._results_lock.release()
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# send callbacks for 'non final' results
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if '_ansible_retry' in task_result._result:
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self._tqm.send_callback('v2_runner_retry', task_result)
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continue
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elif '_ansible_item_result' in task_result._result:
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if task_result.is_failed() or task_result.is_unreachable():
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self._tqm.send_callback('v2_runner_item_on_failed', task_result)
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elif task_result.is_skipped():
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self._tqm.send_callback('v2_runner_item_on_skipped', task_result)
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else:
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if 'diff' in task_result._result:
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if self._diff:
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self._tqm.send_callback('v2_on_file_diff', task_result)
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self._tqm.send_callback('v2_runner_item_on_ok', task_result)
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continue
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original_host = get_original_host(task_result._host)
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original_task = iterator.get_original_task(original_host, task_result._task)
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task_result._host = original_host
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task_result._task = original_task
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if original_task.register:
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if original_task.run_once:
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host_list = [host for host in self._inventory.get_hosts(iterator._play.hosts) if host.name not in self._tqm._unreachable_hosts]
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else:
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host_list = [original_host]
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clean_copy = strip_internal_keys(task_result._result)
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if 'invocation' in clean_copy:
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del clean_copy['invocation']
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for target_host in host_list:
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self._variable_manager.set_nonpersistent_facts(target_host, {original_task.register: clean_copy})
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# all host status messages contain 2 entries: (msg, task_result)
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role_ran = False
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if task_result.is_failed():
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role_ran = True
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if not original_task.ignore_errors:
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display.debug("marking %s as failed" % original_host.name)
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if original_task.run_once:
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# if we're using run_once, we have to fail every host here
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for h in self._inventory.get_hosts(iterator._play.hosts):
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if h.name not in self._tqm._unreachable_hosts:
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state, _ = iterator.get_next_task_for_host(h, peek=True)
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iterator.mark_host_failed(h)
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state, new_task = iterator.get_next_task_for_host(h, peek=True)
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else:
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iterator.mark_host_failed(original_host)
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# only add the host to the failed list officially if it has
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# been failed by the iterator
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if iterator.is_failed(original_host):
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self._tqm._failed_hosts[original_host.name] = True
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self._tqm._stats.increment('failures', original_host.name)
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else:
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# otherwise, we grab the current state and if we're iterating on
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# the rescue portion of a block then we save the failed task in a
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# special var for use within the rescue/always
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state, _ = iterator.get_next_task_for_host(original_host, peek=True)
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if state.run_state == iterator.ITERATING_RESCUE:
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self._variable_manager.set_nonpersistent_facts(
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original_host,
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dict(
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ansible_failed_task=original_task.serialize(),
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ansible_failed_result=task_result._result,
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),
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)
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else:
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self._tqm._stats.increment('ok', original_host.name)
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self._tqm.send_callback('v2_runner_on_failed', task_result, ignore_errors=original_task.ignore_errors)
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elif task_result.is_unreachable():
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self._tqm._unreachable_hosts[original_host.name] = True
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self._tqm._stats.increment('dark', original_host.name)
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self._tqm.send_callback('v2_runner_on_unreachable', task_result)
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# send callbacks for 'non final' results
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if '_ansible_retry' in task_result._result:
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self._tqm.send_callback('v2_runner_retry', task_result)
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continue
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elif '_ansible_item_result' in task_result._result:
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if task_result.is_failed() or task_result.is_unreachable():
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self._tqm.send_callback('v2_runner_item_on_failed', task_result)
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elif task_result.is_skipped():
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self._tqm._stats.increment('skipped', original_host.name)
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self._tqm.send_callback('v2_runner_on_skipped', task_result)
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self._tqm.send_callback('v2_runner_item_on_skipped', task_result)
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else:
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role_ran = True
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if original_task.loop:
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# this task had a loop, and has more than one result, so
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# loop over all of them instead of a single result
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result_items = task_result._result.get('results', [])
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else:
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result_items = [ task_result._result ]
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for result_item in result_items:
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if '_ansible_notify' in result_item:
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if task_result.is_changed():
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# The shared dictionary for notified handlers is a proxy, which
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# does not detect when sub-objects within the proxy are modified.
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# So, per the docs, we reassign the list so the proxy picks up and
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# notifies all other threads
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for handler_name in result_item['_ansible_notify']:
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# Find the handler using the above helper. First we look up the
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# dependency chain of the current task (if it's from a role), otherwise
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# we just look through the list of handlers in the current play/all
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# roles and use the first one that matches the notify name
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if handler_name in self._listening_handlers:
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for listening_handler_name in self._listening_handlers[handler_name]:
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listening_handler = search_handler_blocks(listening_handler_name, iterator._play.handlers)
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if listening_handler is None:
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raise AnsibleError("The requested handler listener '%s' was not found in any of the known handlers" % listening_handler_name)
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if original_host not in self._notified_handlers[listening_handler]:
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self._notified_handlers[listening_handler].append(original_host)
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display.vv("NOTIFIED HANDLER %s" % (listening_handler_name,))
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else:
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target_handler = search_handler_blocks(handler_name, iterator._play.handlers)
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if target_handler is not None:
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if original_host not in self._notified_handlers[target_handler]:
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self._notified_handlers[target_handler].append(original_host)
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# FIXME: should this be a callback?
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display.vv("NOTIFIED HANDLER %s" % (handler_name,))
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else:
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# As there may be more than one handler with the notified name as the
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# parent, so we just keep track of whether or not we found one at all
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found = False
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for target_handler in self._notified_handlers:
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if parent_handler_match(target_handler, handler_name):
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self._notified_handlers[target_handler].append(original_host)
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display.vv("NOTIFIED HANDLER %s" % (target_handler.get_name(),))
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found = True
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# and if none were found, then we raise an error
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if not found:
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raise AnsibleError("The requested handler '%s' was found in neither the main handlers list nor the listening handlers list" % handler_name)
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if 'add_host' in result_item:
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# this task added a new host (add_host module)
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new_host_info = result_item.get('add_host', dict())
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self._add_host(new_host_info, iterator)
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elif 'add_group' in result_item:
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# this task added a new group (group_by module)
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self._add_group(original_host, result_item)
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elif 'ansible_facts' in result_item:
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loop_var = 'item'
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if original_task.loop_control:
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loop_var = original_task.loop_control.loop_var or 'item'
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item = result_item.get(loop_var, None)
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if original_task.action == 'include_vars':
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for (var_name, var_value) in iteritems(result_item['ansible_facts']):
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# find the host we're actually refering too here, which may
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# be a host that is not really in inventory at all
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if original_task.delegate_to is not None and original_task.delegate_facts:
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task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=original_task)
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self.add_tqm_variables(task_vars, play=iterator._play)
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if item is not None:
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task_vars[loop_var] = item
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templar = Templar(loader=self._loader, variables=task_vars)
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host_name = templar.template(original_task.delegate_to)
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actual_host = self._inventory.get_host(host_name)
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if actual_host is None:
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actual_host = Host(name=host_name)
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else:
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actual_host = original_host
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if original_task.run_once:
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host_list = [host for host in self._inventory.get_hosts(iterator._play.hosts) if host.name not in self._tqm._unreachable_hosts]
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else:
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host_list = [actual_host]
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for target_host in host_list:
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self._variable_manager.set_host_variable(target_host, var_name, var_value)
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else:
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if original_task.run_once:
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host_list = [host for host in self._inventory.get_hosts(iterator._play.hosts) if host.name not in self._tqm._unreachable_hosts]
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else:
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host_list = [original_host]
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for target_host in host_list:
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if original_task.action == 'set_fact':
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self._variable_manager.set_nonpersistent_facts(target_host, result_item['ansible_facts'].copy())
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else:
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self._variable_manager.set_host_facts(target_host, result_item['ansible_facts'].copy())
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if 'diff' in task_result._result:
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if self._diff:
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self._tqm.send_callback('v2_on_file_diff', task_result)
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self._tqm.send_callback('v2_runner_item_on_ok', task_result)
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continue
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if original_task.action not in ['include', 'include_role']:
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self._tqm._stats.increment('ok', original_host.name)
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if 'changed' in task_result._result and task_result._result['changed']:
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self._tqm._stats.increment('changed', original_host.name)
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if original_task.register:
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#print("^ REGISTERING RESULT %s" % original_task.register)
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if original_task.run_once:
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host_list = [host for host in self._inventory.get_hosts(iterator._play.hosts) if host.name not in self._tqm._unreachable_hosts]
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else:
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host_list = [original_host]
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# finally, send the ok for this task
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self._tqm.send_callback('v2_runner_on_ok', task_result)
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clean_copy = strip_internal_keys(task_result._result)
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if 'invocation' in clean_copy:
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del clean_copy['invocation']
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self._pending_results -= 1
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if original_host.name in self._blocked_hosts:
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del self._blocked_hosts[original_host.name]
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for target_host in host_list:
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self._variable_manager.set_nonpersistent_facts(target_host, {original_task.register: clean_copy})
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# If this is a role task, mark the parent role as being run (if
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# the task was ok or failed, but not skipped or unreachable)
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if original_task._role is not None and role_ran: #TODO: and original_task.action != 'include_role':?
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# lookup the role in the ROLE_CACHE to make sure we're dealing
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# with the correct object and mark it as executed
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for (entry, role_obj) in iteritems(iterator._play.ROLE_CACHE[original_task._role._role_name]):
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if role_obj._uuid == original_task._role._uuid:
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role_obj._had_task_run[original_host.name] = True
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# all host status messages contain 2 entries: (msg, task_result)
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role_ran = False
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if task_result.is_failed():
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role_ran = True
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if not original_task.ignore_errors:
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display.debug("marking %s as failed" % original_host.name)
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if original_task.run_once:
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# if we're using run_once, we have to fail every host here
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for h in self._inventory.get_hosts(iterator._play.hosts):
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if h.name not in self._tqm._unreachable_hosts:
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state, _ = iterator.get_next_task_for_host(h, peek=True)
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iterator.mark_host_failed(h)
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state, new_task = iterator.get_next_task_for_host(h, peek=True)
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else:
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iterator.mark_host_failed(original_host)
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ret_results.append(task_result)
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# only add the host to the failed list officially if it has
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# been failed by the iterator
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if iterator.is_failed(original_host):
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self._tqm._failed_hosts[original_host.name] = True
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self._tqm._stats.increment('failures', original_host.name)
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else:
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||||
# otherwise, we grab the current state and if we're iterating on
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||||
# the rescue portion of a block then we save the failed task in a
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# special var for use within the rescue/always
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||||
state, _ = iterator.get_next_task_for_host(original_host, peek=True)
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||||
if state.run_state == iterator.ITERATING_RESCUE:
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self._variable_manager.set_nonpersistent_facts(
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original_host,
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dict(
|
||||
ansible_failed_task=original_task.serialize(),
|
||||
ansible_failed_result=task_result._result,
|
||||
),
|
||||
)
|
||||
else:
|
||||
self._tqm._stats.increment('ok', original_host.name)
|
||||
self._tqm.send_callback('v2_runner_on_failed', task_result, ignore_errors=original_task.ignore_errors)
|
||||
elif task_result.is_unreachable():
|
||||
self._tqm._unreachable_hosts[original_host.name] = True
|
||||
self._tqm._stats.increment('dark', original_host.name)
|
||||
self._tqm.send_callback('v2_runner_on_unreachable', task_result)
|
||||
elif task_result.is_skipped():
|
||||
self._tqm._stats.increment('skipped', original_host.name)
|
||||
self._tqm.send_callback('v2_runner_on_skipped', task_result)
|
||||
else:
|
||||
role_ran = True
|
||||
|
||||
except Queue.Empty:
|
||||
passes += 1
|
||||
if passes > 2:
|
||||
break
|
||||
if original_task.loop:
|
||||
# this task had a loop, and has more than one result, so
|
||||
# loop over all of them instead of a single result
|
||||
result_items = task_result._result.get('results', [])
|
||||
else:
|
||||
result_items = [ task_result._result ]
|
||||
|
||||
if one_pass:
|
||||
for result_item in result_items:
|
||||
if '_ansible_notify' in result_item:
|
||||
if task_result.is_changed():
|
||||
# The shared dictionary for notified handlers is a proxy, which
|
||||
# does not detect when sub-objects within the proxy are modified.
|
||||
# So, per the docs, we reassign the list so the proxy picks up and
|
||||
# notifies all other threads
|
||||
for handler_name in result_item['_ansible_notify']:
|
||||
# Find the handler using the above helper. First we look up the
|
||||
# dependency chain of the current task (if it's from a role), otherwise
|
||||
# we just look through the list of handlers in the current play/all
|
||||
# roles and use the first one that matches the notify name
|
||||
if handler_name in self._listening_handlers:
|
||||
for listening_handler_name in self._listening_handlers[handler_name]:
|
||||
listening_handler = search_handler_blocks(listening_handler_name, iterator._play.handlers)
|
||||
if listening_handler is None:
|
||||
raise AnsibleError("The requested handler listener '%s' was not found in any of the known handlers" % listening_handler_name)
|
||||
if original_host not in self._notified_handlers[listening_handler]:
|
||||
self._notified_handlers[listening_handler].append(original_host)
|
||||
display.vv("NOTIFIED HANDLER %s" % (listening_handler_name,))
|
||||
|
||||
else:
|
||||
target_handler = search_handler_blocks(handler_name, iterator._play.handlers)
|
||||
if target_handler is not None:
|
||||
if original_host not in self._notified_handlers[target_handler]:
|
||||
self._notified_handlers[target_handler].append(original_host)
|
||||
# FIXME: should this be a callback?
|
||||
display.vv("NOTIFIED HANDLER %s" % (handler_name,))
|
||||
else:
|
||||
# As there may be more than one handler with the notified name as the
|
||||
# parent, so we just keep track of whether or not we found one at all
|
||||
found = False
|
||||
for target_handler in self._notified_handlers:
|
||||
if parent_handler_match(target_handler, handler_name):
|
||||
self._notified_handlers[target_handler].append(original_host)
|
||||
display.vv("NOTIFIED HANDLER %s" % (target_handler.get_name(),))
|
||||
found = True
|
||||
|
||||
# and if none were found, then we raise an error
|
||||
if not found:
|
||||
raise AnsibleError("The requested handler '%s' was found in neither the main handlers list nor the listening handlers list" % handler_name)
|
||||
|
||||
|
||||
if 'add_host' in result_item:
|
||||
# this task added a new host (add_host module)
|
||||
new_host_info = result_item.get('add_host', dict())
|
||||
self._add_host(new_host_info, iterator)
|
||||
|
||||
elif 'add_group' in result_item:
|
||||
# this task added a new group (group_by module)
|
||||
self._add_group(original_host, result_item)
|
||||
|
||||
elif 'ansible_facts' in result_item:
|
||||
loop_var = 'item'
|
||||
if original_task.loop_control:
|
||||
loop_var = original_task.loop_control.loop_var or 'item'
|
||||
|
||||
item = result_item.get(loop_var, None)
|
||||
|
||||
if original_task.action == 'include_vars':
|
||||
for (var_name, var_value) in iteritems(result_item['ansible_facts']):
|
||||
# find the host we're actually refering too here, which may
|
||||
# be a host that is not really in inventory at all
|
||||
if original_task.delegate_to is not None and original_task.delegate_facts:
|
||||
task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=original_task)
|
||||
self.add_tqm_variables(task_vars, play=iterator._play)
|
||||
if item is not None:
|
||||
task_vars[loop_var] = item
|
||||
templar = Templar(loader=self._loader, variables=task_vars)
|
||||
host_name = templar.template(original_task.delegate_to)
|
||||
actual_host = self._inventory.get_host(host_name)
|
||||
if actual_host is None:
|
||||
actual_host = Host(name=host_name)
|
||||
else:
|
||||
actual_host = original_host
|
||||
|
||||
if original_task.run_once:
|
||||
host_list = [host for host in self._inventory.get_hosts(iterator._play.hosts) if host.name not in self._tqm._unreachable_hosts]
|
||||
else:
|
||||
host_list = [actual_host]
|
||||
|
||||
for target_host in host_list:
|
||||
self._variable_manager.set_host_variable(target_host, var_name, var_value)
|
||||
else:
|
||||
if original_task.run_once:
|
||||
host_list = [host for host in self._inventory.get_hosts(iterator._play.hosts) if host.name not in self._tqm._unreachable_hosts]
|
||||
else:
|
||||
host_list = [original_host]
|
||||
|
||||
for target_host in host_list:
|
||||
if original_task.action == 'set_fact':
|
||||
self._variable_manager.set_nonpersistent_facts(target_host, result_item['ansible_facts'].copy())
|
||||
else:
|
||||
self._variable_manager.set_host_facts(target_host, result_item['ansible_facts'].copy())
|
||||
|
||||
if 'diff' in task_result._result:
|
||||
if self._diff:
|
||||
self._tqm.send_callback('v2_on_file_diff', task_result)
|
||||
|
||||
if original_task.action not in ['include', 'include_role']:
|
||||
self._tqm._stats.increment('ok', original_host.name)
|
||||
if 'changed' in task_result._result and task_result._result['changed']:
|
||||
self._tqm._stats.increment('changed', original_host.name)
|
||||
|
||||
# finally, send the ok for this task
|
||||
self._tqm.send_callback('v2_runner_on_ok', task_result)
|
||||
|
||||
self._pending_results -= 1
|
||||
if original_host.name in self._blocked_hosts:
|
||||
del self._blocked_hosts[original_host.name]
|
||||
|
||||
# If this is a role task, mark the parent role as being run (if
|
||||
# the task was ok or failed, but not skipped or unreachable)
|
||||
if original_task._role is not None and role_ran: #TODO: and original_task.action != 'include_role':?
|
||||
# lookup the role in the ROLE_CACHE to make sure we're dealing
|
||||
# with the correct object and mark it as executed
|
||||
for (entry, role_obj) in iteritems(iterator._play.ROLE_CACHE[original_task._role._role_name]):
|
||||
if role_obj._uuid == original_task._role._uuid:
|
||||
role_obj._had_task_run[original_host.name] = True
|
||||
|
||||
ret_results.append(task_result)
|
||||
|
||||
if one_pass or max_passes is not None and (cur_pass+1) >= max_passes:
|
||||
break
|
||||
|
||||
cur_pass += 1
|
||||
|
||||
return ret_results
|
||||
|
||||
def _wait_on_pending_results(self, iterator):
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue