mirror of
https://github.com/ansible-collections/community.general.git
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288 lines
12 KiB
Python
288 lines
12 KiB
Python
# (c) 2012-2014, 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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# 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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import os
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from ansible import constants as C
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from ansible.executor.task_queue_manager import TaskQueueManager
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from ansible.module_utils._text import to_native, to_text
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from ansible.playbook import Playbook
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from ansible.template import Templar
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from ansible.utils.helpers import pct_to_int
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from ansible.utils.path import makedirs_safe
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from ansible.utils.ssh_functions import check_for_controlpersist
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try:
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from __main__ import display
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except ImportError:
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from ansible.utils.display import Display
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display = Display()
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class PlaybookExecutor:
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'''
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This is the primary class for executing playbooks, and thus the
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basis for bin/ansible-playbook operation.
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'''
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def __init__(self, playbooks, inventory, variable_manager, loader, options, passwords):
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self._playbooks = playbooks
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self._inventory = inventory
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self._variable_manager = variable_manager
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self._loader = loader
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self._options = options
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self.passwords = passwords
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self._unreachable_hosts = dict()
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if options.listhosts or options.listtasks or options.listtags or options.syntax:
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self._tqm = None
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else:
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self._tqm = TaskQueueManager(inventory=inventory, variable_manager=variable_manager, loader=loader, options=options, passwords=self.passwords)
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# Note: We run this here to cache whether the default ansible ssh
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# executable supports control persist. Sometime in the future we may
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# need to enhance this to check that ansible_ssh_executable specified
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# in inventory is also cached. We can't do this caching at the point
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# where it is used (in task_executor) because that is post-fork and
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# therefore would be discarded after every task.
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check_for_controlpersist(C.ANSIBLE_SSH_EXECUTABLE)
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def run(self):
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'''
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Run the given playbook, based on the settings in the play which
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may limit the runs to serialized groups, etc.
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'''
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result = 0
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entrylist = []
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entry = {}
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try:
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for playbook_path in self._playbooks:
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pb = Playbook.load(playbook_path, variable_manager=self._variable_manager, loader=self._loader)
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# FIXME: move out of inventory self._inventory.set_playbook_basedir(os.path.realpath(os.path.dirname(playbook_path)))
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if self._tqm is None: # we are doing a listing
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entry = {'playbook': playbook_path}
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entry['plays'] = []
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else:
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# make sure the tqm has callbacks loaded
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self._tqm.load_callbacks()
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self._tqm.send_callback('v2_playbook_on_start', pb)
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i = 1
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plays = pb.get_plays()
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display.vv(u'%d plays in %s' % (len(plays), to_text(playbook_path)))
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for play in plays:
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if play._included_path is not None:
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self._loader.set_basedir(play._included_path)
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else:
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self._loader.set_basedir(pb._basedir)
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# clear any filters which may have been applied to the inventory
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self._inventory.remove_restriction()
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if play.vars_prompt:
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for var in play.vars_prompt:
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vname = var['name']
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prompt = var.get("prompt", vname)
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default = var.get("default", None)
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private = var.get("private", True)
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confirm = var.get("confirm", False)
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encrypt = var.get("encrypt", None)
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salt_size = var.get("salt_size", None)
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salt = var.get("salt", None)
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if vname not in self._variable_manager.extra_vars:
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if self._tqm:
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self._tqm.send_callback('v2_playbook_on_vars_prompt', vname, private, prompt, encrypt, confirm, salt_size, salt, default)
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play.vars[vname] = display.do_var_prompt(vname, private, prompt, encrypt, confirm, salt_size, salt, default)
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else: # we are either in --list-<option> or syntax check
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play.vars[vname] = default
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# Create a temporary copy of the play here, so we can run post_validate
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# on it without the templating changes affecting the original object.
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all_vars = self._variable_manager.get_vars(play=play)
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templar = Templar(loader=self._loader, variables=all_vars)
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new_play = play.copy()
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new_play.post_validate(templar)
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if self._options.syntax:
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continue
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if self._tqm is None:
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# we are just doing a listing
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entry['plays'].append(new_play)
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else:
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self._tqm._unreachable_hosts.update(self._unreachable_hosts)
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previously_failed = len(self._tqm._failed_hosts)
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previously_unreachable = len(self._tqm._unreachable_hosts)
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break_play = False
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# we are actually running plays
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batches = self._get_serialized_batches(new_play)
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if len(batches) == 0:
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self._tqm.send_callback('v2_playbook_on_play_start', new_play)
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self._tqm.send_callback('v2_playbook_on_no_hosts_matched')
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for batch in batches:
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# restrict the inventory to the hosts in the serialized batch
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self._inventory.restrict_to_hosts(batch)
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# and run it...
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result = self._tqm.run(play=play)
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# break the play if the result equals the special return code
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if result & self._tqm.RUN_FAILED_BREAK_PLAY != 0:
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result = self._tqm.RUN_FAILED_HOSTS
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break_play = True
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# check the number of failures here, to see if they're above the maximum
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# failure percentage allowed, or if any errors are fatal. If either of those
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# conditions are met, we break out, otherwise we only break out if the entire
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# batch failed
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failed_hosts_count = len(self._tqm._failed_hosts) + len(self._tqm._unreachable_hosts) - \
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(previously_failed + previously_unreachable)
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if len(batch) == failed_hosts_count:
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break_play = True
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break
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# update the previous counts so they don't accumulate incorrectly
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# over multiple serial batches
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previously_failed += len(self._tqm._failed_hosts) - previously_failed
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previously_unreachable += len(self._tqm._unreachable_hosts) - previously_unreachable
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# save the unreachable hosts from this batch
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self._unreachable_hosts.update(self._tqm._unreachable_hosts)
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if break_play:
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break
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i = i + 1 # per play
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if entry:
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entrylist.append(entry) # per playbook
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# send the stats callback for this playbook
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if self._tqm is not None:
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if C.RETRY_FILES_ENABLED:
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retries = set(self._tqm._failed_hosts.keys())
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retries.update(self._tqm._unreachable_hosts.keys())
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retries = sorted(retries)
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if len(retries) > 0:
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if C.RETRY_FILES_SAVE_PATH:
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basedir = C.shell_expand(C.RETRY_FILES_SAVE_PATH)
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elif playbook_path:
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basedir = os.path.dirname(os.path.abspath(playbook_path))
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else:
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basedir = '~/'
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(retry_name, _) = os.path.splitext(os.path.basename(playbook_path))
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filename = os.path.join(basedir, "%s.retry" % retry_name)
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if self._generate_retry_inventory(filename, retries):
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display.display("\tto retry, use: --limit @%s\n" % filename)
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self._tqm.send_callback('v2_playbook_on_stats', self._tqm._stats)
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# if the last result wasn't zero, break out of the playbook file name loop
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if result != 0:
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break
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if entrylist:
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return entrylist
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finally:
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if self._tqm is not None:
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self._tqm.cleanup()
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if self._loader:
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self._loader.cleanup_all_tmp_files()
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if self._options.syntax:
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display.display("No issues encountered")
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return result
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return result
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def _get_serialized_batches(self, play):
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'''
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Returns a list of hosts, subdivided into batches based on
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the serial size specified in the play.
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'''
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# make sure we have a unique list of hosts
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all_hosts = self._inventory.get_hosts(play.hosts)
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all_hosts_len = len(all_hosts)
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# the serial value can be listed as a scalar or a list of
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# scalars, so we make sure it's a list here
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serial_batch_list = play.serial
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if len(serial_batch_list) == 0:
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serial_batch_list = [-1]
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cur_item = 0
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serialized_batches = []
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while len(all_hosts) > 0:
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# get the serial value from current item in the list
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serial = pct_to_int(serial_batch_list[cur_item], all_hosts_len)
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# if the serial count was not specified or is invalid, default to
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# a list of all hosts, otherwise grab a chunk of the hosts equal
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# to the current serial item size
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if serial <= 0:
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serialized_batches.append(all_hosts)
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break
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else:
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play_hosts = []
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for x in range(serial):
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if len(all_hosts) > 0:
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play_hosts.append(all_hosts.pop(0))
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serialized_batches.append(play_hosts)
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# increment the current batch list item number, and if we've hit
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# the end keep using the last element until we've consumed all of
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# the hosts in the inventory
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cur_item += 1
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if cur_item > len(serial_batch_list) - 1:
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cur_item = len(serial_batch_list) - 1
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return serialized_batches
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def _generate_retry_inventory(self, retry_path, replay_hosts):
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'''
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Called when a playbook run fails. It generates an inventory which allows
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re-running on ONLY the failed hosts. This may duplicate some variable
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information in group_vars/host_vars but that is ok, and expected.
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'''
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try:
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makedirs_safe(os.path.dirname(retry_path))
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with open(retry_path, 'w') as fd:
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for x in replay_hosts:
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fd.write("%s\n" % x)
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except Exception as e:
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display.warning("Could not create retry file '%s'.\n\t%s" % (retry_path, to_native(e)))
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return False
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return True
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