mirror of
https://github.com/ansible-collections/community.general.git
synced 2025-04-24 11:21:25 -07:00
7d49b27218
this should allow user to control how they want the playbook dirs inspected for additional vars, default now reverts to 2.3 behaviour (top). corrected paths order minor doc reword
649 lines
29 KiB
Python
649 lines
29 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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import sys
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from collections import defaultdict, MutableMapping
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try:
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from hashlib import sha1
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except ImportError:
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from sha import sha as sha1
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from jinja2.exceptions import UndefinedError
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from ansible import constants as C
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from ansible.errors import AnsibleError, AnsibleParserError, AnsibleUndefinedVariable, AnsibleFileNotFound
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from ansible.inventory.host import Host
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from ansible.inventory.helpers import sort_groups, get_group_vars
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from ansible.module_utils._text import to_native
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from ansible.module_utils.six import iteritems, string_types, text_type
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from ansible.plugins.loader import lookup_loader, vars_loader
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from ansible.plugins.cache import FactCache
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from ansible.template import Templar
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from ansible.utils.listify import listify_lookup_plugin_terms
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from ansible.utils.vars import combine_vars
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from ansible.utils.unsafe_proxy import wrap_var
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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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def preprocess_vars(a):
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'''
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Ensures that vars contained in the parameter passed in are
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returned as a list of dictionaries, to ensure for instance
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that vars loaded from a file conform to an expected state.
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'''
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if a is None:
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return None
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elif not isinstance(a, list):
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data = [a]
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else:
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data = a
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for item in data:
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if not isinstance(item, MutableMapping):
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raise AnsibleError("variable files must contain either a dictionary of variables, or a list of dictionaries. Got: %s (%s)" % (a, type(a)))
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return data
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def strip_internal_keys(dirty):
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'''
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All keys stating with _ansible_ are internal, so create a copy of the 'dirty' dict
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and remove them from the clean one before returning it
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'''
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clean = dirty.copy()
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for k in dirty.keys():
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if isinstance(k, string_types) and k.startswith('_ansible_'):
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del clean[k]
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elif isinstance(dirty[k], dict):
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clean[k] = strip_internal_keys(dirty[k])
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return clean
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def remove_internal_keys(data):
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'''
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More nuanced version of strip_internal_keys
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'''
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for key in list(data.keys()):
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if (key.startswith('_ansible_') and key != '_ansible_parsed') or key in C.INTERNAL_RESULT_KEYS:
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display.warning("Removed unexpected internal key in module return: %s = %s" % (key, data[key]))
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del data[key]
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# remove bad/empty internal keys
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for key in ['warnings', 'deprecations']:
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if key in data and not data[key]:
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del data[key]
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class VariableManager:
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_ALLOWED = frozenset(['plugins_by_group', 'groups_plugins_play', 'groups_plugins_inventory', 'groups_inventory',
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'all_plugins_play', 'all_plugins_inventory', 'all_inventory'])
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def __init__(self, loader=None, inventory=None):
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self._nonpersistent_fact_cache = defaultdict(dict)
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self._vars_cache = defaultdict(dict)
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self._extra_vars = defaultdict(dict)
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self._host_vars_files = defaultdict(dict)
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self._group_vars_files = defaultdict(dict)
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self._inventory = inventory
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self._loader = loader
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self._hostvars = None
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self._omit_token = '__omit_place_holder__%s' % sha1(os.urandom(64)).hexdigest()
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self._options_vars = defaultdict(dict)
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# bad cache plugin is not fatal error
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try:
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self._fact_cache = FactCache()
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except AnsibleError as e:
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display.warning(to_native(e))
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# fallback to a dict as in memory cache
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self._fact_cache = {}
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def __getstate__(self):
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data = dict(
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fact_cache=self._fact_cache,
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np_fact_cache=self._nonpersistent_fact_cache,
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vars_cache=self._vars_cache,
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extra_vars=self._extra_vars,
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host_vars_files=self._host_vars_files,
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group_vars_files=self._group_vars_files,
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omit_token=self._omit_token,
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options_vars=self._options_vars,
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inventory=self._inventory,
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)
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return data
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def __setstate__(self, data):
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self._fact_cache = data.get('fact_cache', defaultdict(dict))
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self._nonpersistent_fact_cache = data.get('np_fact_cache', defaultdict(dict))
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self._vars_cache = data.get('vars_cache', defaultdict(dict))
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self._extra_vars = data.get('extra_vars', dict())
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self._host_vars_files = data.get('host_vars_files', defaultdict(dict))
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self._group_vars_files = data.get('group_vars_files', defaultdict(dict))
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self._omit_token = data.get('omit_token', '__omit_place_holder__%s' % sha1(os.urandom(64)).hexdigest())
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self._inventory = data.get('inventory', None)
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self._options_vars = data.get('options_vars', dict())
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@property
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def extra_vars(self):
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''' ensures a clean copy of the extra_vars are made '''
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return self._extra_vars.copy()
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@extra_vars.setter
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def extra_vars(self, value):
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''' ensures a clean copy of the extra_vars are used to set the value '''
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assert isinstance(value, MutableMapping), "the type of 'value' for extra_vars should be a MutableMapping, but is a %s" % type(value)
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self._extra_vars = value.copy()
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def set_inventory(self, inventory):
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self._inventory = inventory
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@property
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def options_vars(self):
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''' ensures a clean copy of the options_vars are made '''
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return self._options_vars.copy()
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@options_vars.setter
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def options_vars(self, value):
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''' ensures a clean copy of the options_vars are used to set the value '''
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assert isinstance(value, dict), "the type of 'value' for options_vars should be a dict, but is a %s" % type(value)
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self._options_vars = value.copy()
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def _preprocess_vars(self, a):
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'''
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Ensures that vars contained in the parameter passed in are
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returned as a list of dictionaries, to ensure for instance
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that vars loaded from a file conform to an expected state.
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'''
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if a is None:
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return None
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elif not isinstance(a, list):
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data = [a]
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else:
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data = a
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for item in data:
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if not isinstance(item, MutableMapping):
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raise AnsibleError("variable files must contain either a dictionary of variables, or a list of dictionaries. Got: %s (%s)" % (a, type(a)))
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return data
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def get_vars(self, play=None, host=None, task=None, include_hostvars=True, include_delegate_to=True, use_cache=True):
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'''
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Returns the variables, with optional "context" given via the parameters
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for the play, host, and task (which could possibly result in different
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sets of variables being returned due to the additional context).
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The order of precedence is:
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- play->roles->get_default_vars (if there is a play context)
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- group_vars_files[host] (if there is a host context)
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- host_vars_files[host] (if there is a host context)
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- host->get_vars (if there is a host context)
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- fact_cache[host] (if there is a host context)
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- play vars (if there is a play context)
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- play vars_files (if there's no host context, ignore
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file names that cannot be templated)
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- task->get_vars (if there is a task context)
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- vars_cache[host] (if there is a host context)
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- extra vars
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'''
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display.debug("in VariableManager get_vars()")
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all_vars = dict()
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magic_variables = self._get_magic_variables(
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play=play,
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host=host,
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task=task,
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include_hostvars=include_hostvars,
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include_delegate_to=include_delegate_to,
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)
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if play:
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# first we compile any vars specified in defaults/main.yml
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# for all roles within the specified play
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for role in play.get_roles():
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all_vars = combine_vars(all_vars, role.get_default_vars())
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basedirs = []
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if task:
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# set basedirs
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if C.PLAYBOOK_VARS_ROOT == 'all': # should be default
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basedirs = task.get_search_path()
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elif C.PLAYBOOK_VARS_ROOT == 'top': # only option pre 2.3
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basedirs = [self._loader.get_basedir()]
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elif C.PLAYBOOK_VARS_ROOT in ('bottom', 'playbook_dir'): # only option in 2.4.0
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basedirs = [task.get_search_path()[0]]
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else:
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raise AnsibleError('Unkown playbook vars logic: %s' % C.PLAYBOOK_VARS_ROOT)
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# if we have a task in this context, and that task has a role, make
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# sure it sees its defaults above any other roles, as we previously
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# (v1) made sure each task had a copy of its roles default vars
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if task._role is not None and (play or task.action == 'include_role'):
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all_vars = combine_vars(all_vars, task._role.get_default_vars(dep_chain=task.get_dep_chain()))
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if host:
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# THE 'all' group and the rest of groups for a host, used below
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all_group = self._inventory.groups.get('all')
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host_groups = sort_groups([g for g in host.get_groups() if g.name not in ['all']])
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def _get_plugin_vars(plugin, path, entities):
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data = {}
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try:
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data = plugin.get_vars(self._loader, path, entities)
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except AttributeError:
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try:
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for entity in entities:
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if isinstance(entity, Host):
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data.update(plugin.get_host_vars(entity.name))
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else:
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data.update(plugin.get_group_vars(entity.name))
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except AttributeError:
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if hasattr(plugin, 'run'):
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raise AnsibleError("Cannot use v1 type vars plugin %s from %s" % (plugin._load_name, plugin._original_path))
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else:
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raise AnsibleError("Invalid vars plugin %s from %s" % (plugin._load_name, plugin._original_path))
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return data
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# internal fuctions that actually do the work
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def _plugins_inventory(entities):
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''' merges all entities by inventory source '''
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data = {}
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for inventory_dir in self._inventory._sources:
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if ',' in inventory_dir: # skip host lists
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continue
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elif not os.path.isdir(inventory_dir): # always pass 'inventory directory'
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inventory_dir = os.path.dirname(inventory_dir)
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for plugin in vars_loader.all():
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data = combine_vars(data, _get_plugin_vars(plugin, inventory_dir, entities))
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return data
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def _plugins_play(entities):
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''' merges all entities adjacent to play '''
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data = {}
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for plugin in vars_loader.all():
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for path in basedirs:
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data = combine_vars(data, _get_plugin_vars(plugin, path, entities))
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return data
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# configurable functions that are sortable via config, rememer to add to _ALLOWED if expanding this list
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def all_inventory():
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return all_group.get_vars()
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def all_plugins_inventory():
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return _plugins_inventory([all_group])
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def all_plugins_play():
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return _plugins_play([all_group])
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def groups_inventory():
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''' gets group vars from inventory '''
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return get_group_vars(host_groups)
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def groups_plugins_inventory():
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''' gets plugin sources from inventory for groups '''
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return _plugins_inventory(host_groups)
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def groups_plugins_play():
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''' gets plugin sources from play for groups '''
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return _plugins_play(host_groups)
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def plugins_by_groups():
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'''
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merges all plugin sources by group,
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This should be used instead, NOT in combination with the other groups_plugins* functions
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'''
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data = {}
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for group in host_groups:
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data[group] = combine_vars(data[group], _plugins_inventory(group))
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data[group] = combine_vars(data[group], _plugins_play(group))
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return data
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# Merge groups as per precedence config, if not implicit localhost
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# only allow to call the functions we want exposed
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if not host.implicit:
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for entry in C.VARIABLE_PRECEDENCE:
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if entry in self._ALLOWED:
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display.debug('Calling %s to load vars for %s' % (entry, host.name))
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all_vars = combine_vars(all_vars, locals()[entry]())
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else:
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display.warning('Ignoring unknown variable precedence entry: %s' % (entry))
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# host vars, from inventory, inventory adjacent and play adjacent via plugins
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all_vars = combine_vars(all_vars, host.get_vars())
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all_vars = combine_vars(all_vars, _plugins_inventory([host]))
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all_vars = combine_vars(all_vars, _plugins_play([host]))
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# finally, the facts caches for this host, if it exists
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try:
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host_facts = wrap_var(self._fact_cache.get(host.name, {}))
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# push facts to main namespace
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all_vars = combine_vars(all_vars, host_facts)
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except KeyError:
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pass
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if play:
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all_vars = combine_vars(all_vars, play.get_vars())
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vars_files = play.get_vars_files()
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try:
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for vars_file_item in vars_files:
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# create a set of temporary vars here, which incorporate the extra
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# and magic vars so we can properly template the vars_files entries
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temp_vars = combine_vars(all_vars, self._extra_vars)
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temp_vars = combine_vars(temp_vars, magic_variables)
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templar = Templar(loader=self._loader, variables=temp_vars)
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# we assume each item in the list is itself a list, as we
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# support "conditional includes" for vars_files, which mimics
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# the with_first_found mechanism.
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vars_file_list = vars_file_item
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if not isinstance(vars_file_list, list):
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vars_file_list = [vars_file_list]
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# now we iterate through the (potential) files, and break out
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# as soon as we read one from the list. If none are found, we
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# raise an error, which is silently ignored at this point.
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try:
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for vars_file in vars_file_list:
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vars_file = templar.template(vars_file)
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try:
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data = preprocess_vars(self._loader.load_from_file(vars_file, unsafe=True))
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if data is not None:
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for item in data:
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all_vars = combine_vars(all_vars, item)
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break
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except AnsibleFileNotFound:
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# we continue on loader failures
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continue
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except AnsibleParserError:
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raise
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else:
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# if include_delegate_to is set to False, we ignore the missing
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# vars file here because we're working on a delegated host
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if include_delegate_to:
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raise AnsibleFileNotFound("vars file %s was not found" % vars_file_item)
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except (UndefinedError, AnsibleUndefinedVariable):
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if host is not None and self._fact_cache.get(host.name, dict()).get('module_setup') and task is not None:
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raise AnsibleUndefinedVariable("an undefined variable was found when attempting to template the vars_files item '%s'"
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% vars_file_item, obj=vars_file_item)
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else:
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# we do not have a full context here, and the missing variable could be because of that
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# so just show a warning and continue
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display.vvv("skipping vars_file '%s' due to an undefined variable" % vars_file_item)
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continue
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display.vvv("Read vars_file '%s'" % vars_file_item)
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except TypeError:
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raise AnsibleParserError("Error while reading vars files - please supply a list of file names. "
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"Got '%s' of type %s" % (vars_files, type(vars_files)))
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# By default, we now merge in all vars from all roles in the play,
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# unless the user has disabled this via a config option
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if not C.DEFAULT_PRIVATE_ROLE_VARS:
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for role in play.get_roles():
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all_vars = combine_vars(all_vars, role.get_vars(include_params=False))
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# next, we merge in the vars from the role, which will specifically
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# follow the role dependency chain, and then we merge in the tasks
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# vars (which will look at parent blocks/task includes)
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if task:
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if task._role:
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all_vars = combine_vars(all_vars, task._role.get_vars(task.get_dep_chain(), include_params=False))
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all_vars = combine_vars(all_vars, task.get_vars())
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# next, we merge in the vars cache (include vars) and nonpersistent
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# facts cache (set_fact/register), in that order
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if host:
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all_vars = combine_vars(all_vars, self._vars_cache.get(host.get_name(), dict()))
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all_vars = combine_vars(all_vars, self._nonpersistent_fact_cache.get(host.name, dict()))
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# next, we merge in role params and task include params
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if task:
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if task._role:
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all_vars = combine_vars(all_vars, task._role.get_role_params(task.get_dep_chain()))
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# special case for include tasks, where the include params
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# may be specified in the vars field for the task, which should
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# have higher precedence than the vars/np facts above
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all_vars = combine_vars(all_vars, task.get_include_params())
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# extra vars
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all_vars = combine_vars(all_vars, self._extra_vars)
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# magic variables
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all_vars = combine_vars(all_vars, magic_variables)
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# special case for the 'environment' magic variable, as someone
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# may have set it as a variable and we don't want to stomp on it
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if task:
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all_vars['environment'] = task.environment
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# if we have a task and we're delegating to another host, figure out the
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# variables for that host now so we don't have to rely on hostvars later
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if task and task.delegate_to is not None and include_delegate_to:
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all_vars['ansible_delegated_vars'] = self._get_delegated_vars(play, task, all_vars)
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# 'vars' magic var
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if task or play:
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# has to be copy, otherwise recursive ref
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all_vars['vars'] = all_vars.copy()
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display.debug("done with get_vars()")
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return all_vars
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def _get_magic_variables(self, play, host, task, include_hostvars, include_delegate_to):
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'''
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Returns a dictionary of so-called "magic" variables in Ansible,
|
|
which are special variables we set internally for use.
|
|
'''
|
|
|
|
variables = {}
|
|
variables['playbook_dir'] = os.path.abspath(self._loader.get_basedir())
|
|
variables['ansible_playbook_python'] = sys.executable
|
|
|
|
if play:
|
|
variables['role_names'] = [r._role_name for r in play.roles]
|
|
|
|
if task:
|
|
if task._role:
|
|
variables['role_name'] = task._role.get_name()
|
|
variables['role_path'] = task._role._role_path
|
|
variables['role_uuid'] = text_type(task._role._uuid)
|
|
|
|
if self._inventory is not None:
|
|
variables['groups'] = self._inventory.get_groups_dict()
|
|
if play:
|
|
templar = Templar(loader=self._loader)
|
|
if templar.is_template(play.hosts):
|
|
pattern = 'all'
|
|
else:
|
|
pattern = play.hosts or 'all'
|
|
# add the list of hosts in the play, as adjusted for limit/filters
|
|
variables['ansible_play_hosts_all'] = [x.name for x in self._inventory.get_hosts(pattern=pattern, ignore_restrictions=True)]
|
|
variables['ansible_play_hosts'] = [x for x in variables['ansible_play_hosts_all'] if x not in play._removed_hosts]
|
|
variables['ansible_play_batch'] = [x.name for x in self._inventory.get_hosts() if x.name not in play._removed_hosts]
|
|
|
|
# DEPRECATED: play_hosts should be deprecated in favor of ansible_play_batch,
|
|
# however this would take work in the templating engine, so for now we'll add both
|
|
variables['play_hosts'] = variables['ansible_play_batch']
|
|
|
|
# the 'omit' value alows params to be left out if the variable they are based on is undefined
|
|
variables['omit'] = self._omit_token
|
|
# Set options vars
|
|
for option, option_value in iteritems(self._options_vars):
|
|
variables[option] = option_value
|
|
|
|
if self._hostvars is not None and include_hostvars:
|
|
variables['hostvars'] = self._hostvars
|
|
|
|
return variables
|
|
|
|
def _get_delegated_vars(self, play, task, existing_variables):
|
|
# we unfortunately need to template the delegate_to field here,
|
|
# as we're fetching vars before post_validate has been called on
|
|
# the task that has been passed in
|
|
vars_copy = existing_variables.copy()
|
|
templar = Templar(loader=self._loader, variables=vars_copy)
|
|
|
|
items = []
|
|
if task.loop is not None:
|
|
if task.loop in lookup_loader:
|
|
try:
|
|
loop_terms = listify_lookup_plugin_terms(terms=task.loop_args, templar=templar,
|
|
loader=self._loader, fail_on_undefined=True, convert_bare=False)
|
|
items = lookup_loader.get(task.loop, loader=self._loader, templar=templar).run(terms=loop_terms, variables=vars_copy)
|
|
except AnsibleUndefinedVariable:
|
|
# This task will be skipped later due to this, so we just setup
|
|
# a dummy array for the later code so it doesn't fail
|
|
items = [None]
|
|
else:
|
|
raise AnsibleError("Unexpected failure in finding the lookup named '%s' in the available lookup plugins" % task.loop)
|
|
else:
|
|
items = [None]
|
|
|
|
delegated_host_vars = dict()
|
|
for item in items:
|
|
# update the variables with the item value for templating, in case we need it
|
|
if item is not None:
|
|
vars_copy['item'] = item
|
|
|
|
templar.set_available_variables(vars_copy)
|
|
delegated_host_name = templar.template(task.delegate_to, fail_on_undefined=False)
|
|
if delegated_host_name is None:
|
|
raise AnsibleError(message="Undefined delegate_to host for task:", obj=task._ds)
|
|
if delegated_host_name in delegated_host_vars:
|
|
# no need to repeat ourselves, as the delegate_to value
|
|
# does not appear to be tied to the loop item variable
|
|
continue
|
|
|
|
# a dictionary of variables to use if we have to create a new host below
|
|
# we set the default port based on the default transport here, to make sure
|
|
# we use the proper default for windows
|
|
new_port = C.DEFAULT_REMOTE_PORT
|
|
if C.DEFAULT_TRANSPORT == 'winrm':
|
|
new_port = 5986
|
|
|
|
new_delegated_host_vars = dict(
|
|
ansible_delegated_host=delegated_host_name,
|
|
ansible_host=delegated_host_name, # not redundant as other sources can change ansible_host
|
|
ansible_port=new_port,
|
|
ansible_user=C.DEFAULT_REMOTE_USER,
|
|
ansible_connection=C.DEFAULT_TRANSPORT,
|
|
)
|
|
|
|
# now try to find the delegated-to host in inventory, or failing that,
|
|
# create a new host on the fly so we can fetch variables for it
|
|
delegated_host = None
|
|
if self._inventory is not None:
|
|
delegated_host = self._inventory.get_host(delegated_host_name)
|
|
# try looking it up based on the address field, and finally
|
|
# fall back to creating a host on the fly to use for the var lookup
|
|
if delegated_host is None:
|
|
if delegated_host_name in C.LOCALHOST:
|
|
delegated_host = self._inventory.localhost
|
|
else:
|
|
for h in self._inventory.get_hosts(ignore_limits=True, ignore_restrictions=True):
|
|
# check if the address matches, or if both the delegated_to host
|
|
# and the current host are in the list of localhost aliases
|
|
if h.address == delegated_host_name:
|
|
delegated_host = h
|
|
break
|
|
else:
|
|
delegated_host = Host(name=delegated_host_name)
|
|
delegated_host.vars = combine_vars(delegated_host.vars, new_delegated_host_vars)
|
|
else:
|
|
delegated_host = Host(name=delegated_host_name)
|
|
delegated_host.vars = combine_vars(delegated_host.vars, new_delegated_host_vars)
|
|
|
|
# now we go fetch the vars for the delegated-to host and save them in our
|
|
# master dictionary of variables to be used later in the TaskExecutor/PlayContext
|
|
delegated_host_vars[delegated_host_name] = self.get_vars(
|
|
play=play,
|
|
host=delegated_host,
|
|
task=task,
|
|
include_delegate_to=False,
|
|
include_hostvars=False,
|
|
)
|
|
return delegated_host_vars
|
|
|
|
def clear_facts(self, hostname):
|
|
'''
|
|
Clears the facts for a host
|
|
'''
|
|
if hostname in self._fact_cache:
|
|
del self._fact_cache[hostname]
|
|
|
|
def set_host_facts(self, host, facts):
|
|
'''
|
|
Sets or updates the given facts for a host in the fact cache.
|
|
'''
|
|
|
|
assert isinstance(facts, dict), "the type of 'facts' to set for host_facts should be a dict but is a %s" % type(facts)
|
|
|
|
if host.name not in self._fact_cache:
|
|
self._fact_cache[host.name] = facts
|
|
else:
|
|
try:
|
|
self._fact_cache.update(host.name, facts)
|
|
except KeyError:
|
|
self._fact_cache[host.name] = facts
|
|
|
|
def set_nonpersistent_facts(self, host, facts):
|
|
'''
|
|
Sets or updates the given facts for a host in the fact cache.
|
|
'''
|
|
|
|
assert isinstance(facts, dict), "the type of 'facts' to set for nonpersistent_facts should be a dict but is a %s" % type(facts)
|
|
|
|
if host.name not in self._nonpersistent_fact_cache:
|
|
self._nonpersistent_fact_cache[host.name] = facts
|
|
else:
|
|
try:
|
|
self._nonpersistent_fact_cache[host.name].update(facts)
|
|
except KeyError:
|
|
self._nonpersistent_fact_cache[host.name] = facts
|
|
|
|
def set_host_variable(self, host, varname, value):
|
|
'''
|
|
Sets a value in the vars_cache for a host.
|
|
'''
|
|
host_name = host.get_name()
|
|
if host_name not in self._vars_cache:
|
|
self._vars_cache[host_name] = dict()
|
|
if varname in self._vars_cache[host_name] and isinstance(self._vars_cache[host_name][varname], MutableMapping) and isinstance(value, MutableMapping):
|
|
self._vars_cache[host_name] = combine_vars(self._vars_cache[host_name], {varname: value})
|
|
else:
|
|
self._vars_cache[host_name][varname] = value
|