277 lines
9.8 KiB
Python
277 lines
9.8 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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#############################################
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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 re
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import sys
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from ansible import constants as C
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from ansible.errors import AnsibleError
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from ansible.inventory.group import Group
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from ansible.inventory.host import Host
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from ansible.module_utils.six import iteritems
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from ansible.module_utils._text import to_bytes
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from ansible.plugins.cache import FactCache
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from ansible.utils.vars import combine_vars
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from ansible.utils.path import basedir
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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 InventoryData(object):
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"""
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Holds inventory data (host and group objects).
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Using it's methods should guarantee expected relationships and data.
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"""
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def __init__(self):
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# the inventory object holds a list of groups
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self.groups = {}
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self.hosts = {}
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# provides 'groups' magic var, host object has group_names
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self._groups_dict_cache = {}
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# current localhost, implicit or explicit
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self.localhost = None
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self.current_source = None
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# Always create the 'all' and 'ungrouped' groups,
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for group in ('all', 'ungrouped'):
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self.add_group(group)
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self.add_child('all', 'ungrouped')
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# prime cache
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self.cache = FactCache()
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def serialize(self):
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data = dict()
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return data
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def deserialize(self, data):
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pass
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def _create_implicit_localhost(self, pattern):
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if self.localhost:
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new_host = self.localhost
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else:
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new_host = Host(pattern)
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# use 'all' vars but not part of all group
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new_host.vars = self.groups['all'].get_vars()
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new_host.address = "127.0.0.1"
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new_host.implicit = True
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if "ansible_python_interpreter" not in new_host.vars:
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py_interp = sys.executable
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if not py_interp:
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# sys.executable is not set in some cornercases. #13585
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py_interp = '/usr/bin/python'
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display.warning('Unable to determine python interpreter from sys.executable. Using /usr/bin/python default. '
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'You can correct this by setting ansible_python_interpreter for localhost')
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new_host.set_variable("ansible_python_interpreter", py_interp)
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if "ansible_connection" not in new_host.vars:
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new_host.set_variable("ansible_connection", 'local')
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self.localhost = new_host
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return new_host
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def _scan_groups_for_host(self, hostname, localhost=False):
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''' in case something did not update inventory correctly, fallback to group scan '''
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found = None
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for group in self.groups.values():
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for host in group.get_hosts():
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if hostname == host.name:
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found = host
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break
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if found:
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break
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if found:
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display.debug('Found host (%s) in groups but it was missing from main inventory' % hostname)
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return found
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def reconcile_inventory(self):
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''' Ensure inventory basic rules, run after updates '''
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display.debug('Reconcile groups and hosts in inventory.')
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self.current_source = None
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group_names = set()
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# set group vars from group_vars/ files and vars plugins
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for g in self.groups:
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group = self.groups[g]
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group_names.add(group.name)
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host_names = set()
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# get host vars from host_vars/ files and vars plugins
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for host in self.hosts.values():
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host_names.add(host.name)
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mygroups = host.get_groups()
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# ensure hosts are always in 'all'
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if 'all' not in mygroups and not host.implicit:
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self.add_child('all', host.name)
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if self.groups['ungrouped'] in mygroups:
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# clear ungrouped of any incorrectly stored by parser
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if set(mygroups).difference(set([self.groups['all'], self.groups['ungrouped']])):
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host.remove_group(self.groups['ungrouped'])
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elif not host.implicit:
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# add ungrouped hosts to ungrouped, except implicit
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length = len(mygroups)
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if length == 0 or (length == 1 and all in mygroups):
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self.add_child('ungrouped', host.name)
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# special case for implicit hosts
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if host.implicit:
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host.vars = combine_vars(self.groups['all'].get_vars(), host.vars)
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# warn if overloading identifier as both group and host
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for conflict in group_names.intersection(host_names):
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display.warning("Found both group and host with same name: %s" % conflict)
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self._groups_dict_cache = {}
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def get_host(self, hostname):
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''' fetch host object using name
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deal with implicit localhost
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and possible inconsistent inventory '''
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matching_host = self.hosts.get(hostname, None)
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# if host is not in hosts dict
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if matching_host is None:
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# might need to create implicit localhost
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if hostname in C.LOCALHOST:
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matching_host = self._create_implicit_localhost(hostname)
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# might be inconsistent inventory, search groups
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if matching_host is None:
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matching_host = self._scan_groups_for_host(hostname)
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# if found/created update hosts dict
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if matching_host:
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self.hosts[hostname] = matching_host
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return matching_host
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def add_group(self, group):
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''' adds a group to inventory if not there already '''
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if group not in self.groups:
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g = Group(group)
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self.groups[group] = g
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self._groups_dict_cache = {}
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display.debug("Added group %s to inventory" % group)
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else:
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display.debug("group %s already in inventory" % group)
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def add_host(self, host, group=None, port=None):
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''' adds a host to inventory and possibly a group if not there already '''
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g = None
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if group:
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if group in self.groups:
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g = self.groups[group]
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else:
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raise AnsibleError("Could not find group %s in inventory" % group)
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if host not in self.hosts:
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h = Host(host, port)
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self.hosts[host] = h
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if self.current_source: # set to 'first source' in which host was encountered
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self.set_variable(host, 'inventory_file', os.path.basename(self.current_source))
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self.set_variable(host, 'inventory_dir', basedir(self.current_source))
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else:
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self.set_variable(host, 'inventory_file', None)
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self.set_variable(host, 'inventory_dir', None)
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display.debug("Added host %s to inventory" % (host))
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# set default localhost from inventory to avoid creating an implicit one. Last localhost defined 'wins'.
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if host in C.LOCALHOST:
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if self.localhost is None:
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self.localhost = self.hosts[host]
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display.vvvv("Set default localhost to %s" % h)
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else:
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display.warning("A duplicate localhost-like entry was found (%s). First found localhost was %s" % (h, self.localhost.name))
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else:
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h = self.hosts[host]
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if g and host not in g.get_hosts():
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g.add_host(h)
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self._groups_dict_cache = {}
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display.debug("Added host %s to group %s" % (host, group))
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def set_variable(self, entity, varname, value):
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''' sets a varible for an inventory object '''
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if entity in self.groups:
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inv_object = self.groups[entity]
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elif entity in self.hosts:
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inv_object = self.hosts[entity]
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else:
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raise AnsibleError("Could not identify group or host named %s" % entity)
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inv_object.set_variable(varname, value)
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display.debug('set %s for %s' % (varname, entity))
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def add_child(self, group, child):
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''' Add host or group to group '''
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if group in self.groups:
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g = self.groups[group]
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if child in self.groups:
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g.add_child_group(self.groups[child])
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elif child in self.hosts:
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g.add_host(self.hosts[child])
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else:
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raise AnsibleError("%s is not a known host nor group" % child)
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self._groups_dict_cache = {}
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display.debug('Group %s now contains %s' % (group, child))
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else:
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raise AnsibleError("%s is not a known group" % group)
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def get_groups_dict(self):
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"""
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We merge a 'magic' var 'groups' with group name keys and hostname list values into every host variable set. Cache for speed.
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"""
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if not self._groups_dict_cache:
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for (group_name, group) in iteritems(self.groups):
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self._groups_dict_cache[group_name] = [h.name for h in group.get_hosts()]
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return self._groups_dict_cache
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