173 lines
6.3 KiB
Python
173 lines
6.3 KiB
Python
# Copyright 2016 RedHat, inc
|
|
#
|
|
# This file is part of Ansible
|
|
#
|
|
# Ansible is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# Ansible is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#############################################
|
|
from __future__ import (absolute_import, division, print_function)
|
|
__metaclass__ = type
|
|
|
|
import re
|
|
|
|
from ansible import constants as C
|
|
from ansible.inventory.host import Host
|
|
from ansible.inventory.group import Group
|
|
from ansible.inventory.expand_hosts import detect_range
|
|
from ansible.inventory.expand_hosts import expand_hostname_range
|
|
from ansible.parsing.utils.addresses import parse_address
|
|
from ansible.compat.six import string_types
|
|
|
|
class InventoryParser(object):
|
|
"""
|
|
Takes an INI-format inventory file and builds a list of groups and subgroups
|
|
with their associated hosts and variable settings.
|
|
"""
|
|
|
|
def __init__(self, loader, groups, filename=C.DEFAULT_HOST_LIST):
|
|
self._loader = loader
|
|
self.filename = filename
|
|
|
|
# Start with an empty host list and whatever groups we're passed in
|
|
# (which should include the default 'all' and 'ungrouped' groups).
|
|
|
|
self.hosts = {}
|
|
self.patterns = {}
|
|
self.groups = groups
|
|
|
|
# Read in the hosts, groups, and variables defined in the
|
|
# inventory file.
|
|
data = loader.load_from_file(filename)
|
|
|
|
self._parse(data)
|
|
|
|
def _parse(self, data):
|
|
'''
|
|
Populates self.groups from the given array of lines. Raises an error on
|
|
any parse failure.
|
|
'''
|
|
|
|
self._compile_patterns()
|
|
|
|
# We expect top level keys to correspond to groups, iterate over them
|
|
# to get host, vars and subgroups (which we iterate over recursivelly)
|
|
for group_name in data.keys():
|
|
self._parse_groups(group_name, data[group_name])
|
|
|
|
# Finally, add all top-level groups as children of 'all'.
|
|
# We exclude ungrouped here because it was already added as a child of
|
|
# 'all' at the time it was created.
|
|
for group in self.groups.values():
|
|
if group.depth == 0 and group.name not in ('all', 'ungrouped'):
|
|
self.groups['all'].add_child_group(Group(group_name))
|
|
|
|
def _parse_groups(self, group, group_data):
|
|
|
|
if group not in self.groups:
|
|
self.groups[group] = Group(name=group)
|
|
|
|
if isinstance(group_data, dict):
|
|
#make sure they are dicts
|
|
for section in ['vars', 'children', 'hosts']:
|
|
if section in group_data and isinstance(group_data[section], string_types):
|
|
group_data[section] = { group_data[section]: None}
|
|
|
|
if 'vars' in group_data:
|
|
for var in group_data['vars']:
|
|
if var != 'ansible_group_priority':
|
|
self.groups[group].set_variable(var, group_data['vars'][var])
|
|
else:
|
|
self.groups[group].set_priority(group_data['vars'][var])
|
|
|
|
if 'children' in group_data:
|
|
for subgroup in group_data['children']:
|
|
self._parse_groups(subgroup, group_data['children'][subgroup])
|
|
self.groups[group].add_child_group(self.groups[subgroup])
|
|
|
|
if 'hosts' in group_data:
|
|
for host_pattern in group_data['hosts']:
|
|
hosts = self._parse_host(host_pattern, group_data['hosts'][host_pattern])
|
|
for h in hosts:
|
|
self.groups[group].add_host(h)
|
|
|
|
|
|
def _parse_host(self, host_pattern, host_data):
|
|
'''
|
|
Each host key can be a pattern, try to process it and add variables as needed
|
|
'''
|
|
(hostnames, port) = self._expand_hostpattern(host_pattern)
|
|
hosts = self._Hosts(hostnames, port)
|
|
|
|
if isinstance(host_data, dict):
|
|
for k in host_data:
|
|
for h in hosts:
|
|
h.set_variable(k, host_data[k])
|
|
if k in ['ansible_host', 'ansible_ssh_host']:
|
|
h.address = host_data[k]
|
|
return hosts
|
|
|
|
def _expand_hostpattern(self, hostpattern):
|
|
'''
|
|
Takes a single host pattern and returns a list of hostnames and an
|
|
optional port number that applies to all of them.
|
|
'''
|
|
|
|
# Can the given hostpattern be parsed as a host with an optional port
|
|
# specification?
|
|
|
|
try:
|
|
(pattern, port) = parse_address(hostpattern, allow_ranges=True)
|
|
except:
|
|
# not a recognizable host pattern
|
|
pattern = hostpattern
|
|
port = None
|
|
|
|
# Once we have separated the pattern, we expand it into list of one or
|
|
# more hostnames, depending on whether it contains any [x:y] ranges.
|
|
|
|
if detect_range(pattern):
|
|
hostnames = expand_hostname_range(pattern)
|
|
else:
|
|
hostnames = [pattern]
|
|
|
|
return (hostnames, port)
|
|
|
|
def _Hosts(self, hostnames, port):
|
|
'''
|
|
Takes a list of hostnames and a port (which may be None) and returns a
|
|
list of Hosts (without recreating anything in self.hosts).
|
|
'''
|
|
|
|
hosts = []
|
|
|
|
# Note that we decide whether or not to create a Host based solely on
|
|
# the (non-)existence of its hostname in self.hosts. This means that one
|
|
# cannot add both "foo:22" and "foo:23" to the inventory.
|
|
|
|
for hn in hostnames:
|
|
if hn not in self.hosts:
|
|
self.hosts[hn] = Host(name=hn, port=port)
|
|
hosts.append(self.hosts[hn])
|
|
|
|
return hosts
|
|
|
|
def get_host_variables(self, host):
|
|
return {}
|
|
|
|
def _compile_patterns(self):
|
|
'''
|
|
Compiles the regular expressions required to parse the inventory and stores them in self.patterns.
|
|
'''
|
|
self.patterns['groupname'] = re.compile( r'''^[A-Za-z_][A-Za-z0-9_]*$''')
|