mirror of
https://github.com/ansible-collections/community.general.git
synced 2024-09-14 20:13:21 +02:00
9278591758
add cobbler api authentication options: username and password, which can be provided if authentication is enabled or cobbler api is behind a proxy that needs authentication.
284 lines
10 KiB
Python
Executable file
284 lines
10 KiB
Python
Executable file
#!/usr/bin/env python
|
|
|
|
"""
|
|
Cobbler external inventory script
|
|
=================================
|
|
|
|
Ansible has a feature where instead of reading from /etc/ansible/hosts
|
|
as a text file, it can query external programs to obtain the list
|
|
of hosts, groups the hosts are in, and even variables to assign to each host.
|
|
|
|
To use this, copy this file over /etc/ansible/hosts and chmod +x the file.
|
|
This, more or less, allows you to keep one central database containing
|
|
info about all of your managed instances.
|
|
|
|
This script is an example of sourcing that data from Cobbler
|
|
(http://cobbler.github.com). With cobbler each --mgmt-class in cobbler
|
|
will correspond to a group in Ansible, and --ks-meta variables will be
|
|
passed down for use in templates or even in argument lines.
|
|
|
|
NOTE: The cobbler system names will not be used. Make sure a
|
|
cobbler --dns-name is set for each cobbler system. If a system
|
|
appears with two DNS names we do not add it twice because we don't want
|
|
ansible talking to it twice. The first one found will be used. If no
|
|
--dns-name is set the system will NOT be visible to ansible. We do
|
|
not add cobbler system names because there is no requirement in cobbler
|
|
that those correspond to addresses.
|
|
|
|
See http://ansible.github.com/api.html for more info
|
|
|
|
Tested with Cobbler 2.0.11.
|
|
|
|
Changelog:
|
|
- 2015-06-21 dmccue: Modified to support run-once _meta retrieval, results in
|
|
higher performance at ansible startup. Groups are determined by owner rather than
|
|
default mgmt_classes. DNS name determined from hostname. cobbler values are written
|
|
to a 'cobbler' fact namespace
|
|
|
|
- 2013-09-01 pgehres: Refactored implementation to make use of caching and to
|
|
limit the number of connections to external cobbler server for performance.
|
|
Added use of cobbler.ini file to configure settings. Tested with Cobbler 2.4.0
|
|
|
|
"""
|
|
|
|
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
|
|
#
|
|
# 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/>.
|
|
|
|
######################################################################
|
|
|
|
import argparse
|
|
import ConfigParser
|
|
import os
|
|
import re
|
|
from time import time
|
|
import xmlrpclib
|
|
|
|
try:
|
|
import json
|
|
except ImportError:
|
|
import simplejson as json
|
|
|
|
from six import iteritems
|
|
|
|
# NOTE -- this file assumes Ansible is being accessed FROM the cobbler
|
|
# server, so it does not attempt to login with a username and password.
|
|
# this will be addressed in a future version of this script.
|
|
|
|
orderby_keyname = 'owners' # alternatively 'mgmt_classes'
|
|
|
|
|
|
class CobblerInventory(object):
|
|
|
|
def __init__(self):
|
|
|
|
""" Main execution path """
|
|
self.conn = None
|
|
|
|
self.inventory = dict() # A list of groups and the hosts in that group
|
|
self.cache = dict() # Details about hosts in the inventory
|
|
|
|
# Read settings and parse CLI arguments
|
|
self.read_settings()
|
|
self.parse_cli_args()
|
|
|
|
# Cache
|
|
if self.args.refresh_cache:
|
|
self.update_cache()
|
|
elif not self.is_cache_valid():
|
|
self.update_cache()
|
|
else:
|
|
self.load_inventory_from_cache()
|
|
self.load_cache_from_cache()
|
|
|
|
data_to_print = ""
|
|
|
|
# Data to print
|
|
if self.args.host:
|
|
data_to_print += self.get_host_info()
|
|
else:
|
|
self.inventory['_meta'] = { 'hostvars': {} }
|
|
for hostname in self.cache:
|
|
self.inventory['_meta']['hostvars'][hostname] = {'cobbler': self.cache[hostname] }
|
|
data_to_print += self.json_format_dict(self.inventory, True)
|
|
|
|
print(data_to_print)
|
|
|
|
def _connect(self):
|
|
if not self.conn:
|
|
self.conn = xmlrpclib.Server(self.cobbler_host, allow_none=True)
|
|
self.token = None
|
|
if self.cobbler_username is not None:
|
|
self.token = self.conn.login(self.cobbler_username, self.cobbler_password)
|
|
|
|
def is_cache_valid(self):
|
|
""" Determines if the cache files have expired, or if it is still valid """
|
|
|
|
if os.path.isfile(self.cache_path_cache):
|
|
mod_time = os.path.getmtime(self.cache_path_cache)
|
|
current_time = time()
|
|
if (mod_time + self.cache_max_age) > current_time:
|
|
if os.path.isfile(self.cache_path_inventory):
|
|
return True
|
|
|
|
return False
|
|
|
|
def read_settings(self):
|
|
""" Reads the settings from the cobbler.ini file """
|
|
|
|
config = ConfigParser.SafeConfigParser()
|
|
config.read(os.path.dirname(os.path.realpath(__file__)) + '/cobbler.ini')
|
|
|
|
self.cobbler_host = config.get('cobbler', 'host')
|
|
self.cobbler_username = None
|
|
self.cobbler_password = None
|
|
if config.has_option('cobbler', 'username'):
|
|
self.cobbler_username = config.get('cobbler', 'username')
|
|
if config.has_option('cobbler', 'password'):
|
|
self.cobbler_password = config.get('cobbler', 'password')
|
|
|
|
# Cache related
|
|
cache_path = config.get('cobbler', 'cache_path')
|
|
self.cache_path_cache = cache_path + "/ansible-cobbler.cache"
|
|
self.cache_path_inventory = cache_path + "/ansible-cobbler.index"
|
|
self.cache_max_age = config.getint('cobbler', 'cache_max_age')
|
|
|
|
def parse_cli_args(self):
|
|
""" Command line argument processing """
|
|
|
|
parser = argparse.ArgumentParser(description='Produce an Ansible Inventory file based on Cobbler')
|
|
parser.add_argument('--list', action='store_true', default=True, help='List instances (default: True)')
|
|
parser.add_argument('--host', action='store', help='Get all the variables about a specific instance')
|
|
parser.add_argument('--refresh-cache', action='store_true', default=False,
|
|
help='Force refresh of cache by making API requests to cobbler (default: False - use cache files)')
|
|
self.args = parser.parse_args()
|
|
|
|
def update_cache(self):
|
|
""" Make calls to cobbler and save the output in a cache """
|
|
|
|
self._connect()
|
|
self.groups = dict()
|
|
self.hosts = dict()
|
|
if self.token is not None:
|
|
data = self.conn.get_systems(self.token)
|
|
else:
|
|
data = self.conn.get_systems()
|
|
|
|
for host in data:
|
|
# Get the FQDN for the host and add it to the right groups
|
|
dns_name = host['hostname'] #None
|
|
ksmeta = None
|
|
interfaces = host['interfaces']
|
|
# hostname is often empty for non-static IP hosts
|
|
if dns_name == '':
|
|
for (iname, ivalue) in iteritems(interfaces):
|
|
if ivalue['management'] or not ivalue['static']:
|
|
this_dns_name = ivalue.get('dns_name', None)
|
|
if this_dns_name is not None and this_dns_name is not "":
|
|
dns_name = this_dns_name
|
|
|
|
if dns_name == '':
|
|
continue
|
|
|
|
status = host['status']
|
|
profile = host['profile']
|
|
classes = host[orderby_keyname]
|
|
|
|
if status not in self.inventory:
|
|
self.inventory[status] = []
|
|
self.inventory[status].append(dns_name)
|
|
|
|
if profile not in self.inventory:
|
|
self.inventory[profile] = []
|
|
self.inventory[profile].append(dns_name)
|
|
|
|
for cls in classes:
|
|
if cls not in self.inventory:
|
|
self.inventory[cls] = []
|
|
self.inventory[cls].append(dns_name)
|
|
|
|
# Since we already have all of the data for the host, update the host details as well
|
|
|
|
# The old way was ksmeta only -- provide backwards compatibility
|
|
|
|
self.cache[dns_name] = host
|
|
if "ks_meta" in host:
|
|
for key, value in iteritems(host["ks_meta"]):
|
|
self.cache[dns_name][key] = value
|
|
|
|
self.write_to_cache(self.cache, self.cache_path_cache)
|
|
self.write_to_cache(self.inventory, self.cache_path_inventory)
|
|
|
|
def get_host_info(self):
|
|
""" Get variables about a specific host """
|
|
|
|
if not self.cache or len(self.cache) == 0:
|
|
# Need to load index from cache
|
|
self.load_cache_from_cache()
|
|
|
|
if not self.args.host in self.cache:
|
|
# try updating the cache
|
|
self.update_cache()
|
|
|
|
if not self.args.host in self.cache:
|
|
# host might not exist anymore
|
|
return self.json_format_dict({}, True)
|
|
|
|
return self.json_format_dict(self.cache[self.args.host], True)
|
|
|
|
def push(self, my_dict, key, element):
|
|
""" Pushed an element onto an array that may not have been defined in the dict """
|
|
|
|
if key in my_dict:
|
|
my_dict[key].append(element)
|
|
else:
|
|
my_dict[key] = [element]
|
|
|
|
def load_inventory_from_cache(self):
|
|
""" Reads the index from the cache file sets self.index """
|
|
|
|
cache = open(self.cache_path_inventory, 'r')
|
|
json_inventory = cache.read()
|
|
self.inventory = json.loads(json_inventory)
|
|
|
|
def load_cache_from_cache(self):
|
|
""" Reads the cache from the cache file sets self.cache """
|
|
|
|
cache = open(self.cache_path_cache, 'r')
|
|
json_cache = cache.read()
|
|
self.cache = json.loads(json_cache)
|
|
|
|
def write_to_cache(self, data, filename):
|
|
""" Writes data in JSON format to a file """
|
|
json_data = self.json_format_dict(data, True)
|
|
cache = open(filename, 'w')
|
|
cache.write(json_data)
|
|
cache.close()
|
|
|
|
def to_safe(self, word):
|
|
""" Converts 'bad' characters in a string to underscores so they can be used as Ansible groups """
|
|
|
|
return re.sub("[^A-Za-z0-9\-]", "_", word)
|
|
|
|
def json_format_dict(self, data, pretty=False):
|
|
""" Converts a dict to a JSON object and dumps it as a formatted string """
|
|
|
|
if pretty:
|
|
return json.dumps(data, sort_keys=True, indent=2)
|
|
else:
|
|
return json.dumps(data)
|
|
|
|
CobblerInventory()
|