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135 lines
4.3 KiB
Python
Executable file
135 lines
4.3 KiB
Python
Executable file
#!/usr/bin/python
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"""
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Cobbler external inventory script
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=================================
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Ansible has a feature where instead of reading from /etc/ansible/hosts
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as a text file, it can query external programs to obtain the list
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of hosts, groups the hosts are in, and even variables to assign to each host.
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To use this, copy this file over /etc/ansible/hosts and chmod +x the file.
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This, more or less, allows you to keep one central database containing
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info about all of your managed instances.
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This script is an example of sourcing that data from Cobbler
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(http://cobbler.github.com). With cobbler each --mgmt-class in cobbler
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will correspond to a group in Ansible, and --ks-meta variables will be
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passed down for use in templates or even in argument lines.
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NOTE: The cobbler system names will not be used. Make sure a
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cobbler --dns-name is set for each cobbler system. If a system
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appears with two DNS names we do not add it twice because we don't want
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ansible talking to it twice. The first one found will be used. If no
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--dns-name is set the system will NOT be visible to ansible. We do
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not add cobbler system names because there is no requirement in cobbler
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that those correspond to addresses.
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See http://ansible.github.com/api.html for more info
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Tested with Cobbler 2.0.11.
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"""
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# (c) 2012, 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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import sys
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import xmlrpclib
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import shlex
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try:
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import json
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except:
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import simplejson as json
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# NOTE -- this file assumes Ansible is being accessed FROM the cobbler
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# server, so it does not attempt to login with a username and password.
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# this will be addressed in a future version of this script.
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conn = xmlrpclib.Server("http://127.0.0.1/cobbler_api", allow_none=True)
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###################################################
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# executed with no parameters, return the list of
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# all groups and hosts
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if len(sys.argv) == 2 and (sys.argv[1] == '--list'):
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systems = conn.get_item_names('system')
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groups = { 'ungrouped' : [] }
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for system in systems:
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data = conn.get_blended_data(None, system)
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dns_name = None
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interfaces = data['interfaces']
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for (iname, ivalue) in interfaces.iteritems():
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this_dns_name = ivalue.get('dns_name', None)
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if this_dns_name is not None:
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dns_name = this_dns_name
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if dns_name is None:
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continue
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classes = data['mgmt_classes']
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for cls in classes:
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if cls not in groups:
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groups[cls] = []
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# hostname is not really what we want to insert, really insert the
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# first DNS name but no further DNS names
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groups[cls].append(dns_name)
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# handle hosts without mgmt_classes
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if not classes:
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groups['ungrouped'].append(dns_name)
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print json.dumps(groups)
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sys.exit(0)
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#####################################################
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# executed with a hostname as a parameter, return the
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# variables for that host
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elif len(sys.argv) == 3 and (sys.argv[1] == '--host'):
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# look up the system record for the given DNS name
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result = conn.find_system_by_dns_name(sys.argv[2])
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system = result.get('name', None)
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data = {}
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if system is None:
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print json.dumps({})
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sys.exit(1)
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data = conn.get_system_for_koan(system)
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# return the ksmeta data for that system
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metadata = data['ks_meta']
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tokens = shlex.split(metadata)
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results = {}
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for t in tokens:
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if t.find("=") != -1:
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(k,v) = t.split("=",1)
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results[k]=v
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print json.dumps(results)
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sys.exit(0)
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else:
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print "usage: --list ..OR.. --host <hostname>"
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sys.exit(1)
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