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196 lines
6.1 KiB
Python
Executable file
196 lines
6.1 KiB
Python
Executable file
#!/bin/env python
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"""
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Spacewalk 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 dependent upon the spacealk-reports package being installed
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on the same machine. It is basically a CSV-to-JSON converter from the
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output of "spacewalk-report system-groups-systems|inventory".
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Tested with Ansible 1.1
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"""
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#
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# Author:: Jon Miller <jonEbird@gmail.com>
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# Copyright:: Copyright (c) 2013, Jon Miller
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#
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# Extended for support of multiple organizations by
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# Bernhard Lichtinger <bernhard.lichtinger@lrz.de> 2014
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#
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# This program 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 2 of the License, or (at
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# your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# 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 this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import sys
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import os
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import time
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from optparse import OptionParser
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import subprocess
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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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base_dir = os.path.dirname(os.path.realpath(__file__))
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SW_REPORT = '/usr/bin/spacewalk-report'
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CACHE_DIR = os.path.join(base_dir, ".spacewalk_reports")
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CACHE_AGE = 300 # 5min
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# Sanity check
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if not os.path.exists(SW_REPORT):
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print >> sys.stderr, 'Error: %s is required for operation.' % (SW_REPORT)
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sys.exit(1)
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# Pre-startup work
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if not os.path.exists(CACHE_DIR):
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os.mkdir(CACHE_DIR)
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os.chmod(CACHE_DIR, 2775)
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# Helper functions
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#------------------------------
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def spacewalk_report(name):
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"""Yield a dictionary form of each CSV output produced by the specified
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spacewalk-report
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"""
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cache_filename = os.path.join(CACHE_DIR, name)
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if not os.path.exists(cache_filename) or \
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(time.time() - os.stat(cache_filename).st_mtime) > CACHE_AGE:
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# Update the cache
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fh = open(cache_filename, 'w')
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p = subprocess.Popen([SW_REPORT, name], stdout=fh)
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p.wait()
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fh.close()
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lines = open(cache_filename, 'r').readlines()
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keys = lines[0].strip().split(',')
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for line in lines[1:]:
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values = line.strip().split(',')
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if len(keys) == len(values):
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yield dict(zip(keys, values))
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# Options
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#------------------------------
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parser = OptionParser(usage="%prog [options] --list | --host <machine>")
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parser.add_option('--list', default=False, dest="list", action="store_true",
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help="Produce a JSON consumable grouping of servers for Ansible")
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parser.add_option('--host', default=None, dest="host",
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help="Generate additional host specific details for given host for Ansible")
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parser.add_option('-H', '--human', dest="human",
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default=False, action="store_true",
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help="Produce a friendlier version of either server list or host detail")
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parser.add_option('-o', '--org', default=None, dest="org_number",
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help="Limit to spacewalk organization number")
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parser.add_option('-p', default=False, dest="prefix_org_name", action="store_true",
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help="Prefix the group name with the organization number")
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(options, args) = parser.parse_args()
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# Generate dictionary for mapping group_id to org_id
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#------------------------------
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org_groups = {}
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try:
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for group in spacewalk_report('system-groups'):
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org_groups[group['group_id']] = group['org_id']
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except (OSError), e:
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print >> sys.stderr, 'Problem executing the command "%s system-groups": %s' % \
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(SW_REPORT, str(e))
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sys.exit(2)
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# List out the known server from Spacewalk
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#------------------------------
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if options.list:
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groups = {}
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try:
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for system in spacewalk_report('system-groups-systems'):
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# first get org_id of system
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org_id = org_groups[ system['group_id'] ]
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# shall we add the org_id as prefix to the group name:
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if options.prefix_org_name:
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prefix = org_id + "-"
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group_name = prefix + system['group_name']
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else:
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group_name = system['group_name']
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# if we are limited to one organization:
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if options.org_number:
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if org_id == options.org_number:
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if group_name not in groups:
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groups[group_name] = set()
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groups[group_name].add(system['server_name'])
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# or we list all groups and systems:
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else:
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if group_name not in groups:
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groups[group_name] = set()
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groups[group_name].add(system['server_name'])
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except (OSError), e:
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print >> sys.stderr, 'Problem executing the command "%s system-groups-systems": %s' % \
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(SW_REPORT, str(e))
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sys.exit(2)
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if options.human:
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for group, systems in groups.iteritems():
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print '[%s]\n%s\n' % (group, '\n'.join(systems))
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else:
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print json.dumps(dict([ (k, list(s)) for k, s in groups.iteritems() ]))
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sys.exit(0)
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# Return a details information concerning the spacewalk server
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#------------------------------
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elif options.host:
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host_details = {}
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try:
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for system in spacewalk_report('inventory'):
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if system['hostname'] == options.host:
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host_details = system
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break
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except (OSError), e:
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print >> sys.stderr, 'Problem executing the command "%s inventory": %s' % \
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(SW_REPORT, str(e))
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sys.exit(2)
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if options.human:
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print 'Host: %s' % options.host
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for k, v in host_details.iteritems():
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print ' %s: %s' % (k, '\n '.join(v.split(';')))
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else:
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print json.dumps(host_details)
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sys.exit(0)
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else:
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parser.print_help()
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sys.exit(1)
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