#!/bin/env python """ Spacewalk 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 dependent upon the spacealk-reports package being installed on the same machine. It is basically a CSV-to-JSON converter from the output of "spacewalk-report system-groups-systems|inventory". Tested with Ansible 1.9.2 and spacewalk 2.3 """ # # Author:: Jon Miller # Copyright:: Copyright (c) 2013, Jon Miller # # Extended for support of multiple organizations and # adding the "_meta" dictionary to --list output by # Bernhard Lichtinger 2015 # # This program 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 2 of the License, or (at # your option) any later version. # # This program 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 this program. If not, see . # import sys import os import time from optparse import OptionParser import subprocess import ConfigParser try: import json except: import simplejson as json base_dir = os.path.dirname(os.path.realpath(__file__)) SW_REPORT = '/usr/bin/spacewalk-report' CACHE_DIR = os.path.join(base_dir, ".spacewalk_reports") CACHE_AGE = 300 # 5min INI_FILE = os.path.join(base_dir, "spacewalk.ini") # Sanity check if not os.path.exists(SW_REPORT): print >> sys.stderr, 'Error: %s is required for operation.' % (SW_REPORT) sys.exit(1) # Pre-startup work if not os.path.exists(CACHE_DIR): os.mkdir(CACHE_DIR) os.chmod(CACHE_DIR, 2775) # Helper functions #------------------------------ def spacewalk_report(name): """Yield a dictionary form of each CSV output produced by the specified spacewalk-report """ cache_filename = os.path.join(CACHE_DIR, name) if not os.path.exists(cache_filename) or \ (time.time() - os.stat(cache_filename).st_mtime) > CACHE_AGE: # Update the cache fh = open(cache_filename, 'w') p = subprocess.Popen([SW_REPORT, name], stdout=fh) p.wait() fh.close() lines = open(cache_filename, 'r').readlines() keys = lines[0].strip().split(',') # add 'spacewalk_' prefix to the keys keys = [ 'spacewalk_' + key for key in keys ] for line in lines[1:]: values = line.strip().split(',') if len(keys) == len(values): yield dict(zip(keys, values)) # Options #------------------------------ parser = OptionParser(usage="%prog [options] --list | --host ") parser.add_option('--list', default=False, dest="list", action="store_true", help="Produce a JSON consumable grouping of servers for Ansible") parser.add_option('--host', default=None, dest="host", help="Generate additional host specific details for given host for Ansible") parser.add_option('-H', '--human', dest="human", default=False, action="store_true", help="Produce a friendlier version of either server list or host detail") parser.add_option('-o', '--org', default=None, dest="org_number", help="Limit to spacewalk organization number") parser.add_option('-p', default=False, dest="prefix_org_name", action="store_true", help="Prefix the group name with the organization number") (options, args) = parser.parse_args() # read spacewalk.ini if present #------------------------------ if os.path.exists(INI_FILE): config = ConfigParser.SafeConfigParser() config.read(INI_FILE) if config.has_option('spacewalk' , 'cache_age'): CACHE_AGE = config.get('spacewalk' , 'cache_age') if not options.org_number and config.has_option('spacewalk' , 'org_number'): options.org_number = config.get('spacewalk' , 'org_number') if not options.prefix_org_name and config.has_option('spacewalk' , 'prefix_org_name'): options.prefix_org_name = config.getboolean('spacewalk' , 'prefix_org_name') # Generate dictionary for mapping group_id to org_id #------------------------------ org_groups = {} try: for group in spacewalk_report('system-groups'): org_groups[group['spacewalk_group_id']] = group['spacewalk_org_id'] except (OSError) as e: print >> sys.stderr, 'Problem executing the command "%s system-groups": %s' % \ (SW_REPORT, str(e)) sys.exit(2) # List out the known server from Spacewalk #------------------------------ if options.list: # to build the "_meta"-Group with hostvars first create dictionary for later use host_vars = {} try: for item in spacewalk_report('inventory'): host_vars[ item['spacewalk_profile_name'] ] = dict( ( key, ( value.split(';') if ';' in value else value) ) for key, value in item.items() ) except (OSError) as e: print >> sys.stderr, 'Problem executing the command "%s inventory": %s' % \ (SW_REPORT, str(e)) sys.exit(2) groups = {} meta = { "hostvars" : {} } try: for system in spacewalk_report('system-groups-systems'): # first get org_id of system org_id = org_groups[ system['spacewalk_group_id'] ] # shall we add the org_id as prefix to the group name: if options.prefix_org_name: prefix = org_id + "-" group_name = prefix + system['spacewalk_group_name'] else: group_name = system['spacewalk_group_name'] # if we are limited to one organization: if options.org_number: if org_id == options.org_number: if group_name not in groups: groups[group_name] = set() groups[group_name].add(system['spacewalk_server_name']) if system['spacewalk_server_name'] in host_vars and not system['spacewalk_server_name'] in meta[ "hostvars" ]: meta[ "hostvars" ][ system['spacewalk_server_name'] ] = host_vars[ system['spacewalk_server_name'] ] # or we list all groups and systems: else: if group_name not in groups: groups[group_name] = set() groups[group_name].add(system['spacewalk_server_name']) if system['spacewalk_server_name'] in host_vars and not system['spacewalk_server_name'] in meta[ "hostvars" ]: meta[ "hostvars" ][ system['spacewalk_server_name'] ] = host_vars[ system['spacewalk_server_name'] ] except (OSError) as e: print >> sys.stderr, 'Problem executing the command "%s system-groups-systems": %s' % \ (SW_REPORT, str(e)) sys.exit(2) if options.human: for group, systems in groups.iteritems(): print '[%s]\n%s\n' % (group, '\n'.join(systems)) else: final = dict( [ (k, list(s)) for k, s in groups.iteritems() ] ) final["_meta"] = meta print json.dumps( final ) #print json.dumps(groups) sys.exit(0) # Return a details information concerning the spacewalk server #------------------------------ elif options.host: host_details = {} try: for system in spacewalk_report('inventory'): if system['spacewalk_hostname'] == options.host: host_details = system break except (OSError) as e: print >> sys.stderr, 'Problem executing the command "%s inventory": %s' % \ (SW_REPORT, str(e)) sys.exit(2) if options.human: print 'Host: %s' % options.host for k, v in host_details.iteritems(): print ' %s: %s' % (k, '\n '.join(v.split(';'))) else: print json.dumps( dict( ( key, ( value.split(';') if ';' in value else value) ) for key, value in host_details.items() ) ) sys.exit(0) else: parser.print_help() sys.exit(1)