1#!/usr/bin/env python
2
3# (c) 2014, Jonathan Lestrelin <jonathan.lestrelin@gmail.com>
4#
5# This file is part of Ansible,
6#
7# Ansible is free software: you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation, either version 3 of the License, or
10# (at your option) any later version.
11#
12# Ansible is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
19
20"""
21Nagios NDO external inventory script.
22========================================
23
24Returns hosts and hostgroups from Nagios NDO.
25
26Configuration is read from `nagios_ndo.ini`.
27"""
28
29import os
30import argparse
31import sys
32from ansible.module_utils.six.moves import configparser
33import json
34
35try:
36    from sqlalchemy import text
37    from sqlalchemy.engine import create_engine
38except ImportError:
39    sys.exit("Error: SQLAlchemy is needed. Try something like: pip install sqlalchemy")
40
41
42class NagiosNDOInventory(object):
43
44    def read_settings(self):
45        config = configparser.SafeConfigParser()
46        config.read(os.path.dirname(os.path.realpath(__file__)) + '/nagios_ndo.ini')
47        if config.has_option('ndo', 'database_uri'):
48            self.ndo_database_uri = config.get('ndo', 'database_uri')
49
50    def read_cli(self):
51        parser = argparse.ArgumentParser()
52        parser.add_argument('--host', nargs=1)
53        parser.add_argument('--list', action='store_true')
54        self.options = parser.parse_args()
55
56    def get_hosts(self):
57        engine = create_engine(self.ndo_database_uri)
58        connection = engine.connect()
59        select_hosts = text("SELECT display_name \
60                            FROM nagios_hosts")
61        select_hostgroups = text("SELECT alias \
62                                 FROM nagios_hostgroups")
63        select_hostgroup_hosts = text("SELECT h.display_name \
64                                       FROM nagios_hostgroup_members hgm, nagios_hosts h, nagios_hostgroups hg \
65                                       WHERE hgm.hostgroup_id = hg.hostgroup_id \
66                                       AND hgm.host_object_id = h.host_object_id \
67                                       AND hg.alias =:hostgroup_alias")
68
69        hosts = connection.execute(select_hosts)
70        self.result['all']['hosts'] = [host['display_name'] for host in hosts]
71
72        for hostgroup in connection.execute(select_hostgroups):
73            hostgroup_alias = hostgroup['alias']
74            self.result[hostgroup_alias] = {}
75            hosts = connection.execute(select_hostgroup_hosts, hostgroup_alias=hostgroup_alias)
76            self.result[hostgroup_alias]['hosts'] = [host['display_name'] for host in hosts]
77
78    def __init__(self):
79
80        self.defaultgroup = 'group_all'
81        self.ndo_database_uri = None
82        self.options = None
83
84        self.read_settings()
85        self.read_cli()
86
87        self.result = {}
88        self.result['all'] = {}
89        self.result['all']['hosts'] = []
90        self.result['_meta'] = {}
91        self.result['_meta']['hostvars'] = {}
92
93        if self.ndo_database_uri:
94            self.get_hosts()
95            if self.options.host:
96                print(json.dumps({}))
97            elif self.options.list:
98                print(json.dumps(self.result))
99            else:
100                sys.exit("usage: --list or --host HOSTNAME")
101        else:
102            sys.exit("Error: Database configuration is missing. See nagios_ndo.ini.")
103
104
105NagiosNDOInventory()
106