Add Nagios NDO inventory plugin

contrib/inventory/nagios_ndo.ini

+# Ansible Nagios external inventory script settings
+#
+
+[ndo]
+# NDO database URI
+# Make sure that data is returned as strings and not bytes if using python 3.
+# See http://docs.sqlalchemy.org/en/rel_1_0/core/engines.html
+# for supported databases and URI format.
+# Example for mysqlclient module :
+database_uri=mysql+mysqldb://user:passwd@hostname/ndo?charset=utf8&use_unicode=1

contrib/inventory/nagios_ndo.py

+#!/usr/bin/env python
+
+# (c) 2014, Jonathan Lestrelin <jonathan.lestrelin@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/>.
+
+"""
+Nagios NDO external inventory script.
+========================================
+
+Returns hosts and hostgroups from Nagios NDO.
+
+Configuration is read from `nagios_ndo.ini`.
+"""
+
+import os
+import argparse
+try:
+    import configparser
+except ImportError:
+    import ConfigParser
+    configparser = ConfigParser
+import json
+
+try:
+    from sqlalchemy import text
+    from sqlalchemy.engine import create_engine
+except ImportError:
+    print("Error: SQLAlchemy is needed. Try something like: pip install sqlalchemy")
+    exit(1)
+
+class NagiosNDOInventory(object):
+
+    def read_settings(self):
+        config = configparser.SafeConfigParser()
+        config.read(os.path.dirname(os.path.realpath(__file__)) + '/nagios_ndo.ini')
+        if config.has_option('ndo', 'database_uri'):
+            self.ndo_database_uri = config.get('ndo', 'database_uri')
+
+    def read_cli(self):
+        parser = argparse.ArgumentParser()
+        parser.add_argument('--host', nargs=1)
+        parser.add_argument('--list', action='store_true')
+        self.options = parser.parse_args()
+
+    def get_hosts(self):
+        engine = create_engine(self.ndo_database_uri)
+        connection = engine.connect()
+        select_hosts = text("SELECT display_name \
+                            FROM nagios_hosts")
+        select_hostgroups = text("SELECT alias \
+                                 FROM nagios_hostgroups")
+        select_hostgroup_hosts = text("SELECT h.display_name \
+                                       FROM nagios_hostgroup_members hgm, nagios_hosts h, nagios_hostgroups hg \
+                                       WHERE hgm.hostgroup_id = hg.hostgroup_id \
+                                       AND hgm.host_object_id = h.host_object_id \
+                                       AND hg.alias =:hostgroup_alias")
+
+        hosts = connection.execute(select_hosts)
+        self.result['all']['hosts'] = [host['display_name'] for host in hosts]
+
+        for hostgroup in connection.execute(select_hostgroups):
+            hostgroup_alias = hostgroup['alias']
+            self.result[hostgroup_alias] = {}
+            hosts = connection.execute(select_hostgroup_hosts, hostgroup_alias=hostgroup_alias)
+            self.result[hostgroup_alias]['hosts'] = [host['display_name'] for host in hosts]
+
+    def __init__(self):
+
+        self.defaultgroup = 'group_all'
+        self.ndo_database_uri = None
+        self.options = None
+
+        self.read_settings()
+        self.read_cli()
+
+        self.result = {}
+        self.result['all'] = {}
+        self.result['all']['hosts'] = []
+        self.result['_meta'] = {}
+        self.result['_meta']['hostvars'] = {}
+
+        if self.ndo_database_uri:
+            self.get_hosts()
+            if self.options.host:
+                print(json.dumps({}))
+            elif self.options.list:
+                print(json.dumps(self.result))
+            else:
+                print("usage: --list or --host HOSTNAME")
+                exit(1)
+        else:
+            print("Error: Database configuration is missing. See nagios_ndo.ini.")
+            exit(1)
+
+NagiosNDOInventory()