Added basic support for OpenStack inventory support. Tested only with RackSpace. Require python-novaclient to work.

inventory/nova.ini

@@ -0,0 +1,26 @@
+# Ansible OpenStack external inventory script
+
+[openstack]
+# API version
+version       = 2
+
+# OpenStack nova username
+username      =
+
+# OpenStack nova api_key
+api_key       =
+
+# OpenStack nova auth_url
+# For use with the new RackSpace API use https://identity.api.rackspacecloud.com/v2.0/
+auth_url      =
+
+# OpenStack nova project_id
+project_id    = None
+
+# TODO: Some other options
+# insecure      =
+# region_name   =
+# endpoint_type =
+# extensions    = 
+# service_type  =
+# service_name  =

inventory/nova.py

@@ -0,0 +1,135 @@
+#!/usr/bin/python
+
+"""
+OpenStack external inventory script
+=================================
+
+Generates inventory that Ansible can understand by making API request to
+OpenStack endpoint using the novaclient library.
+
+NOTE: This script assumes Ansible is being executed where the environment
+variables needed for novaclient have already been set on nova.ini file
+
+For more details, see: https://github.com/openstack/python-novaclient
+
+When run against a specific host, this script returns the following variables:
+    os_os-ext-sts_task_state
+    os_addresses
+    os_links
+    os_image
+    os_os-ext-sts_vm_state
+    os_flavor
+    os_id
+    os_rax-bandwidth_bandwidth
+    os_user_id
+    os_os-dcf_diskconfig
+    os_accessipv4
+    os_accessipv6
+    os_progress
+    os_os-ext-sts_power_state
+    os_metadata
+    os_status
+    os_updated
+    os_hostid
+    os_name
+    os_created
+    os_tenant_id
+    os__info
+    os__loaded
+
+where some item can have nested structure.
+
+"""
+
+# (c) 2012, Marco Vito Moscaritolo <marco@agavee.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/>.
+
+######################################################################
+
+
+import sys
+import re
+import os
+import ConfigParser
+from novaclient import client as nova_client
+
+try:
+    import json
+except:
+    import simplejson as json
+
+###################################################
+# executed with no parameters, return the list of
+# all groups and hosts
+
+
+config = ConfigParser.SafeConfigParser()
+config.read(os.path.dirname(os.path.realpath(__file__)) + '/nova.ini')
+
+client = nova_client.Client(
+    version     = config.get('openstack', 'version'),
+    username    = config.get('openstack', 'username'),
+    api_key     = config.get('openstack', 'api_key'),
+    auth_url    = config.get('openstack', 'auth_url'),
+    project_id  = config.get('openstack', 'project_id')
+)
+
+if len(sys.argv) == 2 and (sys.argv[1] == '--list'):
+    groups = {}
+
+    # Cycle on servers
+    for f in client.servers.list():
+        # Define group (or set to empty string)
+        group = f.metadata['group'] if f.metadata['group'] else ''
+
+        # Create group if not exist
+        if group not in groups:
+            groups[f.metadata['group']] = []
+
+        # Append group to list
+        groups[f.metadata['group']].append(f.accessIPv4)
+
+    # Return server list
+    print json.dumps(groups)
+    sys.exit(0)
+
+#####################################################
+# executed with a hostname as a parameter, return the
+# variables for that host
+
+elif len(sys.argv) == 3 and (sys.argv[1] == '--host'):
+    results = {}
+    for instance in client.servers.list():
+        if instance.accessIPv4 == sys.argv[2]:
+            for key in vars(instance):
+                # Extract value
+                value = getattr(instance, key)
+
+                # Generate sanitized key
+                key = 'os_' + re.sub("[^A-Za-z0-9\-]", "_", key).lower()
+
+                # Att value to instance result (exclude manager class)
+                #TODO: maybe use value.__class__ or similar inside of key_name
+                if key != 'os_manager':
+                    results[key] = value
+
+    print json.dumps(results)
+    sys.exit(0)
+
+else:
+    print "usage: --list  ..OR.. --host <hostname>"
+    sys.exit(1)