Add ovirt_clusters and ovirt_clusters_facts modules (#3138)

* Add ovirt_clusters and ovirt_clusters_facts modules

* Add return values examples

* Improve documentation

* Added all cluster parameters

lib/ansible/modules/extras/cloud/ovirt/ovirt_clusters_facts.py

@@ -0,0 +1,99 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2016 Red Hat, Inc.
+#
+# 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 traceback
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.ovirt import (
+    check_sdk,
+    create_connection,
+    get_dict_of_struct,
+    ovirt_full_argument_spec,
+)
+
+
+DOCUMENTATION = '''
+---
+module: ovirt_clusters_facts
+short_description: Retrieve facts about one or more oVirt clusters
+author: "Ondra Machacek (@machacekondra)"
+version_added: "2.3"
+description:
+    - "Retrieve facts about one or more oVirt clusters."
+notes:
+    - "This module creates a new top-level C(ovirt_clusters) fact, which
+       contains a list of clusters."
+options:
+    pattern:
+      description:
+        - "Search term which is accepted by oVirt search backend."
+        - "For example to search cluster X from datacenter Y use following pattern:
+           name=X and datacenter=Y"
+extends_documentation_fragment: ovirt
+'''
+
+EXAMPLES = '''
+# Examples don't contain auth parameter for simplicity,
+# look at ovirt_auth module to see how to reuse authentication:
+
+# Gather facts about all clusters which names start with C<production>:
+- ovirt_clusters_facts:
+    pattern: name=production*
+- debug:
+    var: ovirt_clusters
+'''
+
+RETURN = '''
+ovirt_clusters:
+    description: "List of dictionaries describing the clusters. Cluster attribues are mapped to dictionary keys,
+                  all clusters attributes can be found at following url: https://ovirt.example.com/ovirt-engine/api/model#types/cluster."
+    returned: On success.
+    type: list
+'''
+
+
+def main():
+    argument_spec = ovirt_full_argument_spec(
+        pattern=dict(default='', required=False),
+    )
+    module = AnsibleModule(argument_spec)
+    check_sdk(module)
+
+    try:
+        connection = create_connection(module.params.pop('auth'))
+        clusters_service = connection.system_service().clusters_service()
+        clusters = clusters_service.list(search=module.params['pattern'])
+        module.exit_json(
+            changed=False,
+            ansible_facts=dict(
+                ovirt_clusters=[
+                    get_dict_of_struct(c) for c in clusters
+                ],
+            ),
+        )
+    except Exception as e:
+        module.fail_json(msg=str(e), exception=traceback.format_exc())
+    finally:
+        connection.close(logout=False)
+
+
+if __name__ == '__main__':
+    main()