New module os_group_info (#57120)

* Added domain_id param to get_group

* Added module os_group_facts based on os_project_facts

* Fix pep8 alarms and version_added to 2.9

* Update lib/ansible/modules/cloud/openstack/os_group_facts.py

Co-Authored-By: Raimund Hook <1150270+StingRayZA@users.noreply.github.com>

* Update lib/ansible/modules/cloud/openstack/os_group_facts.py

Co-Authored-By: Raimund Hook <1150270+StingRayZA@users.noreply.github.com>

* Update lib/ansible/modules/cloud/openstack/os_group_facts.py

Co-Authored-By: Raimund Hook <1150270+StingRayZA@users.noreply.github.com>

* Update lib/ansible/modules/cloud/openstack/os_group_facts.py

Co-Authored-By: Raimund Hook <1150270+StingRayZA@users.noreply.github.com>

* Fixes based on https://github.com/ansible/ansible/pull/57120#issuecomment-511338588

* Update lib/ansible/modules/cloud/openstack/os_group_info.py

Co-Authored-By: Felix Fontein <felix@fontein.de>

* Update lib/ansible/modules/cloud/openstack/os_group_info.py

Co-Authored-By: Felix Fontein <felix@fontein.de>

* Update lib/ansible/modules/cloud/openstack/os_group_info.py

Co-Authored-By: Felix Fontein <felix@fontein.de>

* Removed availability_zone option

* Revert "Removed availability_zone option"

This reverts commit 20155c0b0f5b5b7ec88a9ef4abe1fb56a56ccd87.

* Reverted to the original code to open a new Pull Request

lib/ansible/modules/cloud/openstack/os_group_info.py

@@ -0,0 +1,155 @@
+#!/usr/bin/python
+
+# Copyright (c) 2019, Phillipe Smith <phillipelnx@gmail.com>
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.1',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+
+DOCUMENTATION = '''
+---
+module: os_group_info
+short_description: Retrieve info about one or more OpenStack groups
+extends_documentation_fragment: openstack
+version_added: "2.9"
+author: "Phillipe Smith (@phsmith)"
+description:
+    - Retrieve info about a one or more OpenStack groups.
+requirements:
+    - "python >= 2.7"
+    - "openstacksdk"
+options:
+   name:
+     description:
+        - Name or ID of the group.
+     required: true
+     type: str
+   domain:
+     description:
+        - Name or ID of the domain containing the group if the cloud supports domains
+     type: str
+   filters:
+     description:
+        - A dictionary of meta data to use for further filtering.  Elements of
+          this dictionary may be additional dictionaries.
+     type: dict
+   availability_zone:
+     description:
+       - Ignored. Present for backwards compatibility
+     type: str
+'''
+
+EXAMPLES = '''
+# Gather info about previously created groups
+- os_group_info:
+    cloud: awesomecloud
+  register: openstack_groups
+- debug:
+    var: openstack_groups
+
+# Gather info about a previously created group by name
+- os_group_info:
+    cloud: awesomecloud
+    name: demogroup
+  register: openstack_groups
+- debug:
+    var: openstack_groups
+
+# Gather info about a previously created group in a specific domain
+- os_group_info:
+    cloud: awesomecloud
+    name: demogroup
+    domain: admindomain
+  register: openstack_groups
+- debug:
+    var: openstack_groups
+
+# Gather info about a previously created group in a specific domain with filter
+- os_group_info:
+    cloud: awesomecloud
+    name: demogroup
+    domain: admindomain
+    filters:
+      enabled: False
+  register: openstack_groups
+- debug:
+    var: openstack_groups
+'''
+
+
+RETURN = '''
+openstack_groups:
+    description: Dictionary describing all the matching groups.
+    returned: always, but can be null
+    type: complex
+    contains:
+        name:
+            description: Name given to the group.
+            returned: success
+            type: string
+        description:
+            description: Description of the group.
+            returned: success
+            type: string
+        id:
+            description: Unique UUID.
+            returned: success
+            type: string
+        domain_id:
+            description: Domain ID containing the group (keystone v3 clouds only)
+            returned: success
+            type: bool
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.openstack import openstack_full_argument_spec, openstack_cloud_from_module
+
+
+def main():
+
+    argument_spec = openstack_full_argument_spec(
+        name=dict(required=False, default=None),
+        domain=dict(required=False, default=None),
+        filters=dict(required=False, type='dict', default=None),
+    )
+
+    module = AnsibleModule(argument_spec)
+
+    sdk, opcloud = openstack_cloud_from_module(module)
+    try:
+        name = module.params['name']
+        domain = module.params['domain']
+        filters = module.params['filters']
+
+        if domain:
+            try:
+                # We assume admin is passing domain id
+                dom = opcloud.get_domain(domain)['id']
+                domain = dom
+            except Exception:
+                # If we fail, maybe admin is passing a domain name.
+                # Note that domains have unique names, just like id.
+                dom = opcloud.search_domains(filters={'name': domain})
+                if dom:
+                    domain = dom[0]['id']
+                else:
+                    module.fail_json(msg='Domain name or ID does not exist')
+
+            if not filters:
+                filters = {}
+
+        groups = opcloud.search_groups(name, filters, domain_id=domain)
+        module.exit_json(changed=False, groups=groups)
+
+    except sdk.exceptions.OpenStackCloudException as e:
+        module.fail_json(msg=str(e))
+
+
+if __name__ == '__main__':
+    main()