Add host_aggregate_info module

This module allows operators to get informations on
compute aggregates in a cluster, including availability zone
informations and hosts membership.

Change-Id: I14fa8d6914072bee314efa3753633933b21e9439
Signed-off-by: Bertrand Lanson <bertrand.lanson@infomaniak.com>

plugins/modules/host_aggregate_info.py

@@ -0,0 +1,107 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2025 OpenStack Ansible SIG
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+DOCUMENTATION = r'''
+---
+module: host_aggregate_info
+short_description: Fetch OpenStack host aggregates
+author: OpenStack Ansible SIG
+description:
+  - Fetch OpenStack host aggregates.
+options:
+  name:
+    description:
+      - Name or ID of the aggregate.
+      - Returns only the matching aggregate when set.
+    type: str
+extends_documentation_fragment:
+  - openstack.cloud.openstack
+'''
+
+EXAMPLES = r'''
+- name: Fetch all host aggregates
+  openstack.cloud.host_aggregate_info:
+    cloud: mycloud
+
+- name: Fetch a specific host aggregate by name
+  openstack.cloud.host_aggregate_info:
+    cloud: mycloud
+    name: db_aggregate
+'''
+
+RETURN = r'''
+aggregates:
+  description: List of dictionaries describing host aggregates.
+  returned: always
+  type: list
+  elements: dict
+  contains:
+    availability_zone:
+      description: Availability zone of the aggregate.
+      type: str
+    created_at:
+      description: The date and time when the resource was created.
+      type: str
+    deleted_at:
+      description: The date and time when the resource was deleted.
+      type: str
+    hosts:
+      description: List of hosts belonging to the aggregate.
+      type: list
+      elements: str
+    id:
+      description: The UUID of the aggregate.
+      type: str
+    is_deleted:
+      description: Whether or not the resource is deleted.
+      type: bool
+    metadata:
+      description: Metadata attached to the aggregate.
+      type: dict
+    name:
+      description: Name of the aggregate.
+      type: str
+    updated_at:
+      description: The date and time when the resource was updated.
+      type: str
+    uuid:
+      description: UUID of the aggregate.
+      type: str
+'''
+
+from ansible_collections.openstack.cloud.plugins.module_utils.openstack import OpenStackModule
+
+
+class ComputeHostAggregateInfoModule(OpenStackModule):
+    argument_spec = dict(
+        name=dict(),
+    )
+
+    module_kwargs = dict(
+        supports_check_mode=True
+    )
+
+    def run(self):
+        name = self.params['name']
+
+        if name:
+            aggregate = self.conn.compute.find_aggregate(name)
+            aggregates = [aggregate] if aggregate else []
+        else:
+            aggregates = list(self.conn.compute.aggregates())
+
+        self.exit_json(changed=False,
+                       aggregates=[a.to_dict(computed=False)
+                                   for a in aggregates])
+
+
+def main():
+    module = ComputeHostAggregateInfoModule()
+    module()
+
+
+if __name__ == '__main__':
+    main()