Cleanup deprecation and set date

changelogs/fragments/1825-ec2_instances.yml

@@ -1,3 +1,4 @@
 minor_changes:
   - ec2_instance - add support for additional ``placement`` options and ``license_specifications`` in run instance spec (https://github.com/ansible-collections/amazon.aws/issues/1824).
-  - ec2_instance - deprecation of ``tenancy`` and ``placement_group`` in favor of ``placement`` attribute  (https://github.com/ansible-collections/amazon.aws/pull/1825).
+deprecated_features:
+  - ec2_instance - deprecation of ``tenancy`` and ``placement_group`` in favor of ``placement`` attribute  (https://github.com/ansible-collections/amazon.aws/pull/1825).

plugins/modules/ec2_instance.py

@@ -258,7 +258,7 @@
   tenancy:
     description:
       - What type of tenancy to allow an instance to use. Default is shared tenancy. Dedicated tenancy will incur additional charges.
-      - This field is deprecated, use I(placement) instead.
+      - This field is deprecated and will be removed in a release after 2025-12-01, use I(placement) instead.
     choices: ['dedicated', 'default']
     type: str
   termination_protection:
@@ -326,7 +326,7 @@
   placement_group:
     description:
       - The placement group that needs to be assigned to the instance.
-      - This field is deprecated, use I(placement) instead.
+      - This field is deprecated and will be removed in a release after 2025-12-01, use I(placement) instead.
     type: str
   placement:
     description:
@@ -2295,6 +2295,20 @@ def main():
             if module.params.get("security_groups"):
                 module.fail_json(msg="Parameter network.interfaces can't be used with security_groups")
 
+    if module.params.get("placement_group"):
+        module.deprecate(
+            "The placement_group parameter has been deprecated, please use placement.group_name instead.",
+            date="2025-12-01",
+            collection_name="amazon.aws",
+        )
+
+    if module.params.get("tenancy"):
+        module.deprecate(
+            "The tenancy parameter has been deprecated, please use placement.tenancy instead.",
+            date="2025-12-01",
+            collection_name="amazon.aws",
+        )
+
     state = module.params.get("state")
 
     retry_decorator = AWSRetry.jittered_backoff(