Allow ignoring missing containers in service-stop

The kolla docker/podman workers already have support for ignoring when
containers are missing. This patch just exposes that to the CLI with the
flag ``--ignore-missing``.

Change-Id: Ie74ea3ea66380063cf67f2e0edb2a0e160d89cd7

ansible/roles/service-stop/tasks/main.yml

@@ -7,6 +7,7 @@
     action: "stop_container"
     common_options: "{{ docker_common_options }}"
     name: "{{ service.container_name }}"
+    ignore_missing: "{{ kolla_action_stop_ignore_missing | bool }}"
   when:
     - service.container_name not in skip_stop_containers
   with_dict: "{{ project_services | select_services_enabled_and_mapped_to_host }}"

kolla_ansible/cli/commands.py

@@ -281,6 +281,11 @@ class Stop(KollaAnsibleMixin, Command):
             required=True,
             help="WARNING! This action will remove the Openstack deployment!",
         )
+        group.add_argument(
+            "--ignore-missing",
+            action="store_true",
+            help="Don't fail if there are missing containers"
+        )
         return parser
 
     def take_action(self, parsed_args):
@@ -288,6 +293,9 @@ class Stop(KollaAnsibleMixin, Command):
 
         extra_vars = {}
         extra_vars["kolla_action"] = "stop"
+        extra_vars["kolla_action_stop_ignore_missing"] = (
+            "yes" if parsed_args.ignore_missing else "no"
+        )
 
         playbooks = _choose_playbooks(parsed_args)
 

releasenotes/notes/kolla-ansible-stop-ignore-missing-be57276213f0a7cd.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Adds the flag ``--ignore-missing`` to ``kolla-ansible stop`` to avoid
+    failing when containers are absent.