service: Support specifying wants

roles/service/defaults/main.yaml

@@ -12,4 +12,5 @@ service_database_type: none
 service_additional_containers: []
 
 service_requires: []
+service_wants: []
 service_auto_update: true

roles/service/meta/argument_specs.yaml

@@ -199,6 +199,12 @@ argument_specs:
         required: false
         default: []
         elements: str
+      service_wants:
+        description: List of systemd units this service container weakly depends on.
+        type: list
+        required: false
+        default: []
+        elements: str
       service_auto_update:
         description: Whether to let podman automatically update the service containers whenever the specified image gets updated
         type: bool

roles/service/tasks/main.yaml

@@ -33,7 +33,7 @@
     container_secrets: "{{ _service_container_secrets }}"
     container_env: "{{ service_container_env }}"
     container_requires: "{{ _service_container_requires }}"
-    container_wants: "{{ [service_name + '-socat.socket'] if service_domains | length > 0 else [] }}"
+    container_wants: "{{ _service_container_wants }}"
     container_auto_update: "{{ service_auto_update }}"
 
 - name: Reverse proxy for {{ service_name }}

roles/service/vars/main.yaml

@@ -12,3 +12,5 @@ _service_container_secrets: >
         )
       | map('combine')
   }}
+
+_service_container_wants: "{{ service_wants + ([service_name + '-socat.socket'] if service_domains | length > 0 else []) }}"