service: Use saner defaults for additional containers

roles/service/vars/main/additional.yaml

@@ -1,16 +1,75 @@
 ---
+_service_additional_containers_with_default_image: >-
+  {{
+    ([{ 'image': service_container_image }] * service_additional_containers | length)
+    | zip(service_additional_containers)
+    | map('combine')
+  }}
+
+_service_additional_container_same_image_defaults:
+  user: "{{ service_container_user }}"
+  command: "{{ service_container_command }}"
+  entrypoint: "{{ service_container_entrypoint }}"
+  devices: "{{ service_container_devices }}"
+  env: "{{ service_container_env }}"
+  add_capabilities: "{{ service_container_add_capabilities }}"
+
+_service_additional_container_different_image_defaults:
+  user: ""
+  command: []
+  entrypoint: ""
+  mounts: []
+  devices: []
+  publish_ports: []
+  env: {}
+  add_capabilities: []
+  secrets: []
+
+_service_additional_same_image_containers: >-
+  {{
+    _service_additional_containers_with_default_image
+    | selectattr('image', '==', service_container_image)
+  }}
+
+_service_additional_different_image_containers: >-
+  {{
+    _service_additional_containers_with_default_image
+    | selectattr('image', '!=', service_container_image)
+  }}
+
 _service_additional_containers: >-
   {{
-    service_additional_containers
-      | zip(
-         service_additional_containers
-            | map(attribute='name')
-            | map('regex_replace', '^', service_name ~ '-')
-            | map('community.general.dict_kv', 'name')
+    (
+      (
+        (
+          [_service_additional_container_same_image_defaults] *
+          (_service_additional_same_image_containers | length)
         )
-      | map('combine')
+        | zip(_service_additional_same_image_containers)
+        | map('combine')
+      ) +
+      (
+        (
+          [_service_additional_container_different_image_defaults] *
+          (_service_additional_different_image_containers | length)
+        )
+        | zip(_service_additional_different_image_containers)
+        | map('combine')
+      )
+    )
+    | zip(
+        (
+          _service_additional_same_image_containers +
+          _service_additional_different_image_containers
+        )
+        | map(attribute='name')
+        | map('regex_replace', '^', service_name ~ '-')
+        | map('community.general.dict_kv', 'name')
+    )
+    | map('combine')
   }}
 
+
 _service_additional_container_wants: >-
   {{
     service_wants