Add image role, support logging in to registries

roles/service/defaults/main.yaml

@@ -17,3 +17,7 @@ service_additional_containers: []
 service_requires: []
 service_wants: []
 service_auto_update: true
+
+service_container_image_creds:
+  username: ""
+  password: ""

roles/service/meta/argument_specs.yaml

@@ -35,6 +35,23 @@ argument_specs:
         description: "The image to run in the service container(s), in FQIN format (registry/imagename:tag)."
         type: str
         required: true
+      service_container_image_creds:
+        description: Credentials used to authenticate with the registry
+        type: dict
+        required: false
+        default:
+          username: ""
+          password: ""
+        options:
+          username:
+            description: Username
+            type: str
+            required: true
+          password:
+            description: Password
+            type: str
+            required: true
+
       service_container_user:
         description: The UID to run as inside the container
         type: str

roles/service/tasks/main.yaml

@@ -24,6 +24,7 @@
   vars:
     container_name: "{{ service_name }}"
     container_image: "{{ service_container_image }}"
+    container_image_creds: "{{ service_container_image_creds }}"
     container_user: "{{ service_container_user }}"
     container_mounts: "{{ _service_container_mounts }}"
     container_publish_ports: "{{ service_container_publish_ports }}"