service: Add support for redis

roles/service/defaults/main.yaml

@@ -11,6 +11,7 @@ service_container_secrets: []
 service_container_env: {}
 
 service_database_type: none
+service_redis: false
 
 service_additional_containers: []
 

roles/service/meta/argument_specs.yaml

@@ -189,6 +189,13 @@ argument_specs:
           - Required if service_database_type is postgres, does nothing otherwise
         type: str
         required: false
+      service_redis:
+        description: >-
+          Whether to install redis in a container accessible to the service at host
+          {{ service_name }}-redis.
+        type: bool
+        required: false
+        default: false
 
       service_additional_containers:
         description:

roles/service/tasks/main.yaml

@@ -6,10 +6,14 @@
   ansible.builtin.set_fact:
     _service_container_mounts: []
 
-- name: Databse for {{ service_name }}
+- name: Database for {{ service_name }}
   ansible.builtin.include_tasks: database.yaml
   when: _service_setup_database
 
+- name: Redis for {{ service_name }}
+  ansible.builtin.include_tasks: redis.yaml
+  when: service_redis
+
 - name: Secrets for {{ service_name }}
   ansible.builtin.include_tasks: secrets.yaml
   when: _service_container_secrets | length > 0

roles/service/tasks/redis.yaml

@@ -0,0 +1,10 @@
+---
+- name: Redis container for {{ service_name }}
+  ansible.builtin.import_role:
+    name: container
+  vars:
+    container_name: "{{ service_name }}-redis"
+    container_image: docker.io/valkey/valkey:alpine
+    container_networks:
+      - "{{ service_name }}"
+    container_auto_update: "{{ service_auto_update }}"

roles/service/vars/main.yaml

@@ -39,6 +39,7 @@ _service_container_requires: >-
   {{
     service_requires
     + ([_service_database_name + '.service'] if _service_setup_database else [])
+    + ([service_name + '-redis.service'] if service_redis else [])
   }}
 _service_container_wants: >-
   {{