container: add support for redis

roles/container/defaults/main.yml

@@ -3,6 +3,7 @@
 docker_host_user: false
 docker_volume_type: named
 docker_mariadb_config: {}
+docker_redis_persistence: false
 dockerfile: []
 
 docker_phpmyadmin_basicauth: true

roles/container/meta/argument_specs.yml

@@ -63,7 +63,13 @@ argument_specs:
         elements: str
         choices:
           - memcached
+          - redis
         default: []
+      docker_redis_persistence:
+        description: Whether to save redis data to persistent storage
+        type: bool
+        required: false
+        default: false
       docker_phpmyadmin_basicauth:
         description: Whether to enable basicauth for phpmyadmin
         type: bool

roles/container/tasks/additional.yml

@@ -10,3 +10,45 @@
       - "{{ container_networks[0] }}"
     log_driver: local
   when: "'memcached' in docker_additional_services"
+
+- name: Redis
+  when: "'redis' in docker_additional_services"
+  block:
+    - name: Reset redis container mount definition var
+      set_fact:
+        redis_container_mount_definition: []
+
+    - name: Set up redis container data bind mount
+      when: docker_volume_type == 'bind'
+      block:
+        - name: Create redis data bind mount directory for {{ docker_service_name }}
+          file:
+            path: "{{ docker_mounts_dir }}/redis"
+            state: directory
+
+        - name: Set redis_container_mount_definition for redis data bind mount
+          set_fact:
+            redis_container_mount_definition:
+              - source: "{{ docker_mounts_dir + '/redis' }}"
+                target: /data
+                type: bind
+
+    - name: Set redis_container_mount_definition for redis data named volume
+      set_fact:
+        redis_container_mount_definition:
+          source: "{{ docker_service_name + '_redis' }}"
+          target: /data
+          type: volume
+      when: docker_volume_type == 'named'
+
+    - name: "Redis container for {{ docker_service_name }}"
+      docker_container:
+        name: "{{ docker_service_name }}_redis"
+        image: redis:alpine
+        pull: true
+        restart_policy: always
+        mounts: "{{ redis_container_mount_definition }}"
+        command: "{{ '--save 60 1' if docker_redis_persistence else omit }}"
+        networks:
+          - "{{ container_networks[0] }}"
+        log_driver: local

roles/container/tasks/main.yml

@@ -24,10 +24,6 @@
   include_tasks: proxy.yml
   when: reverse_proxy_type != 'none'
 
-- name: Additional services
-  include_tasks: additional.yml
-  when: docker_additional_services is defined
-
 - name: Create directory /opt/{{ docker_service }}
   file:
     path: "/opt/{{ docker_service }}"
@@ -80,6 +76,10 @@
   include_tasks: database.yml
   when: docker_database != 'none'
 
+- name: Additional services
+  include_tasks: additional.yml
+  when: docker_additional_services is defined
+
 - name: Container volumes
   import_tasks: volumes.yml