switch memcached from tcp to unix domain socket

installer/roles/local_docker/defaults/main.yml

@@ -8,7 +8,5 @@ postgresql_image: "postgres:{{postgresql_version}}"
 
 memcached_image: "memcached"
 memcached_version: "alpine"
-memcached_hostname: "memcached"
-memcached_port: "11211"
 
 compose_start_containers: true

installer/roles/local_docker/tasks/compose.yml

@@ -10,6 +10,12 @@
     state: directory
     mode: 0777
 
+- name: Create Memcached socket directory
+  file:
+    path: "{{ docker_compose_dir }}/memcached_socket"
+    state: directory
+    mode: 0777
+
 - name: Create Docker Compose Configuration
   template:
     src: "{{ item }}.j2"

installer/roles/local_docker/templates/credentials.py.j2

@@ -10,14 +10,4 @@ DATABASES = {
     }
 }
 
-CACHES = {
-    'default': {
-        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
-        'LOCATION': '{}:{}'.format("{{ memcached_hostname }}", "{{ memcached_port }}")
-    },
-    'ephemeral': {
-        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
-    },
-}
-
 BROADCAST_WEBSOCKET_SECRET = "{{ broadcast_websocket_secret | b64encode }}"

installer/roles/local_docker/templates/docker-compose.yml.j2

@@ -25,6 +25,7 @@ services:
       - "{{ docker_compose_dir }}/credentials.py:/etc/tower/conf.d/credentials.py"
       - "{{ docker_compose_dir }}/nginx.conf:/etc/nginx/nginx.conf:ro"
       - "{{ docker_compose_dir }}/redis_socket:/var/run/redis/:rw"
+      - "{{ docker_compose_dir }}/memcached_socket:/var/run/memcached/:rw"
     {% if project_data_dir is defined %}
       - "{{ project_data_dir +':/var/lib/awx/projects:rw' }}"
     {% endif %}
@@ -78,6 +79,7 @@ services:
       - "{{ docker_compose_dir }}/environment.sh:/etc/tower/conf.d/environment.sh"
       - "{{ docker_compose_dir }}/credentials.py:/etc/tower/conf.d/credentials.py"
       - "{{ docker_compose_dir }}/redis_socket:/var/run/redis/:rw"
+      - "{{ docker_compose_dir }}/memcached_socket:/var/run/memcached/:rw"
     {% if project_data_dir is defined %}
       - "{{ project_data_dir +':/var/lib/awx/projects:rw' }}"
     {% endif %}
@@ -125,15 +127,19 @@ services:
     volumes:
       - "{{ docker_compose_dir }}/redis.conf:/usr/local/etc/redis/redis.conf:ro"
       - "{{ docker_compose_dir }}/redis_socket:/var/run/redis/:rw"
+      - "{{ docker_compose_dir }}/memcached_socket:/var/run/memcached/:rw"
 
   memcached:
     image: "{{ memcached_image }}:{{ memcached_version }}"
     container_name: awx_memcached
+    command: ["-s", "/var/run/memcached/memcached.sock", "-a", "0666"]
     restart: unless-stopped
     environment:
       http_proxy: {{ http_proxy | default('') }}
       https_proxy: {{ https_proxy | default('') }}
       no_proxy: {{ no_proxy | default('') }}
+    volumes:
+      - "{{ docker_compose_dir }}/memcached_socket:/var/run/memcached/:rw"
 
   {% if pg_hostname is not defined %}
   postgres:

installer/roles/local_docker/templates/environment.sh.j2

@@ -6,7 +6,5 @@ DATABASE_PASSWORD={{ pg_password|default('awxpass')|quote }}
 {% if pg_admin_password is defined %}
 DATABASE_ADMIN_PASSWORD={{ pg_admin_password|quote }}
 {% endif %}
-MEMCACHED_HOST={{ memcached_hostname|default('memcached') }}
-MEMCACHED_PORT={{ memcached_port|default('11211')|quote }}
 AWX_ADMIN_USER={{ admin_user|quote }}
 AWX_ADMIN_PASSWORD={{ admin_password|quote }}