registry: Add monthly garbage collection

services/registry/stack.yml

@@ -28,6 +28,25 @@ services:
         - traefik.http.services.{{ service }}.loadbalancer.server.port=5000
     networks: ['{{ ingress_network }}']
 
+  image-cleanup-job:
+    image: registry:2
+    command: ["registry", "garbage-collect", "/etc/docker/registry/config.yml", "-m"]
+    secrets:
+      - source: htpasswd_{{ registry_htpasswd.stat.checksum }}
+        target: /etc/docker/registry/htpasswd
+    configs:
+      - source: registry_{{ registry_config.checksum }}
+        target: /etc/docker/registry/config.yml
+    deploy:
+      placement:
+        constraints:
+          - node.role == manager
+      labels:
+        - "swarm.cronjob.enable=true"
+        - "swarm.cronjob.schedule=0 0 0 1 * *"
+      restart_policy:
+        condition: none
+
 configs:
   registry_{{ registry_config.checksum }}:
     file: ./config/config.yml