Use docker swarm for zero downtime deployments

.github/workflows/status.yaml

@@ -31,8 +31,9 @@ jobs:
           WATCHTOWER_NOTIFICATION_URL: ${{ secrets.watchtower_notification_url }}
           EMAIL: ${{ secrets.caddy_email }}
         with:
+          docker_swarm: true
           remote_docker_host: ${{ secrets.server_address }}
           tailscale_ssh: true # no need for manual private and public keys
           upload_directory: true # upload docker directory
           docker_compose_directory: caddy # directory to upload
-          args: -p status up -d
+          args: -p status --prune

docker-compose.yml

@@ -21,6 +21,28 @@ services:
       - config:/config
     networks:
       web:
+    healthcheck:
+      # https://ryanblunden.com/for-those-looking-for-a-http-health-check-in-alpine-images-wget-is-available-from-the-base-image-a07997be8699
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost"]
+      interval: 5s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+    deploy:
+      # swarm zero-down time deployment
+      update_config:
+        delay: 5s
+        order: start-first
+        monitor: 30s
+        failure_action: rollback
+      rollback_config:
+        parallelism: 0
+        order: stop-first
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 3
+        window: 120s
 
   uptime-kuma:
     image: louislam/uptime-kuma:1.21.1@sha256:b302edd66b7d130f7d4b2777a212674f046909721b5a66d7c1858505a4780981
@@ -29,6 +51,21 @@ services:
       - /home/ubuntu/uptime-kuma:/app/data
     networks:
       web:
+    deploy:
+      # swarm zero-down time deployment
+      update_config:
+        delay: 5s
+        order: start-first
+        monitor: 4s
+        failure_action: rollback
+      rollback_config:
+        parallelism: 0
+        order: stop-first
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 3
+        window: 120s
 
 configs:
   Caddyfile: