使用 watchtower 自動更新 docker images [Jonathan's Wiki 筆記]

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====== 使用 watchtower 自動更新 docker images ======

==== 定期模式 ====
  * .env 檔加入 THE_HOST <cli>
echo THE_HOST=`hostname` >> .env
</cli>
  * 在 docker-compose.yml 內 services: 加入 watchtower: Exp <file>
services:
  your-app:
    image: your-image:latest
    # 其他應用配置...

  watchtower:
    container_name: watchtower
    image: containrrr/watchtower
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      - TZ=Asia/Taipei
      - WATCHTOWER_SCHEDULE=0 0 4 * * *  # 每天凌晨4點檢查更新
      - WATCHTOWER_CLEANUP=true  # 清理舊的映像檔
      #- WATCHTOWER_NOTIFICATIONS=slack  # 使用 Slack 通知
      #- SLACK_HOOK_URL=https://hooks.slack.com/services/YOUR/SLACK/WEBHOOK
      #- WATCHTOWER_NOTIFICATIONS=email  # 使用 EMail 通知
      #- WATCHTOWER_NOTIFICATIONS_HOSTNAME=${THE_HOST}
      #- WATCHTOWER_NOTIFICATION_EMAIL_FROM=fromaddress@gmail.com
      #- WATCHTOWER_NOTIFICATION_EMAIL_TO=toaddress@gmail.com
      #- WATCHTOWER_NOTIFICATION_EMAIL_SERVER=smtp.gmail.com
      #- WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=587
      #- WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER=fromaddress@gmail.com
      #- WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD=app_password
      #- WATCHTOWER_NOTIFICATION_EMAIL_DELAY=2
    labels:
      - "com.centurylinklabs.watchtower.enable=true"
    restart: unless-stopped
</file>

==== CLI 模式 ====
  * 直接執行 docker cli<cli>
docker run --rm -v /var/run/docker.sock:/var/run/docker.sock containrrr/watchtower --run-once
</cli>或是<cli>
docker compose run watchtower --run-once
</cli>

==== API 模式 ====
  * 參考 - https://containrrr.dev/watchtower/http-api-mode/
  * 如果不想定期檢查更新, 可以透過呼叫 API 方式進行檢查更新
  * Exp. Listen Port:8383 , API-Token:mytoken-123456789
  * docker-compose.yml<file>
services:
  watchtower:
    container_name: watchtower
    image: containrrr/watchtower
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    command: --http-api-update
    environment:
      - TZ=Asia/Taipei
      - WATCHTOWER_HTTP_API_TOKEN=mytoken-123456789
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_NOTIFICATIONS=email
      - WATCHTOWER_NOTIFICATIONS_HOSTNAME=${THE_HOST}
      - WATCHTOWER_NOTIFICATIONS_HOSTNAME=myserver
      - WATCHTOWER_NOTIFICATION_EMAIL_FROM=tryweb@ichiayi.com
      - WATCHTOWER_NOTIFICATION_EMAIL_TO=tryweb@ichiayi.com
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER=smtp.gmail.com
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=587
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER=myaccountid
      - WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD=mypassword
      - WATCHTOWER_NOTIFICATION_EMAIL_DELAY=2
    labels:
      - "com.centurylinklabs.watchtower.enable=true"
    ports:
      - 8383:8080
    restart: unless-stopped
</file>
    * 呼叫 API 方式<cli>
curl -H "Authorization: Bearer mytoken-123456789" http://localhost:8383/v1/update
</cli>

===== 參考網址 =====
  * https://claude.ai/
  * https://containrrr.dev/watchtower/

{{tag>docker auto-upgrade}}