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설치

"docker-compose.yml" 파일을 아래와 같이 생성 합니다.

version: "3"

services:
  watchtower:
    image: containrrr/watchtower
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      TZ: Asia/Seoul
      WATCHTOWER_POLL_INTERVAL: 43200
      WATCHTOWER_CLEANUP: "true"  # Enable cleanup of old images
    restart: unless-stopped

"WATCHTOWER_POLL_INTERVAL"은 watchtower가 실행될 주기를 의미합니다.

단위는 Second (초)이며, 예제에 있는 43200은 12시간을 의미 합니다.

docker를 실행 합니다.

docker-compose up -d

이후 Watchtower Container의 Log를 보시면 아래와 같이 주어진 주기마다 Scan 및 Update를 진행한 이력을 확인하실 수 있습니다.

date stream content
2023/06/24 09:53:01 stderr time="2023-06-24T09:53:01+09:00" level=info msg="Session done" Failed=0 Scanned=9 Updated=0 notify=no
2023/06/23 09:53:01 stderr time="2023-06-23T09:53:01+09:00" level=info msg="Session done" Failed=0 Scanned=9 Updated=0 notify=no
2023/06/22 09:53:25 stderr time="2023-06-22T09:53:25+09:00" level=info msg="Session done" Failed=0 Scanned=9 Updated=1 notify=no
2023/06/22 09:53:24 stderr time="2023-06-22T09:53:24+09:00" level=info msg="Creating /nextcloud"
2023/06/22 09:53:19 stderr time="2023-06-22T09:53:19+09:00" level=info msg="Stopping /nextcloud (786e591f6e53) with SIGTERM"
2023/06/22 09:53:12 stderr time="2023-06-22T09:53:12+09:00" level=info msg="Found new lscr.io/linuxserver/nextcloud:latest image (3321996051d7)"
2023/06/21 09:52:45 stderr time="2023-06-21T09:52:45+09:00" level=info msg="Note that the first check will be performed in 23 hours, 59 minutes, 59 seconds"
2023/06/21 09:52:45 stderr time="2023-06-21T09:52:45+09:00" level=info msg="Scheduling first run: 2023-06-22 09:52:45 +0900 KST"
2023/06/21 09:52:45 stderr time="2023-06-21T09:52:45+09:00" level=info msg="Checking all containers (except explicitly disabled with label)"
2023/06/21 09:52:45 stderr time="2023-06-21T09:52:45+09:00" level=info msg="Using no notifications"
2023/06/21 09:52:45 stderr time="2023-06-21T09:52:45+09:00" level=info msg="Watchtower 1.5.3"
2023/06/21 09:41:05 stderr time="2023-06-21T09:41:05+09:00" level=info msg="Waiting for running update to be finished..."
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