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43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
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watchtower
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==========
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[`Watchtower`][1] is an application that will monitor your running Docker containers
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and watch for changes to the images that those containers were originally
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started from. If watchtower detects that an image has changed, it will
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automatically restart the container using the new image.
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## docker-compose.yml
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```
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watchtower:
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image: centurylink/watchtower
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command: >
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mysql
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mongo
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nginx
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redis
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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restart: always
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```
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> It'll monitor all containers if no `command` in YAML.
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## Up and Running
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```
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$ docker-compose up -d
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$ docker-compose logs
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watchtower_1 | time="2015-09-02T02:31:39Z" level=info msg="Checking containers for updated images"
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watchtower_1 | time="2015-09-02T02:31:56Z" level=info msg="Found new redis:latest image (3d86...76)"
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watchtower_1 | time="2015-09-02T02:31:56Z" level=info msg="Stopping /redis (8f51...f4) with SIGTERM"
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watchtower_1 | time="2015-09-02T02:32:06Z" level=info msg="Starting /redis"
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watchtower_1 | time="2015-09-02T02:37:06Z" level=info msg="Checking containers for updated images"
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watchtower_1 | time="2015-09-02T02:42:10Z" level=info msg="Checking containers for updated images"
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```
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[1]: https://hub.docker.com/r/centurylink/watchtower/
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