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* Update update-and-cleanup.md spotify dockergc is UNMAINTAINED, they advice to consider using the `docker system prune` command instead. "This repository has been archived by the owner on Feb 2, 2021. It is now read-only." https://github.com/spotify/docker-gc * Revise `update-and-cleanup.md` Merges the image update + cleanup sections. --------- Co-authored-by: Brennan Kinney <5098581+polarathene@users.noreply.github.com>
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| title |
|---|
| Maintenance | Update and Cleanup |
containrrr/watchtower is a service that monitors Docker images for updates, automatically applying them to running containers.
!!! example "Automatic image updates + cleanup"
```yaml title="compose.yaml"
services:
watchtower:
image: containrrr/watchtower:latest
# Automatic cleanup (removes older image pulls from wasting disk space):
environment:
- WATCHTOWER_CLEANUP=true
volumes:
- /var/run/docker.sock:/var/run/docker.sock
```
!!! tip "Updating only specific containers"
The default `watchtower` service will check every 24 hours for any new image updates to pull, **not only the images** defined within your `compose.yaml`.
The images to update can be restricted with a custom command that provides a list of containers names and other config options. Configuration is detailed in the [`watchtower` docs][watchtower-docs].
!!! info "Manual cleanup"
`watchtower` also supports running on-demand with `docker run` or `compose.yaml` via the `--run-once` option.
You can also directly invoke cleanup of Docker storage with:
- [`docker image prune --all`][docker-docs-prune-image]
- [`docker system prune --all`][docker-docs-prune-system] (_also removes unused containers, networks, build cache_).
- Avoid the `--all` option to only remove ["dangling" content][docker-prune-dangling] (_eg: Orphaned images_).