Automatic update
Docker images are handy but it can get a a hassle to keep them updated. Also when a repository is automated you want to get these images when they get out.
One could setup a complex action/hook-based workflow using probes, but there is a nice, easy to use docker image that solves this issue and could prove useful: watchtower.
A docker-compose example:
services:
watchtower:
restart: always
image: containrrr/watchtower:latest
volumes:
- /var/run/docker.sock:/var/run/docker.sock
For more details, see the manual
Automatic cleanup
When you are pulling new images in automatically, it would be nice to have them cleaned up as well. There is also a docker image for this: spotify/docker-gc.
A docker-compose example:
services:
docker-gc:
restart: always
image: spotify/docker-gc:latest
volumes:
- /var/run/docker.sock:/var/run/docker.sock
For more details, see the manual
Or you can just use the --cleanup option provided by containrrr/watchtower.