It is important that from time to time, machines running Docker are cleaned because otherwise, Docker leftovers will start piling up and eating precious storage space.
To get a list of currently stopped containers, run:
$ docker container ls -a --filter status=exited --filter status=created
If everything looks good and all the containers listed are not necessary anymore, you can run the following command to remove them:
$ docker container prune
It is also possible to specify filters with the
$ docker container prune --filter "until=48h"
This will remove all images created more than 48 hours ago, according to their timestamp relative to the current time.
List all Docker images:
$ docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE jekyll/builder latest 111bf2f57942 14 hours ago 561MB jekyll/builder <none> 56e0f8a07d54 38 hours ago 561MB jekyll/builder <none> ddaac7a96770 2 days ago 561MB jekyll/builder <none> 9de64f166ee4 4 days ago 562MB gitlab/gitlab-ce latest a4e39f0caf21 5 days ago 1.75GB jekyll/builder <none> cbdb93edfaa7 6 days ago 562MB jekyll/builder <none> e9101988ac31 7 days ago 562MB jekyll/builder <none> 80061ade1c9d 9 days ago 562MB gitlab/gitlab-ce <none> f3df0ca02243 9 days ago 1.75GB jekyll/builder <none> fcee4caf1c81 10 days ago 562MB jekyll/builder <none> 40a9987907ac 11 days ago 477MB jekyll/builder <none> 7626c80c2d4c 12 days ago 477MB gitlab/gitlab-runner-helper x86_64-a987417a 6eb5de6b5081 13 days ago 52.4MB
It is possible to remove images by specifying their ID. For example, this command will remove both
$ docker image rm a4e39f0caf21 f3df0ca02243
It is possible to prune unused images automatically:
$ docker image prune
List all volumes by running:
$ docker volume ls
Then, you can remove volumes that are not in use:
$ docker volume prune
This will delete anything that is not in use anymore. Be careful, as this command will delete stopped containers as well as their volumes and images. Only run this if all necessary containers are running.
$ docker system prune --volumes WARNING! This will remove: - all stopped containers - all networks not used by at least one container - all volumes not used by at least one container - all dangling images - all build cache Are you sure you want to continue? [y/N]
ls keywords can be used after
image which will respectively remove unused or list the present objects on the host.
$ docker container ls $ docker container prune $ docker network ls $ docker network prune $ docker volume ls $ docker volume prune $ docker image ls $ docker image prune