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docker cleanup guide: containers, images, volumes, networks

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)
$ docker volume ls -qf dangling=true | xargs -r docker volume rm

delete networks

$ docker network ls  
$ docker network ls | grep "bridge"   
$ docker network rm $(docker network ls | grep "bridge" | awk '/ / { print $1 }')

remove docker images

// see: http://stackoverflow.com/questions/32723111/how-to-remove-old-and-unused-docker-images

$ docker images
$ docker rmi $(docker images --filter "dangling=true" -q --no-trunc)

$ docker images | grep "none"
$ docker rmi $(docker images | grep "none" | awk '/ / { print $3 }')

remove docker containers

// see: http://stackoverflow.com/questions/32723111/how-to-remove-old-and-unused-docker-images

$ docker ps
$ docker ps -a
$ docker rm $(docker ps -qa --no-trunc --filter "status=exited")

Resize disk space for docker vm

$ docker-machine create --driver virtualbox --virtualbox-disk-size "40000" default

regarding bridge networks I find the following modification more robust:

docker network ls | awk '$3 == "bridge" && $2 != "bridge" { print $1 }'

In this example I do not want to delete the network named ($2) "bridge", if I am not mistaken that network is predefined by docker.

blankdots commented Apr 7, 2017

What about pruning the networks https://docs.docker.com/engine/reference/commandline/network_prune/:
$ docker network prune
And docker system prune https://docs.docker.com/engine/reference/commandline/system_prune/:
$ docker system prune

They seem less distructive.

@blankdots those are great, but are only available as of 1.13.

To delete volumes, use: docker volume rm $(docker volume ls -f 'dangling=true')
The "-f" parameter is necessary for describe the filter ('dangling=true'). [[]]'s

thebaconguy commented Oct 6, 2017

$ docker system prune -a

WARNING! This will remove:
	- all stopped containers
	- all volumes not used by at least one container
	- all networks not used by at least one container
	- all images without at least one container associated to them
Are you sure you want to continue? [y/N] y

----> from documentation example

I was looking for a clean everything (almost, see EDIT below) not running or in use command to do a clean reset before installing Rancher to manage the entire system (highly recommend watching the demo and trying it out btw!). Hope this comes in handy for someone else looking for a fresh start! You can still use the filtering arguments to prune only resources matching a certain label or before a certain timestamp.

Thanks to @blankdots for the suggestion above to look into the docker system prune commands!

EDIT: This does not seem to include removal of unused/dangling volumes, so @professordennis's suggestion is still best to use for that case:

$ docker volume rm $(docker volume ls -f dangling=true -q)

----> also found from this documentation

liweys commented Nov 2, 2017

how to clean it before starting docker? docker cannot be started due to no space.

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