Useful snippets for docker cleanup tasks

Docker Cleanup Snippets.md

Docker Cleanup

Host cleanup - cleanup old kernels for ubuntu and other various apt related updates

apt-get autoclean
apt-get autoremove

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List out the volumes that are no longer necessary or used

docker volume ls -qf dangling=true

Remove the volumes listed above

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

list leftover images not being used by Containers

docker images -q -f dangling=true

Remove leftover images not being used by Containers

docker rmi $(docker images -q -f dangling=true)

Stop all containers

docker stop $(docker ps -a -q)

Remove all containers

docker rm $(docker ps -a -q)

Copy contents from inside a container (https://docs.docker.com/engine/reference/commandline/cp/)

docker cp <container-name>:</container/directory> </local/path>

For further cleanup automation scripts

https://lebkowski.name/docker-volumes/

Output running nginx config in LS.io LE Container:

docker exec -it <container_name> bash
mkdir /run/nginx
cp /run/nginx.pd /run/nginx
nginx -T -c /config/nginx/nginx.conf (or substitute your mapped location to your nginx.conf)

Browse container filesystem from host:

Find PID of container
docker inspect --format {{.State.Pid}} $YOUR_CONTAINER
Browse filesystem
/proc/$(docker inspect --format {{.State.Pid}} $YOUR_CONTAINER)/root