Bash utility to clean docker containers and images

docker_clean.sh

# Thanks to:
# https://gist.github.com/bastman/5b57ddb3c11942094f8d0a97d461b430


# Volumes
# 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

#docker volume rm $(docker volume ls -q -f 'dangling=true')
#The "-f" parameter is necessary for describe the filter ('dangling=true')

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

# Images
# 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 }')

# Containers
# 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")

# Clean up containers and then images
# docker rm  $(docker ps -qa --no-trunc --filter "status=exited") 
# docker rmi $(docker images --filter "dangling=true" -q --no-trunc)


# Docker VM
# Resize disk space for docker vm
# docker-machine create --driver virtualbox --virtualbox-disk-size "40000" default


# pruning the networks https://docs.docker.com/engine/reference/commandline/network_prune/:
# docker network prune
# system prune https://docs.docker.com/engine/reference/commandline/system_prune/:
# docker system info
# docker system prune
# docker system prune -a
# docker system prune -a --volumes



# Delete every docker container
# Must be run first because images are attached to containers
nuke_containers () {
    docker rm -f $(docker ps -a -q)
}

# Delete every Docker image
# If any containers belong to an image, the image can't be deleted.
# If any images are a base for another image, they are force-deleted.
nuke_images () {
    docker rmi -f $(docker images -q)
}

usage() {
    cat <<- USAGE
usage: $0 [option]

options:
-a  | --all         nuke all the containers and images
-c  | --containers  nuke all the containers
-i  | --images      nuke all the images
-h  | --help
USAGE
}

case $1 in
    -a | --all )            nuke_containers && nuke_images
                            exit
                            ;;
    -c | --containers )     nuke_containers
                            exit
                            ;;
    -i | --images )         nuke_images
                            exit
                            ;;
    -h | --help )           usage
                            exit
                            ;;
    * )                     usage
                            exit 1
esac