How to get the list of dependent child images in Docker?

Question

I\'m trying to remove an image and I get:

# docker rmi f50f9524513f  
Failed to remove image (f50f9524513f): Error response from daemon: conflict: unable to          


        

Answer 1

I cooked up this to recursively find children, their repo tags, and print what they're doing:

docker_img_tree() {
    for i in $(docker image ls -qa) ; do
        [ -f "/tmp/dii-$i"  ] || ( docker image inspect $i > /tmp/dii-$i)
        if grep -qiE 'Parent.*'$1 /tmp/dii-$i ; then
            echo "$2============= $i (par=$1)"
            awk '/(Cmd|Repo).*\[/,/\]/' /tmp/dii-$i | sed "s/^/$2/"
            docker_img_tree $i $2===
        fi
    done
}

Don't forget to delete /tmp/dii-* if your host isn't secure.