Docker exec on all running containers

Question

I am running several docker containers running on my server, and need to exec a git pull for a repository that is on all of them.

I have tried using this:

Answer 1

Using Docker exec you can run the command on the container one at a time, but from your Question you want to run the command on all running container, here you go.

    for containerId in $(docker ps -q)
    do
        docker exec -it $containerId bash -c 'cd /var/www/html && git pull'
    done

I assume git is already installed in all running container and all base on bash

Or more compact form can be

for i in `docker ps -q`; do docker exec -it $i bash -c 'cd /var/www/html && git pull'; done