I thought this would be hard, but turns out the following oneliner does it, with maybe no sideeffects ?
echo 'docker() { [ "$1" = "sh" ] && docker exec -it "$2" sh || command docker "$@"; }' >> ~/.bashrc && source ~/.bashrc
This creates a bash alias for “docker ps” , every other command should run as normal
Now I just need to remember to run this one liner on every single computer I use in the future…
dit="docker exec -it $@"Seems more flexible to me. Also, you shouldn’t give functions or variables the same names as binaries.
The
"$@"doesn’t do that you think it does in an alias. It gets expanded on alias creation.Actually it works exactly as I intended it to
Not all docker containers contain a shell binary.. You can still propose an issue to moby, the upstream of docker, though.
How do you go inside those containers and poke around then ?
Generally speaking you shouldn’t be poking around running containers. It is rare that I have ever needed to do that. If you want to inspect the contents of an image then tools like dive are helpful. If the container produces some useful output that you might need then put that into a volume, you can then mount that volume to a debug/inspect container to read the files without messing around with the rest of the container.
Shell-less containers are a great security feature - it is extremely hard to get a reverse shell on something that does not have any shell. And if you must have a shell to debug something docker already has a feature for that docker debug which works for shell-less containers as well.
