As reported by @stevvooe over in docker-library/official-images#2654, it's a little bit non-obvious that the dind variants are the only place we have the dependencies for properly running Docker-in-Docker (and that the non-dind tags are simply the client).
He suggested having docker-entrypoint.sh (not dockerd-entrypoint.sh) print a warning if $1 is dockerd, something like:
📎 Hey there! It looks like you're trying to run a Docker daemon.
You probably should use the "dind" image variant instead, something like:
docker run ...
As reported by @stevvooe over in docker-library/official-images#2654, it's a little bit non-obvious that the
dindvariants are the only place we have the dependencies for properly running Docker-in-Docker (and that the non-dindtags are simply the client).He suggested having
docker-entrypoint.sh(notdockerd-entrypoint.sh) print a warning if$1isdockerd, something like: