Should I be concerned about excess, non-running, Docker containers?

Question

Every docker run command, or every RUN command inside a Dockerfile, creates a container. If the container is no longer running it can still be seen wit

Answer 1

If you run a container with a volume and do not use docker rm -v to remove it then the volume is not being removed after you remove a container. Also there is an issue with a vfs storage driver. If you forget to clean, volumes will eat up your disk space.