I have one container which needs a lot of space and I want it to use a dedicated drive on my server.
This answer comprehensively explains how to move docker data-root. But is it possible to have two data-roots and assign a specific container to the second one?
You sound like you have specific container-based needs. Thus, moving docker data-root to another location does not seem to be the suited answer here (though you may do it anyway).
What you need are "volumes".
Wrap your image within a docker-compose file, and mount some container directories as volume pointing to some "host" path (outside of docker data-root). They must indeed be the directories that will request a lot of space, and point to a VG or external mounting point (e.g. NFS) with sufficient space !
Eg:
...
my-service:
image: my-image
volumes:
- "/path/within/host/opt/data/tmp/:/path/within/container/cache/:rw"
- "/path/within/host/opt/data/layers/:/path/within/container/layers/:rw"
- "/path/within/host/opt/data/logs/:/path/within/container/logs/:rw"
...
(note that "rw" can be omitted here, since it's the default value)
