So, last week I was writing a post about cleaning up after docker, and I got a bit carried away and ended up deleting a data container. The container was no longer running, but it's docker volume was still in use by other running containers.
Thankfully, I didn't use the
-v flag (which removes the containers volumes as well - although volumes in use wont get removed), so I still had all the data, I just had lost the container that created it.
The problem is, docker references the volume via the container when mounting it as a shared volume. As I had deleted the container, I could no longer reference the volume.
Thankfully there is a very simple solution to get the volume mapped back to the data container.