The upgrade seemed to go well but docker started behaving a little weird.
What started making me worry was the fact that my docker is using the btrfs storage backend and making tons of subvolumes. As far as I know, there is no way to move those over. So I just copied and pasted and crossed my fingers. Of course this didn’t work. Everything started up fine, but once you try to update an image and things like that it freaks out.
If you have done things right, don’t waste your time trying to fix things. Just stop docker, remove everything in /var/lib/docker and start docker up like its fresh and re create all your containers.
Anyways, node1 is much happier now so I consider this a success.