I hit the same problem, and I followed this guide to switch my storage driver from aufs to overlay2: https://docs.docker.com/storage/storagedriver/overlayfs-driver/ , then the upgrade worked.
Migrating docker images from one storage driver to another is a really painful process: you have to save your images as tar files, switch the storage driver, then load them back one after another. An upgrade requiring so much manual intervention like this should never happen in an LTS release. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939106 Title: The aufs storage-driver is no longer supported in docker.io_20.10.7-0ubuntu1~20.04.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/docker.io/+bug/1939106/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
