My workaround is:
mkdir -p /var/lib/docker.migrating/
touch /var/lib/docker.migrating/dummy
Then the upgrade succeeds.
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https://bugs.launchpad.net/bugs/1922203
Title:
docker.io
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: docker.io (Ubuntu)
Status: New => Confirmed
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Title:
Same here. On 3/7 of my hosts I get the error described above. These 3
hosts use ZFS while the remaining 4 don't.
# zfs list | fgrep docker | head -5
rpool/var/lib/docker
5.73G 236G 2.74G /var/lib/docker
