when CoreOS stable channel updated Docker. All my data volume containers broke during the migration and migration could not be reverted.
As for the second issue: when two systemd services that pull containers with the same base images would start simultaneously, they would deadlock pretty reliably. Had to flock every pull as a result. This might be fixed by now though.
I got bit hard by this issue:
https://github.com/docker/docker/issues/20079
when CoreOS stable channel updated Docker. All my data volume containers broke during the migration and migration could not be reverted.
As for the second issue: when two systemd services that pull containers with the same base images would start simultaneously, they would deadlock pretty reliably. Had to flock every pull as a result. This might be fixed by now though.