FYI -- found this after running into the same problem. This fixed it for me:
journalctl -u snap.docker.dockerd.service
I saw many of these:
docker.dockerd[1475]: failed to start daemon: pid file found, ensure docker is not running or delete /var/snap/docker/471/run/docker.pid
Stopped the docker snap (snap stop docker) Deleted the stale pid, restarted docker (snap start docker) and all was well.
FYI -- found this after running into the same problem. This fixed it for me:
journalctl -u snap.docker. dockerd. service
I saw many of these:
docker. dockerd[ 1475]: failed to start daemon: pid file found, ensure docker is not running or delete /var/snap/ docker/ 471/run/ docker. pid
Stopped the docker snap (snap stop docker) Deleted the stale pid, restarted docker (snap start docker) and all was well.