Fix docker volume plugin fentas/davfs:latest restart issue

[genzj]

Problem

After host rebooting, davfs volumes cannot be mounted.

Reason

Stale PID file isn't cleaned, causing plugin daemon starting error.

Solution

Manually remove previous PID file by:

plugin_id="$(docker plugin inspect -f '{{.Id}}' fentas/davfs:latest)"
echo $plugin_id
sudo ls -al "/var/lib/docker/plugins/${plugin_id}/rootfs/run/mount.davfs/"

PID files are named after mnt-volumes-<volume-id>.pid. Double confirm and remove stale PID files.