Please have a careful look at the docs, in particular:
- troubleshooting: Docker Volume Plugin
- managed plugin options: Docker Volume Plugin
Restart your plugin with higher verbosity:
docker plugin disable rclone # just to be sure, probably unneeded
docker plugin set rclone args="-vv" # bump up verbosity
docker plugin enable rclone # this will fail :( but also report in the log :)
The docker plugin log goes into the docker daemon log which is located OS dependent:
/var/log/syslog
/var/log/messages
/var/log/docker.log
journalctl --unit docker
Find the last few log messages for rclone plugin and paste below for analysis.