After removing Docker via GUI I found that it did not get completely removed. So I attempted to remove it via commandline, without success.
Docker sticks around after: apt-get purge openmediavault-docker-gui
Is this an issue with Docker?
How do I cleanly remove Docker plugin?
Perhaps it is a 4.1.0-1 (Arrakis) Linux 4.14.0-0.bpo.3-amd64 issue.
root@OMVi3:~# apt-get purge openmediavault-docker-gui
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
0 upgraded, 0 newly installed, 1 to remove and 1 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 44483 files and directories currently installed.)
Purging configuration files for openmediavault-docker-gui (4.0.1) ...
Failed to start docker.service: Unit docker.service not found.
dpkg: error processing package openmediavault-docker-gui (--purge):
subprocess installed post-removal script returned error exit status 5
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)