Latest version of Collabora Online Docker container doesn't work with Docker CE 18.06.1
See the issue here:
To get a list of available docker-ce
versions:
apt-cache madison docker-ce
Stop Docker and downgrade and restart:
service docker stop
apt-get install docker-ce=18.06.0~ce~3-0~debian
apt-mark hold docker-ce
service docker restart
Then Collabora Online starts working again.
When there is a version of the Collabora Online Docker container that does work with overlay2 then run the following command to allow it to be upgraded:
apt-mark unhold docker-ce
Edited by Chris Croome