Is it possible to use VDO on Kubernetes(with Docker containers)?
As far as I know, block devices are mountable - the problem here(I think) would be loading the VDO modules into the Docker container. I assume it's not possible to do it within the Docker container, so the responsibility lies on the host.
Correct, it's not directly supported by Kubernetes but you can always manage your VDO modules and volumes at the host level. For example, mount the volumes under /mnt/vdo0 and then use them in a container with the HostPath volume option.
You can also, for example, specify a VDO volume as the main graph directory for your docker daemon with something like /usr/bin/dockerd -g /mnt/vdo0 That will make your images and your non-external volume container storage stored in that directory.