Ephemeral Volume support

[majst01]

Some use cases require more scratch filesystem space for the application than available via emptydir.
For these type of applications, kubernetes support since 1.16 Ephemeral Volumes:

• https://kubernetes.io/blog/2020/01/21/csi-ephemeral-inline-volumes/
• https://kubernetes-csi.github.io/docs/ephemeral-local-volumes.html

csi-driver-host-path does support this: https://github.com/kubernetes-csi/csi-driver-host-path/blob/master/docs/example-ephemeral.md

From reading our code, this seems to be supported as well, but testing it and collecting the required steps in a example-ephemeral.md would be required.

[mwennrich]

Example: https://github.com/metal-stack/csi-driver-lvm/blob/master/examples/csi-app-inline.yaml
Integration-tested here: https://github.com/metal-stack/csi-driver-lvm/blob/master/tests/bats/test.bats#L15

[majst01]

Ha, i should have had a closer look, fantastic !