Add support for CephFS.

Ceph Filesystem needs `ceph` as a kernel module.
This image was tested in a GCE VM in a GEC cluster running a Ceph cluster,
deploying a RWX volume against the Ceph storageclass,
and pods to read and write to that volume.

BUG=b/180447276
TEST=sponge/3687f206-d72e-4aff-91ec-750b141aac49
RELEASE_NOTE=Added support for Ceph.

Change-Id: Ia0e232e63d254d343f5c534a14327c6af2a4240e
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/23650
Reviewed-by: Harsh Modi <harshmodi@google.com>
Reviewed-by: Roy Yang <royyang@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
2 files changed