I managed to configure Ceph's RDB on OpenMediaVault. Could format /dev/rbd0 and mount from command line without any issues.
Since it is a new type of device, OpenMediaVault doesn't recognize and have to add a new Class in /usr/share/php/openmediavault/system.inc file. Post that could see the device in "Physical Disks" section. While creating filesystem, it initializes then the line disappears.
I can see the partition created in /proc/partitions:
/dev/rbd0
/dev/rbd0p1
Anyone tried to configure Ceph's RDB on OpenMediaAgent and succeeded? Why creating fileystem fails?