If I have an rbd image that is being used by a VM and I want to mount it
as a read-only /dev/rbd0 kernel device, is that possible?
When I try it I get:
mount: /dev/rbd0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/rbd0,
missing codepage or helper program, or other error
The rbd image when viewed from the VM has a /dev/vda disk with 2 partitions
Number Start End Size Type File system Flags
1 1049kB 525MB 524MB primary xfs boot
2 525MB 12.9GB 12.4GB primary lvm
I wanted to view it thru the /dev/rbd0 mount because on one of my systems,
the VM is not booting from the image.
-- Tom
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