On Fri, Jan 29, 2021 at 9:34 AM Adam Boyhan <adamb(a)medent.com> wrote:
This is a odd one. I don't hit it all the time so I don't think its expected
behavior.
Sometimes I have no issues enabling rbd-mirror snapshot mode on a rbd when its in use by
a KVM VM. Other times I hit the following error, the only way I can get around it is to
power down the KVM VM.
root@Ccscephtest1:~# rbd mirror image enable CephTestPool1/vm-101-disk-0 snapshot
2021-01-29T09:29:07.875-0500 7f1e99ffb700 -1
librbd::mirror::snapshot::CreatePrimaryRequest: 0x7f1e7c012440 handle_create_snapshot:
failed to create mirror snapshot: (22) Invalid argument
2021-01-29T09:29:07.875-0500 7f1e99ffb700 -1 librbd::mirror::EnableRequest:
0x5597667fd200 handle_create_primary_snapshot: failed to create initial primary snapshot:
(22) Invalid argument
2021-01-29T09:29:07.875-0500 7f1ea559f3c0 -1 librbd::api::Mirror: image_enable: cannot
enable mirroring: (22) Invalid argument
I suspect that you have the exclusive-lock feature enabled and the
QEMU hypervisor host has a pre-octopus version of librbd.
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--
Jason