That makes sense. Appreciate it. From: "Jason Dillaman" <jdillama@redhat.com> To: "adamb" <adamb@medent.com> Cc: "ceph-users" <ceph-users@ceph.io> Sent: Friday, January 29, 2021 9:39:28 AM Subject: Re: [ceph-users] Unable to enable RBD-Mirror Snapshot on image when VM is using RBD On Fri, Jan 29, 2021 at 9:34 AM Adam Boyhan <adamb@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