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Hi Eugen,

I think this is not the same situation with I’m facing because I can get rbd headers.

Regards

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> On 18 Oct 2019, at 09:44, Eugen Block <eblock at nde.ag> wrote:
> 
> Hi,
> 
> I've recently found this post [1] to recover a failing header, but I haven't tried it myself. I'm curios if it works though.
> 
> Regards,
> Eugen
> 
> https://fnordahl.com/2017/04/17/ceph-rbd-volume-header-recovery/
> 
> 
> Zitat von Dinçer Çelik <hello at dincercelik.com>:
> 
>> Greetings,
>> 
>> Today I had a data center power outage, and the OpenStack cluster went down. After taking the cluster up again, I cannot start some VMs due to error below. I've tried "rbd object-map rebuild" but it didn't work. What's the proper way to re-create the missing "_disk.config" files?
>> 
>> Thanks.
>> 
>> [instance: c2b54eac-179b-4907-9d61-8e075edc21cf] Failed to start libvirt guest: libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor: 2019-10-17T23:19:41.103720Z qemu-system-x86_64: -drive file=rbd:vms/c2b54eac-179b-4907-9d61-8e075edc21cf_disk.config:id=nova:auth_supported=cephx\;none:mon_host=10.250.129.10\:6789\;10.250.129.11\:6789\;10.250.129.12\:6789\;10.250.129.15\:6789,file.password-secret=ide0-0-0-secret0,format=raw,if=none,id=drive-ide0-0-0,readonly=on,cache=writeback,discard=unmap: error reading header from c2b54eac-179b-4907-9d61-8e075edc21cf_disk.config: No such file or directory
>> 
>> /* Please encrypt every message you can. Privacy is your right, don't let anyone take it from you. */
>> 
>> /* My fingerprint is: 5E50 ABB0 F108 24DA 10CC  BD43 D2AE DD2A 7893 0EAA */
> 
> 
> 
> 

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