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[openstack-operators] RBD problems after data center power outage


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 �elik <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 */