[ovirt-users] disaster recovery

[mots]

Let me get this straight:

You added a new host and instead of letting VDSM manage the VM storage you added it manually, completely independent from oVirt, during an unattended installation of the host OS? In a production environment?

Why?
 
-----Ursprüngliche Nachricht-----
> Von:Nathanaël Blanchet <blanchet at abes.fr>
> Gesendet: Fre 19 Juni 2015 14:09
> An: users at ovirt.org
> Betreff: [ovirt-users] disaster recovery
> 
> Hello all,
> 
> Here is what can happen as a nightmare for a sysadmin:
> 
> I installed a new host to my pool of pre existing ovirt hosts with a 
> kickstart file and a default partitionning. I used to do this with vms 
> that usually get one local disk.
> But..
> This time this host was attached to several existing ovirt (production) 
> lun and anaconda gathered all existing disk (local and lun) into the 
> same VG (lv_home) et formatted them with XFS....
> In the webadmin, the domain storage became unvailaible, vms were still 
> up (thankgoodness), but it was impossible to interact with them. If I 
> stopped them, it was impossible to reboot them. If I launch lvs command, 
> some hosts can still see the ovirt LV, but other see only the lv_home 
> while /dev/[idofvms] are still present.
> So it was my chance that vms were still present, and I began to export 
> them with a tar at file system level so as to import them in a new 
> domain storage.
> 
> It seems that data are still present because the vms are still running.
> So my question is really : instead of this difficult export step, is 
> there a way to recover the initial format of the ovirt lun so as to make 
> the lvm index come back on the disk?
> 
> Any help or disaster experience would be much appreciated.
> 
> -- 
> Nathanaël Blanchet
> 
> Supervision réseau
> Pôle Infrastrutures Informatiques
> 227 avenue Professeur-Jean-Louis-Viala
> 34193 MONTPELLIER CEDEX 5 	
> Tél. 33 (0)4 67 54 84 55
> Fax  33 (0)4 67 54 84 14
> blanchet at abes.fr  
> 
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> 
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