[PVE-User] Error deleting Ceph volume from KVM virtual machine

Eneko Lacunza elacunza at binovo.es
Tue May 20 08:54:57 CEST 2014


Yes this is really interesting; what O.S.'s suppot it? It would be nice 
to be able to activate it from GUI...

On 19/05/14 21:08, Gilberto Nunes wrote:
> wow nice feature.. I don't knew about this hotplug feature...
> Thanks in advance
>
>
> 2014-05-19 15:59 GMT-03:00 Alexandre DERUMIER <aderumier at odiso.com 
> <mailto:aderumier at odiso.com>>:
>
>     >>You should always stop a VM to effectively remove a hard disk:
>     the running VM doesn't free it until it is stopped. You can make
>     changes in configured harddisks in PVE GUI but they won't be
>     activated until next >>stop/start (reboot doesn't work AFAIK).
>
>     you can add hotplug:1 to vm config file, to enable live
>     hotplug/unplug (disk,net)
>
>     ----- Mail original -----
>
>     De: "Eneko Lacunza" <elacunza at binovo.es <mailto:elacunza at binovo.es>>
>     À: pve-user at pve.proxmox.com <mailto:pve-user at pve.proxmox.com>
>     Envoyé: Dimanche 18 Mai 2014 21:15:36
>     Objet: Re: [PVE-User] Error deleting Ceph volume from KVM virtual
>     machine
>
>
>     Hi Greg,
>
>     You should always stop a VM to effectively remove a hard disk: the
>     running VM doesn't free it until it is stopped. You can make
>     changes in configured harddisks in PVE GUI but they won't be
>     activated until next stop/start (reboot doesn't work AFAIK).
>
>     That said, the remove error could be because of a timeout deleting
>     the somewhat big disk.
>
>     Cheers
>     Eneko
>
>     On 17/05/14 00:44, Greg Poirier wrote:
>
>
>
>     I have a 1TB RBD volume attached to a KVM virtual machine.
>     Removing the volume from this machine was somewhat problematic.
>
>
>     While the machine is running:
>
>
>     I selected the disk and clicked Remove. This cause the disk to
>     appear as 'unused0' which mapped to the Ceph RBD volume.
>
>
>     I then highlighted 'unused0' and clicked Remove again.
>
>
>     I got three errors:
>     One was a timeout error attempting to get flock the VM's lock file
>     (/var/lock/qemu-server/lock-400.conf).
>     Another was a connection timeout error.
>     Another was an internal server error.
>
>
>     I was unable to find any logs specifying the exact nature of any
>     of these errors. pvedaemon and pveproxy both simply logged the
>     request.
>
>
>     I tried deleting the disk from Ceph directly which is when I
>     discovered the watcher on the rbd_header object. I verified that
>     it was the KVM process that held the lock on the RBD volume and
>     shutdown the VM.
>
>
>     While the machine is not running:
>
>
>     After selecting the 'unused0' disk and clicking Remove the web
>     interface froze for some time, and then finally came back with an
>     Internal Server Error.
>
>
>     The volume was no longer present in the web interface, and I
>     confirmed both that the volume was no longer listed in rbd -p
>     volumes ls -- as well as inspecting attempting to inspect all of
>     the objects that used to make up the volume (rbd.stat returned an
>     exception saying that the file wasn't found--confirming the
>     volume's completed deletion).
>
>
>     I am running PVE 3.1-24/060bd5a6 with the 2.6.32 kernel.
>
>
>     Is this a known issue? Has this been fixed in later versions of
>     Proxmox? Should I file a new bug? Is there any additional
>     information I should attempt to gather before filing?
>
>
>     Thanks!
>
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>
>
>     --
>     Zuzendari Teknikoa / Director Técnico
>     Binovo IT Human Project, S.L.
>     Telf. 943575997
>           943493611
>     Astigarraga bidea 2, planta 6 dcha., ofi. 3-2; 20180 Oiartzun
>     (Gipuzkoa) www.binovo.es <http://www.binovo.es>
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>
>
>
> -- 
> Gilberto Ferreira


-- 
Zuzendari Teknikoa / Director Técnico
Binovo IT Human Project, S.L.
Telf. 943575997
       943493611
Astigarraga bidea 2, planta 6 dcha., ofi. 3-2; 20180 Oiartzun (Gipuzkoa)
www.binovo.es

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