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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