Re: [Xen-users] Xen shutdown fails to release DRBD device

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, Aug 22, 2018 at 03:24:24PM +0200, Valentin Vidic wrote:
> Hi,
> 
> Any idea why would Xen occasionally fail to release the block
> device on shutdown?
> 
> Aug 21 22:56:00 node1 root: /etc/xen/scripts/block-drbd: remove 
> XENBUS_PATH=backend/vbd/6/51712
> Aug 21 22:56:00 node1 kernel: [ 2222.278235] block drbd6: State change 
> failed: Device is held open by someone
> Aug 21 22:56:00 node1 kernel: [ 2222.278304] block drbd6:   state = { 
> cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate r----- }
> Aug 21 22:56:00 node1 kernel: [ 2222.278340] block drbd6:  wanted = { 
> cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate r----- }
> Aug 21 22:56:00 node1 root: /etc/xen/scripts/block-drbd: Writing 
> backend/vbd/6/51712/hotplug-error /etc/xen/scripts/block-drbd failed; error 
> detected. backend/vbd/6/51712/hotplug-status error to xenstore.
> Aug 21 22:56:00 node1 root: /etc/xen/scripts/block-drbd: 
> /etc/xen/scripts/block-drbd failed; error detected.
> 
> It seems like /etc/xen/scripts/block-drbd is called a bit too early just
> sometimes. This is Xen 4.8.4 with DRBD 8.9.10 from Debian stretch.

The hotplug scripts are called when the backend releases the devices
(ie: switches to state 6).

This seems to be an issue with the drbd state itself, and some kind of
primary/secondary change? (according to the log above).

The drdb hotplug script is not maintained by the Xen project, so I
would suggest you to contact the drbd project [0] in order to try to
figure out what's wrong.

Thanks, Roger.

[0]  http://lists.linbit.com/

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