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Re: [Xen-users] Hotplug scripts not working

To: Tom De Vylder <tom@xxxxxxxxxxx>
Subject: Re: [Xen-users] Hotplug scripts not working
From: Mark Pryor <tlviewer@xxxxxxxxx>
Date: Tue, 31 May 2011 18:19:56 -0700 (PDT)
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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--- On Tue, 5/31/11, Tom De Vylder <tom@xxxxxxxxxxx> wrote:

> From: Tom De Vylder <tom@xxxxxxxxxxx>
> Subject: [Xen-users] Hotplug scripts not working
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Date: Tuesday, May 31, 2011, 5:44 AM
> Hi all,
> I'd like to know if it's possible to have more verbose
> output when running a block-prefix script. Other than
> xend.log.
> To be more specific I'd like to use bash -x to see why I'm
> running into the following error:
> > # xm create -c host.cfg
> > Using config file "host.cfg".
> > aa:bb:cc:dd:ee:ff
> > Error: Device 51712 (vbd) could not be connected.
> Hotplug scripts not working.
> However xm seems to disregard any output from the
> block-prefix script.
> xend.log hangs a few minutes on the following lines:
> > [2011-05-31 14:28:41 1894] DEBUG (XendDomainInfo:1286)
> XendDomainInfo.destroyDevice: deviceClass = vbd, device =
> vbd/51712
> > [2011-05-31 14:28:41 1894] DEBUG (DevController:628)
> hotplugStatusCallback
> /local/domain/0/backend/vbd/55/51712/hotplug-status.
> > [2011-05-31 14:28:41 1894] DEBUG (DevController:628)
> hotplugStatusCallback
> /local/domain/0/backend/vbd/55/51712/hotplug-status.
> ... and then dies, removes the vif devices and spawns the
> "hotplug scripts not working" errors.

Main reason for the above error on xen 4.0+ is missing the 1 or 2 drivers from 
ls /dev/xen

If you built from source (please post `xm info`) the configs are


also double check that below is populated

if its not, there is no xenfs mount -- another common error.


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