[Pkg-xen-devel] Bug#674161: [Xen-API] Bug#674161: xcp-xapi: 'the device disappeared from xenstore' message during vbd-plug (vm-start)

[George Shuklin]

On 23.05.2012 23:24, George Shuklin wrote:
> On 23.05.2012 22:44, Dave Scott wrote:
>> xenstore-write /local/domain/0/vm hello
>
> Yes, it plugged successfully (at least no error messages).
>
> I saw that code in  device.ml (where exception was raised), it seems 
> be checking that path in xenstore:
>
>                 (* Sanity check: ensure the backend domain exists *)
>                 let _ =
>                         try
>                                 let (_: string) = t.Xst.read (sprintf 
> "/local/domain/%d/vm" device.backend.domid) in
>                                 ()
>                         with Xenbus.Xb.Noent ->
>                                 raise (Device_backend_vanished device) in
>
>
> But even I was successfull, I unable to perform any IO in guest domain 
> (I've get into initrd but I see no /dev/xvd* devices and no messages 
> in dmesg related to new device).

I was wrong about this. Workaround 'xenstore-write /local/domain/0/vm 
something' works and new device is available in guest domain. There is a 
separate problem with networking I'll report separately.

Now but description is looking like this:

xcp-xapi package does not write dom0 uuid in xenstore upon startup. This 
prevents normal device initialization.