Re: [Xen-users] Problems booting domU from lvm with multiple LV's

[Jai <awayatm@xxxxxxxxx>]

Sometimes all it takes is the act of trying to explain it to an email  
to understand the problem.... Turns out I had incorrect entries in / 
etc/fstab vs the xvd? in the  domU image. It now boots as expected.
I thank you for your response.

Cheers,
Jai

On 23/07/2008, at 6:47 PM, Stephan Seitz wrote:

> Hi,
>
> could you send your domU config please?
>
> I assume the disk entry is garbled. If your vg is named LVM and your
> lv's are named LV1 and LV2 this line reads e.g.
>
> disk = [ 'phy:/dev/LVM/LV1,xvda1,rw','phy:/dev/LVM/LV2,xvda2,rw' ]
>
> cheers
>
> Stephan
>
>
> Jai schrieb:
> > Hi,
> > I'm having difficulty understanding why my domU image will not  
> > boot if there are more than 1 disk device from the same LVM volume  
> > group allocated to a domU.
> > For example:
> > The basic diagram below tries to show how my disk stacking is setup.
> > ------------------------
> > |       /       |  /usr     |
> > ------------------------
> > |          domU         |
> > ------------------------
> > |   xvda1 |  xvda2 |
> > ------------------------
> > |   LV1     |   LV2   |
> > ------------------------
> > |            LVM          |
> > ------------------------
> > |      /dev/drbd0     |
> > ------------------------
> > |       /dev/sda1      |
> > ------------------------
> > For some reason creating a domU in this configuration results in a  
> > message;
> > "Error: Device 51729 (vbd) could not be connected. Hotplug scripts  
> > not working. "
> > in the logs there are entries with;
> > "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception  
> > looking up device number for xvda1: [Errno 2] No such file or  
> > directory: \047/dev/xvda1\047"
> > "[2008-07-23 14:51:58 xend 8058] DEBUG (blkif:24) exception  
> > looking up device number for xvda2: [Errno 2] No such file or  
> > directory: \047/dev/xvda2\047"
> > But if I boot a domU with only 1 logical volume assigned to the  
> > domU (see diagram below) the VM boots without problems.
> > -------------
> > |        /       |
> > -------------
> > |   domU  |
> > -------------
> > |   xvda    |
> > -------------
> > |   LV1     |
> > ------------------------
> > |            LVM          |
> > ------------------------
> > |      /dev/drbd0     |
> > ------------------------
> > |       /dev/sda1      |
> > ------------------------
> > I have trolled the net looking for some answers but none seem to  
> > provide one. Any help on what may be the cause would be greatly  
> > appreciated. I can provide config examples if that will help, but  
> > at this stage I'm thinking it may be a bug and not wrong  
> > configuration. I may be wrong though :)
> > Thanks.
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
>
> --
> Stephan Seitz
> Senior System Administrator
>
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