On Tue, Jul 26, 2011 at 02:07:30AM -0400, Bill McGonigle wrote:
> Hi, all,
> 
> I'm not seeing disks under CentOS 6 when trying to install.  I'm using:
> 
>    xen-4.0.2-1.fc14.x86_64
>    2.6.32.39-175.xendom0.fc13.x86_64
> 
> installing using:
> 
> virt-install --debug -n sully --mac=02:00:0A:01:01:10 -f 
> /var/lib/xen/images/sully -s 12 -r 2048 --vcpus=2 --nographics -p 
> --os-type=linux --os-variant=rhel6 --location 
> http://librescu.bfccomputing.com/cobbler/ks_mirror/centos6-x86_64/
> 

Did you try using a phy: backend? ie. lvm volume or a block device? 


> It sounded like:
> 
>    https://bugzilla.redhat.com/show_bug.cgi?id=678374
> 
> so I tried dropping the --nonsparse option, but I'm using a newer 
> version of python-virtinstall:
> 
>    python-virtinst-0.500.6-1.fc14.noarch
> 
> than should be required, and I'm seeing this with and with the option 
> anyway.
> 
> I do see the disk image is created, and attached to the DomU.  e.g.:
> 
> [2011-07-26 01:01:47 18534] DEBUG (DevController:97) DevController: 
> writing {'domain': 'sully', 'frontend': 
> '/local/domain/18/device/vbd/51712', 'uuid': 
> '3380cea8-a322-292d-cc5d-8bb084306976', 'bootable': '1', 'dev': 'xvda', 
> 'state': '1', 'params': 'aio:/var/lib/xen/images/sully', 'mode': 'w', 
> 'online': '1', 'frontend-id': '18', 'type': 'tap'} to 
> /local/domain/0/backend/tap/18/51712.
> 
> and I can see the disk image if I dump configuration from virsh.
> 
> I do see this in the DomU kernel messages:
> 
>    XENBUS: Device with no driver: device/vbd/51712
>    XENBUS: Device with no driver: device/vif/0
>    XENBUS: Device with no driver: device/console/0
> 
> but I see reports online that say not to worry about those, initrd will 
> load the modules.
> 

Can you post the full domU kernel messages? probably with "console=hvc0 
earlyprintk=xen"

> The initrd does have:
> 
>    ./kernel/drivers/xen
>    ./kernel/drivers/xen/xenfs
>    ./kernel/drivers/net/xen-netfront.ko.gz
>    ./kernel/drivers/block/xen-blkfront.ko.gz
> 
> on it.
> 
> I tried adding:
> 
>    xen_emul_unplug=never
> 

xen_emul_unplug is only needed for HVM guests, not for PV.


> to the kernel parameters per a previous thread here, but that didn't 
> seem to change anything.
> 
> It seems like others are having success with CentOS 6 in general:
> 
>  
> http://grantmcwilliams.com/tech/virtualization/xen-howtos/538-centos-6-virtual-machine-64-bit-installation-on-xen
> 
> so I suspect it's got something to do with Xen 4.0.2, but I'm not sure 
> where to look right now.
> 
> Any suggestions?
> 

Did you see?:
http://wiki.xen.org/xenwiki/RHEL6Xen4Tutorial


-- Pasi


> -Bill
> 
> -- 
> Bill McGonigle, Owner
> BFC Computing, LLC
> http://bfccomputing.com/
> Telephone: +1.855.SW.LIBRE
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