Re: [Xen-users] how to use prebuilt images from jailtime.org?

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Nico Kadel-Garcia wrote:
> Rudi Ahlers wrote:
> > Hi
> >
> > Does anyone know how to use the images from http://www.jailtime.org/? 
> > I've downloaded the CentOS 5.1 
> > (http://www.jailtime.org/download:centos:v5.1) to my CentOS 5.1 x64 
> > Xen 3.1 server, and unpacked it to my /home folder.
> > Then I took the included config file, centos.5-1.xen3.cfg and copied 
> > it to /xen - and modified to my needs:
> > [root@gimbli home]# more /etc/xen/centos5-1
> > kernel = "/boot/vmlinuz-2.6.18-53.1.13.el5xen"
> > memory = 256
> > name = "centos5-1"
> > vif = [ '' ]
> > dhcp = "dhcp"
> > #disk = ['file:/home/vm/centos.5-1.img,sda1,w', 
> > 'file:/home/centos.swap,sda2,w']
> > #root = "/dev/xvda1 ro"
> >
> > disk = [ "tap:aio:/home/vm/centos.5-1.img,xvda,w" ]
> > root = "/dev/xvda ro"
> >
> >
> > Yet, when I try and use it, I get the following error:
> > VFS: Cannot open root device "xvda" or unknown-block(0,0)
> > Please append a correct "root=" boot option
> > Kernel panic - not syncing: VFS: Unable to mount root fs on 
> > unknown-block(0,0)
> I gave up on the jailtime images a while ago: they're useful, but I 
> find a fast virt-install to be similarly useful and to cooperate with 
> the CentOS/RHEL ideas about where things go. In particular, the 
> /etc/fstab of the Jailtime image expects partitions to be on /dev/sda, 
> while the current Xen installers and kernels put them in /dev/xvda.
> Check the /etc/fstab of your image (which should be mountable with 
> kpartx and loopback mounts, and look at its /etc/fstab. Or simply 
> mount the partitions as /dev/sda the same way that the Jailtime author 
> did.
> _______________________________________________
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> http://lists.xensource.com/xen-users
That didn't work, I've tried it already. Changing the /dev/sda1 line in 
/mnt/centos5.1/etc/fstab (image mounted with look device) to /dev/xvda1 
gave me the same error, except for pointing to a different block device.
Looking at /mnt/centos5.1/dev - there is no xvdX devices, so this is a 
problem.
--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other 
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