On 18 May 2008 at 18:32, gildo.rex@gmx.de wrote:
Hi Andrew,
Do I get this right, that I cannot install a paravirtualized guest from the CD, but I can install a Xen-Server from the CD?
That may be the case (I'm not certain of the detailed technicalities), but I do know that although I have performed 1-CD installs and then installed the xen kernel, any installations of virtual machines needed to be performed using the DVD media. The good news is that it doesn't need to be burnt to disk first! It's fine to just point the installer to the DVD ISO image saved somewhere on the local filesystem.
Your hint made my saturday!!! The installation worked and the VMs are performing well
(better than VMware). Many thanks!
I'm glad it worked for you.
I have got one more challenge to master:
As I'm doing clustertest I'm installing the VMs on one host and test them on this host. The
next step is to spread the VMs across to hosts. So I need to migrate on of the DomUs. With VMware I simply copied the VM to the other physical node and started it. I tried the same with the DomU and copied the configfile as well as the Diskfile.
When I try to start the DomU on the other node, I get the error message:
mpiphysicaltest2:~ # /usr/sbin/xm create /etc/xen/vm/test2 -c Using config file "/etc/xen/vm/test2". Error: (2, 'Invalid kernel', 'xc_dom_compat_check: guest type xen-3.0-x86_32 not supported
by xen kernel, sorry\n')
I checked the kernel via 'uname':
stephan@mpiphysicaltest1:~> uname -a Linux mpiphysicaltest1 2.6.22.17-0.1-xen #1 SMP 2008/02/10 20:01:04 UTC i686 i686 i386 GNU/Linux stephan@mpiphysicaltest1:~> uname -r 2.6.22.17-0.1-xen
stephan@mpiphysicaltest2:/usr/lib/xen/boot> uname -a Linux mpiphysicaltest2 2.6.22.17-0.1-xenpae #1 SMP 2008/02/10 20:01:04 UTC i686 i686 i386 GNU/Linux stephan@mpiphysicaltest2:/usr/lib/xen/boot> uname -r 2.6.22.17-0.1-xenpae
On the second node (target node), the kernel seems to have a PAE-extension. Might that hinder the migration? I don't know where it derives from - I installed both kernel from the same CD from scratch...
How can I harmonize this??
I'm only just beginning to investigate migrating Xen VMs from machine to machine - I intend doing it with shared storage (iSCSI) and the xm migrate command. However, I haven't got a live system yet, so I can't speak with any authority on this. I think that the problem that you're seeing is due to the two machines running slightly different kernels. One is a Xen-PAE kernel and one is a plain Xen kernel. PAE is Physical Address Extension (support for large memory configuarations on older 32bit hardware) You may find some of the documentation at http://www.cl.cam.ac.uk/research/srg/netos/xen/readmes/user/user.html is informative. I guess that the PAE machine has more than 4GB RAM (one of my test / development boxes is like this). If the second machine can load a PAE kernel, it should be OK. I hope that helps Andrew -- Andrew Foulsham IT Support Officer, Weatherall Institute of Molecular Medicine andrew.foulsham@imm.ox.ac.uk "If you want something done well - leave it in the microwave overnight!" -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-virtual+help@opensuse.org