[SOLVED] Howto install an Ubuntu server as a virtual server on a Cent OS 5.6 host.

ThomasRonshof · 06-03-2011, 05:35 AM

Is it possible ?

I've tried to install it as fully virtualized, but alot of errors occurs during installation.

Using para-virtualization wont even start the installation. Errors on media contents, something like that.

I'm using Ubuntu server 10.04 LTS.
Trying to install on a CentOS 5.6.

Regards.

acid_kewpie · 06-03-2011, 06:05 AM

if you have errors, why are you not telling us what they are? We aren't psychic. Start again with fully virtualized installation and provide us with useful information if it doesn't work.

dyasny · 06-04-2011, 06:16 AM

sounds like you're using Xen

acid_kewpie · 06-04-2011, 06:23 AM

Sounds more like Qemu/KVM to me. 5.6 doesn't use Xen by default (if at all??)

dyasny · 06-04-2011, 12:43 PM

para-virtualization, under kvm?

centos 5.x has xen in it

acid_kewpie · 06-04-2011, 01:34 PM

Well in reality it's neither is it... it's libvirt / virtmanager / qemu with whatever it's aware of underneath it...

dyasny · 06-04-2011, 02:43 PM

paravirtualization, as such, is NEVER mentioned in virt-manager, unless you use xen

acid_kewpie · 06-05-2011, 02:27 AM

Quote:

Originally Posted by dyasny

paravirtualization, as such, is NEVER mentioned in virt-manager, unless you use xen

Yeah sorry, not thinking.

Skaperen · 06-06-2011, 10:32 AM

10.04.2 LTS boots and installs fine under qemu-kvm for me. But then, the host is 10.04.2 LTS, too (but really, that should not matter). I've done that for all Ubuntus from 11.04 back to 9.04, plus 8.04.4 LTS. I've built a suite of pre-installed HD images for Fedora (just 15 for now), Slackware (back to 10.0) and Ubuntu ... so I have them ready for quick bootups for testing stuff for regression (to see if something broken in the latest version ever worked in an earlier version).

Maybe your ISO file is a bad download? Exactly which one did you download (exact name of ISO file as it was on the source server)? How many bytes do you have in it? What is its md5 checksum?

Also, which virtualization engine(s) is/are involved?

ThomasRonshof · 06-07-2011, 01:28 AM

Hi,

I've tried some things now and the conclusion is that ONLY 32 bit versions works. Ubuntu 10.10 32 bit server and 11.04 32 bit server. It's slow, but it gets installed. The 64 bit version gets alot of errors during install.

I use xen under Cent OS 5.6 64 bit.

I have only 2 GB ram in this testserver, and only allocate 1 GB ram for the virtual guests. Is that maybe the problem ?`

Regards.

dyasny · 06-07-2011, 01:58 AM

does your server have VT extensions?

ThomasRonshof · 06-07-2011, 02:05 AM

Yes :-)

ThomasRonshof · 06-07-2011, 02:15 AM

From RH5 Virtualization guide, I do: cat /proc/cpuinfo | grep vmx. This gives me output lines with vmx.

xm dmesg | grep VMX

gives me:

(XEN): HVM: VMX enabled
(XEN): VMX: MSR intercept bitmap enabled

acid_kewpie · 06-07-2011, 04:52 AM

You've still not said what the errors actually are...

ThomasRonshof · 06-07-2011, 05:29 AM

I just upgraded the server with 2 Gb ram, so there's total 4 Gb of ram.

Still problems with 64 bit install media. The media's are ok. Works on a standalone server, normal install!

1 error is that it looses tcp/ip connection during installation... another is that it couldn't find a network card...

I will try again later... takes time everytime.

there's no problem installing Cent OS as the guest... only Ubuntu... :-(