Xen project Mailing List

On 17 May 2010 23:24, Nuno L. Ferreira <nunolf@xxxxxxxxx> wrote:

Dear *, Boris

I tried to follow your steps (installing Lucid x86_64 PV domU on a CentOS 54 x86_64 dom0, running xen 3.4.2 from gitco) ... but was not successful. Something is still escaping me.
Installation went just fine till the end after a "xm create -c lucid.xen" (see below).
After installation (without any modifications to what was installed) I edited the xen config file (test.xen, see below) to boot with pygrub instead. But I get the following error:
Error: Boot loader didn't return any data!

I checked that the new domU does not have /usr/bin/pygrub, and this explains the error.
So Boris, how did you boot your ubunto based domU after a netboot installation?
I did not tried yet the debootstrap method also suggested ... first I want to know what I'm doing wrong here.

I'm a bit lost on setting up an ubunto domU, first time getting outside RedHat like OSes. So if there are some good working links to blogs/tutorials on how to install ubunto domU's on RedHat like dom0's I'll appreciate.

Cheers,
N.

P.S. Steps taken :

1 - lvcreate -n domu.ubunto.lucid -L 4G vg1
2 - mkfs.ext3 /dev/vg1/domu.ubunto.lucid
3 - wget http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/xen/vmlinuz
4 - wget http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/xen/initrd.gz
5 - cat lucid.xen
name = "lucid"
memory = 1024
disk = ['phy:/dev/vg1/domu.ubunto.lucid,xvda,w' ]
vif = [ 'bridge=eth0' ]
kernel = "/mnt/dom0/data/domu.setup/ubunto/lucid/vmlinuz"
ramdisk = "/mnt/dom0/data/domu.setup/ubunto/lucid/initrd.gz"
vcpus = 1
> on_crash = 'destroy'

6 - xm create -c lucid.xen
... installation goes just fine ...
7 - cat test.xen
name = "test"
memory = 512
maxmem = 1024
bootloader = '/usr/bin/pygrub'
disk = ['phy:/dev/vg1/domu.spyder.root,xvda,w' ]
vif = [ 'bridge=eth0' ]
vcpus = 1
class="im">
on_reboot = 'restart'
on_crash = 'restart'

8 - xm create -c test.xen
Using config file "./test.xen".
Error: Boot loader didn't return any data!

Boris Derzhavets wrote:

I was able to start installer :

root@ServerLnx:/home/boris/ubuntu# wget http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/xen/vmlinuz
--2010-05-13 12:36:14-- http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/xen/vmlinuz
Resolving archive.ubuntu.com... 91.189.92.167, 91.189.88.30, 91.189.88.31, ...
Connecting to archive.ubuntu.com|91.189.92.167|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 4037888 (3.9M) [text/plain]
Saving to: `vmlinuz'

100%[========================================================================>] 4,037,888 101K/s in 27s
2010-05-13 12:36:41 (144 KB/s) - `vmlinuz' saved [4037888/4037888]

root@ServerLnx:/home/boris/ubuntu# wget http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/xen/initrd.gz
--2010-05-13 12:37:02-- http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/xen/initrd.gz
Resolving archive.ubuntu.com... 91.189.92.166, 91.189.92.167, 91.189.88.30, ...
Connecting to archive.ubuntu.com|91.189.92.166|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9678415 (9.2M) [application/x-gzip]
Saving to: `initrd.gz'

100%[========================================================================>] 9,678,415 200K/s in 60s
2010-05-13 12:38:03 (156 KB/s) - `initrd.gz' saved [9678415/9678415]

root@ServerLnx:/home/boris/ubuntu# cat ubuntu.cfg
name="U10PV"
memory=2048
disk = ['phy:/dev/sdb5,xvda,w' ]
vif = [ 'bridge=eth0' ]
# vfb = [ 'type=vnc,vncunused=1']
kernel = "/home/boris/ubuntu/vmlinuz"
ramdisk = "/home/boris/ubuntu/initrd.gz"
vcpus=2
> >
# xm create -c ubuntu.cfg

and see several obvious disadvantages (vs HVM convertion) :

1. VFB doesn't work
2. After selecting local mirror "Installing base system" is already running for 15 min
at 2MB/sec ADSL connection.

Boris.

Re: [Xen-users] Install ubunto domU