9:51 a.m.
Hi there,
I have installed xen through yum. How can I start it? I started xend
via its init.d script but still xm info says that it cannot connect
xend. What should I do then?
- Gergely
9:54 a.m.
On Wed, Jan 11, 2012 at 1:51 PM, Gergely Buday <gbuday(a)gmail.com> wrote:
Hi there,
I have installed xen through yum. How can I start it? I started xend
via its init.d script but still xm info says that it cannot connect
xend. What should I do then?
- Gergely
--
what version of fedora / centos are you using ?
--
------------
Itamar Reis Peixoto
msn, google talk: itamar(a)ispbrasil.com.br
+55 11 4063 5033 (FIXO SP)
+55 34 9158 9329 (TIM)
+55 34 8806 3989 (OI)
+55 34 3221 8599 (FIXO MG)
10:02 a.m.
On Wed, Jan 11, 2012 at 2:00 PM, Gergely Buday <gbuday(a)gmail.com> wrote:
>> I have installed xen through yum. How can I start it? I
started xend
>> via its init.d script but still xm info says that it cannot connect
>> xend. What should I do then?
>
> what version of fedora / centos are you using ?
Fedora 15. On amd x64.
- Gergely
fedora 16 or newer have support for xen dom0
--
------------
Itamar Reis Peixoto
msn, google talk: itamar(a)ispbrasil.com.br
+55 11 4063 5033 (FIXO SP)
+55 34 9158 9329 (TIM)
+55 34 8806 3989 (OI)
+55 34 3221 8599 (FIXO MG)
10:07 a.m.
On Wed, Jan 11, 2012 at 2:04 PM, Gergely Buday <gbuday(a)gmail.com> wrote:
> fedora 16 or newer have support for xen dom0
Could you please elaborate this? What should I do on fedora 15?
- Gergely
in fedora 15 you should download xen sources and compile it yourself
if you want to have a dom0
--
------------
Itamar Reis Peixoto
msn, google talk: itamar(a)ispbrasil.com.br
+55 11 4063 5033 (FIXO SP)
+55 34 9158 9329 (TIM)
+55 34 8806 3989 (OI)
+55 34 3221 8599 (FIXO MG)
10:08 a.m.
On Wed, 11 Jan 2012, Itamar Reis Peixoto wrote:
On Wed, Jan 11, 2012 at 2:00 PM, Gergely Buday
<gbuday(a)gmail.com> wrote:
>>> I have installed xen through yum. How can I start it? I started xend
>>> via its init.d script but still xm info says that it cannot connect
>>> xend. What should I do then?
>>
>> what version of fedora / centos are you using ?
>
> Fedora 15. On amd x64.
>
> - Gergely
fedora 16 or newer have support for xen dom0
But it will work on F15 if you have a recent kernel update.
Michael Young
6:43 a.m.
But it will work on F15 if you have a recent kernel update.
Michael Young
The Xen manual says that I need something similar to this in grub.conf
(I have legacy grub):
title Xen 3.0 / XenLinux 2.6
kernel /boot/xen-3.0.gz dom0_mem=262144
module /boot/vmlinuz-2.6-xen0 root=/dev/sda4 ro console=tty0
What is not clear if I need a special kernel set as "module", or my
original vmlinuz-2.6.41.1-1.fc15.x86_64 would suffice? My working
setup is
title Fedora (2.6.41.1-1.fc15.x86_64)
root (hd0,0)
kernel /boot/vmlinuz-2.6.41.1-1.fc15.x86_64 ro
root=UUID=fbb9744f-0226-4665-b377-74522399f301 rd_NO_LUKS rd_NO_LVM
rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16
KEYTABLE=us nomodeset rhgb quiet nouveau.modeset=0 rdblacklist=nouveau
initrd /boot/initramfs-2.6.41.1-1.fc15.x86_64.img
I rewrote it to
title Fedora (XEN)
root (hd0,0)
kernel /boot/xen.gz dom0_mem=262144
module /boot/vmlinuz-2.6.41.1-1.fc15.x86_64 ro
root=UUID=fbb9744f-0226-4665-b377-74522399f301 rd_NO_LUKS rd_NO_LVM
rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16
KEYTABLE=us nomodeset rhgb quiet
initrd /boot/initramfs-2.6.41.1-1.fc15.x86_64.img
But then Grub said that a linux kernel should be loaded before initrd.
Yes I feel that this is more a Grub than a Fedora Xen question but I
hope somebody can answer here.
- Gergely
6:51 a.m.
On Thu, 12 Jan 2012, Gergely Buday wrote:
I rewrote it to
title Fedora (XEN)
root (hd0,0)
kernel /boot/xen.gz dom0_mem=262144
module /boot/vmlinuz-2.6.41.1-1.fc15.x86_64 ro
root=UUID=fbb9744f-0226-4665-b377-74522399f301 rd_NO_LUKS rd_NO_LVM
rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16
KEYTABLE=us nomodeset rhgb quiet
initrd /boot/initramfs-2.6.41.1-1.fc15.x86_64.img
The last line should be
module /boot/initramfs-2.6.41.1-1.fc15.x86_64.img
Michael Young
7:13 a.m.
On 12 January 2012 13:51, M A Young <m.a.young(a)durham.ac.uk> wrote:
On Thu, 12 Jan 2012, Gergely Buday wrote:
> title Fedora (XEN)
> root (hd0,0)
> kernel /boot/xen.gz dom0_mem=262144
> module /boot/vmlinuz-2.6.41.1-1.fc15.x86_64 ro
> root=UUID=fbb9744f-0226-4665-b377-74522399f301 rd_NO_LUKS rd_NO_LVM
> rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16
> KEYTABLE=us nomodeset rhgb quiet
> initrd /boot/initramfs-2.6.41.1-1.fc15.x86_64.img
The last line should be
module /boot/initramfs-2.6.41.1-1.fc15.x86_64.img
I used that, and it ended up in
---
Welcome to emergency mode. Use "systemctl default" or ^D to activate
default mode.
Give root password for maintenance.
(or type Ctrl-D to continue)
---
Once I tried ctrl-d, then nothing happened, giving the root password
took me to a "bash: command not found" message and a root prompt at
last, with no /home and /usr mounted.
Otherwise the booting process was that the Xen kernel booted first,
then the usual white and blue Fedora stripes grew. And at last I got
that message.
What logs should I check to see what went wrong? And, do you have any
idea what the problem is?
- Gergely
8:19 a.m.
>> kernel /boot/xen.gz dom0_mem=262144
This was the problem, 256M might have been enough at old times, but giving
kernel /boot/xen.gz dom0_mem=1048576
solved the problem. dmesg complained about
Cannot allocate memory
and this clue lead to the above fix.
Thanks for all who have responded and sorry for the noise.
- Gergely
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Gergely Buday -
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M A Young