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xen-users
Re: [Xen-users] Grub does not load Xen
Andrey Chursin wrote:
Hello
I have installed XEN on CentOS using
yum install xen
But when in grub menu i choosing 'Centos with xen' it do not boot.
I see next screen:
http://img201.imageshack.us/my.php?image=xentroublerc9.jpg and then
nothing occurs. After some time(~30 secs) system automatically reboot
This is grub's menu.lst file:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
console=ttyS0,57600 console=tty0
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/sda3
console=ttyS0,57600 console=tty0
# initrd /initrd-version.img
#boot=/dev/sda
serial --unit=0 --speed=57600
terminal --timeout=2 serial console
default=1
timeout=5
hiddenmenu
tittle CentOS (2.6.18-92.1.18.el5xen)
root (hd0,0)
kernel /xen.gz-2.6.18-92.1.18.el5
module /vmlinuz-2.6.18-92.1.18.el5xen ro root=LABEL=/ acpi=off
noapic nodmraid console=ttyS0,57600 console=tty0
module /initrd-2.6.18-92.1.18.el5xen.img
title CentOS (2.6.18-92.1.18.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-92.1.18.el5 ro root=LABEL=/ acpi=off
noapic nodmraid console=ttyS0,57600 console=tty0
initrd /initrd-2.6.18-92.1.18.el5.img
title CentOS (2.6.18-92.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-92.el5 ro root=LABEL=/ acpi=off noapic
nodmraid console=ttyS0,57600 console=tty0
initrd /initrd-2.6.18-92.el5.img
Choosing second option boot linux, but without xen. Choosing first
option makes screen i provided above.
Thank you for your attention.
Just out of curiosity, does the machine still boot? Do you see console
output on the vga/local console? From looking at the options, it appears
that you are trying to use both a serial and vga consoles. I fought with
doing a serial console and xen for a while. What I was able to figure
out is that defining the console settings on the line for the xen kernel
and then not doing any console settings on the linux kernel works. Here
is an example from one of my xen boxes.
title Xen 3.2-1-amd64 / Debian GNU/Linux, kernel 2.6.18-6-xen-amd64 serial
root (hd0,0)
kernel /boot/xen-3.2-1-amd64.gz dom0_mem=786432 console=com2,vga
com2=115200,8n1
module /boot/vmlinuz-2.6.18-6-xen-amd64 root=/dev/hda1 ro
pciback.permissive pciback.hide=(00:02.1)
module /boot/initrd.img-2.6.18-6-xen-amd64
This is for a Debian box and I also limit the size of the dom0 memory.
But something similar should work for you on CentOS. The important parts
for you would be the 'console=com2,vga com2=115200,8n1' and then no
console definition on the linux kernel line. It looks like you are using
com1 instead of com2 so change the settings to match what you want.
Hope that helps.
Mike
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