On 4/19/07, Emre ERALTAN <eeraltan@xxxxxxxxx> wrote:

Hi,

I am a newbie using RHEL 5 with Xen 3.0.3-25.el5 (integrated in this version of RHEL). So, I have included the Xen package when I installed RHEL and then I installed the kernel-xen component which has created in my boot directory 4 files : vmlinuz-2.6.18-8.el5xen, initrd-2.6.18-8.el5xen.img, config-2.6.18-8.el5xen and xen.gz-2.6.18-8.el5. I have also now 2 boot options in my grub.conf :


title Red Hat Enterprise Linux Server (2.6.18-8.el5xen)
root (hd0,0)
kernel /xen.gz-2.6.18-8.el5
module /vmlinuz-2.6.18-8.el5xen ro root=LABEL=/ console=ttyS0,115200n81 reboot=t
module /initrd-2.6.18-8.el5xen.img
title Red Hat Enterprise Linux Server ( 2.6.18-8.el5 )
root (hd0,0)
kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ console=ttyS0,115200n81 reboot=t
initrd /initrd-2.6.18-8.el5.img

Then I have decided to run another RHEL 5 as guest OS and I followed tips on the internet:

First of all, I booted with the xen kernel then:

1) dd if=/dev/zero of=/xen/xen2 bs=1M count=1 seek=5120
2) mkfs -t ext3 /xen/xen2
3) mount -o loop /xen/xen2 /mnt
4) cp -vrf /{root,dev,var,etc,usr,bin,sbin,lib} /mnt
5) mkdir /mnt/{proc,sys;home,tmp}
6) umount /mnt (if you forget to do this when you call "xm create -c config_file" it gives an error due to destroyDevice() function)

Then I filled the config_file as following:

kernel = "/boot/vmlinuz-2.6.18-8.el5xen"
ramdisk = "/boot/initrd-2.6.18-8.el5xen.img"
vif = [ '' ]
disk = [ 'file:/xen/xen2,sda2,w' ]
root = "/dev/sda2"

One more thing use hda1 instead of sda2.

Are u 100% sure, u copy all files correctly

Try these options..

extra = "ro"

But a got the following error when I try to start my domU "xm create -c /etc/xen/xmexample1:

Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!

Then I have tried to create my own initrd image and used the mkinitrd command as following :
mkinirtd /boot/initrd-2.6.18-8.el5xenU 2.6.18-8.el5xen --fstab /mnt/etc/fstab --with xenblk --with xennet --preload xenblk --preload xennet
and changed the ramdisk line in my configuration file ramdisk = "/boot/initrd-2.6.18-8.el5xenU"

But now I got another error : exec of init (/sbin/init) failed!!!: No such file or directory

register_blkdev: cannot get major 8 for sd
Loading scsi_transport_sas.ko module
Loading mptscsih.ko module
Loading mptsas.ko module
Fusion MPT SAS Host driver 3.04.02
Waiting for driver initialization.
Creating root device.
Mounting root filesystem.
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
Setting up other filesystems.
Setting up new root fs
no fstab.sys, mounting internal defaults
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
exec of init (/sbin/init) failed!!!: No such file or directory
Kernel panic - not syncing: Attempted to kill init!

I have already checked the /sbin/init file which seems to be correct and with necessary rights.

Here is my fstab in the guest FS :

dev/sda2 / ext3 defaults 1 1
LABEL=/boot1 /boot defaults 1 2
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
LABEL=SWAP-sda3 swap swap defaults 0 0

Does anybody know why I got this error ?

Thanks
--

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Emre ERALTAN
Elève ingénieur 3ème année
Electronique et Informatique Industrielle
ENSSAT
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