Re: [Xen-users] Compiled DomU doesn't boot on CentOS 5.4 Dom0 -- (kernel panic - not syncing: Attempted to kill init!)

[Brendan Jiang <brendan.jiang@xxxxxx>]

Forgot to include the /media/vm1disk/etc/fstab file:
[root@localhost ~]# cat /media/vm1disk/etc/fstab
/dev/sda1                 /                       ext3    defaults        1 1
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
LABEL=SWAP-sda4         swap                    swap    defaults        0 0

This file was copied from the default installation of CentOS 5.4 and modified
"LABEL=/" to "/dev/sda1". I didn't make change to the swap partition setting.
Does that matter?

Thanks!

Best regards,
Brendan


Quoting Bo Jiang <bjiang@xxxxxx>:

> Hi,
>
> I installed CentOS 5.4 with virtualization enabled, and Dom0 boots up
> perfectly. However, when I tried to boot a DomU that I compiled based on
> xen-unstable and CentOS' config, it makes no success on booting. I highly
> appreciate if anyone could help me on this.
>
> In summary, the booting process of DomU hangs with the following as the last
> lines:
> "SCSI subsystem initialized
> Initializing USB Mass Storage driver...
> usbcore: registered new driver usb-storage USB Mass Storage support
> registered.
> Adaptec aacraid driver (1.1-5[2409]-mh2) Kernel panic - not syncing:
> Attempted to kill init!"
>
> Below are my compiling and booting details, and related config/log files are
> also attached.
>
> 1) CentOS 5.4 -- DVD image downloaded from centos.org, installed from hard
> drive, installed onto /dev/sda7. Dom0 works perfectly.
>
> 2) compile DomU -- In some other threads, someone said that refreshing the
> py scripts under /usr/lib/python2.4/ may cause kernel panic because of
> version mismatch. Therefore I compiled DomU in a separate partition (other
> than /dev/sda7) in order to keep /dev/sda7 clean (as freshly installed).
> Then the kernel images of DomU were copied to /dev/sda7 for test.
>
> a) downloaded with "hg clone http://xenbits.xen.org/xen-unstable.hg"; and "hg
> clone http://xenbits.xen.org/linux-2.6.18-xen.hg";
> b) cd xen-unstable.hg
>    cp /boot/config-2.6.18-164.el5xen .config (config file attached)
>    vi buildconfigs/mk.linux-2.6-common to add "XEN_LINUX_CONFIG ?=
> $(XEN_ROOT)/.config"
>    make KERNELS="linux-2.6-xenU" world
>    make install
>    depmod 2.6.18.8-xenU
>    mkinitrd -v -f --with=aacraid --with=sd_mod --with=scsi_mod
> initrd-2.6.18.8-xenU.img 2.6.18.8-xenU
>
> 3) boot DomU
>
> a) create a file-backed VBD with
>
> dd if=/dev/zero of=vm1disk bs=1k seek=2048k count=0 make sure the image has
> the correct security context following the instructions on
> http://wiki.centos.org/HowTos/Xen/InstallingCentOSDomU
> mkfs -t ext3 vm1disk
> mount -o loop vm1disk /media/vm1disk
> cp -ax /{root,dev,var,etc,usr,bin,sbin,lib,boot} /media/vm1disk mkdir
> /media/vm1disk/{proc,sys,home,tmp}
> vi /media/vm1disk/boot/grub/grub.conf to change sda7 to sda1, and modify the
> kernel image name as appropriate.
> umount /media/vm1disk
>
> b) config file /etc/xen/mysinglevm:
>
> kernel = "/boot/vmlinuz-2.6.18.8-xenU"
> ramdisk = "/boot/initrd-2.6.18.8-xenU.img"
> builder='linux'
> memory = 64
> name = "myFirstDomU"
> cpus = ""         # leave to Xen to pick
> vcpus = 1
> vif = [ 'mac=00:16:3e:00:00:11, bridge=xenbr0' ] disk = [
> 'tap:aio:/home/bjiang/domUdisks/vm1disk,sda1,w' ] dhcp="dhcp"
> root = "/dev/sda1 ro"
> extra = "4"
> on_poweroff = 'destroy'
> on_reboot   = 'restart'
> on_crash    = 'restart'
>
> (P.S. I'm not sure whether here root should be set as sda1 or sda7, but
> neither solves the problem.)
>
> c) xm create -c mysinglevm vmid=1, then kernel panic
>
> After kernel panic during DomU's booting, I catched the log files as the
> attached files, and xm list shows that DomU is blocked:
> [root@localhost xen]# xm list
> Name                                      ID Mem(MiB) VCPUs State   Time(s)
> Domain-0                                   0     3599     2 r-----    102.5
> myFirstDomU                               21       64     1 -b----      0.2
>
> I found each time I run the xm create command, the vmid will increase by 1
> regardless of the parameter "vmid=1".
>
> Any comments or advice are highly welcome! Thank you very much!
>
> Best regards,
> Brendan
>
>
>

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