Requirements¶

• python
• mercurialit (aka “hg”) is an open-source source codemanagement software. See the below.http://www.selenic.com/mercurial/wiki/
• git
• bridge-utils

Getting and Building Xen and Dom0¶

My environment is:

• Machine : Tiger4
• Domain0 OS : RHEL5
• DomainU OS : RHEL5

1. Download source:

   # hg clone http://xenbits.xensource.com/ext/ia64/xen-unstable.hg# cd xen-unstable.hg# hg clone http://xenbits.xensource.com/ext/ia64/linux-2.6.18-xen.hg

2. # make world

3. # make install-tools

4. copy kernels and xen:

   # cp xen/xen.gz /boot/efi/efi/redhat/# cp build-linux-2.6.18-xen_ia64/vmlinux.gz \/boot/efi/efi/redhat/vmlinuz-2.6.18.8-xen

5. make initrd for Dom0/DomU:

   # make -C linux-2.6.18-xen.hg ARCH=ia64 modules_install \  O=$(pwd)/build-linux-2.6.18-xen_ia64# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6.18.8-xen.img \  2.6.18.8-xen --builtin mptspi --builtin mptbase \  --builtin mptscsih --builtin uhci-hcd --builtin ohci-hcd \  --builtin ehci-hcd

Making a disk image for guest OS¶

1. make file:

   # dd if=/dev/zero of=/root/rhel5.img bs=1M seek=4096 count=0# mke2fs -F -j /root/rhel5.img# mount -o loop /root/rhel5.img /mnt# cp -ax /{dev,var,etc,usr,bin,sbin,lib} /mnt# mkdir /mnt/{root,proc,sys,home,tmp}Note: You may miss some device files. If so, please create themwith mknod. Or you can use tar instead of cp.

2. modify DomU’s fstab:

   # vi /mnt/etc/fstab   /dev/xvda1  /            ext3    defaults        1 1   none        /dev/pts     devpts  gid=5,mode=620  0 0   none        /dev/shm     tmpfs   defaults        0 0   none        /proc        proc    defaults        0 0   none        /sys         sysfs   defaults        0 0

3. modify inittab

   set runlevel to 3 to avoid X trying to start:

   # vi /mnt/etc/inittab   id:3:initdefault:

   Start a getty on the hvc0 console:

   X0:2345:respawn:/sbin/mingetty hvc0

   tty1-6 mingetty can be commented out

4. add hvc0 into /etc/securetty:

   # vi /mnt/etc/securetty (add hvc0)

5. umount:

   # umount /mnt

FYI, virt-manager can also make a disk image for guest OS.It’s GUI tools and easy to make it.

Boot Xen & Domain0¶

1. replace eliloelilo of RHEL5 can boot Xen and Dom0.If you use old elilo (e.g RHEL4), please download from the belowhttp://elilo.sourceforge.net/cgi-bin/blosxomand copy into /boot/efi/efi/redhat/:

   # cp elilo-3.6-ia64.efi /boot/efi/efi/redhat/elilo.efi

2. modify elilo.conf (like the below):

   # vi /boot/efi/efi/redhat/elilo.confprompttimeout=20default=xenrelocatableimage=vmlinuz-2.6.18.8-xen       label=xen       vmm=xen.gz       initrd=initrd-2.6.18.8-xen.img       read-only       append=" -- rhgb root=/dev/sda2"

The append options before “–” are for xen hypervisor,the options after “–” are for dom0.

FYI, your machine may need console options like“com1=19200,8n1 console=vga,com1”. For example,append=”com1=19200,8n1 console=vga,com1 – rhgb console=tty0 console=ttyS0 root=/dev/sda2”

Getting and Building domU with pv_ops¶

1. get pv_ops tree:

   # git clone http://people.valinux.co.jp/~yamahata/xen-ia64/linux-2.6-xen-ia64.git/

2. git branch (if necessary):

   # cd linux-2.6-xen-ia64/# git checkout -b your_branch origin/xen-ia64-domu-minimal-2008may19

Note:

The current branch is xen-ia64-domu-minimal-2008may19.But you would find the new branch. You can see with“git branch -r” to get the branch lists.

http://people.valinux.co.jp/~yamahata/xen-ia64/for_eagl/linux-2.6-ia64-pv-ops.git/

is also available.

The tree is based on

git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 test)

3. copy .config for pv_ops of domU:

   # cp arch/ia64/configs/xen_domu_wip_defconfig .config

4. make kernel with pv_ops:

   # make oldconfig# make

5. install the kernel and initrd:

   # cp vmlinux.gz /boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU# make modules_install# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img \  2.6.26-rc3xen-ia64-08941-g1b12161 --builtin mptspi \  --builtin mptbase --builtin mptscsih --builtin uhci-hcd \  --builtin ohci-hcd --builtin ehci-hcd

Boot DomainU with pv_ops¶

1. make config of DomU:

   # vi /etc/xen/rhel5  kernel = "/boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU"  ramdisk = "/boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img"  vcpus = 1  memory = 512  name = "rhel5"  disk = [ 'file:/root/rhel5.img,xvda1,w' ]  root = "/dev/xvda1 ro"  extra= "rhgb console=hvc0"

2. After boot xen and dom0, start xend:

   # /etc/init.d/xend start

( In the debugging case,# XEND_DEBUG=1 xend trace_start )

3. start domU:

   # xm create -c rhel5

Reference¶

• Wiki of Xen/IA64 upstream mergehttp://wiki.xensource.com/xenwiki/XenIA64/UpstreamMerge

Written by Akio Takebe <takebe_akio@jp.fujitsu.com> on 28 May 2008