Xen on FC5
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2006-07-03


Prepare your install for Xen:

1.  Install minimal FC5 and run "yum update" to bring the system up2date

2.  yum -y install kernel-xen0 kernel-xenU xen

change SELinux level
	vi /etc/sysconfig/selinux
	SELINUX=disabled (or permissive)

3.  boot to xen0 kernel (edit /etc/grub.conf to make this default, count starts at 0)

4.  run xentop (if that works, you are done prepping)

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Prepare a guest OS:

1.  At console or ssh into dom0  (dom0 = host OS)

2.  mkdir /mnt/temp && mount ip.ad.dr.ess:/FC5 /mnt/temp/    #NFS share location

3.  mkdir /mnt/fc5disc1 && mount -t iso9660 -o loop,ro /mnt/temp/FC-5-i386-disc1.iso /mnt/fc5disc1

4.  cp /mnt/fc5disc1/images/xen/vmlinuz and initrd.img to /root/

5.  umount both mounts

6.  lvcreate -n <name> -L 10G <vgname>
	guest1 will work for <name>
	vgdisplay to get <vgname>

7.  vi /etc/xen/guest1    #give a different MAC address to each guest
---BEGIN---
name = "guest1"
memory = "256"
disk = ['phy:VolGroup00/guest1,xvda,w']
vif = ['mac=00:11:22:33:44:55']
on_reboot = 'restart'
on_crash = 'restart'
device_model = '/usr/lib/xen/bin/qemu-dm'
----END----

8.  xm create -c /etc/xen/guest1 ramdisk=/root/initrd.img kernel=/root/vmlinuz name=guest1 extra="vnc askmethod"

9.  Start answering the install questions!
	ctrl + ] then enter to stop a borked install
	Start VNCviewer on a gui client machine and follow instructions on how to connect
	Do GUI install
	xvda is your "disc" so all partitions can be destroyed inside that.
	when install completes, click Reboot, the guest will shut down.
	"xm destroy guest1" to stop the guest

10.  vi /etc/xen/guest1
	add this line:  bootloader = '/usr/bin/pygrub'

11.  To start guest1 and attach to the console: "xm create -c guest1"
	start guest1: "xm create guest1"
	attach to guest1 console: "xm console guest1"

12.  To start guest1 automatically at boot, put /etc/xen/guest1 in /etc/xen/auto (either mv it or symlink it from /etc/xen/

13.  To clone the guest1 virtual machine:
	lvcreate -n guestcopy
	dd if=/dev/VolGroup00/guest1 of=/dev/VolGroup/guestcopy
	see also lvcreate with the -s option (snapshot)