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Kopiluwak: The Build Machine


  • HP DL145 G3
  • Firmware based on coreboot Coreboot page on HP DL145 g3
    • original bios did not support hardware virtualisation
    • bootloader is embedded in the firmware and is similar to grub. Config file in /boot/filo/menu.lst .
  • Dual Opteron 2218HE
  • 8GB reg ecc ram (kingston)
  • dual 200GB sata drives (software raid 1)


The machine hosts virtual machines. Other than that no functionality runs on the machine.



software version website
Lunar Linux 1.6.4 x86_64 http://lunar-linux.org
kvm 88 http://kvm.qumranet.com
vde 2.2.2 http://vde.sourceforge.net
lvm2 2.02.45 http://sources.redhat.com/lvm2
tunctl 1.5 http://tunctl.sourceforge.net



* root and boot

/dev/md1 / ext3
/dev/md0 /boot ext3

* var, home, luns for vm's VolumeGroup: vg on /dev/md2

/dev/mapper/vg-home /home ext4
/dev/mapper/vg-var /var ext4


  • eth0 - bridged to br0, ip assigned with dhcp
  • br0: run script in screen
if [ $TERM == screen ]; then
/usr/bin/killall dhcpcd
/bin/rm -fr /var/db/dhcpcd*
/sbin/modprobe tun
/usr/sbin/tunctl -t tap0
/usr/sbin/brctl addbr br0
/usr/sbin/brctl addif br0 eth0
/usr/sbin/brctl addif br0 tap0
/sbin/ifconfig eth0 promisc up #still need to test if promisc is needed
/sbin/ifconfig tap0 promisc up #still need to test if promisc is needed
/sbin/ifconfig br0 up
/usr/sbin/dhcpcd br0
echo "Sleep for 5 minutes, Ctrl ^ C to stop, will revert changes if you don't"
sleep 5m
echo "revert changes"
/sbin/ifconfig br0 down
/usr/bin/killall dhcpcd
/bin/rm -fr /var/db/dhcpcd*
/usr/sbin/brctl delif br0 eth0
/usr/sbin/brctl delif br0 tap0
/usr/sbin/brctl delbr br0
/usr/sbin/tunctl -d tap0
/sbin/ifconfig eth0 up
/usr/sbin/dhcpcd eth0
echo "Sleep for 5 minutes, Ctrl ^ C to stop, will revert changes if you don't"
sleep 5m
echo "reboot"
echo "USE SCREEN";
  • vde_switch: Switch that the virtual machines (buildslaves) will use to communicate with the buildmaster.
vde_switch -tap tap1 -daemon;
ifconfig tap1;
echo "1" >  /proc/sys/net/ipv4/ip_forward;
iptables -t nat -A POSTROUTING -o br0 -j MASQUERADE

Hosted Virtual Machines

Guest 1: buildbot.xfce.org


Start the machine
# This script starts the buildbot
vdeq qemu-system-x86_64 -vnc :1 -hda /dev/vg/BuildBot -m 512 -net nic,vlan=0 -net tap,vlan=0,ifname=tap0,script=no -net vde,vlan=1 -net nic,vlan=1 -daemonize
  • eth0: fixed ip - external ip (dns: buildbot.xfce.org)
  • eth1: internal nic connected to the virtual switch (ip:
  • buildbot 0.7.10p1
config buildbot
  • create the user buildmaster
  • Create instance of buildbot:
buildbot create-master /home/buildmaster/xfce
  • start the buildbot instance:
buildbot start /home/buildmaster/xfce
  • configure the buildbot instance: edit master.cfg
  • validate the edits:
buildbot checkconfig master.cfg
  • reread the config in the current instance:
buildbot reconfig master.cfg
  • master.cfg:

Guest 2: buildslave

lunar ip

vdeq qemu-system-x86_64 -vnc :2 -hda /dev/vg/lunar -m 512 -net vde,vlan=1 -net nic,vlan=1 -daemonize