====== Kopiluwak: The Build Machine ======
===== Hardware ======
  * HP DL145 G3
  * Firmware based on coreboot [[http://www.coreboot.org/HP_DL145_G3|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)
===== Idea ======
The machine hosts virtual machines. Other than that no functionality runs on the machine.

===== Host =====
==== Software ====
^ software    ^ version      ^ website                            ^
| Lunar Linux | 1.6.4 x86_64 | [[http://lunar-linux.org]]         |
| Linux       | 2.6.30.5     |                                    |
| 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]]  |
==== Configuration ====
=== Storage ===
* 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 |

=== Network ===
  * eth0 - bridged to br0, ip assigned with dhcp
  * br0: run script in screen
<code bash>
#!/bin/bash
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 0.0.0.0 promisc up #still need to test if promisc is needed
/sbin/ifconfig tap0 0.0.0.0 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"
/sbin/reboot
else
echo "USE SCREEN";
fi
</code>
  * vde_switch: Switch that the virtual machines (buildslaves) will use to communicate with the buildmaster.
<code bash>
vde_switch -tap tap1 -daemon;
ifconfig tap1 10.0.0.1;
echo "1" >  /proc/sys/net/ipv4/ip_forward;
iptables -t nat -A POSTROUTING -o br0 -j MASQUERADE
</code>

===== Hosted Virtual Machines =====
==== Guest 1: buildbot.xfce.org ====
=== Configuration ===
== Start the machine ==
<code bash>
#!/bin/bash
# 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
</code>
== network ==
  * eth0: fixed ip - external ip (dns: buildbot.xfce.org)
  * eth1: internal nic connected to the virtual switch (ip: 10.0.0.2)
== software ==
  * buildbot 0.7.10p1
== config buildbot ==
  * create the user buildmaster
  * Create instance of buildbot:
<code bash>
buildbot create-master /home/buildmaster/xfce
</code>
  * start the buildbot instance:
<code bash>
buildbot start /home/buildmaster/xfce
</code>
  * configure the buildbot instance: edit master.cfg
  * validate the edits:
<code bash>
buildbot checkconfig master.cfg
</code>
  * reread the config in the current instance:
<code bash>
buildbot reconfig /home/buildmaster/xfce
</code>
  * master.cfg:
<code python>
</code>

==== Guest 2: buildslave ====

lunar
ip 10.0.0.3
  vdeq qemu-system-x86_64 -vnc :2 -hda /dev/vg/lunar -m 512 -net vde,vlan=1 -net nic,vlan=1 -daemonize