Base install

cd /kvm
qemu-img create -f qcow2 vms/vm-centos5-i386-base.qcow2 8G
# ISO (dvd) install:
kvm -m 2047 -hda /kvm/vms/vm-centos5-i386-base.qcow2 -cdrom CentOS-5.3-i386-bin-DVD.iso -redir 'tcp:2225::22' -boot d -smp 2 -cpu qemu32,-nx -net nic,model=virtio -net user

Configure for serial console

(cd vms && qemu-img create -b vm-centos5-i386-base.qcow2 -f qcow2 vm-centos5-i386-serial.qcow2)
kvm -m 2047 -hda /kvm/vms/vm-centos5-i386-serial.qcow2 -cdrom CentOS-5.3-i386-bin-DVD.iso -redir 'tcp:2225::22' -boot c -smp 2 -cpu qemu32,-nx -net nic,model=virtio -net user -nographic

Add to /boot/grub/menu.lst:

serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
terminal --timeout=3 serial console

also add in menu.lst to kernel line (after removing `quiet splash'):

console=tty0 console=ttyS0,115200n8

Add login prompt on serial console:

cat >>/etc/inittab <<END

# Serial console.
S0:2345:respawn:/sbin/agetty -h -L ttyS0 19200 vt100
END

Create account.

useradd buildbot
# Password is disabled by default in Centos5.
usermod -a -G wheel buildbot
visudo
# Uncomment the line "%wheel        ALL=(ALL)       NOPASSWD: ALL"
# Comment out this line:
# Defaults    requiretty

# Put in public ssh key for own account and host buildbot account.
# Note that Centos5 seems to require .ssh/authorized_keys chmod go-rwx.
su - buildbot
mkdir .ssh
chmod go-rwx .ssh
cat >.ssh/authorized_keys
# Paste the id_dsa.pub key, see above.
chmod go-rwx .ssh/authorized_keys

Image for rpm build

qemu-img create -b vm-centos5-i386-serial.qcow2 -f qcow2 vm-centos5-i386-build.qcow2
kvm -m 2047 -hda /kvm/vms/vm-centos5-i386-build.qcow2 -cdrom /kvm/CentOS-5.3-i386-bin-DVD.iso -redir 'tcp:2225::22' -boot c -smp 2 -cpu qemu32,-nx -net nic,model=virtio -net user -nographic

Install compilers etc:

sudo yum groupinstall "Development Tools"
sudo yum install gperf readline-devel ncurses-devel zlib-devel libaio-devel openssl-devel perl perl\(DBI\)

Download 5.0 rpm for shared-compat:

sudo mkdir -p /srv/shared/yum/CentOS/5/i386/RPMS/
cd /srv/shared/yum/CentOS/5/i386/RPMS/
sudo wget http://mirror.ourdelta.org/yum/CentOS/5/i386/RPMS/MySQL-OurDelta-shared-5.0.87.d10-65.el5.i386.rpm

Image for install/test

qemu-img create -b vm-centos5-i386-serial.qcow2 -f qcow2 vm-centos5-i386-install.qcow2
kvm -m 2047 -hda /kvm/vms/vm-centos5-i386-install.qcow2 -cdrom /kvm/CentOS-5.3-i386-bin-DVD.iso -redir 'tcp:2225::22' -boot c -smp 2 -cpu qemu32,-nx -net nic,model=virtio -net user -nographic

Install extra dependencies:

sudo yum install perl perl\(DBI\)