Network

master:
br0 : 10.20.107.30 binded with eth0
eth1: 192.168.1.30
eth2: 192.168.2.30

slave:
br0 eth0: 10.20.107.33 binded with eth0
br1: no ip address binded with eth1
eth1: 192.168.1.33
eth2: 192.168.2.33

Eth1 both sides directly connected by cable
Eth2 both sides directly connected by cable

Repositories used:

https://github.com/Pating/colo-proxy/tree/changlox
https://github.com/macrosheep/iptables.git 
https://github.com/torvalds/linux 

https://github.com/wencongyang/xen 

Kernel build instructions followed:

2. Prepare host kernel for Dom0
colo-proxy kernel module need cooperate with linux kernel. You should patch kernel with ~/colo-proxy/colo-patch-for-kernel.patch 
-cd ~/colo-proxy/; git checkout 405527cbfa9f
-cd ~/linux/; git checkout v4.0; git am ~/colo-proxy/colo-patch-for-kernel.patch 
-cp /boot/config-3.0.76-0.11-xen .config; make menuconfig to config your kernel support Dom0. Ref: http://wiki.xenproject.org/wiki/Mainline_Linux_Kernel_Configs 
-make -j8; make modules_install; make install 
-reboot


COLO-Proxy:

-cd ~/colo-proxy/; git checkout 405527cbfa9f; make; make install

IPTables:

-cd iptables; ./autogen.sh; ./configure --prefix=/usr/ --libdir=/usr/lib64; make; make install

XEN:

-./autogen.sh
-./configure --enable-debug 
-touch tools/libxl/libxlu_disk_l.l 
-touch tools/libxl/libxlu_cfg_l.l 
-make dist-xen 
-make dist-tools 
-make install-xen 
-make install-tools 

*i've tried with https://github.com/wencongyang/qemu-xen but got an error with qemu when xl creating the VM as follows:

>libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error message from QMP server: Could not set password

Qemu

-cd ~/qemu-xen/; git checkout colo-xen-v2

Configured QEMU with script provided at:
http://xen.markmail.org/message/y4jcdqxw2s2labdo?q=COLO#query:COLO+page:1+mid:3lzcuzeokqsqpu4i+state:results

*path_to_xen_source updated according my directory tree.
then..

-make
-make install

Running COLO

*HVM SUSE 64bits

primary:
rm -f /var/log/xen/* 
rm -f /var/lib/xen/userdata-d.* 
service xencommons start 
modprobe nf_conntrack_ipv4 
modprobe xt_PMYCOLO sec_dev=eth1

secondary:
rm -f /var/log/xen/*
rm -f /var/lib/xen/userdata-d.*
service xencommons start
modprobe xt_SECCOLO
active_disk=/mnt/ramfs/active_disk.img
hidden_disk=/mnt/ramfs/hidden_disk.img
local_img=/root/new/SUSE/xenguest.img
tmp_disk_size=`/root/new/pating/qemu-xen/qemu-img info $local_img |grep 'virtual size' |awk  '{print $3}'`
rm -rf /mnt/ramfs/*
umount /mnt/ramfs/
rm -rf /mnt/ramfs/
mkdir /mnt/ramfs

function create_image()
{
     /root/new/pating/qemu-xen/qemu-img create -f qcow2 $1 $tmp_disk_size
}
function prepare_temp_images()
{
     grep -q "^none /mnt/ramfs ramfs" /proc/mounts
     if [[ $? -ne 0 ]]; then
         mount -t ramfs none /mnt/ramfs/ -o size=2G
     fi

     if [[ ! -e $active_disk ]]; then
         create_image $active_disk
     fi

     if [[ ! -e $hidden_disk ]]; then
         create_image $hidden_disk
     fi
}
prepare_temp_images

primary:

xl create new/SUSE/vm-suse.cfg
xl pause vm-suse
xl remus -c -u vm-suse 192.168.2.33