Configuring LVS under Single System Image Cluster 

Step 1.
	Prepare the kernel sources  by following the information present in the SSI README files. After preparing the kernel souce, use  the LVS patch provided with SSI( ssic-linux/3rd-party )

apply this patch to the kernel souce.

===> cd /usr/src/linux
===> patch -p1 < <path_to_patch>/ssic-linux-2.4.18-ipvs-1.0.4-hidden.patch

Step 2.
	Configure the kernel as per instruction from the SSI Howto.You may also need to build LVS related modules as per the information from the following link.(A sample .config file can be found  ssic-linux/ssi-kernel )
http://linuxvirtualserver.org/Joseph.Mack/mini-HOWTO/LVS-mini-HOWTO-3.html#ss3.6

===> make xconfig
===> make modules modules_install

Step 3.
===> Install the ipvsadm utilities.

Step 4.
	Follow the instructions from the SSI Howto regarding installing a hardware cluster.

	Additional Instruction needed to enable networking in Debian 
	-----------------------------------------------------------
	execute the 'install-deb-initscripts' present in the cluster-tools source directory. This will create all node specific directories and files for the cluster. On a two node cluster you should have the following directories.

	kaneesh@dhavalgiri:~$ cd /cluster/
	kaneesh@dhavalgiri:/cluster$ ls -al
	total 20
	drwxr-xr-x    5 root     root         4096 Oct 15 12:30 .
	drwxr-xr-x   26 root     root         4096 Sep 26 10:35 ..
	drwxr-xr-x    4 root     root         4096 Oct 15 12:29 nodenum1
	drwxr-xr-x    4 root     root         4096 Oct 15 12:29 nodenum2
	drwxr-xr-x    4 root     root         4096 Oct 15 12:24 {nodenum}
	
	The directory nodenum1 will contain all the node specific files for node 1 and nodenum2 will contain all the node specific files for node2. {nodenum} is used  to help boot the system with a normal kernel after installing the cluster tools. 


Configuring HA-LVS 

Step 1.
	download the ha-lvs.tar file from the 
http://ssic-linux.sourceforge.net/contrib/ha-lvs.tar.gz

Step 2.
	build and install the ha-lvs
===>cd ha-lvs
===>make  install

Step 3.
Configuration file  format

------------------
<?xml version="1.0"?>
<cvips>
        <cvip>
                <ip_addr>192.168.200.10</ip_addr>
                <director_node>
                        <node_num>1</node_num>
                        <garp_interface>eth0</garp_interface>
                        <sync_interface>eth0</sync_interface>
                </director_node>
                <real_server_node>
                        <node_num>1</node_num>
                </real_server_node>
                <real_server_node>
                        <node_num>2</node_num>
                </real_server_node>

        </cvip>
</cvips>

------------------
Most of the fields are self explanatory. 
garp_interface => Is the network interface used for sending garp advertisement.
sync_interface => Is the network interface used for lvs table syncing 


Keepalived ,LVS and SSI.
---------------------------
Keepalived can also be used to configure HA LVS on SSI. The modification needed are already a part of keepalived project. For more information regarding configuring keepalived  look at.  http://keepalived.org/ . Follow the mailing list for Configuration information under SSI.

The format of a typical keepalived configuration file under SSI is given below 

------------------------------keepalived.conf-------------------
! Configuration File for keepalived
! CI-LINUX configuration sample

global_defs {
   notification_email {
     lvs-alert@domain.com
   }
   notification_email_from email@domain.com
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   lvs_id CI-LNX
}

virtual_server 192.168.200.10 80 {
    delay_loop 10
    lb_algo wrr
    lb_kind DR
    protocol TCP

    sorry_server 192.168.200.200 80

    real_server 192.168.200.2 80 {
        weight 1
        CI-LINUX
    }

    real_server 192.168.200.3 80 {
        weight 1
        CI-LINUX
    }
    real_server 192.168.200.4 80 {
        weight 1
        CI-LINUX
    }
    real_server 192.168.200.5 80 {
        weight 1
        CI-LINUX
    }
}
----------------------------------------------------------
Hope this help in configuring SSI and LVS. If you have any problem 
mail aneesh.kumar@digital.com/ssic-linux-devel@lists.sourceforge.net