[CentOS] Re: Using CentOS 3 in and LVS?

Sat Sep 16 14:56:57 UTC 2006
Bart Schaefer <barton.schaefer at gmail.com>

On 9/15/06, jim bartus <jim.bartus at gmail.com> wrote:
> Btw, are you sure you even want to bother with DR?

We've got an existing server cluster using it and are only trying to
add new machines; changing the setup for the machines already in the
LVS is not really an option.

We found this:  http://www.ultramonkey.org/3/topologies/sl-ha-lb-eg.html

And adapted it as follows:

# yum install arptables_jf (if necessary)
# /etc/rc.d/init.d/arptables_jf stop
Flushing all chains:                                       [  OK  ]
Removing user defined chains:                              [  OK  ]
Resetting built-in chains to the default ACCEPT policy:    [  OK  ]
# /sbin/arptables -A IN -d [virtual_ip] -j DROP
# /sbin/arptables -A OUT -j mangle -o eth0 -s [virtual_ip]
--mangle-ip-s [realserver_ip]
# /etc/rc.d/init.d/arptables_jf save
Saving current rules to /etc/sysconfig/arptables:          [  OK  ]
# /sbin/chkconfig --level 2345 arptables_jf on
# /etc/rc.d/init.d/arptables_jf start
Flushing all current rules and user defined chains:        [  OK  ]
Clearing all current rules and user defined chains:        [  OK  ]
Applying arptables firewall rules:                         [  OK  ]

Then do "arptables -L -v -n" to verify that the rules were installed correctly.