mcast-interface

[Horms]

On Thu, Oct 20, 2005 at 01:25:58PM -0400, Davis, Jacob wrote:
> Hello,
> 
> I'm setting up my first LVS HA, load balancing cluster and my question
> is about assigning an interface for use by the ipvs_sync daemon. I can
> see from the ipvsadm man page that you can pass the --mcast-interface
> option on the command line but how should one handle this when it is
> started by heartbeat? I contemplated editing the LVSSyncDaemonSwap
> resource script but thought there might be a better way.

LVSSyncDaemonSwap::master::eth1

Although, these days the kernel lets you run both the master and backup
sync daemon simultaneously. So my recommendation is to start them both
using ipvsadm at boot.

If you do want to use LVSSyncDaemonSwap, please use this version of
heartbeat:

http://www.ultramonkey.org/download/heartbeat/1.2.3.cvs.20050927/

> Also, I'd like to know what the recommendation is for where to put the
> sync traffic. Should it be on the same interface that is used for the
> heartbeat broadcast (a private, crossover network in my case), or is it
> better to put this traffic on the same interface that handles public
> traffic?

There shouldn't be much traffic, and its reasonably resistant to
packet-loss, so it shouldn't really matter much where you put it.

-- 
Horms