[Fedora-directory-users] Multimaster Replication Behind a Load Balancer

[Dave Augustus]

piranha = LVS I do believe- maybe some management scripts are different.
I have been using LVS for 5 years now. It works great!

(Help me understand... I am not an iptables guru but I have done some to
get done what I needed to)

your statements:
-A PREROUTING -d <VIP> -p tcp -m tcp --dport 389 -j REDIRECT
-A PREROUTING -d <VIP> -p tcp -m tcp --dport 636 -j REDIRECT

Does this mean?
-you are assigning an 2 IPs to your LDAP servers, one for loadbalancing
and one for LDAP server
-any traffic to the VIP is redirected to the IP that you have told LDAP
server to use

Correct?




On Mon, 2006-12-04 at 14:03 -0600, Stephen C. Rigler wrote:
> Dave,
> 
> We're still in the early stages of looking at doing this, but we're
> using Piranha doing direct-routing as a load balancer.
> 
> On the real servers, we have iptables rules that look like this:
> 
> -A PREROUTING -d <VIP> -p tcp -m tcp --dport 389 -j REDIRECT
> -A PREROUTING -d <VIP> -p tcp -m tcp --dport 636 -j REDIRECT
> 
> It also becomes necessary to set nsslapd-idletimout so that you don't
> end up with tons of idle connections.
> 
> -Steve
> 
> On Mon, 2006-12-04 at 13:50 -0600, Dave Augustus wrote:
> > Hello All.
> > 
> > I want to have 2 hosts that are setup to do multimaster between
> > themselves. Because my application on allows for a single server entry,
> > I want to put both of these behind Linux Virtual Server director, which
> > is a load-balancer that I use for other services currently. With this
> > configuration, I can have either LDAP server go down and my application
> > won't break.
> > 
> > The load balancer requires that I tell the LDAP servers to not respond
> > to arp requests so that the load balancer can. So how can the LDAP
> > servers communicate with each other for updates ? I looked for some
> > information on how to make the LDAP servers use more than one IP for
> > LDAP but could find no answer.
> > 
> > Thanks for your time,
> > Dave
> > 
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