[CentOS] load balancer recommendations

Sun Jan 20 00:06:45 UTC 2013
Joseph Spenner <joseph85750 at yahoo.com>

Am 19.01.2013 um 21:35 schrieb Boris Epstein <borepstein at gmail.com>:

> > Hello all,
> >
> > The question is not necessarily CentOS-specific - but there are lots of
> > bright people on here, and - quite possibly - the final implementation
> will
> > be on CentOS hence I figured I'd ask it here. Here is the situation.
> >
> > I need to configure a Linux-based network load balancer (NLB) solution.
> The
> > idea is this. Let us say I have a public facing load balancer machine
> with
> > an public IP of, say, It is to receive the traffic (let's
> say,
> > HTTP traffic) and then route it to two private HTTP servers, let's say,
> > and It has to have persistence - i.e., be
> > state- and session-aware. If for whatever reason one of the servers goes
> > down the remaining pool shares all the traffic in some fashion (be it
> eound
> > robin, saturation based, whatever).
> >
> > We have tried Vyatta ( http://vyatta.org/ ) and ZeroShell (
> > http://www.zeroshell.org/ ) and both are very good but their NLB seems
> to
> > be externally facing (i.e., you have several internet connections and are
> > trying to divide your traffic between them). What we need is an
> "internally
> > facing" one, if I may say so.
> >
> > Any advice on what may help us would be greatly appreciated.

I've had pretty good luck with Barracuda load balancers..  You can configure them to keep a user session on a single server, which is often desired, and spread new connections to other servers as they arrive.
The only problem I had with them, ironically, was they would crash if I purchased their "Live Updates" feature.  It's some sort of auto updating black-list service you can buy which helps protect the device and your resources.  But after I disabled that, the device has been rock solid.  Been working great since about 2006.

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