Load Balancing - Nice and Easy - no BGP, no isp help.

[Marcin Jessa]

Hi.

I am not sure what you're trying to accomplish.
Sometimes it seems like you want redudant links and sometimes like you want a proxy server.
Could you please describe your problem ?

End a quick link for Eric Bates: http://www.openbsd.org/faq/pf/pools.html

Cheers,
Marcin

On Tue, 06 Sep 2005 13:18:10 -0400
"Eric W. Bates" <ericx at vineyard.net> wrote:

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> I've seen one commercial product control incoming load-balancing with DNS.
> 
> Theoretically if you set the TTL for the RRs down low (I've never gone
> shorter than 300 seconds; but I suppose you could go smaller); you could
> then 'direct' incoming traffic by providing one IP or the other.  Tools
> like bind9-dlz should make it easier to control the zone file dynamically.
> 
> In the case of a web page that requires a consistent route during a
> session, I don't know of an easy way to control bind response based on
> request source.  You can put source configs in named.conf (we do this
> for "split-horizon" DNS when you use the same name server to respond to
> requests from both inside and outside a NAT). But I don't believe that
> aspect is hooked for dynamic control inside the latest version (I could
> be wrong).
> 
> Can you share your pf config?
> 
> Ovidiu Ene wrote:
> > Hello friends
> > 
> > I am trying for a while to make a load balancer under FreeBSD. No BGP
> > support from isps!
> > 
> > I would have: 3 nics, ISP1 nic, ISP2 nic and LAN nic.
> > What i've done until now, after reading lots of posts, googling for a
> > while:
> > 
> > - I've suceeded to setup an outgoing load balancer with pf, it works
> > perfectly but only for outgoing traffic;
> > - I've noticed that almost everybody thing that it cannot be done load
> > balancing with BSD of incoming and outgoing without help of that both
> > ISP (BGP)
> > - I find hardware with proprietary OS/firmware that can do load
> > balancing without support of ISP. Some are cheap (300$), but at review
> > does not know to load balance incoming traffic (break functionality of
> > some pages accessed, since some of load is on one interface, some of
> > other, works corectly only if i setup to come some type of traffic on
> > one interface, some of other (for example trafic via port 80 on one nic,
> > ftp traffic on the other), also are expensive hardware load balancers
> > (over 1000$) that... i am asking myself how it works, without help of isp.
> > - I've found somewhere that it can be done load balancing but not with
> > one box with that 3 nics, but with 3 boxex, because (that article i am
> > "insipring" said that every box has just one routing table) because can
> > be created a virtual server that with handle routes from that 2 boxes.
> > - People told me that in Linux load balancing cand be done, 3 nics, 2
> > external, one to Lan, with iptables. Here is a short article:
> > http://linux.com.lb/wiki/index.pl?node=Load%20Balancing%20Across%20Multiple%20Links
> > 
> > 
> > So, my question is, if some people made it (in expensive hardware that
> > did have the same OS, maybe even FreeBSD, and proprietary algorythms)
> > and in Linux it can be done (people told me, i've read articles and also
> > so it here, where i live) why it cannot be done under FreeBSD?
> > I guess it can be done, I want to do it with FreeBSD, and want to obtain
> > same performances as with Linux.
> > 
> > What is your opinion about that? What should I do? Anybody suceed in
> > making load balancing work that way?
> > 
> > Best Regards,
> > Ovidiu
> > 
> > ps. FreeBSD is the best!
> > 
> > 
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> - --
> Eric W. Bates
> ericx at vineyard.net
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