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

From: Marcin Jessa (lists_at_yazzy.org)
Date: 09/07/05

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    Date: Wed, 7 Sep 2005 10:29:08 +0200
To: "Eric W. Bates" <ericx@vineyard.net>

    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@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@vineyard.net
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