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I think you would not have to blow up the pf code
itself too much.
Simply put, take a look at the packet in
ip_input.c.
Look, if it should be destinated to some of your
real server.
Calculate the next real server to give to packet to
based
on some infos (connections, load,
etc).
Create a (temporary) pf-nat rule.
I think somethink like that could be
possible.
(Oversimplyfied, I know).
But as far as I understand the BSD kernel and the
pf package it should work.
----- Original Message -----
Sent: Friday, June 20, 2003 7:05 PM
Subject: Re: Linux virtual server
competition
I'm not an OpenBSD developer, but in my opinion, I'd
intergrate it as
a standalone application, because you will want it to be
very flexible
eventually, and you don't want to bloat the pf code too
much... since
it needs to be a very fast responding firewall
solution. Then again,
I don't know the technicalities or even if it's
possible to use a
userland package to provide true load balancing abilities
based on
either what you said, or mem usage, or whatever.
Adam
Wenzel
In a message dated 6/20/2003 12:01:44 PM Central Daylight
Time, [EMAIL PROTECTED] writes:
Hi list,
I'm sure anyone here knows about the linux virtual server
(layer 4 load-balancer).
I searched the web for an
equivalent for *bsd, but found none.
The only thing which
looks like something like a load-balancer is the FreeBSD loadd,
which requires packets to
copied from kernel-space to user-space and vice versa.
I know that OpenBSD/pf
has some abilities for load-balancing ip packets.
I'd like to know if it
goes beyond the round-robin stuff (e.g. schedulars for
least-connection,weighted round-robin),
or if just does
that.
I've played arround with load-balancers (F5 BigIP,local
director) and would like to write one for *BSD's, if
there is a demand for
that (and to get my hand dirty on code again).
Would it be a good idea
to integrate it into a packet-filter (like the lvs) or implement it as
a
stand-alone solution ?
Any comment is welcome.
Hope this is not to
off-topic.
Regards,
Stefan
Sonnenberg-Carstens
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