Hi everybody,
I'have made a simple software load-balancer for FreeBSD. It work only in
direct-routing mode.
This is a kernel module that works for freebsd 6.2, 6.3 and 7.0 (tested)
(and netbsd soon). It use pfil in order to watch incoming packet and
redirect to real-server. You can define multiple virtual-ip for a same
pool of real-server. You can use fourth scheduler: round-robin,
least-connections, round-robin with weight and least-connections with
weight. You can specify some timeout (before closing or dropping
connections), persistence (for TLS) and the size of the connections hash
table.
When you inhibit real-server, only new connections are not redirected to
it. The load-balancer keep open-connections (that's why I made it. IPVS
does'nt do this job right).
It come with two tools: drlbctl for configuring it. And lbdyn, who will
check your real-server (ala keepalived).
It's a very simple tool and I need some times to add useful features
(like sharing of connections table..) but I use in in a production
environment. IPv6 will be tested soon.
You can find it here: http://jym.free.fr (under construction :-) and
source here: http://jym.free.fr/files/drlb-0.7.tar.gz
I will make a ports soon.
Comments are welcome.
Greetings from Paris!
jym
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