On Wed, 13 Jun 2007 15:40:36 +1000
Darren Tucker <[EMAIL PROTECTED]> wrote:
> Would it be possible to to this the way the IBM eNetwork dispatchers
> used to do this? Put all of the machines on the same broadcast
> domain, then:
>
> 1. add a static published arp entry for the cluster address on the
> balancer with its own mac address so packets aimed at the cluster
> address will go to the balancer.
>
> 2. configure all cluster members with a loopback interface with the
> cluster address.
>
> 3. use route-to pf rules with a next-hop to punt incoming packets to
> various nodes in the cluster
I think all load balancers implementing direct server return / direct
routing use this trick.
You're not going to be able to get away without messing with arp so
you're bound to a single broadcast domain.
Your scenario should be tried out, yes, but it is still just a ugly
hack if you ask me :)
Now you still can't really make this work with hoststated or any
other LB on OpenBSD. I'd still like to find an elegant way to do this
and integrate it with hoststated.
And just for the record what you said maps to:
pass in on $ext_if route-to { $webh1, $webh2 } round-robin proto tcp \
from any to $virt_ip port http no state
pass out on $int_if from any to $virt_ip port http no state
If I get the occasion I'll try it out and see how that works.
I also wonder how it would behave when setting the arp entry to that of
a carp interface.
