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On Tue, Mar 03, 2009 at 04:58:53PM -0600, Tim Bourne wrote:
> I'm rather new to the LVS world(although I've been in linux for years),
> so pardon my ignorance on some of the topics/technologies. The short
> story is that I'm running ubnutu 8.04 LTS x64. I'm trying to set up
> ldirectord on a standalone box for now(I'll juice it up with heartbeat
> in a few weeks). Below is a quick list of configs and outputs. The
> problem I'm running into is that, while ipvsadm shows my VIP and RIP's
> all up and functioning, nothing is listening on the VIP:port shown by
> ipvsadm -L -n. I've followed
> http://www.howtoforge.com/set-up-a-loadbalanced-ha-apache-cluster-ubuntu
> 8.04 as my setup guide, save that I didn't add heartbeat to the mix.
Hi Tim,
the quick answer to your question is that ldirectord isn't supposed
to bind to VIP:port and this shouldn't be a problem.
The slightly longer answer is that ldirectord effects load balancing by
configuring LVS, which lives in the kernel and acts much more like a router
than a proxy. As such, it does not bind a socket to VIP:port. Rather, as
packets pass through the kernel's networking code they will be processed by
LVS if they match the VIP:port specified _and_ those packets would
otherwise have been delivered to a local process (this is one area where
LVS isn't quite like a router). Typically second criteria is satisfied by
placing the VIP on a local interface.
--
Simon Horman
VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
H: www.vergenet.net/~horms/ W: www.valinux.co.jp/en
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