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On Tue, 14 Mar 2006, Ken Brownfield wrote:
I've done a lot of googling and archive searching, so I've
seen the general fwmark state tracking described.
Reading this, it seems like this patch isn't exactly
approved or even obviously available. And the article is
from 2002. :)
-sh scheduling is a standard (but little used) part of LVS.
AFAIK, you just set up the -SH scheduling and go - there's
no patching. There isn't much in the way of examples in the
HOWTO. I just looked in the mailing list archive and there's
no useful info there either (just me asking if anyone has
used it, and making comments to people like you that it's
available).
It looks like we're still waiting for the first user to get
it going.
I'm also not sure why this seems like such a difficult
problem. If LVS honored routes, there would be no
complicated hacks required.
LVS doesn't know anything about routes to the outside world
- it just pushes a packet with src_addr=VIP,dst_addr into
the output queue. However netfilter gets it before it exits
from the director.
This is how it was for 2.0 and 2.2 kernels. How it works for
2.4 I don't know.
http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-NAT.html#lvs_nat_src_addr_reply
This is peripheral to your interest but just in case
http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.dynamic_routing.html
Unless LVS overrides routes, in which case it might be
nice to have a switch to turn off that optimization.
setting up routes as you've done is tricky. Since the
iproute2 tools were around when the -SH scheduler was
written, I would assume the iproute2 tools won't do what you
want.
Netfilter and LVS had some unfortunate interactions
http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.filter_rules.html#filter_rules_intro
Julian's nfct code is not used much so we don't hear a lot
about it. It came after the -SH scheduler. Maybe the -SH
scheduler shouldn't be neede if the netfilter problems
really have been cleaned up.
Would be glad to hear of anything you figure out.
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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