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On Wed, 19 Dec 2007, Martijn Grendelman wrote:
> Since a while, directing traffic to the other machine (not the director)
> doesn't work anymore,
you don't remember changing anything I suppose? Any info
there would go a long way to figuring out the problem.
> BUT ONLY on a specific VIP:PORT combination.
> During my tests, the LVS setup is as follows:
>
> martijn@whisky:~> rr ipvsadm -L -n
> IP Virtual Server version 1.2.1 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
> -> RemoteAddress:Port Forward Weight ActiveConn InActConn
> TCP 213.207.104.20:80 sh
> -> 213.207.104.11:80 Route 500 0 0
> TCP 213.207.104.20:81 sh
> -> 213.207.104.11:81 Route 500 0 0
> TCP 213.207.104.50:80 sh
> -> 213.207.104.11:80 Route 500 0 0
>
> Note that all references to the local node have been temporarily
> removed.
removed on the machine (rather than removed from the
output)?
> Now, the service defined second (port 81) works. The third one,
> port 80, but a different VIP, works too. The first one, the one that I
> need, does not.
the first and third VIP are both going to the same
realserver. I take it that you have two VIPs on that
realserver? I expect both the realserver and ipvsadm on the
director should be able to handle this, but maybe not. If
you delete the 3rd entry, can you now get to the service
defined by the 1st entry?
I don't have great hope for this solution though.
> When I connect to 213.207.104.20:80, I see some kind of SYN storm on
> both the director and the real server on 213.207.104.11:
>
> 14:37:42.232694 IP 84.246.10.24.41053 > 213.207.104.20.80: S
> 557344343:557344343(0) win 5840 <mss 1460,sackOK,timestamp 218577173
> 0,nop,wscale 7>
> 14:37:42.232961 IP 84.246.10.24.41053 > 213.207.104.20.80: S
> 557344343:557344343(0) win 5840 <mss 1460,sackOK,timestamp 218577923
> 0,nop,wscale 7>
don't see anything to/from the realserver here, but I don't
know what it would tell me though. All packets from the
realserver should go back to the internet, not to the
director.
--
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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