Hi, I am a long-time user of LVS, but now I've got a problem that I can't seem to solve. Searching the HOWTO and the web hasn't given me anything useful, so I turn to the experts now ;-)
I have a quite straightforward LVS-DR setup: two machines, both running a webserver on port 80, one of them directing traffic to either the local node or the other machine. I am using the 'sh' scheduler, as I have been for ages. Since a while, directing traffic to the other machine (not the director) doesn't work anymore, BUT ONLY on a specific VIP:PORT combination. During my tests, the LVS setup is as follows: [EMAIL PROTECTED]:~> 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. 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. 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> Mostly identical lines (and nothing else) keep appearing at a high rate, even after I kill the connection on the client. Only after I remove the service from LVS, this stops. Any idea what may cause this? I'd be happy to provide additional information, if needed. Best regards, Martijn Grendelman _______________________________________________ LinuxVirtualServer.org mailing list - [email protected] Send requests to [EMAIL PROTECTED] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
