Hi all, we have been using lvs in production with redhat rhel5 with direct routing successfully for years now. Maintenance of server was no problem, because setting the weight to 0 avoided new connections and we only had to wait for the current tcp-sessions to end on the maintained server.
But with our new rhel6-cluster we are having most of the time the problem that still new http-connections are being directed to the server that has a weight of 0, although we don't use persistent connections and there is no keepalive enabled in httpd.conf, so each tcp-connection ends after very short time. config: IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.0.1:http wlc -> lxweb1-stage:http Local 1 0 0 -> lxweb2-stage:http Route 1 0 0 Running stress test with ab from another server: ab -n 600000 -c 30 http://192.168.0.1/ IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.0.1:http wlc -> lxweb1-stage:http Local 1 12 14323 -> lxweb2-stage:http Route 1 10 13868 setting weight to 0: IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.0.1:http wlc -> lxweb1-stage:http Local 0 7 14317 -> lxweb2-stage:http Route 1 13 13888 a few minutes minutes later: IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.0.1:http wlc -> lxweb1-stage:http Local 0 12 14304 -> lxweb2-stage:http Route 1 8 13902 Running ipvsadm -Lnc | grep -v FIN_WAIT shows, that there are only a few established connections and some SYN_RECV. Repeating this command after a few seconds also makes clear, that there are no ports being reused from the ESTABLISHED-connections. So I have no idea why there are still active connections on the server with weight 0. Any hint is appreciated Thanks very much for your effort Best regards Tim _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
