Hello, everyone, I am just getting the hang of LVS and am using a virtual machine (OpenVZ-based) setup for this purpose. I have run into a very strage problem while testing: the client can only connect to a RS if tcpdump runs on the director.
My setup involves 4 virtual machines, one simulating the client and 3 real servers. The host node acts as a director. The three real servers are connected to a bridge, br0, in 10.0.0.0/8 network. Thus, RIP=10.0.0.x. The client is in network 192.168.0.0/24, with CIP=192.168.0.50 and VIP=192.168.0.50. The host has a masquerade rule for the RIPs. Now, all the machines communicate properly, questions 1-3 from [1] are all right -- I'm not very savvy at reading tcpdump output, so I'm not sure about the fourth. Problem is, while testing, I've noticed that if I run a tcpdump, for instance tcpdump -i any -ln host 192.168.0.50 on the director, wget just works, repeatedly (hence, on different real servers). Otherwise, if tcpdump is not running on the director, client receives 'Connection refused' on VIP. If tcpdump is running on a RS, I invariably get 'Connection refused' (I've tried multiple times, to account for scheduling. Here is the configuration on the director, though I suspect that, given the symptoms, I could not have messed it up. srisp-lab:~# ipvsadm IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP srisp-lab.local:www rr -> realserver3:www Masq 1 0 0 -> realserver2:www Masq 1 0 0 -> realserver1:www Masq 1 0 0 [1] http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-NAT.html#lvs_nat_julians_setup Has anyone encountered a similar issue? Am I somehow missing the obvious? Thanks in advance, Vlad _______________________________________________ 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