snip -- "I have setup LVS-DR using IPTables." Then why are you using a loopback adapter as well?
You only need to use one method iptables REDIRECT .... or ... loopbackadapter + arptables settings SYN_RECV means the real server is not replying when hit with a packet that says Hi are you the VIP? On 28 February 2014 19:21, Bruce Rudolph <[email protected]> wrote: > I have an LVS-DR cluster which has been running for seven months without > a hitch. Recently, the cluster started to timeout on the majority of > connections. Some connections were passed through to a real server and > processed. I have tried for a week to figure out what happened. What I > found was that one real server out of five is connecting and servicing > the client request. The other four real servers have the HTTP connection > stuck in the SYN_RECV state until it times out (60 seconds). > > In summary, I have seven CentOS 6.4 servers (kernel > 2.6.32-358.18.1.el6.x86_64). Two servers are configured as load > balancers (a primary and a backup) and five real servers. I have setup > LVS-DR using IPTables. The servers have a public IP bound to a NIC > device and an internal VLAN bound to a second NIC. The VIP is configured > on the real servers local loopback (lo:0) device. The > /etc/sysconfig/ha/lvs.cf was setup properly and everything was running > successfully for seven months. > > We installed new versions of our software for the web service we are > running. Nothing network related. All five real servers were updated the > same way. I am comparing the one working real server from the four that > are not working. So far I have found nothing. > > Any ideas on trouble shooting points? > > -- > Best Regards, > Bruce > > > _______________________________________________ > Please read the documentation before posting - it's available at: > http://www.linuxvirtualserver.org/ > > LinuxVirtualServer.org mailing list - [email protected] > Send requests to [email protected] > or go to http://lists.graemef.net/mailman/listinfo/lvs-users -- Regards, Malcolm Turnbull. Loadbalancer.org Ltd. Phone: +44 (0)870 443 8779 http://www.loadbalancer.org/ _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
