Ok feel free to join the computers in mocking me; TCP
Checksum Offloading I thought I had it covered; had turned this off most places but, evidently, not widely enough. Steve Wray wrote: > Hi there, > > I have a 2-node cluster with a couple of load balancers in > active/passive configuration using heartbeat for failover. > > This is all under Xen virtualisation on two physical hosts; one load > balancer virtual machine on each physical host. The load balancers are > connected via heartbeat in an active/passive configuration. > > The load balancer sends http requests to one of two webserver virtual > machines which are behind it, each on one of the physical hosts. > > I am running into a problem where: > > I have a virtual machine running on the same physical host as the active > load balancer and on the same network as the front-side of the load > balancers and their floating IP address. > > From this VM any http connections are only served by one of the > load-balanced webservers. > > 50% of the time the HTTP connection times out. I believe that the load > balancer is trying to balance these connections between the webservers > but that one of these webservers either does not see it or cannot > properly respond. > > In the webserver logs I can see that the webserver running on the same > hardware node as the active load balancer is the one which serves the > requests; the other webserver does not have these in its logs. > > HTTP connections from the identical VM running on the other hardware > node, ie not where the currently active load balancer is running, are fine. > > The setup works fine in other respects and has been in service for some > months now. > > I have no idea whats going on, the computers are mocking me :( > > My ldirectord.conf: > > checktimeout=10 > checkinterval=2 > autoreload=no > logfile="local0" > quiescent=yes > > virtual=xxx.yy.zz.ww:80 > fallback=127.0.0.1:80 masq > real=192.168.0.4:80 masq 10 > real=192.168.0.3:80 masq 10 > service=http > request="ldirector.html" > receive="Test Page" > scheduler=rr > protocol=tcp > checktype=negotiate > > (obfuscated external IP address, it isn't really xxx.yy.zz.ww) > > _______________________________________________ > LinuxVirtualServer.org mailing list - [email protected] > Send requests to [EMAIL PROTECTED] > or go to http://lists.graemef.net/mailman/listinfo/lvs-users _______________________________________________ LinuxVirtualServer.org mailing list - [email protected] Send requests to [EMAIL PROTECTED] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
