Elliot, Their are a couple of mechanisms to handle this, the behaviour that you probably want is:
net.ipv4.vs.expire_nodest_conn=1 expire the entry in table immediately and inform client that connection is closed. Also if you are using ldirectord to manage your lvs table you would probably use: quiescent=no i.e. on real server failure remove the entry completely from the LVS table On 22 September 2014 21:04, Elliott Barrere <elli...@barrere.us> wrote: > Hi guys - > > I'm having an issue with a 2-node setup (similar setup to what's described > here) where established sessions to a particular real server don't fail over > when that real server fails. That is, if a connection exists in the LVS > connection state table and that real server goes down, the connections to > that real server persist, rather than being cleared from the table as I would > expect. > > My test in a little more detail: > > 1) Start my service on realserver1 ONLY and open a connection (thus forcing a > connection to realserver1) > 2) Stop the service on realserver1 and start it on realserver2, verifying > "ipvsadm -Ln" shows realserver1 down and realserver2 up > 3) Establish a "new" connection to the VIP, forcing the same source port & IP > with nc > 4) The connection fails, trying to connect to realserver1 (verified by > tcpdump) > > It appears that this is because the state table still contains an entry for > "SRCIP:SRCPORT VIP:DSTPORT realserver1:DSTPORT". I am new to LVS, but I > assume this is not the expected behavior, because it seems it would be a > fairly typical scenario if both load balancers were, for example, behind a > PAT firewall. > > Can anyone shed some light on this, and how I might possibly fix it? I am > new to LVS so any help is appreciated! > > Cheers - > > elliott barrere | 206.351.3520 > > _______________________________________________ > 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 -- Regards, Malcolm Turnbull. Loadbalancer.org Ltd. Phone: +44 (0)330 1604540 http://www.loadbalancer.org/ _______________________________________________ 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