>On Thu, 2009-12-17 at 16:37 +0100, Michael Schwartzkopff wrote: >> Am Donnerstag, 17. Dezember 2009 16:22:08 schrieb >> darren.mans...@opengi.co.uk: >> > I'm using ldirectord to load LVS modules rather than the ipvsadm >> > init script. Man ipvsadm says you need to start the ipvsadm sync >> > daemon using --start-daemon state and --stop-daemon. As ldirectord >> > is doing the loading / unloading of ipvsadm rules then I think the >> > ldirectord script itself needs to support ipvsadm daemon sync states? >> > >> > Regards >> > Darren >> >> Could be. But if you use a resource manager like pacemaker to control >> ldirectord the sync daemon would be switched off in the passive node. >> So no sync here. >> >> controlling the ldirectord in the cluster has the advantage that the >> cluster can react if the ldirectord dies. >> >> If you would like to have ldirectord also to control the sync of >> ipvsadm you would have to develop a multistate resource agent. Something >> like: >> - Stopped: sync and ldirectord stopped >> - Started as slave: sync started, ldir stopped >> - Started as master: sync and ldir started. > > >You can, without any negative result, run both master and backup sync daemon >on both hosts. I always have them set to a different sync-id, but perhaps >that's not even necessary: > >node1 $ ipvsadm --start-daemon master --syncid 50 >node1 $ ipvsadm --start-daemon backup --syncid 51 > >node2 $ ipvsadm --start-daemon backup --syncid 50 >node2 $ ipvsadm --start-daemon master --syncid 51 > >Just create a simple init script for it, or put it in rc.local. Maybe you >would have to do a modprobe vs or something similar before starting the >daemons if you don't have ipvs built into the kernel. > >I realize you could somehow create a fancier way than this, but i don't want >to make it more complicated. LVS is hard enough already. > >-- >Léon >
(now indenting in Kate) Thanks Léon. Turns out this is the easiest way. I've put this into /etc/ipvsadm.rules: node1: --start-daemon master --syncid 50 --start-daemon backup --syncid 51 node2: --start-daemon master --syncid 51 --start-daemon backup --syncid 50 And chkconfig'd ipvsadm on. The init script loads before OpenAIS so the daemon gets started before OpenAIS loads Pacemaker to load ldirectord to load the LVS rules :) I'll still look into putting it into the Pacemaker resource agent for ldirectord so anyone doing load-balancing on Pacemaker clusters will get connection state syncing for free. Regards Darren _______________________________________________ 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
