On 1 Mar 2012, at 11:25, Stefan Schloesser wrote: > My setup would involve 2 loadbalancer and 2 nodes. Are you saying that > running GlusterFs on both nodes using its replication feature is easier + > more reliable than DRBD + ocfs2 + pacemaker?
I can't compare reliability as I've never used DRBD, but gluster has worked fine for me for several years. Historically I've always found heartbeat etc very difficult to deal with, so I try to use it in as simple a way as possible, i.e. just managing a single IP. > And you use the haproxy/stunnel to monitor availability of the nodes (apache) > ? Yes, haproxy is pretty good at that and it works beautifully (and it has a nice status page too). My two nodes are set up identically with sysctl set to allow binding to non-local addresses so haproxy can be set to listen on the floating IP even when it's not on the local machine. stunnel is a very simple thing - it's just a pipe really. You could use pound instead (it has SSL integrated), but I prefer haproxy's config system. One key thing is that the servers don't have to DO anything at failover time - the software is all already up and running (and easily testable since it has its own IP), it just starts receiving traffic when it gets the floating IP. I happen to be running proxies and web servers on the same nodes, but you could split them up if you want - haproxy is extremely fast and uses almost no resources. Marcus -- Marcus Bointon Synchromedia Limited: Creators of http://www.smartmessages.net/ UK info@hand CRM solutions [email protected] | http://www.synchromedia.co.uk/ _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
