On 05/23/2012 03:39 PM, m.roth at 5-cent.us wrote: > Wessel van der Aart wrote: >> Hi List, >> >> I've setup 2 openldap servers in n-way multimaster replication mode in a >> test environment, both run centos 6.2, >> this works well but now i'm trying to make these 2 servers failover >> using heartbeat. >> i've got no experience with heartbeat (or setting up clusters in >> general) however from what i understand heartbeat starts/stops the >> service if the server has the virtual IP assigned or not. >> this would be fine for httpd , but since replication doesn't work when >> slapd is stopped i was wondering if anyone knows if there is a way to >> setup heartbeat with a hot standby? so that the service keeps running >> but the ip does gets reassigned when one goes down. > A slight clarification: what happens on a failover cluster is that you've > got heartbeat running, and each machine looks to see if the other's still > alive. At this point, one is live, and the other's standby. If/when the > standby notices it cannot see - even a ping - the other address, or it can > be configured to look for a service, such as doing a default search (for > apache, that might be a wget ImAlive.html) - it tells the system to assert > the IP, and turns up all services for which it's been configured. > > I haven't done it, but I'd say you could easily configure heartbeat to > check, and if the IP's visible, but the service times out, to tell the > live one to turn down services, and to take over primaryhood. > > Hope that's clearer. > > mark > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos Thanks Mark, that does make it more clear, i've made a setup and heartbeat does that by default, when heartbeat shuts down it's stops slapd as well and assignes the ip to machine2 and starts slapd there , what i want is that it already has slapd running on the failover but still checks that service for availability. that way i won't have an outdated database on the failover ldap server. would you know if there is a way of making heartbeat not sending the stop command to a particular resource or do i need write a script to (not) do this? i wouldn't mind a script but if that function is already there i'd rather use that one. Thanks, Wessel