Why not to use ldap syncrepl feature instead of DRBD? On other hand what exactly are you trying to get? I don't think that you can build and active/active LDAP cluster using DRBD since LDAP caches it's database and doesn't provide mechanisms to synchronize caches, so your only choice would be active/passive cluster, in this case you just update an active node and make sure that you drbd and filesystem resources are collocated with LDAP.
On Wed, Feb 23, 2011 at 2:24 PM, Christopher Metter <christopher.met...@informatik.uni-wuerzburg.de> wrote: > Hi there, > > > I'm running a setup with a Heartbeat/DRDB cluster with 2 nodes and open > ldap database stored inside the DRDB-device. > No problem with the setup itself, it runs perfectly. > > > But I'm having following problem: How to update LDAP in a cluster? > The plan was to first run the update on the current slave device, then > manually failover and run update on the other device. > This was a very bad idea as LDAP needs to have access to its database > and as the slave has no mounted drdb-device, it fails and update stops. > > So is there any recommended update startegy or guide on how to update > LDAP inside a heartbeat/drdb cluster? > As the LDAP server needs to be online any downtime would be very bad. > > > I'm having some ideas on how to solve this problem but I'm not sure if > this is the real solution: > Situation: node1 is running heartbeat/drdb with ldap server up | node2 > is in slave mode > - Stop heartbead and drdb on node2 > - Start ldap server with an empty database on node2 > - Update ldap and everything else on node2 > - After successful update stop ldap on node2 > - Start Heartbeat/drdb on node2 > - Manual Failover -> node2 now master, node1 slave > - goto node1 and redo according steps > > > I hope you understand my concern and you can help me to fix this > update-mess. > > Is anyone out there with a solution or do you guys just handle it like > 'hitchhikers guide to galaxy' advises? > (Asking Hitchhikers Guide: How to Update LDAP in Heartbeat Cluster? - Don't! > http://www.imdb.com/title/tt0371724/quotes?qt0351093 ) > > > > Greetings from Germany, > Christopher Metter > _______________________________________________ > Linux-HA mailing list > Linux-HA@lists.linux-ha.org > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems > -- Serge Dubrouski. _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
