Sorry, I thought about database updates, not software updates. On Wed, Feb 23, 2011 at 2:33 PM, Serge Dubrouski <serge...@gmail.com> wrote: > 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. >
-- 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
