Jan Kalcic wrote: > Hi People, > > I'm going to set up a ha cluster for apache and mysql but reading the > documentation some doubts came in my mind as I'm not so export in this > kind of cluster. It's a two nodes active/passive cluster for a website. > A part of the local filesystem (website docs) has to be shared and > always in sync. For this purpose I am going to use drbd which as far as > I understood it allows me to shared local data between nodes. These two > nodes are also attached to a SAN where the mysql database will run on. > Here are the doubts. Should it be easier using the SAN only instead of > drbd?
If you have SAN storage, then you do not need to use drbd for either the web or the mysql filesystem. A suggested configuration would be: One SAN volume for the apache content. One SAN volume for the mysql database. The reason for having two volumes is that it will allow you to config heartbeat to run the apache+apache filesystem on one node, and the mysql server + mysql filesystem on the other, so you can spread the load. (There is no technical reason why you can't run drbd on top of SAN volumes, but it is another layer of un-needed complexity waiting to go wrong. The simplest config you can get away with is going to be the most reliable.) Cheers, Guy -- Dr. Guy Coates, Informatics System Group The Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH, UK Tel: +44 (0)1223 834244 x 6925 Fax: +44 (0)1223 496802 _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
