I am building a moodle cluster for my school. looking to use 6 servers.
LVS Load balancer x2 (heartbeat failover)
Webserver x2 (failover and load balancing)
BD/FS x2 (failover and load balancing)
I am running centos 5. I have setup all of the servers and have apache configured. I am going to setup the LVS after i get my DB issue sorted. I know I can run this all from one DB/FS server but I would like to have the failover ability built in but I might as well make it load balanced or it becomes no better than constant disk-sync. I have gotten moodle to work in a dedicated enviroment where it is the only thing running on the server and in a shared hosting enviroment but I need it in a cluster now. Any notes that I can see would be awesome.
I would like input about the Mysql clustering and FS mirroring/clustering. Also the loadbalancing would be awesome to see some notes on.
Can anyone give me some ideas for the DB cluster as I am new to this. all help would be greatly appreciated.