after spending many hours in reading and reading on howto setup a fully functional working opsview instance on CentOS 5.5, i finally document everything ..
opsview is a product of http://www.opsview.com
INSTALL CentOS
We have two servers with two NICs. One NIC is for the heartbeat and the other to connect to the nework. We synchronize the Database via mysql-Replikation. First you need to Setup centOS on both servers. We parted our300GB harddisk like this. You can keep it like this.