[Linux-cluster] Can i use 2 nodes from a cluster?

[fosiul alam]

Hi

I am trying to build a redhat cluster with 4 nodes for High Availability
and load balancing.

example :

node1,node2,node3,node4 for apache service + Centralized Storage.

now when those 4 nodes are connecting into cluster, i can only use 1 node
at a time and when 1 node goes down then it shift all services into node2 .

but can i not use all 4 nodes a  time ??

example, i have a hardware load balancer, From this  can i not pass the
http trafiq to all 4 nodes ??

if not then how can i have load balanced between these 4 nodes ??

Thanks
Kind regards
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