With Portal Server 7.2, the steps to install portal on an AS cluster is
straight forward. It is just like creating multiple portal instances the
only difference being the instances belong to a cluster. The only
additional attribute to be set for the cluster specific instance is the
ClusterID attribute.
All it requires is to create an AS
cluster with the required number of instances and create a portal
instance for each of the clustered application server instances.
The cluster setup instructions page specifies how to create a simple cluster setup with 2 instances managed by a load balancer.
Adding
a new instance to the cluster is also straightforward. Create an
application server instance (e.g. newinstance) belonging to the
cluster (e.g pscluster). Then create a portal instance pointing to the
created appserver instance and the appserver cluster i.e, set
WebContainerInstanceName=newinstance and ClusterID=pscluster in the
WebContainer.properties.SJSAS91 file and run psadmin create-instance.