wsadmin script for creating cluster and adding cluster members

You can use this Jython script to create cluster and add members to it

AdminTask.createCluster('[-clusterConfig [-clusterName samplecluster] -replicationDomain [-createDomain true]]')

AdminTask.createClusterMember('[-clusterName samplecluster -memberConfig [-memberNode dmgrNode01 -memberName SampleMember1 -memberWeight 2 -replicatorEntry true] -firstMember [-templateName "Sample Template" -nodeGroup DefaultNodeGroup -coreGroup DefaultCoreGroup]]')

AdminTask.createClusterMember('[-clusterName samplecluster -memberConfig [-memberNode sunpatilNode02 -memberName SampleMember2 -memberWeight 2 -replicatorEntry true]]')


This script creates samplecluster by calling AdminTask.createCluster command and then creates SampleMember1 as cluster member using AdminTask.createClusterMember call. The AdminTask.createClusterMember is made for adding additional cluster members

Managing cluster member

After creating a cluster you can add members to it by following these steps

• In the WAS Admin Console, go to Servers - cluster - cluster_name


• On the cluster configuration page, expand the Cluster Member section like this
  
  


• Click on the details button to get cluster members listing. You can either add or remove cluster members from this page
  


• I want to create additional server on SunpatilNode02, so i did enter necessary information on the next page
  
  


• On the summary page click finish and it starts adding cluster member


• Once the cluster member is added you can verify the updated cluster topology
  
  

Creating cluster

Clusters consist of one or more application servers grouped together for Work load management. All the members in the cluster will have same set of application and similar configuration.

The way cluster creation works is you need to have one server which will act as Template server or you can create first cluster server based on existing template and then cluster creation process will take care of creating other servers based on the first server. Other servers can be on same machine (Vertical scaling) or on different machine(Horizontal scaling)

I wanted to create a cluster in which one server instance will be on the same machine as DMGR and other server will be on a separate machine. I already created a custom profile on separate machine and federated it to the DMGR so my node agent on machine 2 is ready.

• Now go to the WAS Admin Console and Server - Cluster and click on New


• On the first page it will ask you for Cluster Name so i entered Sample Cluster i did check the Configure HTTP Session memory-to-memory replication because i want distributed session support
  
  
  


• On the next page it will ask you information for the first cluster, This member will act as template for all other clusters. In my case instead of choosing existing server i choose to create new Server based on Sample Template
  
  
  


• On this page it will ask us to add additional cluster member i want to create one server on sunpatilNode2 so i selected that node and set SampleMember2 as server name
  
  
  


• On the summary page just click finish so that the cluster creation process can start
  
  
  


• It will take few minutes but once the cluster is created you can look at the details of the cluster by going to Server - Cluster - cluster_name tab.
  
  
  


• You can take a look at the topology of the cluster by going to Local topology tab