Create clusters using scripting

Use the wsadmin tool to create application server, generic server, and proxy server clusters. A cluster is a set of servers managed together as a way to balance workload.

There are multiple ways to complete this task. This topic uses the AdminConfig object to create clusters in the environment. Alternatively, we can use the ClusterConfigCommands command group for the AdminTask object or the createCluster script in the AdminClusterManagement script library to create and configure clusters.

Tasks

1. Start the wsadmin scripting tool.
2. Identify the server to convert to a cluster.

   Determine the configuration ID of the server of interest and assign it to the server variable:

   • Use Jacl:

     set server [$AdminConfig getid /Cell:mycell/Node:mynode/Server:server1/]
     

   • Use Jython:

     server = AdminConfig.getid('/Cell:mycell/Node:mynode/Server:server1/')
     

3. Convert the existing server to a cluster.

   Use the convertToCluster command for the AdminConfig object to convert the existing server to a cluster. Specify the name of the server and the name to assign to the cluster.

   • Use Jacl:

     $AdminConfig convertToCluster $server myCluster1
     

   • Use Jython:

     AdminConfig.convertToCluster(server, 'myCluster1')
     

   Example output:

   myCluster1(cells/mycell/cluster/myCluster1|cluster.xml#ClusterMember_1)
   

4. Save the configuration changes.

   AdminConfig.save()
   

5. In a network deployment environment only, synchronize the node.

   Use the syncActiveNodes script in the AdminNodeManagement script library to propagate the changes to all active nodes:

   AdminNodeManagement.syncActiveNodes()
   

Related:

Clusters and workload management

Create clusters

wsadmin AdminConfig

Create a proxy server cluster

Cluster configuration scripts

Commands for the AdminConfig object