Create cluster members

Use wsadmin.sh to create cluster members in application server, generic server, web server, and proxy server clusters.

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

The template options are available only for the first cluster member that we create. All cluster members that we create after the first member will be identical. A template is stored in the cluster scope that use to create additional cluster members.

1. Start the wsadmin scripting tool.
   

2. There are two ways to perform this task. Choose one of the following:

   • Use the AdminTask object:

     • Jacl:

       $AdminTask createClusterMember {-interactive}

     • Jython:

       AdminTask.createClusterMember ('[-interactive]')

   • Use the AdminConfig object:

     1. Identify the existing cluster and assign it to the cluster variable:

        • Jacl:

          set cluster [$AdminConfig getid /ServerCluster:myCluster1/]

        • Jython:

          cluster = AdminConfig.getid('/ServerCluster:myCluster1/')
          print cluster

        Example output:

        myCluster1(cells/mycell/clusters/myCluster1|cluster.xml#ServerCluster_1)

     2. Identify the node to create the new server and assign it to the node variable:

        • Jacl:

          set node [$AdminConfig getid /Node:mynode/]

        • Jython:

          node = AdminConfig.getid('/Node:mynode/')
          print node 

        Example output:

        mynode(cells/mycell/nodes/mynode|node.xml#Node_1)

     3. Optional. Identify the cluster member template and assign it to the serverTemplate variable:

        • Jacl:

          set serverTemplate [$AdminConfig listTemplates Server]

        • Jython:

          serverTemplate = AdminConfig.listTemplates('Server')
          print serverTemplate

        Example output:

        server1(templates/default/nodes/servers/server1|server.xml#Server_1)

     4. Create the new cluster member, using the createClusterMember command.

        • The following example creates the new cluster member, passing in the existing cluster configuration ID, existing node configuration ID, and the new member attributes:

          • Jacl:

            $AdminConfig createClusterMember $cluster $node {{memberName clusterMember1}}

          • Jython:

            AdminConfig.createClusterMember(cluster, node, [['memberName', 'clusterMember1']])

        • The following example creates the new cluster member with a template, passing in the existing cluster configuration ID, existing node configuration ID, the new member attributes, and the template ID:

          • Jacl:

            $AdminConfig createClusterMember $cluster $node {{memberName clusterMember1}} $serverTemplate

          • Jython:

            print AdminConfig.createClusterMember(cluster, node, [['memberName', 'clusterMember1']], serverTemplate)

          Example output:

          clusterMember1(cells/mycell/clusters/myCluster1|cluster.xml$ClusterMember_2)

3. Save the configuration changes.

   Use the following command example to save the configuration changes:

   AdminConfig.save()

4. 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 tasks

Modify cluster member templates

Use the wsadmin scripting AdminConfig object for scripted administration

Create a cluster: Create additional cluster members

Cluster configuration scripts

Commands for the AdminConfig object

Create a cluster: Create first cluster member