Adding a node to a cluster

Add a node to an existing cluster.

Before you begin

You must already have a cluster with at least one member.

Ensure that you installed IBM® WebSphere® Application Server Network Deployment (Application Server option) on the new node.

About this task

To add a node to a cluster, complete the following steps:

Procedure

  1. Add a node to the DM cell:
    1. Log on to the new node.
    2. Open a command prompt and change to the bin directory of the local WebSphere® Application Server profile:

      app_server_root/profiles/profile_name/bin

      where profile_name is the name of the applicable WebSphere® Application Server profile on this node.

    3. Run the addNode command to add this node to the DM cell: .

      addnode [dmgr_host] [dmgr_port] [-username uid] [-password pwd] [-localusername localuid] [-localpassword localpwd]

      where
      • dmgr_host is the host name of the Deployment Manager
      • dmgr_port is the SOAP port of the deployment manager (the default is 8879)
      • uid and pwd are the DM administrator user name and password
      • localuid and localpwd are the user name and password for the WebSphere® Application Server administrator of the node
    4. Open the addNode.log file and confirm that the node was successfully added to the DM cell. The file is stored in the following location:

      app_server_root/profiles/profile_name/log/addNode.log

  2. Copy the relevant JDBC files from the DM node to this node, placing them in the same location as the JDBC files on the DM. If, for example, you copied the db2jcc.jar file from the C:\IBM\SQLLIB directory on the DM, you must copy the same file to the C:\IBM\SQLLIB directory on this node. See the following table to determine which files to copy. See the following table to determine which files to copy:
    Table 1. JDBC files
    Database type JDBC files
    DB2®

    db2jcc.jar

    db2jcc_license_cu.jar sql
    Oracle

    ojdbc6.jar
    SQL Server

    sqljdbc4.jar
  3. Ensure that the shared folders that are used for the application content stores in the cluster are accessible from the new node: from the new node, try to access the shared directories.
  4. Add additional members to an existing HCL Connections cluster:
    1. Log on to the Deployment Manager Integration Solutions Console.
    2. Click Servers > Clusters > cluster_name > Cluster members > New. Specify the following information about the new cluster member:
      Member name
      The name of the server instance that is created for the cluster. The DM creates a server instance with this name.
      Note: Each member name in the same cluster must be unique. The Integration Solutions Console prevents you from reusing the same member name in a cluster.
      Select node
      The node where the server instance is located.

      Click Add Member to add this member to the cluster member list.

    3. Click Next to go to the summary page where you can examine detailed information about this cluster member. Click Finish to complete this step or click Previous to modify the settings.
    4. Click Save to save the configuration.
    5. Click Server > Servers > Clusters > cluster_name > Cluster members. In the member list, click the new member that you added in the previous step.
    6. On the detailed configuration page, click Ports to expand the port information of the member. Make a note of the WC_defaulthost and WC_defaulthost_secure port numbers. For example, the WC_defaulthost port number is typically 9084, while the WC_defaulthost_secure port number is typically 9447.
    7. Click Environment > Virtual Hosts > default_host > Host Aliases > New. Enter the following information for the host alias for the WC_defaulthost port:
      Host name
      The IP address or DNS host name of the node where the new member is located.
      Port:
      The port number for WC_defaulthost. For example, 9084.

      Click OK to complete the virtual host configuration.

    8. Click Save to save the configuration.
    9. Repeat the previous two sub-steps to add the host alias for the WC_defaulthost_secure port.
    10. Click System administration > Nodes.
    11. In the node list page, select all the nodes where the target cluster members are located and then click Synchronize.
  5. Review the configuration of the application server added to the cluster.
    JVM settings need to be adapted to equal the other existing application servers in the cluster. Refer to Reviewing the JVM heap size. Other configuration settings to consider reviewing include webcontainer threads and session timeouts settings.
    Note: Custom properties set on the existing application servers need to be reapplied to any new node and server post-installation. Find these properties in WAS > Application server > [server name] > Session management > Custom properties.
  6. Enable the Startup beans service at server startup. Open the WebSphere Integrated Solutions Console.
    1. Click Servers > Server types > WebSphere Application Servers > server_name.
    2. In Container Settings, expand Container Services. Then click Startup beans service.
    3. In General Properties, check the box next to Enable Service at server startup.
    4. Click OK.
    5. Restart the server.
    For more information, see Startup beans service settings.
  7. Configure IBM® HTTP Server to connect to this node. For more information, see the Configuring IBM® HTTP Server and Defining IBM® HTTP Server topics.
  8. Repeat this procedure for each new node that you want to add to a cluster.
  9. Perform these additional steps to add the Search application to a new node.

Results

If you experience interoperability failure, you might be running two servers on the same host with the same name. This problem can cause the Search and News applications to fail. For more information, see Application access problems in the WebSphere Application Server Network Deployment product documentation, and select NameNotFoundException from JNDI lookup operation.