Sun Java System Web Server 7.0 Update 4 Administrator's Guide

Setting Up a Cluster

This section describes the procedure to set up the cluster and enable reverse proxy to support load-balancing on HTTP requests.

The following flowchart illustrates the procedure to set up a cluster.

Figure 4–3 Flowchart illustrating the cluster set up

Flowchart illustrating the steps to set up a cluster.

  1. On one of the nodes, install Web Server that acts as the Administration Server in a cluster.

  2. On the other three nodes, install the Web Server. Select the option of installing Web Server as an Administration Node. During the installation, choose the option of registering the node with the server.

  3. Make sure the Administration Server is using SSL port for communication, as an Administration Node can be registered with the server only in secure mode.

  4. Make sure the system date and time on all the nodes where the Administration Server and the Administration Nodes are installed are the same. The certificate associated with the server is created based on the system date and time of the node where the Administration Server is installed. If the system date of the Administration Node is earlier than the Administration Server, the registration fails as the certificate of the Administration Server will not yet be valid. As a corollary, the certificate may be deemed valid if it is has expired.

  5. Start the Administration Server from the install_dir/admin-server/bin/ directory.


  6. Start the wadm command-line tool from the Administration Node. The wadm command-line tool is located in the install_dir/bin directory.


  7. Register each Administration Node with the Administration Server. Use the register-node command to register each node with the server.

    For Example:

    ./wadm register-node -user=admin --port=8989


    is the host name of the Administration Server to which you are registering the Node.


    is the SSL Port number of the Administration Server.

  8. You will be prompted to enter the administration password. Enter the administration password of the Administration Server.

    The Administration Server authenticates by the Administration Server trusting the Administration Node's server certificate and the Administration Node trusting the client certificate presented by the Administration Server. During registration of an Administration Node, the Administration Server generates a server certificate for that Administration Node, which is then downloaded and installed on the Administration Node. The issuer of the server certificate is also installed on the Administration Node.

    Note –

    The registration can be done only over SSL.

    For information about registering nodes, see Registering the Administration Node From the Command-Line in Sun Java System Web Server 7.0 Update 4 Installation and Migration Guide.

  9. Start all the Administration Nodes using the startserv command from the install_dir/admin-server/bin/ directory.

  10. Using the Admin Console or the CLI, create a new configuration in the Administration Server.

    Provide configuration information such as configuration name, HTTP Listener port, and the server name for the new configuration.

  11. Create instances of the configuration on all the nodes.

  12. Start the instances on all the nodes.

    Note –

    Web Server provides the flexibility to expand or reduce your cluster. You can add or remove instances to the cluster at any point of time.