Adding the Web server cluster

The next step is to add the Web server cluster to the Load Balancer configuration. In our case the cluster name is cluster.itso.ibm.com and the IP address is 10.20.10.100.

Note: If your hosts are not defined in an DNS server, you need to add the host names and IP addresses to the C:\winnt\system32\drivers\etc\hosts file of each system. For our environment, we added the entries listed in Example 7-2 to our lb, web1, and web2 hosts. Example 7-2 /etc/hosts sample ... 10.20.10.100     cluster.itso.ibm.com     cluster 10.20.10.101     cproxy.itso.ibm.com      cproxy 10.20.10.102     lb.itso.ibm.com          lb 10.20.10.103     web1.itso.ibm.com        web1 10.20.10.104     web2.itso.ibm.com        web2 ... AIX: On the AIX platform, the file is location is /etc/hosts.

To add a new cluster:

1. Start the Executor by right-clicking Host: lb on the Load Balancer administration GUI and select Start Executor from the pop-up menu, as shown in Figure 7-8.

Figure 7-8 Starting the Executor

2. After starting the Executor, you need to add the cluster to the configuration. This is done by right-clicking Executor and selecting Add Cluster..., as shown in Figure 7-9.

Figure 7-9 Adding the cluster

3. On the Add a cluster window enter an arbitrary name for the cluster. As mentioned before, we are using cluster.itso.ibm.com.

4. Enter the appropriate IP address in the Cluster address field, in our case 10.20.10.100.

5. Select the Configure this cluster option, as shown in Figure 7-10, then click OK.

Figure 7-10 Adding a cluster window

6. Click OK and accept the defaults when the Configure cluster address window appears.

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