Clustering › Meet the Prerequisites

Meet the Prerequisites

To implement clustering successfully, meet its prerequisites.

To meet the prerequisites

1. Verify that no other application uses the following ports.

   By default, CA Service Catalog uses these ports for clustering, using the AJP protocol:

   • 8009 – for Service View communicating with Apache HTTP Server
   • 8019 – Service Fulfillment communicating with Apache HTTP server
2. Perform this step if applicable; otherwise, skip it.

   If another application uses one of these port numbers, eliminate the duplication by using a different port number for either CA Service Catalog or the other application.

   If you use a different port number for CA Service Catalog, then also replace the old port number with the new port number in the applicable clustering topics in this documentation. For example, if you change 8009 to a different port number, use the new port number instead of 8009 when you set up horizontal clustering for Service View.

3. Locate and record the multicast address in the server.xml file.

   This address is the value of the mcastAddr attribute within the Membership tag. This value is typically 228.0.0.4, as shown in the following sample specification:

   <Membership className="org.apache.catalina.cluster.mcast.McastService" mcastAddr="228.0.0.4" mcastPort="45564" mcastFrequency="500" mcastDropTime="3000" /> 
   

4. Verify that each clustered computer can ping this multicast address.

   If each clustered computer can ping the multicast address, then skip rest of the steps in this topic. If not, then complete the remaining steps.

5. Run the following command at the DOS prompt of each clustered computer:

   netsh interface ip show joins 
   

   The system displays all the multicast addresses that this computer can ping.

6. Determine a common multicast address that all clustered computers can ping.
7. Update the mcastAddr value in the server.xml file on all clustered computers to use the common multicast address that you determined in the previous step.

   Note: Update this file on all clustered computers before proceeding to the next step.

8. Restart the CA Service Catalog Windows service on all clustered computers.
9. Optional) Repeat the previous steps to set up a second environment, if applicable.

   Note: If you use the same multicast address for both environments, use a different multicast port number for each environment.

You have met the prerequisites.