Configure the Load Balancer

If you have one of more application servers, configure the load balancer to monitor the application servers.

Follow these steps:

Log in to an application server.
Copy the HealthServlet.war file from the $NX_ROOT/samples/HealthServlet directory to $NX_ROOT/bopcfg/www/CATALINA_BASE/webapps directory.
Restart CA SDM services or restart CA SDM Tomcat.
Repeat steps 1-3 for all the other application servers.
Configure the load balancer to monitor the following healthservlet URL on each application server:
```
http://<Machine_name>:<Port_number>/HealthServlet/GetHealth
```
- If a quescing response is received from the healthservlet URL of an application server, the load balancer must redirect all requests from that server to the other application servers. For example, the following response is received when the application server is quesced for 58677 seconds.
```
Quiesce time remaining :58677 seconds
```
- If an application server is healthy and no quescing is required, then the following response is received from the healthservlet of the server:
```
Currently no Quiesce time set. Return code : -1
```
Configure the session persistence on each load balancer. This process ensures that a request coming from one application server is routed back to the same application server.

After you have configured all the servers, ensure that each one is properly configured and available.

(For advanced availability configuration) Follow these steps:

Make sure that all background, standby, and application servers are running.
Log in to the background server Web UI.
Select System, Servers on the Administration tab.
The Server List page opens.
Verify that the Configured field displays Yes for the standby and application server records.
If Record Status is set to inactive, edit the server and set to Active. If you change the record status of any server, reconfigure it.
You have successfully configured servers for the advanced availability configuration.

Note: You can click any of the Local Host entries on the Server Details page to view the details of the server.

(For conventional configuration) Follow these steps:

Make sure that primary and all secondary servers are running.
Log in to the primary server Web UI.
Select System, Servers on the Administration tab.
The Server List page opens.
If Record Status is set to inactive, edit the server and set to Active. If you change the record status, ensure that you reconfigure that server again.
You have successfully configured the servers.