Chapter 22. HTTP Services

Procedure 22.3. Configure a basic cluster with NSAPI

1. Define the paths to serve via NSAPI

   Edit the SJWS/PROFILE/config/obj.conf file. Define paths that should be served via NSAPI at the end of the default Object definition, as shown:

   <Object name="default">
         [...]
      NameTrans fn="assign-name" from="/status" name="jknsapi"
      NameTrans fn="assign-name" from="/images(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/css(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/nc(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/jmx-console(|/*)" name="jknsapi"
   </Object>

   You can map the path of any application deployed on your JBoss Enterprise Platform instance in this obj.conf file. In the example code, the /nc path is mapped to an application deployed under the name nc.

2. Define the worker that serves each path

   Edit the SJWS/PROFILE/config/obj.conf file and add the following jknsapi Object definition after the default Object definition.

   <Object name="jknsapi">
      ObjectType fn=force-type type=text/plain
      Service fn="jk_service" worker="worker01" path="/status"
      Service fn="jk_service" worker="worker02" path="/nc(/*)"
      Service fn="jk_service" worker="worker01"
   </Object>

   This jknsapi Object defines the worker nodes used to serve each path that was assigned to name="jknsapi" in the default Object.
   In the example code, the third Service definition does not specify a path value, so the worker node defined (worker01) serves all of the paths assigned to jknsapi by default. In this case, the first Service definition in the example code, which assigns the /status path to worker01, is superfluous.

3. Define the workers and their attributes

   Create a workers.properties file in the location you defined in Step 2. Define the list of worker nodes and each worker node's properties in this file, like so:

   # An entry that lists all the workers defined
   worker.list=worker01, worker02
   
   # Entries that define the host and port associated with these workers
   worker.worker01.host=127.0.0.1
   worker.worker01.port=8009
   worker.worker01.type=ajp13
   
   worker.worker02.host=127.0.0.100
   worker.worker02.port=8009
   worker.worker02.type=ajp13

Procedure 22.4. Configure a load-balancing cluster with NSAPI

1. Define the paths to serve via NSAPI

   Edit the SJWS/PROFILE/config/obj.conf file. Define paths that should be served via NSAPI at the end of the default Object definition, as shown:

   <Object name="default">
         [...]
      NameTrans fn="assign-name" from="/status" name="jknsapi"
      NameTrans fn="assign-name" from="/images(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/css(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/nc(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/jmx-console(|/*)" name="jknsapi"
      NameTrans fn="assign-name" from="/jkmanager/*" name="jknsapi"
   </Object>

   You can map the path of any application deployed on your JBoss Enterprise Platform instance in this obj.conf file. In the example code, the /nc path is mapped to an application deployed under the name nc.

2. Define the worker that serves each path

   Edit the SJWS/PROFILE/config/obj.conf file and add the following jknsapi Object definition after the default Object definition.

   <Object name="jknsapi">
      ObjectType fn=force-type type=text/plain
      Service fn="jk_service" worker="status" path="/jkmanager(/*)"
      Service fn="jk_service" worker="router"
   </Object>

   This jknsapi Object defines the worker nodes used to serve each path that was assigned to name="jknsapi" in the default Object.

3. Define the workers and their attributes

   Create a workers.properties file in the location you defined in Step 2. Define the list of worker nodes and each worker node's properties in this file, like so:

   # The advanced router LB worker
   worker.list=router,status
   
   # Define a worker using ajp13
   worker.worker01.port=8009
   worker.worker01.host=127.0.0.1
   worker.worker01.type=ajp13
   worker.worker01.ping_mode=A
   worker.worker01.socket_timeout=10
   worker.worker01.lbfactor=3
   
   # Define another worker using ajp13
   worker.worker02.port=8009
   worker.worker02.host=127.0.0.100
   worker.worker02.type=ajp13
   worker.worker02.ping_mode=A
   worker.worker02.socket_timeout=10
   worker.worker02.lbfactor=1
   
   # Define the LB worker
   worker.router.type=lb
   worker.router.balance_workers=worker01,worker02
   
   # Define the status worker
   worker.status.type=status