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Managing Node Agents

Each managed node requires an HPjmeter node agent that manages communication between the console and JVM agents.

Once the Session Preferences window closes, and after waiting for a few moments, you should see the running JVM agents listed below the connected server host name. If no JVM appears, check that a node agent is running on that server. If no node agent is running, the console cannot show the JVM agents.

On HP-UX, you can run the node agent as a daemon or service for automatic, continuous operation, or as a manual process when you do not need continuous operation.

Managing Node Agents On HP-UX

Running Node Agent as a Daemon

When you install HPjmeter on HP-UX systems, you can start the node agent as a daemon for continuous automatic operation.

NOTE: Though you can run the node agent continuously, the node agent is not a high availability application.

As a daemon, the node agent can use an alternate port number. To specify a different port number, edit the /sbin/init.d/HPjmeter_NodeAgent file, add the -portoption, and manually start the node agent.

To start or stop the node agent daemon on HP-UX PA and IA:

$ /sbin/init.d/HPjmeter_NodeAgent startstop

To change default options, such as port number, edit the contents of the file.Verifying HP-UX Daemon is Running

When the node agent is running as a daemon on a HP-UX system, use these steps to verify that the node agent is running:

1.You must be logged in with root permissions.2.Check that these files exist:•/sbin/init.d/HPjmeter_NodeAgent•/sbin/rc3.d/S999HPjmeter_NodeAgent

3.Use the ps command, or its equivalent on your system: $ ps -ef grep node

The result should show:

$ JMETER_HOME/bin/nodeagent -daemon where

JMETER_HOME=/opt/hpjmeter

The –daemonflag indicates that the node agent is running as a daemon.To start or stop the node agent daemon manually:

$ /sbin/init.d/HPjmeter_NodeAgent startstop

Starting Node Agents Manually

If you cannot use the node agent daemon or you need to set up access restrictions, you can start a node agent manually. For information about access restrictions, see Working with Firewalls (page 21).

A node agent must be running before the console can connect to a managed node to discover your applications and open monitoring sessions.

Managing Node Agents 37