Node manager configuration on Weblogic server

Node manager configuration:

Weblogic server having two types of versions, one is java based and another one is script based. Each configuration having different ways, but functionality is almost same.

Java-based Node Manager runs within a Java Virtual Machine (JVM) process. It is recommended that you run it as a Windows service on Windows platforms and as an operating system service on UNIX platforms, allowing it to restart automatically when the system is rebooted.

This version of Node Manager determines its configuration from the nodemanager.properties file

Java-based Node Manager provides more security than the script-based version.

For UNIX and Linux systems, WebLogic Server provides a script-based version of Node Manager. This script is based on UNIX shell scripts, but uses SSH for increased security. SSH uses user-id based security.This version does not provide as much security as the Java-based version. However, the advantage of the script-based Node Manager is that it can remotely manage servers over a network that has been configured to use SSH. No additional server installation is required. The scripts merely have to be copied to the remote machine.

Determining Which Node Manager Version to Use

Which version of Node Manager to use depends on the requirements of your WebLogic Server environment. The following considerations can help you decide which version is ideal for your environment:

• If you are installing WebLogic Server on a Windows system, you must use the Java version of Node Manager. The scripted version of Node Manager is not supported on Windows.
• In order to use db-less leasing (consensus leasing) you may see faster performance when using the Java version of Node Manager.
• The script-based Node Manager requires a much simpler security configuration than the Java version. RSH and SSH are generally easier to configure than SSL which is the security method used by the Java version of Node Manager. The script version of Node Manager also requires a smaller footprint than the Java version.
• The Java version of Node Manager can be used in conjunction with inetd on supported UNIX systems. inetd allows Node Manager to be automatically restarted upon receiving a request on the configured port.

For accessing node manager from console;

from the EnvironmentsMachinesConfigurationNode Manager

Using WLST, we can configure or we can run using offline mode:

for start,stop and monitor managed servers and also will retrieve node manager logs as well as  managed servers logs.

Refer oracle documentation for more detailed info:

http://docs.oracle.com/cd/E12840_01/wls/docs103/nodemgr/overview.html#wp1074915