Installing the Lexmark Keep Alive service

The Lexmark Keep Alive service is a Windows service that queries the status of the software load balancer from the hardware load balancer in enterprise environments. The service is a web-based application that is used by other applications that serve as an HTTP client. It can be installed on the software load balancer or other machines.

Note: If you are upgrading from an older version of LDD to the latest one, then you must first uninstall the old Keep Alive service. Then you must install the latest version of the Keep Alive service.

From the computer, run the CD, and then navigate to the \tools\LDDKeepAliveService folder.
Run the LDDKeepAliveSetup.exe file, and then click Next.

Configuring the Mod JK status page of the Lexmark Keep Alive service

Do the following to establish communication between Apache 2.0 and the load balancer using the LDD Keep Alive service.

Configure the Apache httpd.conf file by accessing it at $(Install directory)\Apache2\conf\httpd (for example, C:\Program Files\Lexmark\Solutions\Apache2\conf\httpd).
Restart the Apache 2.0 service from the Services tab.
Install the LDD Keep Alive service.
Open the LDD Keep Alive service installation directory.
Access the LDD Keep Alive properties file.
Configure the digest authentication by enabling or disabling the authentication.support key-value pair.
Restart the LDD Keep Alive service from the Services tab.
To view information on the Tomcat servers, click any of the following URLs:
- http://[LddKeepAliveService IP]:7999/LDD/KeepAlive
- http://[LddKeepAliveService IP]:7999/LDD/KeepAlive/
- http://[LddKeepAliveService IP]:7999/LDD/KeepAlive/IP=[LB IP]
  Note: Click this URL if the Keep Alive service and LDD server are set up in different IPs.
Note: Alternatively, access the log files of the Keep Alive service to view information about the Tomcat servers.

Note: If either Apache 2.0 or the LDD Keep Alive service authentication is not configured properly, then it may prevent communication with the load balancer.

Changing the password of the JK Mod status page

Access the LDD installation directory of Apache 2.0 (for example, C:\Program Files\Lexmark\Solutions\Apache2).
Open the user.passwd file, and then change the password.
Notes:
- Use the format LDD:<MD5 hash of the string ldduser:LDD:ldd>.
- To calculate the MD5 hash, go to https://xorbin.com/tools/md5-hash-calculator.
Restart the Apache 2.0 service.
Change the password in the properties file.
Restart the LDD Keep Alive service.

Installing Lexmark Keep Alive service silently

Navigate to <LDD Installation directory>\install\Silent_Install_Script_Examples.
Run the command prompt as an administrator.
Run the Install_KeepAliveService.bat batch file.

Note: For help information, at the command prompt, type Install_KeepAliveService.bat /?.