Objective

This article provides step-by-step instructions for upgrading the dependency environment of Controller 5.15.20 on Linux, focusing on OpenJDK.

Requirements

Omada Software Controller
OpenJDK-17

Introduction

Beginning with version 5.15.20, the Controller mandates the installation of OpenJDK 17 as a dependency. The following section provides a detailed guide on upgrading your pre-existing OpenJDK to OpenJDK 17 on Ubuntu.

Configuration

Please follow the steps below before upgrading the Omada Controller to version 5.15.20.

Step 1. Install OpenJDK - 17

sudo apt-get install OpenJDK-17-jdk-headless

Step 2. Change the default Java version.

sudo update-alternatives --config java

Change the default Java version.

Step 3. Enter the number corresponding to JDK 17. Here, enter 0.

Select the default Java version.

Step 4. Check the Java version. Switching to version 17 indicates that the JDK switch was successful.

java -version

Check the default Java version.

Step 5. Upgrade the Omada Controller.

sudo dpkg -i omada_v5.15.20.xxx.deb

FAQ

1. Is it necessary to upgrade MongoDB or JSVC when installing Controller 5.15.20?

Re. When upgrading the Linux Controller to version 5.15.20, there's no need to upgrade MongoDB and JSVC simultaneously. Starting from Controller version 5.15, it has been compatible with lower-version JSVC.

2. Does Controller 5.15.20 on a Linux system support higher versions of OpenJDK?

Re. The Linux Controller supports higher versions of OpenJDK, such as OpenJDK-21.

Conclusion

The above is the entire introduction and configurations for upgrading the dependency environment for Controller 5.15.20 on a Linux system; please configure it according to your needs.