Install the appropriate Java version (Jenkins requires Java 8 or 11)

[PESolut]

As part of our prerequisite steps to set up a CI/CD pipeline, we need to install the appropriate Java version for Jenkins on our EC2 instance.

Objective

Install the most suitable Java version to ensure optimal performance and compatibility with our Jenkins installation.

Steps:

1. Verify current Java installation:

   • [ ] Check if Java is already installed: java -version

2. Remove any outdated Java versions (if necessary):

   • [ ] Uninstall older Java versions if present

3. Install OpenJDK 17:

   • [ ] Update package index: sudo yum update
   • [ ] Install OpenJDK 17: sudo yum install java-17-amazon-corretto

4. Verify Java installation:

   • [ ] Check installed version: java -version
   • [ ] Ensure OpenJDK 17 is correctly installed

5. Set JAVA_HOME environment variable:

   • [ ] Locate Java installation directory
   • [ ] Add JAVA_HOME to /etc/environment

6. Apply changes:

   • [ ] Source the updated environment file or restart the shell

Verification:

• [ ] Confirm Java 17 is installed: java -version
• [ ] Verify JAVA_HOME is correctly set: echo $JAVA_HOME
• [ ] Ensure Java is accessible system-wide

Notes:

• OpenJDK 17 is recommended for compatibility with recent Jenkins versions
• Document the exact Java version installed for future reference
• Consider impact on any existing Java applications on the system
• Refer to Jenkins Java Support Policy for any future updates: https://www.jenkins.io/doc/book/platform-information/support-policy-java/

This installation ensures the appropriate Java version is set up on our EC2 instance, preparing it for Jenkins installation and integration with AWS services.