Installing Jenkins on Linux for the DevOps Code ClearCase®-Jenkins integration

Learn how to install Jenkins on Linux so that it can be integrated with DevOps Code ClearCase®.

Before you begin

Install the following items before you install Jenkins on Linux:
  1. You must have a 64-bit Java Runtime Environment (JRE) specifically for Java 11 installed before you install Jenkins. If you do not have a JRE already, you can obtain one from Adoptium at https://adoptium.net/temurin/releases/?version=11. After you have installed Java:
    • Set the path for the Java:
      setenv PATH /opt/your-java/bin:${PATH}
    • Set the Java path as a system environment variable:
      setenv JAVA_HOME /opt/your-java/bin
  2. You must install the ClearCase® Remote Client or DevOps Code ClearCase® before you install Jenkins and ensure that the system path includes /opt/devops/code/clearcase/bin.

Procedure

Use the following procedure to install Jenkins on Linux for the DevOps Code ClearCase®-Jenkins integration:
  1. Download the jenkins.war file from https://get.jenkins.io/war-stable/ and place it in the home directory.
    Note: ClearCase® supports Jenkins LTS 2.361.4 and later.
    Execute the following commands:
    1. mkdir JENKINS
    2. chmod 777 JENKINS
    3. cd JENKINS
    4. cp ~user/jenkins-2.361.4.war.
    5. ls to display the jenkins-2.361.4.war file
  2. Run the following command: 
    java -jar jenkins.war --httpPort=8080
    Notes:
    • If you want to use SSL/TLS for your Jenkins server, consult the Jenkins documentation at https://www.jenkins.io/doc/book/installing/initial-settings to use other command line flags instead of the preceding mentioned command line flag.
    • During the installation of Jenkins, logs and the initial password for Jenkins are created, as shown in the following example:
      Jenkins initial setup is required. An admin user has been created and a password generated.
Example: Please use the following password to proceed to installation:
aabbccdd
    Tip: Note the password because you need it to unlock Jenkins.
  3. With Jenkins hosted on part 8080, open a web browser and go to http://hostname:8080 to be navigated to where you can unlock Jenkins. See Unlocking Jenkins on Linux.

What to do next

You must unlock Jenkins on Linux and customize it before you can start using it.