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Lab: Install Jenkins on an Ubuntu 24.04 EC2 Instance

Prerequisites

  • EC2 Instance: Ubuntu 24.04 installed.
  • Security Group: Ensure ports 8080 (Jenkins) and 22 (SSH) are open.
  • Root or sudo access.

Step 1: SSH into Your EC2 Instance

  1. Open your terminal and connect to your EC2 instance using SSH: 
    ssh -i <your-aws-key.pem> ubuntu@<ec2-instance-public-ip>

Step 2: Update the System

  1. Update the package lists: 
    sudo apt update
  2. Upgrade the system packages: 
    sudo apt upgrade -y

Step 3: Install Java

Jenkins requires Java to run. Install OpenJDK 17 (recommended version for Jenkins):

  1. Install OpenJDK: 
    sudo apt install openjdk-17-jdk -y
  2. Verify Java installation: 
    java -version

Step 4: Add Jenkins Repository

  1. Import the Jenkins GPG key: 
    wget -O /usr/share/keyrings/jenkins-keyring.asc \
https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key
  2. Add the Jenkins package repository to the system: 
    echo "deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc]" \
https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
/etc/apt/sources.list.d/jenkins.list > /dev/null

Step 5: Install Jenkins

  1. Update the package list to include Jenkins: 
    sudo apt update
  2. Install Jenkins: 
    sudo apt install jenkins -y

Step 6: Start and Enable Jenkins

  1. Start the Jenkins service: 
    sudo systemctl enable jenkins
  2. Enable Jenkins to start at boot: 
    sudo systemctl start jenkins

Step 7: Open Firewall for Jenkins

  1. Allow port 8080 for Jenkins if UFW (Uncomplicated Firewall) is enabled: 
    sudo ufw allow 8080
  2. Check the status of UFW: 
    sudo ufw status

Step 8: Access Jenkins Web Interface

  1. Open a browser and navigate to: 
    http://<ec2-instance-public-ip>:8080

Step 9: Unlock Jenkins

  1. Retrieve the initial admin password: 
    sudo cat /var/lib/jenkins/secrets/initialAdminPassword
  2. Copy the password and paste it into the Jenkins web interface to unlock Jenkins.

Step 10: Install Suggested Plugins

  1. Once logged in, select the Install suggested plugins option to install the recommended Jenkins plugins.

Step 11: Create the First Admin User

  1. After the plugins are installed, you will be prompted to create the first admin user. Fill in the required details and continue.

Step 12: Jenkins is Ready

  1. After completing the setup steps, Jenkins is ready to use.
  2. You can now access the Jenkins dashboard at: 
    http://<ec2-instance-public-ip>:8080