Day 67 — Setting up Jenkins

Today, I installed Jenkins on an AWS EC2 instance running Ubuntu. Jenkins is one of the most widely used CI/CD automation tools, and setting it up on a cloud server is an essential step to enable automated builds and deployments.

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☁️ Prerequisites

Before installation, you should know the hardware requirements:

• Minimum hardware:

  • 256 MB RAM

  • 1 GB Disk space (10 GB if running via Docker)

• Recommended (small team):

  • 4 GB+ RAM

  • 50 GB+ Disk space

Also ensure your EC2 instance is Ubuntu-based.

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🔧 Installation Steps

1. Update system & install dependencies

sudo apt update
sudo apt install fontconfig openjdk-21-jre
java -version

✔️ This ensures Java is installed and Jenkins can run.

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2. Add Jenkins repo & GPG key

sudo wget -O /etc/apt/keyrings/jenkins-keyring.asc \
  https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key

echo "deb [signed-by=/etc/apt/keyrings/jenkins-keyring.asc]" \
  https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null

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3. Install Jenkins

sudo apt-get update
sudo apt-get install jenkins

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4. Start and Enable Jenkins Service

sudo systemctl enable jenkins
sudo systemctl start jenkins
sudo systemctl status jenkins

✔️ Jenkins is now running and accessible through your EC2’s public IP on port 8080.

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🎯 What I Learned

• How to provision an EC2 server for Jenkins

• How to install and configure Jenkins on Ubuntu

• How Jenkins runs as a service and can auto-start on boot

• Jenkins dashboard is accessible via <EC2-Public-IP>:8080

This setup will serve as the base for automating builds and deployments in upcoming steps. 🚀

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