Learning Jenkins on AWS EC2

I have followed the steps below to achieve a fully functional Jenkins setup on an AWS EC2 instance, including Docker configuration as an agent. This guide will help you set up your own CI/CD environment, ready for deploying applications to Kubernetes and more.

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Installation on EC2 Instance

Steps I Followed to Install Jenkins on AWS EC2

1. Launch an EC2 Instance on AWS:

   • I went to the AWS Console, navigated to Instances (running), and selected Launch instances to create a new EC2 instance.

2. Install Java:

   • Since Jenkins requires Java, I installed Java with the following commands:

       bashCopy codesudo apt update
       sudo apt install openjdk-11-jre
     

   • I verified the Java installation:

       bashCopy codejava -version
     

3. Install Jenkins:

   • Next, I added Jenkins to the package repository and installed it:

       bashCopy codecurl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee /usr/share/keyrings/jenkins-keyring.asc > /dev/null
       echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] https://pkg.jenkins.io/debian binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null
       sudo apt-get update
       sudo apt-get install jenkins
     

4. Open Port 8080 on EC2:

   • To allow external access, I configured the security group to open port 8080 (TCP). This allows Jenkins to be accessed from outside AWS.

5. Access Jenkins:

   • I accessed Jenkins using the EC2 instance’s public IP at http://<ec2-instance-public-ip>:8080.

6. Login to Jenkins:

   • I retrieved the initial admin password with:

       bashCopy codesudo cat /var/lib/jenkins/secrets/initialAdminPassword
     

   • Then, I logged in to Jenkins and selected Install suggested plugins.

7. Create an Admin User:

   • I created my first admin user, which is recommended for securing future use cases with this Jenkins instance.

8. Install Docker Pipeline Plugin:

   • To integrate Docker with Jenkins, I went to Manage Jenkins > Manage Plugins, searched for "Docker Pipeline" under the Available tab, installed the plugin, and restarted Jenkins.

9. Docker Configuration on EC2:

   • I installed Docker on the instance:

       bashCopy codesudo apt update
       sudo apt install docker.io
     

   • Then, I granted Docker permissions to the Jenkins and Ubuntu users:

       bashCopy codesudo usermod -aG docker jenkins
       sudo usermod -aG docker ubuntu
       systemctl restart docker
     

   • Finally, I restarted Jenkins to complete the Docker configuration: http://<ec2-instance-public-ip>:8080/restart

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Success!

Following these steps, I set up Jenkins with Docker as an agent on an EC2 instance. You’re now ready to start building and deploying applications with Jenkins on AWS!