1. Setup AWS Ubuntu Server

1.1 Launching an AWS Instance

Firstly, click on the Launch instance button to start the process of launching a new instance. And name that instance link Jenkins.

Choose the Amazon Machine Image (AMI) that you want to use for your instance. This will typically be the operating system you want to use (Ubuntu).

Configure additional details such as the key pair settings and security group (Network) settings.

Review all settings and click the Launch button to create an instance. Once your instance is launched, it can be connect using a remote desktop or SSH client and start configuring software and applications.

1.2 Adding Jenkins Port to AWS Instance

Select the Jenkins instance that you want to add Jenkins port to. Click on the Security tab in the details pane at the bottom of the screen. Under Security details menu click on the Security group link.

Then under the Inbound rules tab Click on the Edit inbound rules button.

Inside Edit inbound rules section Click on the Add rule button to create a new inbound rule.

Select Custom TCP rule from the Type dropdown menu and enter 8080 as the Port range. Then Select Anywhere (or a specific IP range) as the Source to allow access from any IP address or a specific range of IP addresses. Finally, click on the Save rules button to apply the changes.

2. Installing Jenkins on AWS Ubuntu Server

2.1 Installing Jenkins

First, update the default Ubuntu packages lists for upgrades with the following command:

sudo apt update

Then, run the following command to install JDK:

sudo apt install default-jdk -y

Now, we will install Jenkins itself. Issue the following four commands in sequence to initiate the installation from the Jenkins repository:

curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io.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-stable binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null

sudo apt update

sudo apt install jenkins -y

2.2 Setting Up Jenkins

When the Jenkins has been installed on the Ubuntu, next step is to make the Jenkins enable using the systemctl command:

sudo systemctl enable jenkins

Once that’s done, start the Jenkins service with the following command:

sudo systemctl start jenkins

To confirm its status, use:

sudo systemctl status jenkins

2.3 Allowing Jenkins Port [8080]

With Jenkins installed, we can proceed with adjusting the firewall settings. By default, Jenkins will run on port 8080.

In order to ensure that this port is accessible, we will need to configure the built-in Ubuntu firewall (ufw). To open the 8080 port and enable the firewall, use the following commands:

sudo ufw allow 8080

Then we will enable the UFW(Ubuntu Firewall) service:

sudo ufw enable

Once done, test whether the firewall is active using this command:

sudo ufw status

With the firewall configured, it’s time to set up Jenkins itself. Type in the IP of your EC2 along with the port number. The Jenkins setup wizard will open.

2.4 Jenkins Credentials

To check the initial password, use the cat command as indicated below:

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

All Set! You can now start automating...

debrajhyper / Jenkins-Installation