INSTALL JENKINS

INSTALL JENKINS  (lab4)

In this hands-on lab, we will install Java and Jenkins. Once this is done and the Jenkins instance is up and running, take some time to look around the interface and ensure you are familiar with all the menu items and other parts of the interface.

To install Jenkins on Ubuntu via the command line, you can follow these steps:

Update Package Index 

Before installing any new packages, it's a good practice to update the local package index to ensure you have the latest version information. 

Run the following command:

To update your system's package list, use the following command:

sudo apt update

      Install Java

J  Jenkins requires Java to run. You can install Open JDK using the following command: 

sudo apt install default-jdk

Sometimes you can be asked after the operation a number of CPU utilization is going to be used. Do you want to continue (Y/N). Type y

Check Java version

java -version

Add the Jenkins repository key:

curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \   /usr/share/keyrings/jenkins-keyring.asc > /dev/null

Add the Jenkins repository to your sources list:

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

  Update your package index again:

sudo apt update

Install Jenkins:

sudo apt install jenkins -y

Start the Jenkins service:

sudo systemctl start jenkins

Enable Jenkins to start at boot

sudo systemctl enable jenkins

Check the status of Jenkins:

sudo systemctl status jenkins

ACCESSING JENKINS PORT

To expose port 8080 on an AWS instance, you need to configure the security group associated with the instance to allow inbound traffic on port 8080. Here's how you can do it:

Sign in to the AWS Management Console: Go to the AWS Management Console and sign in to your account.

Navigate to the EC2 Dashboard: From the services menu, navigate to the EC2 dashboard.

Select the Instance: Select the EC2 instance to which you want to expose port 8080.

View Security Groups: In the details pane at the bottom, find the Security groups section and click on the linked security group name.

Click on Security Group

Edit Inbound Rules: In the security group settings, click on the "Inbound rules" tab.

Add Rule: Click on the "Edit inbound rules" button.

Add Port 8080: Add a new rule to allow inbound traffic on port 8080. Choose Custom TCP from the dropdown list, and specify port range 8080.

Save Rules: Click on the "Save rules" button to apply the changes.

Now, port 8080 should be exposed on your AWS instance, and you should be able to access Jenkins running on that port from outside the instance

Go to EC2  instance and copy your public IP address and open a web address with port 8080

Jenkins Should be up and running

Now we need to go back to our Jenkins server terminal to access the password for our Jenkins Server

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

Copy the password to Jenkins and lets access the server

Copy the 32-character alphanumeric password from the terminal and paste it into the Administrator password field, then click Continue.

The next screen presents the option of installing suggested plugins or selecting specific plugins:

We’ll click the Install suggested plugins option, which will immediately begin the installation process.

When the installation is complete, you’ll be prompted to set up the first administrative user. Create your username and password.

You’ll receive an Instance Configuration page that will ask you to confirm the preferred URL for your Jenkins instance. SKIP

You’ll receive a confirmation page confirming that “Jenkins is Ready!”:

Click Start using Jenkins to visit the main Jenkins dashboard:

At this point, you have completed a successful installation of Jenkins.

Conclusion

In this tutorial, you installed Jenkins using the project-provided packages, started the server, opened the Jenkins Port, and created an administrative user. At this point, you can start exploring Jenkins.