Jenkin Installation on RHEL7

Note: Before installation make sure create yum repository then go to installation part.

To install Jenkins on Red Hat Enterprise Linux 7 (RHEL 7), you can follow these steps. Jenkins is a widely used automation server for building, testing, and deploying code. Before you begin, make sure you have administrative access to your RHEL 7 server.

Here's how you can install Jenkins on RHEL 7:

1. Update Your System:

It's a good practice to update your system's package repository to ensure you have the latest software packages:

sudo yum update

2. Install Java:

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

sudo yum install java-1.8.0-openjdk

Verify that Java has been installed correctly by running:

java -version

3. Add Jenkins Repository:

Jenkins provides an official repository for RHEL. You can add it to your system using the following commands:

sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins.io/redhat-stable/jenkins.repo

sudo rpm --import http://pkg.jenkins.io/redhat-stable/jenkins.io.key

4. Install Jenkins:

Now that you've added the Jenkins repository, you can install Jenkins with the following command:

sudo yum install jenkins

5. Start and Enable Jenkins:

Once Jenkins is installed, you can start the Jenkins service and enable it to start on boot:

# systemctl start jenkins

# systemctl enable jenkins

6. Check Jenkins Status:

You can verify that Jenkins is running by checking its status:

# systemctl status jenkins

If Jenkins is running correctly, you should see a status message indicating that it's active and running.

7. Firewall Configuration:

If you have a firewall enabled on your RHEL 7 system, you need to open port 8080 to access the Jenkins web interface. You can do this with the following command:

# firewall-cmd --zone=public --permanent --add-port=8080/tcp

# firewall-cmd --reload

8. Access Jenkins Web Interface:

Open a web browser and access Jenkins by navigating to http://your-server-IP-or-domain:8080. You should see the Jenkins setup wizard.

To get the initial admin password required for setup, you can run:

# cat /var/lib/jenkins/secrets/initialAdminPassword

Copy and paste the generated password into the Jenkins setup wizard to complete the installation.

9. Install Plugins and Configure Jenkins:

Follow the Jenkins setup wizard to install the recommended plugins and configure your Jenkins instance according to your needs.

10. Start Using Jenkins:

Once the setup is complete, you can start using Jenkins for your automation and CI/CD needs.

That's it! You now have Jenkins installed and running on your RHEL 7 server. You can customize Jenkins further and install additional plugins as needed for your projects.

Useful links:

https://www.jenkins.io/doc/book/installing/linux/

https://sysadminxpert.com/how-to-install-jenkins-on-centos-7-or-rhel-7/