HOWTO
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In the fast-paced world of software development, Continuous Integration (CI) and Continuous Delivery (CD) have become essential practices for ensuring the reliability and efficiency of code deployment. Jenkins, an open-source automation server, plays a crucial role in setting up robust CI/CD pipelines. In this guide, we’ll walk you through the process of setting up a CI/CD pipeline using Jenkins on Red Hat Enterprise Linux 9 (RHEL 9). Follow these step-by-step instructions to streamline your development and deployment workflows.
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Before diving into the installation and configuration, make sure you have the following prerequisites in place:
Begin by updating your system and installing Java Development Kit (JDK). Jenkins is built on Java, so this step is crucial.
$ sudo dnf update
$ sudo dnf install java-11-openjdk-devel
Now, download and install the Jenkins repository key and enable the Jenkins repository:
$ sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
$ sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
Install Jenkins:
$ sudo dnf install jenkins
Start and enable Jenkins service:
$ sudo systemctl start jenkins
$ sudo systemctl enable jenkins
Access Jenkins through your web browser by navigating to http://<your-server-IP>:8080. Retrieve the initial administrator password using:
$ sudo cat /var/lib/jenkins/secrets/initialAdminPassword
Follow the on-screen instructions to complete the Jenkins setup.
Once Jenkins is up and running, install the necessary plugins to support your CI/CD workflow. Common plugins include Git, GitHub, Docker, and Pipeline.
If you chose the Pipeline job type, you’ll need to define your CI/CD pipeline using the Jenkinsfile. Here’s a basic example:
pipeline {
agent any
stages {
stage('Checkout') {
steps {
checkout scm
}
}
stage('Build') {
steps {
// Your build commands
}
}
stage('Test') {
steps {
// Your testing commands
}
}
stage('Deploy') {
steps {
// Your deployment commands
}
}
}
}
Customize the stages based on your project’s requirements.
Save your Jenkins job configuration and trigger a manual build or wait for the defined triggers to start the CI/CD pipeline.
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