🚀 Deploying a React.js App Using Helm on Kubernetes: A Step-by-Step Guide with CI/CD 🚀

In today's fast-paced tech environment, continuous deployment and integration are critical for maintaining competitive advantage. One of the most efficient ways to manage your deployments is through Kubernetes and Helm. Today, I will share how I deployed a React.js app using Helm with CI/CD stages including SCM checkout, SonarQube analysis, Docker build, Docker push, and Kubernetes deployment. Let's dive in! 🌊

🎯 Objectives

• Checkout Code from Source Control Management (SCM)

• Analyze Code Quality with SonarQube

• Build Docker Image of the React.js app

• Push Docker Image to a Registry

• Deploy Application on Kubernetes using Helm

🛠️ Tools Used

• SCM: GitHub

• Code Quality: SonarQube

• Containerization: Docker

• Container Registry: Docker Hub

• Orchestration: Kubernetes (K8s)

• Package Manager: Helm

• CI/CD: Jenkins

📋 Prerequisites

• A running Kubernetes cluster

• Helm installed

• Jenkins for CI/CD pipeline

• SonarQube server

• Docker Hub account

📂 Step 1: SCM Checkout 🗂️

Start by checking out the code from your GitHub repository. This is typically the first step in your Jenkins pipeline.

stage('SCM Checkout') {
    steps {
        git 'https://github.com/your-username/your-repo.git'
    }
}

🔍 Step 2: SonarQube Analysis 🧹

Next, analyze the code quality using SonarQube. This ensures your code adheres to the required standards and is free of critical bugs.

stage('SonarQube Analysis') {
    steps {
        script {
            def scannerHome = tool 'SonarQubeScanner'
            withSonarQubeEnv('SonarQube') {
                sh "${scannerHome}/bin/sonar-scanner"
            }
        }
    }
}

🏗️ Step 3: Docker Build 🐳

Build the Docker image for the React.js app. This encapsulates your app and its dependencies into a portable container.

stage('Docker Build') {
    steps {
        script {
            docker.build("your-username/your-app:${env.BUILD_ID}")
        }
    }
}

🚀 Step 4: Docker Push 📤

Push the Docker image to Docker Hub. This makes your image available for deployment.

stage('Docker Push') {
    steps {
        script {
            docker.withRegistry('https://index.docker.io/v1/', 'docker-hub-credentials') {
                docker.image("your-username/your-app:${env.BUILD_ID}").push()
            }
        }
    }
}

📦 Step 5: Deploy on Kubernetes using Helm 🛳️

Finally, deploy your app on Kubernetes using Helm. Helm simplifies the deployment process by managing Kubernetes manifests as charts.

stage('Helm Deploy') {
    steps {
        script {
            sh "helm upgrade --install my-app ./helm-chart --set image.tag=${env.BUILD_ID}"
        }
    }
}

🌟 Conclusion

Deploying a React.js application on Kubernetes using Helm, while incorporating a robust CI/CD pipeline, ensures your application is always up-to-date, reliable, and scalable. Leveraging tools like Jenkins, SonarQube, Docker, and Helm allows for seamless automation and efficient management of your application lifecycle. 🚀

By following these steps, you can achieve continuous deployment and integration with minimal manual intervention, allowing your development team to focus on building amazing features and improving code quality. Happy coding! 🎉

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