Deploy Spring Boot Application on Azure App Service Using Azure DevOps CI/CD

This guide provides a comprehensive, step-by-step process for deploying a Spring Boot application to Azure App Service using Azure DevOps for Continuous Integration (CI) and Continuous Deployment (CD). It covers essential steps, starting from creating an Azure App Service, setting up a Spring Boot project in Eclipse or IntelliJ, and pushing the code to Azure Repos, to configuring automated build and deployment pipelines in Azure DevOps. By the end of this guide, you'll have a fully automated deployment pipeline that allows for seamless code integration and deployment of your Spring Boot application to Azure, enhancing development efficiency and reliability.

Here is the general architecture diagram that we will be deploying.


1. Create Azure App Service

  • Sign in to Azure Portal: Log in to the Azure portal using your Azure account.
  • Create an App Service:
    1. Go to the Create a resource section.
    2. Search for App Service and click on it.
    3. Click Create to start the process.
  • Configure the App Service:
    • Subscription: Choose your Azure subscription.
    • Resource Group: Either select an existing resource group or create a new one.
    • Name: Give your App Service a unique name.
    • Publish: Select Code as the publish option.
    • Runtime Stack: Select Java (ensure you select the correct version of Java for your Spring Boot app).
    • Region: Select a region for hosting your app.
    • App Service Plan: Choose an existing plan or create a new one (e.g., Basic or Free for testing).
  • Review and Create: After confirming the settings, click Create. Once provisioned, you'll receive a URL for your App Service (e.g., https://your-app-service-name.azurewebsites.net).

2. Create a Spring Boot Application

  • Create Project in IDE:
    1. Use Spring Initializr (https://start.spring.io/) or your IDE (e.g., IntelliJ IDEA or Eclipse) to create a Spring Boot project.
    2. Add necessary dependencies such as Spring Web, Spring Boot DevTools, Spring Data JPA, etc.
  • Build and Test Locally: Build your Spring Boot application locally using mvn spring-boot:run or by running the application directly from your IDE to ensure it works as expected.

3. Push the Spring Boot Project to Azure Repos

  • Set Up Azure Repos:
    1. Go to Azure DevOps and create a new project (if not already created).
    2. Create a new Git repository in the Repos section.
  • Commit Code to Repository:
    1. In your IDE (e.g., IntelliJ or Eclipse), initialize a Git repository for the project if it hasn't been done already.
    2. Push the local code to the Azure Repos repository:
      git add .
git commit -m "Initial commit"
git remote add origin https://dev.azure.com/{organization}/{project}/_git/{repository-name}
git push -u origin master

4. Set Up Continuous Integration (CI) Pipeline in Azure DevOps

  • Create CI Pipeline:

    1. Go to Pipelines in Azure DevOps and click Create Pipeline.
    2. Choose Azure Repos Git as the source repository.

  • Select Pipeline Template:

    1. Select the Maven template (for Java Spring Boot) from the list of available templates.

  • Modify the YAML File: The generated YAML pipeline file will need adjustments based on your project setup. Here's an example for a Spring Boot Maven build:

    trigger:
  branches:
    include:
      - main  # or master, depending on your branch

pool:
  vmImage: 'ubuntu-latest'

steps:
- task: UseJavaTool@0
  inputs:
    versionSpec: '11'  # Specify the Java version

- task: Maven@3
  inputs:
    mavenPomFile: 'pom.xml'
    goals: 'clean install'

- task: PublishBuildArtifacts@1
  inputs:
    pathToPublish: $(Build.ArtifactStagingDirectory)
    artifactName: drop

  • Save and Run: After configuring, click Save and Run to trigger the CI pipeline, which will build your Spring Boot application.

5. Set Up Continuous Deployment (CD) Pipeline

  • Create Release Pipeline:
    1. In Azure DevOps, go to Pipelines > Releases and create a new release pipeline.
    2. Select the build artifact from the previous CI pipeline as the source.
  • Add a Stage for Deployment:
    1. Add a new stage (e.g., Production or Staging) and configure it.
  • Configure App Service Deployment:
    1. In the newly added stage, add an Azure App Service Deployment task.
    2. Configure the task:
      • Azure Subscription: Select your Azure subscription (you may need to authenticate).
      • App Service Name: Enter the name of the App Service you created earlier.
      • Package or Folder: Point it to the build artifact, usually under $(System.ArtifactsDirectory)/drop/**/*.jar for a Spring Boot .jar file.
  • Enable Continuous Deployment Trigger:
    1. Set the trigger to deploy automatically when a new build artifact is available.
    2. Enable the Continuous Deployment Trigger from the triggers tab.
  • Save and Deploy: Save your release pipeline, and it will deploy the Spring Boot app automatically when the build pipeline completes successfully.

6. Test the Deployment

  • Once the release pipeline completes, navigate to your App Service URL (e.g., https://your-app-service-name.azurewebsites.net).
  • Verify that your Spring Boot application is successfully deployed and running.

Summary:

By following these steps, you:

  • Created an Azure App Service to host your Spring Boot application.
  • Developed and tested a Spring Boot application locally.
  • Pushed the project to Azure Repos.
  • Set up CI and CD pipelines using Azure DevOps to automate building and deploying your Spring Boot application to Azure App Service.

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