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Spring Boot 4 Microservices & REST APIs · レッスン

マイクロサービス向けCI/CDパイプライン

マイクロサービスを自動的にデリバリーする継続的インテグレーション／継続的デリバリー（CI/CD）パイプラインを設計・実装します。

「マイクロサービス向けCI/CDパイプライン」はCoddyKit上の無料Spring Boot 4 Microservices & REST APIsレッスンです。 これはレッスン3/3です。 下記で完全なレッスンを無料で読むことができます。その後、ブラウザ内の組み込みコードエディタと24時間対応のAIチューターでハンズオン演習できます。 これはSpring Boot 4 Microservices & REST APIs学習パスの一部であり、ウェブとCoddyKitアプリ全体で進捗が同期されます。 Spring Boot 4 Microservices & REST APIsコースには全3レッスンが含まれています。

このレッスンの一部はまだ翻訳されておらず、英語で表示されています。

What is CI/CD?

Welcome to designing CI/CD pipelines! CI/CD stands for Continuous Integration and Continuous Delivery/Deployment.

  • It's a set of practices that automate the stages of software development.
  • From code changes to deployment, CI/CD aims to deliver updates faster and more reliably.
  • For microservices, CI/CD is crucial for managing many independent services efficiently.

Continuous Integration (CI)

Continuous Integration (CI) is the practice of frequently merging code changes into a central repository.

  • Each merge triggers an automated build and test process.
  • The goal is to detect integration issues early and provide rapid feedback to developers.
  • This prevents 'integration hell' and keeps the codebase in a consistently working state.

CI: The Build Stage

The first step in a CI pipeline is the build stage. This is where your source code is compiled into an executable artifact.

For Java applications, this means compiling .java files into .class files and packaging them, often into a JAR or WAR file. A build server executes commands like mvn clean install or gradle build.

Try running this simple Java program that simulates a successful build:

public class MyMicroserviceApp {
  public static void main(String[] args) {
    System.out.println("Microservice application built successfully!");
  }

  // A simple method that would be compiled
  public String getVersion() {
    return "1.0.0";
  }
}

CI: Automated Testing

After a successful build, the CI pipeline runs automated tests. This typically includes unit tests, integration tests, and sometimes static code analysis.

  • Unit tests verify individual components in isolation.
  • Integration tests check how different parts of your service, or even external services, work together.
  • Running tests automatically ensures new changes don't break existing functionality.

Here's a simple example simulating a test execution:

public class UserServiceTest {
  public static void main(String[] args) {
    if (testUserCreation()) {
      System.out.println("User service tests passed!");
    } else {
      System.out.println("User service tests failed!");
    }
  }

  public static boolean testUserCreation() {
    String user = "Alice";
    // Simulate user creation logic
    boolean success = user.equals("Alice"); // Placeholder for actual logic
    System.out.println("Testing user creation for 'Alice': " + (success ? "PASS" : "FAIL"));
    return success;
  }
}

Continuous Delivery (CD)

Continuous Delivery (CD) extends CI by ensuring that software can be released to production at any time.

  • After CI, the artifact (e.g., JAR file) is deployed to a staging or testing environment.
  • This environment is a replica of production, allowing for further automated or manual testing.
  • Deployment to production is typically a manual step, giving teams control over release timing.

Continuous Deployment (CD)

Continuous Deployment (CD) takes Continuous Delivery a step further. Every change that passes all automated tests is automatically deployed to production.

  • No human intervention is needed for the deployment itself.
  • This requires a very high level of automation and confidence in your testing suite.
  • It leads to extremely rapid release cycles and immediate feedback from real users.

Typical Pipeline Stages

A common CI/CD pipeline for microservices typically involves these stages:

  • Source: Code committed to version control (e.g., Git).
  • Build: Compile code, create artifacts (e.g., JAR/Docker image).
  • Test: Run unit, integration, and end-to-end tests.
  • Deploy: Deploy to staging/production environments (e.g., Kubernetes).
  • Monitor: Observe application health and performance post-deployment.

CI/CD for Microservices

Why is CI/CD particularly powerful for microservices?

  • Independent Deployments: Each microservice can have its own pipeline, allowing independent releases.
  • Faster Iteration: Small changes in one service can be deployed quickly without affecting others.
  • Isolation: Issues in one service's pipeline don't block others.
  • Scalability: CI/CD tools can manage hundreds or thousands of pipelines for various services.

Pipeline Concepts Check

Which of the following statements about CI/CD is TRUE?

Recap: Mastering the Flow

Great job! You've learned the fundamentals of CI/CD pipelines:

  • CI automates building and testing code changes.
  • CD (Delivery) ensures code is always ready for release, often with a manual production deployment.
  • CD (Deployment) fully automates deployment to production.
  • CI/CD is essential for microservices to enable independent, rapid, and reliable deployments.

Next, you're ready to explore how these pipelines integrate with cloud environments!

よくある質問

「マイクロサービス向けCI/CDパイプライン」レッスンは無料ですか？

はい。「マイクロサービス向けCI/CDパイプライン」の完全なテキストはこのウェブで無料で読めます。インタラクティブに演習し（組み込みコードエディタと24時間対応のAIチューター）、Spring Boot 4 Microservices & REST APIsコースの残りをアンロックするには、CoddyKit PROにアップグレードしてください。 Spring Boot 4 Microservices & REST APIsコースには全3レッスンが含まれています。

「マイクロサービス向けCI/CDパイプライン」で何を学びますか？

マイクロサービスを自動的にデリバリーする継続的インテグレーション／継続的デリバリー（CI/CD）パイプラインを設計・実装します。 ブラウザで直接実行するハンズオンコードでSpring Boot 4 Microservices & REST APIsを演習し、24時間対応のAIチューターがレッスンを進める中での質問に答えます。

Spring Boot 4 Microservices & REST APIsを始めるのに経験は必要ですか？

事前経験は必要ありません。CoddyKitのSpring Boot 4 Microservices & REST APIsは初級者から上級者向けに構成されているため、ここから始めるか最初から始めて、自分のペースで進むことができます。 これはレッスン3/3です。

「マイクロサービス向けCI/CDパイプライン」レッスンにはどのくらい時間がかかりますか？

ほとんどのCoddyKitレッスンは約5～10分かかります。各レッスンはコンパクトでインタラクティブなので、着実に進歩し、ウェブとアプリ全体で正確に前回の場所から再開できます。

このSpring Boot 4 Microservices & REST APIsレッスンでコードを書いて実行できますか？

はい。すべてのSpring Boot 4 Microservices & REST APIsレッスンに組み込みコードエディタが含まれているため、ブラウザでリアルコードを書いて実行し、即座のAIフィードバックを取得できます。ローカル設定は不要です。

このコースのすべてのレッスン

  1. Kubernetesクラスターへのデプロイ
  2. Spring Cloudによるサーバーレス関数
  3. マイクロサービス向けCI/CDパイプライン
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