Build a DevOps platform with Spring Boot and Docker Compose

As the software industry continues to develop, more and more companies are turning to the DevOps development model to achieve more efficient development, testing, and deployment. Building an efficient DevOps platform requires not only advanced technology, but also a high degree of automation and standardization.

This article will introduce how to use Spring Boot and Docker Compose to build a DevOps platform to improve development, testing and deployment efficiency.

1. Introduction to Spring Boot

Spring Boot is a rapid development framework based on the Spring framework. It provides the features of automated configuration, rapid development and rapid deployment. It is the first choice for modern web application development. One of the preferred frameworks.

Benefits of Spring Boot:

1. Automatic configuration: Spring Boot can automatically configure most applications, allowing developers to build applications faster.

2. Applications that can run independently: Spring Boot can run applications independently and does not need to be deployed to the server.

3. Rapid development: Spring Boot provides a series of rapid development tools, such as Spring tool suite and Spring CLI.

2. Introduction to Docker Compose

Docker Compose is a multi-container orchestration tool based on Docker containers. It can quickly create, start and manage multiple Docker containers.

Benefits of Docker Compose:

1. Quick start: Docker Compose can quickly start multiple Docker containers and set up networks and volumes for them.

2. Resource isolation: Docker Compose can set different resource limits for each container to ensure isolation between containers.

3. Multi-container orchestration: Docker Compose can start and manage multiple Docker containers at the same time to orchestrate different services or applications.

3. Build DevOps platform

1. Install Docker and Docker Compose

Before starting to build the DevOps platform, we need to install Docker and Docker Compose.

For the installation method of Docker, please refer to the official website: https://docs.docker.com/install/

For the installation method of Docker Compose, please refer to the official website: https://docs.docker .com/compose/install/

2. Create a Spring Boot application

Create a simple Spring Boot application to demonstrate how to use Docker Compose to build a DevOps platform.

1. Use Gradle or Maven to create an empty Spring Boot project.

2. Add the dependencies of Spring Boot and Tomcat in build.gradle or pom.xml.

3. Create a simple controller and page to display the "Hello World" message in the browser.

@RestController
public class MainController {

@RequestMapping("/")
String home() {
    return "Hello World!";
}

}

4. Use the gradle bootRun or mvn spring-boot:run command to start the application, and the browser accesses localhost :8080, you should see the "Hello World" message.

3. Create a Dockerfile

In order to deploy a Spring Boot application into Docker, we need to create a Dockerfile.

1. Create a file named Dockerfile in the root directory of the application.

2. Add the following content to the Dockerfile file:

Basic image

FROM openjdk:8-jdk-alpine

Set the working directory of the image

WORKDIR /app

Copy the application jar file to the image

COPY target/spring-boot-docker.jar /app/app.jar

Run the application

ENTRYPOINT ["java", "-jar", "/app/app.jar"]

3. Note: "spring-boot-docker.jar" here Should be based on your project name.

4. Create docker-compose.yml file

Using Docker Compose can easily create, manage and start multiple containers. We will create a docker-compose.yml file that will launch nginx, MySQL, and Spring Boot application containers.

1. Create a file named docker-compose.yml in the root directory of the application.

2. Add the following content to the docker-compose.yml file:

version: '3.0'

services:

nginx:

image: nginx:1.13.6
ports:
  - "80:80"
depends_on:
  - web
volumes:
  - ./nginx.conf:/etc/nginx/nginx.conf
  - ./nginx/logs:/var/log/nginx
networks:
  - webnet

mysql:

image: mysql:5.7
environment:
  MYSQL_ROOT_PASSWORD: example
  MYSQL_DATABASE: booking
  MYSQL_USER: booking
  MYSQL_PASSWORD: booking
volumes:
  - ./mysql/data:/var/lib/mysql
networks:
  - webnet

web:

build: .
ports:
  - "8080:8080"
depends_on:
  - mysql
networks:
  - webnet

networks:
webnet:

3. Note: The "nginx.conf" here should be based on your Depending on your needs, this includes the proxy server, port, and target server you want to use.

5. Start building the DevOps platform

Now, we are ready to build our DevOps platform.

1. Build the application image:

Use the docker build command to build the application image:

docker build -t spring-boot-docker .

Note: "spring-boot-docker" here should be based on your project name.

2. Start the application:

Start the application container using Docker Compose:

docker-compose up

This will start nginx, MySQL and Spring Boot the application containers and then connect them together. Access localhost through a browser and you should see the "Hello World" message.

3. Use DevOps tools:

Now that our DevOps platform has been built, we can start using various DevOps tools to manage our applications, such as GIT, Jenkins, Docker Registry, etc. .

4. Summary

This article introduces how to use Spring Boot and Docker Compose to build a complete DevOps platform. This platform can help developers build, test and deploy applications more conveniently, improving software development efficiency and quality. If you are looking for a modern, efficient and flexible DevOps solution, then Spring Boot and Docker Compose are undoubtedly the best choices.

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