Spring Boot provides multiple ways to containerize applications efficiently using Docker, Buildpacks, and Jib. This guide explores different approaches to building and deploying Spring Boot applications with Docker.
Spring Boot provides multiple ways to containerize applications efficiently using Docker, Buildpacks, and Jib. This guide explores different approaches to building and deploying Spring Boot applications with Docker.
In this section, we clarify Why Use Docker for Spring Boot? and summarize the key points you will apply in implementation.
Ensure you have the following:
To enable Docker support, add the Spring Boot Maven Plugin, Jib Plugin, and Spring Boot Web Starter to your build tool.
Maven:
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>com.google.cloud.tools</groupId> <artifactId>jib-maven-plugin</artifactId> <version>3.3.2</version> </plugin> </plugins> </build>
Gradle:
plugins { id 'org.springframework.boot' version '3.2.0' id 'com.google.cloud.tools.jib' version '3.3.2' } dependencies { implementation 'org.springframework.boot:spring-boot-starter-web' }
To enable Docker support, add the Spring Boot Maven Plugin and Jib Plugin to your build tool.
Maven:
<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>com.google.cloud.tools</groupId> <artifactId>jib-maven-plugin</artifactId> <version>3.3.2</version> </plugin> </plugins> </build>
Gradle:
plugins { id 'org.springframework.boot' version '3.2.0' id 'com.google.cloud.tools.jib' version '3.3.2' }
Define a REST endpoint to deploy inside a Docker container.
In this section, we clarify Step 3: Build and Run a Docker Image and summarize the key points you will apply in implementation.
Spring Boot provides built-in support for creating Docker images without a Dockerfile using Buildpacks.
mvn spring-boot:build-image
gradle bootBuildImage
Run the container:
docker run --rm -p 8080:8080 myproject:0.0.1-SNAPSHOT
Jib allows building optimized container images without a Docker daemon.
mvn jib:dockerBuild
gradle jibDockerBuild
Run the Jib-built container:
docker run --rm -p 8080:8080 myproject:0.0.1-SNAPSHOT
Once the container is running, test the REST API:
curl -X GET http://localhost:8080/hello
Expected Output:
Hello from Spring Boot running in Docker!
You now have a practical Spring Boot Docker Integration implementation with a clear, production-friendly Spring Boot structure. As a next step, adapt configuration and tests to your own domain, then validate behavior under realistic traffic and failure scenarios.
package com.example.docker; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication @RestController public class DockerApplication { public static void main(String[] args) { SpringApplication.run(DockerApplication.class, args); } @GetMapping("/hello") public String hello() { return "Hello from Spring Boot running in Docker!"; } }
package com.example.docker import org.springframework.boot.autoconfigure.SpringBootApplication import org.springframework.boot.runApplication import org.springframework.web.bind.annotation.GetMapping import org.springframework.web.bind.annotation.RestController @SpringBootApplication @RestController class DockerApplication { @GetMapping("/hello") fun hello(): String = "Hello from Spring Boot running in Docker!" } fun main(args: Array<String>) { runApplication<DockerApplication>(*args) }
