SpringBoot集成Docker

Docker是一个开源的应用容器引擎，它允许开发者将应用及其依赖打包到一个可移植的容器中。

一、依赖

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-demoartifactId>
        <groupId>com.etgroupId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>

    <artifactId>dockerartifactId>

    <properties>
        <maven.compiler.source>8maven.compiler.source>
        <maven.compiler.target>8maven.compiler.target>
    properties>
    <dependencies>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-autoconfigureartifactId>
        dependency>


    dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
            
            <plugin>
                <groupId>com.spotifygroupId>
                <artifactId>docker-maven-pluginartifactId>
                <version>1.2.0version> 
                <configuration>
                    <imageName>springboot-demo/springboot-with-dockerimageName>
                    <dockerDirectory>src/main/dockerdockerDirectory>
                    <resources>
                        <resource>
                            <targetPath>/targetPath>
                            <directory>${project.build.directory}directory>
                            <include>${project.build.finalName}.jarinclude>
                        resource>
                    resources>
                configuration>
            plugin>
            
        plugins>
    build>
project>
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二、配置文件和启动类

server:
  port: 8088
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@SpringBootApplication
public class DemoApplication {

   public static void main(String[] args) {
      SpringApplication.run(DemoApplication.class, args);
   }
}
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三、Dockerfile

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD docker-1.0-SNAPSHOT.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
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四、Controller

@Controller
public class HelloWorldController {
    @RequestMapping("/hello")
    @ResponseBody
    public Map<String, Object> showHelloWorld(){
        Map<String, Object> map = new HashMap<>();
        map.put("msg", "HelloWorld");
        return map;
    }
}
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五、构建镜像

mvn clean package docker:build

docker images 查看镜像

六、运行容器

docker run -p 8088:8088 springboot-demo/springboot-with-docker

访问地址http://127.0.0.1:8088/hello，返回

{“msg”:“HelloWorld”}