Spring Boot应用Docker化的步骤详解

<parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.0.0.RELEASE</version>
</parent>
<dependencies>
  <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-test</artifactId>
  <scope>test</scope>
 </dependency>
</dependencies>

@RestController
public class DockerDemoSpringApplication {
 public static void main(String[] args) {
  SpringApplication.run(DockerDemoSpringApplication.class, args);
 }

 @RequestMapping("/hello")
 public String hello(){
  return "Hello! Docker!”;
 }
}

FROM maven:3.3.3

ADD pom.xml /tmp/build/

RUN cd /tmp/build && mvn -q dependency:resolve

ADD src /tmp/build/src
  #构建应用

RUN cd /tmp/build && mvn -q -DskipTests=true package \
  #拷贝编译结果到指定目录
  && mv target/*.jar /app.jar \
  #清理编译痕迹
  && cd / && rm -rf /tmp/build

VOLUME /tmp
EXPOSE 8080
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar”]