How to deploy Spring Boot using Docker

<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 DockerController {
  
  @RequestMapping("/")
  public String index() {
    return "Hello Docker!";
  }
}

@SpringBootApplication
public class DockerApplication {

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

<properties>
  <docker.image.prefix>springboot</docker.image.prefix>
</properties>

<build>
  <plugins>
    <plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
    </plugin>
    <!-- Docker maven plugin -->
    <plugin>
      <groupId>com.spotify</groupId>
      <artifactId>docker-maven-plugin</artifactId>
      <version>1.0.0</version>
      <configuration>
        <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
        <dockerDirectory>src/main/docker</dockerDirectory>
        <resources>
          <resource>
            <targetPath>/</targetPath>
            <directory>${project.build.directory}</directory>
            <include>${project.build.finalName}.jar</include>
          </resource>
        </resources>
      </configuration>
    </plugin>
    <!-- Docker maven plugin -->
  </plugins>
</build>

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD spring-boot-docker-1.0.jar app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

yum install docker

service docker start
chkconfig docker on

#LCTT Annotation: The old sysv syntax is used here. For example, the new systemd syntax supported in CentOS 7 is as follows:
systemctl start docker.service
systemctl enable docker.service

vi /etc/docker/daemon.json

#After adding:
{
  "registry-mirrors": ["https://registry.docker-cn.com"],
  "live-restore": true
}

systemctl restart docker

yum -y install java-1.8.0-openjdk*

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64 
export PATH=$PATH:$JAVA_HOME/bin 

source /etc/profile

## Unzip tar vxf apache-maven-3.5.2-bin.tar.gz
## Move mv apache-maven-3.5.2 /usr/local/maven3

MAVEN_HOME=/usr/local/maven3
export MAVEN_HOME
export PATH=${PATH}:${MAVEN_HOME}/bin

#Packaging mvn package
#Start java -jar target/spring-boot-docker-1.0.jar

mvn package docker:build

...
Step 1: FROM openjdk:8-jdk-alpine
 ---> 224765a6bdbe
Step 2: VOLUME /tmp
 ---> Using cache
 ---> b4e86cc8654e
Step 3: ADD spring-boot-docker-1.0.jar app.jar
 ---> a20fe75963ab
Removing intermediate container 593ee5e1ea51
Step 4: ENTRYPOINT java -Djava.security.egd=file:/dev/./urandom -jar /app.jar
 ---> Running in 85d558a10cd4
 ---> 7102f08b5e95
Removing intermediate container 85d558a10cd4
Successfully built 7102f08b5e95
[INFO] Built springboot/spring-boot-docker
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 54.346 s
[INFO] Finished at: 2018-03-13T16:20:15+08:00
[INFO] Final Memory: 42M/182M
[INFO] ------------------------------------------------------------------------

docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
springboot/spring-boot-docker latest 99ce9468da74 6 seconds ago 117.5 MB

docker run -p 8080:8080 -t springboot/spring-boot-docker

docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
049570da86a9 springboot/spring-boot-docker "java -Djava.security" 30 seconds ago Up 27 seconds 0.0.0.0:8080->8080/tcp determined_mahavira

Hello Docker!