在Docker中部署Spring Boot项目过程详解

<?xml version="1.0" encoding="UTF-8"?>
<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">
  <modelVersion>4.0.0</modelVersion>

  <groupId>cn.itweknow</groupId>
  <artifactId>springboot-docker</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>springboot-docker</name>
  <description>Demo project for Spring Boot</description>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.0.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
  </properties>

  <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>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

@RestController
public class HelloController {

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

<plugin>
  <groupId>com.spotify</groupId>
  <artifactId>docker-maven-plugin</artifactId>
  <version>1.2.0</version>
  <configuration>
    <!-- 这里是最终生成的docker镜像名称 -->
    <imageName>itweknow/${project.artifactId}</imageName>
    <!-- 基础镜像，运行一个springboot应用只需要基础的java环境就行 -->
    <baseImage>java:8</baseImage>
    <!-- docker启动的时候执行的命令 -->
    <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
    <resources>
    <resource>
      <targetPath>/</targetPath>
      <directory>${project.build.directory}</directory>
      <include>${project.build.finalName}.jar</include>
      </resource>
    </resources>
  </configuration>
</plugin>

mvn clean
# -Dmaven.test.skip=true 是跳过测试代码
mvn package -Dmaven.test.skip=true
mvn docker:build

mvn clean package docker:build -Dmaven.test.skip=true

REPOSITORY                      TAG         IMAGE ID      CREATED       SIZE
itweknow/springboot-docker              latest       f03b689cfc33    10 seconds ago   660MB

# -d 是指定后台运行
# --name是指定容器名称
# -p 8080:8080 是指将容器的8080端口映射给宿主机的8080端口 格式为：主机(宿主)端口:容器端口
docker run -d --name test -p 8080:8080 itweknow/springboot-docker

CONTAINER ID    IMAGE            COMMAND         CREATED       STATUS       PORTS          NAMES
652fd3ccac89    itweknow/springboot-docker  "java -jar /springbo…"  3 seconds ago    Up 2 seconds    0.0.0.0:8080->8080/tcp  test