一、docker介绍

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。这个容器可以在任何流行的 Linux或 Windows操作系统上运行，并且支持虚拟化。容器是完全基于沙箱机制的，这意味着它们之间不会有任何接口，从而确保了隔离性和安全性。

二、代码工程

pom.xml添加docker打包插件

<?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">    <parent>        <artifactId>springboot-demo</artifactId>        <groupId>com.et</groupId>        <version>1.0-SNAPSHOT</version>    </parent>    <modelVersion>4.0.0</modelVersion>
    <artifactId>docker</artifactId>
    <properties>        <maven.compiler.source>8</maven.compiler.source>        <maven.compiler.target>8</maven.compiler.target>    </properties>    <dependencies>
        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>
        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-autoconfigure</artifactId>        </dependency>

    </dependencies>    <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>1.2.0</version> <!-- 使用最新版本 -->                <configuration>                    <imageName>springboot-demo/springboot-with-docker</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>            <!-- End of Docker Maven Plugin -->        </plugins>    </build></project>

配置Dockerfile

FROM openjdk:8-jdk-alpineVOLUME /tmpADD docker-1.0-SNAPSHOT.jar app.jarEXPOSE 8080ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

启动类

package com.et.docker;
import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplicationpublic class DemoApplication {
   public static void main(String[] args) {      SpringApplication.run(DemoApplication.class, args);   }}

配置文件

server:  port: 8088

controller

package com.et.docker.controller;
import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;
import java.util.HashMap;import java.util.Map;
@Controllerpublic class HelloWorldController {    @RequestMapping("/hello")    @ResponseBody    public Map<String, Object> showHelloWorld(){        Map<String, Object> map = new HashMap<>();        map.put("msg", "HelloWorld");        return map;    }}

构建镜像

mvn clean package docker:build

查看镜像

docker images

三、测试

运行镜像服务

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"}

四、引用

•  https://www.cnblogs.com/JanYork/p/17041411.html

•  http://www.liuhaihua.cn/archives/710227.html