Springboot（十二）构建docker images镜像

前言：

   把springboot工程，放在docker容器中运行，有很多种方法，本博客用maven插件与Dockerfile构建。

代码：

    首先构架一个springboot工程

pom.xml如下：docker-maven-plugin为构建docker所需的maven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">
<modelVersion>4.0.0</modelVersion>

<groupId>com.xhx.springboot</groupId>
<artifactId>springboot19</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>springboot19</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.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>
<docker.image.prefix>xuhaixing</docker.image.prefix>
</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>
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>1.0.0</version>
<configuration>
<imageName>${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>
<dockerHost>http://192.168.94.151:2375</dockerHost>
<dockerDirectory>src/main/docker</dockerDirectory>
<resources>
<resource>
<targetPath>/</targetPath>
<directory>${project.build.directory}</directory>
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>


</project>

imageName:为生成的镜像名字，:后面为tag

dockerHost:为docker主机地址，docker需要开启tcp访问

dockerDirectory：为Dockerfile的路径地址

resource中把最终工程的jar包包含进来

Dockerfile如下：

FROM docker.io/java
VOLUME /tmp
ADD springboot19-0.0.1-SNAPSHOT.jar app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

Controller方法：

package com.xhx.springboot.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
* xuhaixing
* 2018/5/20 22:47
*/
@RestController
@RequestMapping(value = "test")
public class HelloController {

@RequestMapping(value = "hello")
public String helloWorld(){
return "hello world";
}
}

启动类：

package com.xhx.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

//mvn package docker:build -e
@SpringBootApplication
public class Springboot19Application {

public static void main(String[] args) {
SpringApplication.run(Springboot19Application.class, args);
}
}

spring的配置文件是空的，我什么都没配置。

构成的结构如下：

执行mvn package docker:build就行了

控制台会打印出下面信息：

docker容器中镜像：

启动：

查看日志：

访问

证明成功了。

​​我的github地址​​