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：