当Docker遇到Intellij IDEA,再次解放了生产力

DEA是Java开发利器,Spring Boot是Java生态中最流行的微服务框架,Docker是时下最火的容器技术,那么它们结合在一起会产生什么化学反应呢?

开发前准备

1、Docker的安装可以参考: https://docs.docker.com/install/

2、配置Docker远程连接端口:

vi /usr/lib/systemd/system/docker.service

找到ExecStart,在最后面添加-H tcp://0.0.0.0:2375,如下图所示:


image.png

3、重启Docker

systemctl daemon-reload

systemctl start docker

4、开放端口

firewall-cmd --zone=public --add-port=2375/tcp --permanent  

5、IDEA安装插件,重启:

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6、连接远程Docker

  1. 编辑配置:
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  1. 填远程Docker地址:

    image
  2. 连接成功,会列出远程Docker容器和镜像:

    image

新建项目

创建Spring Boot项目

项目结构图:

image.png

配置pom文件:

<?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>docker-demo</groupId>

<artifactId>com.demo</artifactId>

<version>1.0-SNAPSHOT</version>

<parent>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-parent</artifactId>

    <version>2.0.2.RELEASE</version>

    <relativePath />

</parent>



<properties>

     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

     <docker.image.prefix>com.demo</docker.image.prefix>

     <java.version>1.8</java.version>

</properties>

<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>

          <dockerDirectory>src/main/docker</dockerDirectory>

          <resources>

            <resource>

                <targetPath>/</targetPath>

                <directory>${project.build.directory}</directory>

                <include>${project.build.finalName}.jar</include>

            </resource>

          </resources>

       </configuration>

    </plugin>

    <plugin>

        <artifactId>maven-antrun-plugin</artifactId>

        <executions>

             <execution>

                 <phase>package</phase>

                <configuration>

                    <tasks>

                        <copy todir="src/main/docker" file="target/${project.artifactId}-${project.version}.${project.packaging}"></copy>

                    </tasks>

                 </configuration>

                <goals>

                    <goal>run</goal>

                </goals>

                </execution>

        </executions>

    </plugin>



   </plugins>

</build>

<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>

<dependency>

    <groupId>log4j</groupId>

    <artifactId>log4j</artifactId>

    <version>1.2.17</version>

</dependency>

</dependencies>

</project>

在src/main目录下创建Docker目录,并创建Dockerfile文件

FROM openjdk:8-jdk-alpine

ADD *.jar app.jar

ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

ADD *.jar app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"] </pre>

在resource目录下创建application.properties文件

logging.config=classpath:logback.xml

logging.path=/home/developer/app/logs/

server.port=8990

创建DockerApplication文件

@SpringBootApplication

public class DockerApplication {

public static void main(String[] args) {

    SpringApplication.run(DockerApplication.class, args);

}

} 

创建DockerController文件

@RestController

public class DockerController {

static Log log = LogFactory.getLog(DockerController.class);



@RequestMapping("/")

public String index() {

    log.info("Hello Docker!");

    return "Hello Docker!";

}

} 

增加配置

image
image.png
image.png

命令解释:

  • Image tag:指定镜像名称和tag,镜像名称为docker-demo,tag为1.1
  • Bind ports:绑定宿主机端口到容器内部端口。格式为[宿主机端口]:[容器内部端口]
  • Bind mounts:将宿主机目录挂到到容器内部目录中。格式为[宿主机目录]:[容器内部目录]。这个Spring Boot项目会将日志打印在容器/home/developer/app/logs/目录下,将宿主机目录挂载到容器内部目录后,那么日志就会持久化容器外部的宿主机目录中。

Maven打包

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运行

image.png
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先pull基础镜像,然后再打包镜像,并将镜像部署到远程Docker运行。

image.png

这里我们可以看到镜像名称为docker-demo:1.1,Docker容器为docker-server。

运行成功

image.png

浏览器访问

image

日志查看

image.png

自此通过IDEA部署Spring Boot项目到Docker成功!难以想象,部署一个Javaweb项目竟然如此简单方便!

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