在这篇文章中:



IntelliJ IDEA的Docker插件能帮助我们将当前工程制作成Docker镜像、运行在指定的远程机器上,是学习和开发阶段的好帮手,本文一起来实战此插件的基本用法;

全文概览

本文由以下几部分组成:

  1. 环境信息
  2. 介绍如何免费使用正版IntelliJ IDEA
  3. 介绍如何开启Docker的远程连接
  4. 安装Docker插件的步骤
  5. 连接远程Docker服务
  6. 创建springboot工程用于演示Docker插件
  7. 使用Docker插件将应用构建成镜像并在远程Docker上运行

环境信息

本次实战需要提前准备好以下内容:

  1. 开发环境操作系统:win10
  2. IntelliJ IDEA: 2018.2.4 (Ultimate Edition)
  3. JDK:1.8.0_181
  4. Maven:3.5.0
  5. Docker服务所在环境:CentOS Linux release 7.6.1810
  6. Docker:1.13.1, build b2f74b2/1.13.1

免费使用正版IntelliJ IDEA

IntelliJ IDEA (Ultimate Edition)是商业版本,目前其License费用为499美金一年,对于学习和非商业用途开发者来说,其实是有机会免费获取此License的,申请和使用的详情可参考《免费申请和使用IntelliJ IDEA商业版License指南》;

开启Docker的远程连接

本次实战中,IDEA作为开发电脑,要远程连接到另一台Linux电脑上部署的Docker服务,这就要求Docker服务开启了远程连接,开启方式请参考:《Docker远程连接设置》

准备工作完成了,开始实战吧。

安装Docker插件

  1. 在IDEA的开始页面,点击右下角的"Configure"菜单,再点击下图红框中的"Plugins"按钮,进入插件管理页面:



idea推送docker镜像没有日志显示 idea docker_spring

  1. 点击下图红框中的Browse repositories按钮:


idea推送docker镜像没有日志显示 idea docker_spring_02

  1. 如下图,红框1位置输入"Docker"之后就会搜到红框2中的Docker插件,再点击红框3中的"Install"按钮开始安装插件:


idea推送docker镜像没有日志显示 idea docker_spring_03

  1. 安装完成后,原先的"Install"按钮的文案变成了重启,点击该按钮重启IDEA,至此Docker插件安装完成;

连接远程Docker服务

  1. 在IDEA的开始页面,点击右下角的"Configure"菜单,再点击下图红框中的"Settings"按钮,进入设置页面:


idea推送docker镜像没有日志显示 idea docker_docker_04

  1. 在设置页面,按照下图的数字顺序创建一个Docker server并进行设置,其中"192.168.121.131"是Docker服务所在机器的IP地址,如果连接成功页面上会立即提示"Connection successful":


idea推送docker镜像没有日志显示 idea docker_idea docker_05

至此,Docker插件准备完毕,远程连接也已经OK,可以尝试使用该插件了。

创建一个springboot应用

为了验证Docker插件的功能,先开发一个简单的sringboot应用:

  1. 在IEDA上创建一个名为dockerplugindemo的springboot工程,其pom.xml是默认内容:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.bolingcavalry</groupId>
    <artifactId>dockerplugindemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>dockerplugindemo</name>
    <description>Demo project for Spring Boot</description>

<span ><</span>properties<span >></span>
    <span ><</span>java<span >.</span>version<span >></span><span >1.8</span><span ><</span><span >/</span>java<span >.</span>version<span >></span>
<span ><</span><span >/</span>properties<span >></span>

<span ><</span>dependencies<span >></span>
    <span ><</span>dependency<span >></span>
        <span ><</span>groupId<span >></span>org<span >.</span>springframework<span >.</span>boot<span ><</span><span >/</span>groupId<span >></span>
        <span ><</span>artifactId<span >></span>spring<span >-</span>boot<span >-</span>starter<span >-</span>web<span ><</span><span >/</span>artifactId<span >></span>
    <span ><</span><span >/</span>dependency<span >></span>

    <span ><</span>dependency<span >></span>
        <span ><</span>groupId<span >></span>org<span >.</span>springframework<span >.</span>boot<span ><</span><span >/</span>groupId<span >></span>
        <span ><</span>artifactId<span >></span>spring<span >-</span>boot<span >-</span>starter<span >-</span>test<span ><</span><span >/</span>artifactId<span >></span>
        <span ><</span>scope<span >></span>test<span ><</span><span >/</span>scope<span >></span>
    <span ><</span><span >/</span>dependency<span >></span>
<span ><</span><span >/</span>dependencies<span >></span>

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

<span ><</span>properties<span >></span>
    <span ><</span>java<span >.</span>version<span >></span><span >1.8</span><span ><</span><span >/</span>java<span >.</span>version<span >></span>
<span ><</span><span >/</span>properties<span >></span>

<span ><</span>dependencies<span >></span>
    <span ><</span>dependency<span >></span>
        <span ><</span>groupId<span >></span>org<span >.</span>springframework<span >.</span>boot<span ><</span><span >/</span>groupId<span >></span>
        <span ><</span>artifactId<span >></span>spring<span >-</span>boot<span >-</span>starter<span >-</span>web<span ><</span><span >/</span>artifactId<span >></span>
    <span ><</span><span >/</span>dependency<span >></span>

    <span ><</span>dependency<span >></span>
        <span ><</span>groupId<span >></span>org<span >.</span>springframework<span >.</span>boot<span ><</span><span >/</span>groupId<span >></span>
        <span ><</span>artifactId<span >></span>spring<span >-</span>boot<span >-</span>starter<span >-</span>test<span ><</span><span >/</span>artifactId<span >></span>
        <span ><</span>scope<span >></span>test<span ><</span><span >/</span>scope<span >></span>
    <span ><</span><span >/</span>dependency<span >></span>
<span ><</span><span >/</span>dependencies<span >></span>

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

</project>

  1. 应用启动类同时作为Controller,增加一个web响应接口:
package com.bolingcavalry.dockerplugindemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.text.SimpleDateFormat;
import java.util.Date;@SpringBootApplication
 @RestController
public class DockerplugindemoApplication {<span >public</span> <span >static</span> <span >void</span> <span class="token function">main</span><span >(</span>String<span >[</span><span >]</span> args<span >)</span> <span >{</span>
    SpringApplication<span >.</span><span class="token function">run</span><span >(</span>DockerplugindemoApplication<span >.</span><span >class</span><span >,</span> args<span >)</span><span >;</span>
<span >}</span>

@<span class="token function">RequestMapping</span><span >(</span><span >"/test"</span><span >)</span>
<span >public</span> String <span class="token function">test</span><span >(</span><span >)</span><span >{</span>
    <span >return</span> <span >"1. Hello world ! "</span> <span >+</span> <span >new</span> <span >SimpleDateFormat</span><span >(</span><span >" [yyyy-mm-dd  HH:mm:ss]"</span><span >)</span><span >.</span><span class="token function">format</span><span >(</span><span >new</span> <span >Date</span><span >(</span><span >)</span><span >)</span><span >;</span>
<span >}</span>}

可见这是个最普通的springboot应用,对外提供一个http接口,接下来用Docker插件将此应用构建成镜像并在远程Docker上运行;

用Docker插件将应用构建成镜像并在远程Docker上运行

  1. 在工程dockerplugindemo的pom.xml文件所在目录下,创建名为Dockerfile的文件,内容如下:
# Docker image for springboot application

VERSION 0.0.1

Author:

基础镜像,使用alpine操作系统,openjkd使用8u201

FROM openjdk:8u201-jdk-alpine3.9
#作者
 MAINTAINER BolingCavalry <zq2599@gmail.com>#系统编码
 ENV LANG=C.UTF-8 LC_ALL=C.UTF-8#声明一个挂载点,容器内此路径会对应宿主机的某个文件夹
 VOLUME /tmp#应用构建成功后的jar文件被复制到镜像内,名字也改成了app.jar
 ADD target/dockerplugindemo-0.0.1-SNAPSHOT.jar app.jar#启动容器时的进程
 ENTRYPOINT [“java”,"-jar","/app.jar"]#暴露8080端口
 EXPOSE 8080
  1. 如下图红框所示,创建一个配置:



idea推送docker镜像没有日志显示 idea docker_spring_06

  1. 创建一个Dockerfile配置,如下所示:


idea推送docker镜像没有日志显示 idea docker_idea docker_07

  1. Dockerfile配置详情如下图所示,请按照图中的说明进行设置,确保每个红框中都会执行到:


idea推送docker镜像没有日志显示 idea docker_idea docker_08

  1. 上图中最下面的那个"Run Maven Goal"点击后,会弹出一个小窗口 ,用来输入要执行的maven命令,这里输入clean package -U -DskipTests,表示每次在构建镜像之前,都会将当前工程清理掉并且重新编译构建:


idea推送docker镜像没有日志显示 idea docker_Docker_09

  1. 设置完成后,点击下图红框中的绿色三角按钮,执行此配置:


idea推送docker镜像没有日志显示 idea docker_idea docker_10

  1. 运行结果如下所示,项目构建成功后,在Docker上部署镜像成功,然后运行容器成功:


idea推送docker镜像没有日志显示 idea docker_Docker_11

  1. 登录远程Docker,先后执行docker image和docker ps命令查看镜像和容器情况如下,可见一切正常:
[root@maven ~]# docker images
REPOSITORY                                  TAG                   IMAGE ID            CREATED             SIZE
dockerplugindemo                            latest                0144ba203220        8 minutes ago       122 MB
docker.io/tomcat                            latest                96c4e536d0eb        2 days ago          506 MB
bolingcavalry/nacosconfigdemo               1.0-SNAPSHOT          ed524b78f80b        6 days ago          125 MB
bolingcavalry/nacosserver                   0.0.1                 9ab34ff860d8        3 weeks ago         156 MB
docker.io/openjdk                           8u212-jdk-stretch     03b20c1fa768        6 weeks ago         488 MB
docker.io/openjdk                           8u201-jdk-alpine3.9   3675b9f543c5        4 months ago        105 MB
docker.io/fabric8/java-jboss-openjdk8-jdk   1.3                   c9d7e2e7b917        20 months ago       436 MB
[root@maven ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                     NAMES
b54144064138        0144ba203220        "java -jar /app.jar"   8 minutes ago       Up 8 minutes        0.0.0.0:18080->8080/tcp   dockerplugindemo
  1. 远程Docker所在服务器IP地址是192.168.121.131,因此在浏览器上访问地址:http://192.168.121.131:18080/test ,得到响应如下图所示,可见应用在容器中正常运行:


idea推送docker镜像没有日志显示 idea docker_idea docker_12

  1. 修改工程中的DockerplugindemoApplication.java的源码,test方法的返回值原本是"Hello world ! ",改成"123456 Hello world ! ",然后再次点击绿色三角按钮,运行"dockerfile"配置,看看这个改动能不能立即生效,等待构建、部署、运行都完成后,再次用浏览器访问地址:http://192.168.121.131:18080/test ,得到响应如下图所示,可见刚才的改动可以立即生效:


至此,IEDA下的Docker插件配置和使用实战就完成了,希望您在选用该插件时,本文能给您提供一些参考。