Docker遇到Intellij IDEA,Java开发提升了十倍生产力

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一、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

3. 重启docker

systemctl daemon-reload
 systemctl restart docker

4.开放端口

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

5.Idea安装docker插件,重启

6.连接远程docker

(1) 编辑配置

(2) 填远程docker地址

(3) 连接成功，会列出远程docker容器和镜像

二、新建项目

创建springboot项目

项目结构图

(1) 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.fengqi</groupId>
    <artifactId>dockerDemo</artifactId>
    <version>1.0.0</version>
    <relativePath>../pom.xml</relativePath> <!-- lookup parent from repository -->
  </parent>
  <groupId>com.fengqi</groupId>
  <artifactId>web</artifactId>
  <version>1.0.0</version>
  <name>web</name>
  <description>Demo project for Spring Boot</description>
  
 <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
    </dependency>
 
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </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>
          <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>

(2) 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"]

(3) 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

(4) 创建DockerApplication文件

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

(5) 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!";
 }
}

(6) 增加配置

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springboot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。

(7) Maven打包

(8) 运行

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

(9) 运行成功

(10) 浏览器访问

(11) 日志查看