Idea遠端一鍵部署SpringBoot到Docker

Idea是Java開發利器，SpringBoot是Java生态中最流行的微服務架構，docker是時下最火的容器技術，那麼它們結合在一起會産生什麼化學反應呢？

轉自: 陶章好

文章: https://juejin.im/post/6844903865192562696

一、開發前準備

1. Docker的安裝可以參考

   https://docs.docker.com/install/

2. 配置docker遠端連接配接端口

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

修改ExecStart,如下圖所示

ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock

1. 重新開機docker

systemctl daemon-reload

systemctl start docker

1. 開放端口

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

1. Idea安裝插件,重新開機

   

2. 連接配接遠端docker

   

   (1) 編輯配置

   

   (2) 填遠端docker位址

   

(3) 連接配接成功，會列出遠端docker容器和鏡像

二、建立項目

1. 建立springboot項目

項目結構圖

(1) 配置pom檔案

<?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>
           

(2) 在src/main目錄下建立docker目錄，并建立Dockerfile檔案

FROM openjdk:8-jdk-alpine
ADD *.jar app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
           

(3) 在resource目錄下建立application.properties檔案

logging.config=classpath:logback.xml
logging.path=/home/developer/app/logs/
server.port=8990
           

(4) 建立DockerApplication檔案

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

(5) 建立DockerController檔案

@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

指令解釋

Image tag : 指定鏡像名稱和tag，鏡像名稱為 docker-demo，tag為1.1

Bind ports : 綁定主控端端口到容器内部端口。格式為[主控端端口]:[容器内部端口]

Bind mounts : 将主控端目錄挂到到容器内部目錄中。格式為[主控端目錄]:[容器内部目錄]。這個springboot項目會将日志列印在容器/home/developer/app/logs/ 目錄下，将主控端目錄挂載到容器内部目錄後，那麼日志就會持久化容器外部的主控端目錄中。

(7) Maven打包

(8) 運作

先pull基礎鏡像，然後再打包鏡像，并将鏡像部署到遠端docker運作

這裡我們可以看到鏡像名稱為docker-demo:1.1，docker容器為docker-server

(9) 運作成功

(10) 浏覽器通路

(11) 日志檢視

自此通過idea 部署springboot項目到docker成功！難以想象，部署一個Javaweb項目竟然如此簡單友善！