8.Docker微服务实战

文章目录

• 1、创建微服务
• 2、通过Dockerfile发布微服务

1、创建微服务

1. 创建空项目并在其中创建一个Module

   

​ 这里使用start.aliyun.com代替start.spring.io,这样可以使用jdk8。

2. 选择需要的配置或者直接在pom文件中手动添加

   

   <?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>
       <groupId>com.hpu</groupId>
       <artifactId>docker</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <name>docker</name>
       <description>docker</description>
       <properties>
           <java.version>1.8</java.version>
           <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
           <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
           <spring-boot.version>2.6.13</spring-boot.version>
       </properties>
       <dependencies>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-jdbc</artifactId>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-web</artifactId>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-actuator</artifactId>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-web-services</artifactId>
           </dependency>
   <!--        <dependency>-->
   <!--            <groupId>org.mybatis.spring.boot</groupId>-->
   <!--            <artifactId>mybatis-spring-boot-starter</artifactId>-->
   <!--            <version>2.2.2</version>-->
   <!--        </dependency>-->
   
           <dependency>
               <groupId>org.projectlombok</groupId>
               <artifactId>lombok</artifactId>
               <optional>true</optional>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-test</artifactId>
               <scope>test</scope>
           </dependency>
       </dependencies>
       <dependencyManagement>
           <dependencies>
               <dependency>
                   <groupId>org.springframework.boot</groupId>
                   <artifactId>spring-boot-dependencies</artifactId>
                   <version>${spring-boot.version}</version>
                   <type>pom</type>
                   <scope>import</scope>
               </dependency>
           </dependencies>
       </dependencyManagement>
   
       <build>
           <plugins>
               <plugin>
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-compiler-plugin</artifactId>
                   <version>3.8.1</version>
                   <configuration>
                       <source>1.8</source>
                       <target>1.8</target>
                       <encoding>UTF-8</encoding>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-resources-plugin</artifactId>
                   <version>3.1.0</version>
               </plugin>
               <plugin>
                   <groupId>org.springframework.boot</groupId>
                   <artifactId>spring-boot-maven-plugin</artifactId>
                   <version>${spring-boot.version}</version>
                   <executions>
                       <execution>
                           <id>repackage</id>
                           <goals>
                               <goal>repackage</goal>
                           </goals>
                       </execution>
                   </executions>
               </plugin>
           </plugins>
       </build>
   
   </project>

3. 修改 resource下application.properties配置文件

   server.port=6001

4. DockerApplication启动类

   package com.hpu.docker;
   
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
   
   @SpringBootApplication
   @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
   public class DockerApplication {
   
       public static void main(String[] args) {
           SpringApplication.run(DockerApplication.class, args);
       }
   
   }

5. OrderController业务类

   package com.hpu.docker.demos.web;
   
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RequestMethod;
   import org.springframework.web.bind.annotation.RestController;
   
   import java.util.UUID;
   
   /**
    * @auther zyn
    * @create 2024-05-19 17:43
    */
   @RestController
   public class OrderController
   {
       @Value("${server.port}")
       private String port;
   
       @RequestMapping("/order/docker")
       public String helloDocker()
       {
           return "hello docker"+"\t"+port+"\t"+ UUID.randomUUID().toString();
       }
   
       @RequestMapping(value ="/order/index",method = RequestMethod.GET)
       public String index()
       {
           return "服务端口号: "+"\t"+port+"\t"+UUID.randomUUID().toString();
       }
   
   }

6. 执行主启动本地调试

   

7. 打jar包上传至节点

   scp /Users/***/zyn/JavaProject/Docker/docker/target/docker-0.0.1-SNAPSHOT.jar root@192.168.49.101:/root/service

2、通过Dockerfile发布微服务

1. 编写Dockerfile

   # 基础镜像使用java
   FROM java:8
   # 根据操作系统架构不同，x86选择java:8,aarch64选择openjdk:8-jdk，否则报错The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
   #FROM openjdk:8-jdk
   # 作者
   MAINTAINER zyn
   # VOLUME 指定临时文件目录为/tmp，在主机/var/lib/docker目录下创建了一个临时文件并链接到容器的/tmp
   VOLUME /tmp
   # 将jar包添加到容器中并更名为zyn_docker.jar
   ADD docker-0.0.1-SNAPSHOT.jar zyn_docker.jar
   # 运行jar包
   #RUN bash -c 'touch /zyn_docker.jar'
   ENTRYPOINT ["java","-jar","/zyn_docker.jar"]
   #暴露8080端口作为微服务
   EXPOSE 6001

2. 构建镜像

   [root@zyn01 service]#docker build -t zynservice:1.0 .
   [root@zyn01 service]# docker images
   REPOSITORY     TAG       IMAGE ID       CREATED          SIZE
   zynservice     1.0       990e31e212d2   28 minutes ago   544MB

3. 运行容器

   docker run -d -p 6001:6001 zynservice:1.0
   

4. 访问测试

    curl 192.168.49.101:6001/order/index
   服务端口号: 	6001	8706d157-a12b-416c-9325-4e544bcc5e0a
    curl 192.168.49.101:6001/order/docker
    hello docker	6001	d20bba4e-0787-4021-917e-cb39a26b413d