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

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。

选择需要的配置或者直接在pom文件中手动添加

xml 复制代码

<?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>

修改 resource下application.properties配置文件
properties 复制代码
```
server.port=6001
```

DockerApplication启动类

java 复制代码

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);
    }

}

OrderController业务类

java 复制代码

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();
    }

}

执行主启动本地调试

打jar包上传至节点

bash 复制代码

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

编写Dockerfile

dockerfile 复制代码

# 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

构建镜像

bash 复制代码

[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

运行容器

复制代码

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

访问测试

bash 复制代码

 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