四、Nacos服務(wù)注冊

1.Nacos簡介

1.2.為什么叫Nacos？

前四個字母分別為Naming和Configuration的前兩個字母，最后的s為Service

1.3.是什么?

  • 一個更易于構(gòu)建云原生應(yīng)用的動態(tài)服務(wù)發(fā)現(xiàn)，配置管理和服務(wù)管理中心
  • Nacos：Dynamic Naming and Configuration Service
  • Nacos就是注冊中心+配置中心的組合（等價于：Nacos = Eureka+Config+Bus）

1.4.能干嘛？

  • 替代Eureka做服務(wù)注冊中心
  • 替代Config做服務(wù)配置中心

1.5.去哪下?

官方下載
官網(wǎng)文檔

1.6.各種注冊中心比較

2.安裝并運行Nacos

  • 本地Java8+Maven環(huán)境已經(jīng)OK
  • 先從官網(wǎng)下載Nacos
  • 解壓安裝包，直接運行bin目錄下的startup.cmd
  • 命令運行成功后直接訪問http: //localhost:8848/nacos(默認賬號密碼都是nacos)
  • 運行結(jié)果頁面如下

3.Nacos作為服務(wù)注冊中心演示

3.1.搭建工程

3.1.1.父工程spingcloud20

（1）pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.xiaoliu</groupId>
    <artifactId>spingcloud20</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <!--統(tǒng)一管理jar包和版本-->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.18.10</lombok.version>
        <mysql.version>5.1.47</mysql.version>
        <druid.verison>1.1.16</druid.verison>
        <mybatis.plus.boot.verison>3.2.0</mybatis.plus.boot.verison>
    </properties>


    <!--子模塊繼承之后，提供作用：鎖定版本+子model不用寫groupId和version-->
    <dependencyManagement>
        <dependencies>
            <!--spring boot 2.2.0-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.2.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud Hoxton.SR1-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud alibaba 2.2.1.RELEASE-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!-- MySql -->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            <!-- Druid -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>${druid.verison}</version>
            </dependency>
            <!-- mybatis-plus-springboot整合 -->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis.plus.boot.verison}</version>
            </dependency>
            <!--lombok-->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </dependency>
            <!--junit-->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
            </dependency>
            <!-- log4j -->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

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

</project>

3.1.2.公共子模塊cloud-api-commons

（1）pom.xml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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spingcloud20</artifactId>
        <groupId>com.xiaoliu</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-api-commons</artifactId>

    <dependencies>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>
</project>
（2）統(tǒng)一返回結(jié)果R.java
package com.xiaoliu.entity;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import java.util.HashMap;
import java.util.Map;

/**
 * 統(tǒng)一返回結(jié)果類
 * @Author LL
 * @Date 2020-04-07 10:27
 */
@Data
public class R{

    private Boolean success;//是否成功
    private Integer code;//返回碼
    private String message;//返回信息
    private Map<String,Object> data = new HashMap<>();//返回數(shù)據(jù)

    /**
     * 構(gòu)造方法私有化
     */
    private R(){}

    /**
     * 成功的靜態(tài)方法
     * @return R
     */
    public static R ok(){
        R r = new R();
        r.setSuccess(true);
        r.setCode(200);
        r.setMessage("成功");
        return r;
    }

    /**
     * 失敗的靜態(tài)方法
     * @return R
     */
    public static R error(){
        R r = new R();
        r.setSuccess(false);
        r.setCode(999);
        r.setMessage("失敗");
        return r;
    }
    public R success(Boolean success){
        this.setSuccess(success);
        return this;
    }
    public R message(String message){
        this.setMessage(message);
        return this;
    }
    public R code(Integer code){
        this.setCode(code);
        return this;
    }
    public R data(Map<String, Object> map){
        this.setData(map);
        return this;
    }
    public R data(String key,Object value){
        this.data.put(key,value);
        return this;
    }
}
（3）公共實體類Payment.java
package com.xiaoliu.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
import java.io.Serializable;

/**
 *
 * @Author LL
 * @Date 2020-04-07 10:22
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true)
public class Payment implements Serializable {

    private Long id;
    private String serial;
}

3.2.基于Nacos的服務(wù)提供者 cloudalibaba-provider-payment9001

（1）pom.xml文件
 <dependencies>
        <!-- nacos-discovery -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</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-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </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>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>
    </dependencies>
（2）application.yml文件
server:
  port: 9001

spring:
  application:
    name: nacos-payment-provider
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.10.33:8848 #配置Nacos地址

management:
  endpoints:
    web:
      exposure:
        include: '*'
（3）PaymentMain9001.java
package com.xiaoliu;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @Author LL
 * @Date 2020-07-07 13:22
 */
@EnableDiscoveryClient
@SpringBootApplication
public class PaymentMain9001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain9001.class, args);
    }
}
（4）PaymentController.java
package com.xiaoliu.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Author LL
 * @Date 2020-07-07 13:23
 */
@RestController
public class PaymentController {

    @Value("${server.port}")
    private String serverPort;

    @GetMapping(value = "/payment/nacos/{id}")
    public String getPayment(@PathVariable("id") Integer id)
    {
        return "nacos registry, serverPort: "+ serverPort+"\t id="+id;
    }
}

3.3.基于Nacos的服務(wù)提供者 cloudalibaba-provider-payment9002

仿cloudalibaba-provider-payment9001創(chuàng)建，其中端口號為9002

3.4.基于Nacos的服務(wù)消費者 cloudalibaba-consumer-nacos-order83

（1）pom.xml

 <dependencies>
        <!--SpringCloud ailibaba nacos -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.xiaoliu</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </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-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </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>

（2）application.yml

server:
  port: 83

spring:
  application:
    name: nacos-order-consumer
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.10.33:8848

（3）OrderNacosMain83.java

package com.xiaoliu;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

/**
 * @Author LL
 * @Date 2020-07-07 14:11
 */
@EnableDiscoveryClient
@SpringBootApplication
public class OrderNacosMain83 {
    public static void main(String[] args) {
        SpringApplication.run(OrderNacosMain83.class, args);
    }

    @Bean
    @LoadBalanced//負載均衡
    public RestTemplate getRestTemplate()
    {
        return new RestTemplate();
    }
}

（4）OrderNacosController.java

package com.xiaoliu.controller;

import com.xiaoliu.service.PaymentFeignService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @Author LL
 * @Date 2020-07-07 14:27
 */
@RestController
public class OrderNacosController {

    @Autowired
    private RestTemplate restTemplate;

    //ribbon負載均衡使用
    @GetMapping(value = "/consumer/payment/nacos/{id}")
    public String paymentInfo(@PathVariable("id") Integer id)
    {
        String url = "http://nacos-payment-provider/payment/nacos/"+id;
        return  "使用ribbon："+restTemplate.getForObject(url, String.class);
    }
}

說明：Nacos中自帶負載均衡Ribbon，為什么Nacos支持負載均衡？

3.5.測試

啟動項目，nacos控制臺顯示如下

http:// localhost:83/consumer/payment/nacos/13 ，83訪問9001/9002，輪詢負載OK

?著作權(quán)歸作者所有,轉(zhuǎn)載或內(nèi)容合作請聯(lián)系作者
【社區(qū)內(nèi)容提示】社區(qū)部分內(nèi)容疑似由AI輔助生成，瀏覽時請結(jié)合常識與多方信息審慎甄別。
平臺聲明：文章內(nèi)容（如有圖片或視頻亦包括在內(nèi)）由作者上傳并發(fā)布，文章內(nèi)容僅代表作者本人觀點，簡書系信息發(fā)布平臺，僅提供信息存儲服務(wù)。

友情鏈接更多精彩內(nèi)容