SpringCloud-Nacos

一、介绍

（1）作为服务注册中心和配置中心
（2）等价于：Eureka+Config+Bus
（3）nacos集成了ribbon，支持负载均衡

二、安装

（1）官网
（2）

（3）如果是单节点部署，修改startup.cmd后启动

（4）运行http://localhost:8848/nacos/
（5）

三、编写服务提供者

（1）编写pom.xml

<?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>demo20220821</artifactId>
        <groupId>com.wsh.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloudalibaba-provider-payment9001</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.wsh.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>1.0-SNAPSHOT</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.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

（2）编写application.yml

server:
  port: 9001

spring:
  application:
    name: cloudalibaba-provider-payment
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848

management:
  endpoints:
    web:
      exposure:
        include: "*"

（3）编写启动类

package com.wsh.springcloud;

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

/**
 * @ClassName ConfigMain3344
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/15
 * @Version V1.0
 **/
@SpringBootApplication
@EnableDiscoveryClient
public class ProviderPayment9001 {
    public static void main(String[] args) {
        SpringApplication.run(ProviderPayment9001.class, args);
    }
}

（4）编写Controller

package com.wsh.springcloud.controller;

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

/**
 * @ClassName TestController
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/18
 * @Version V1.0
 **/
@RestController
public class TestController {

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

    @GetMapping("/payment/test")
    public String test(){
        return "test: " + port;
    }
}

（5）启动

（6）按照此配置创建9002，运行

四、编写服务提供者

（1）编写pom.xml

<?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>demo20220821</artifactId>
        <groupId>com.wsh.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloudalibaba-consumer-order83</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.wsh.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>1.0-SNAPSHOT</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.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

（2）编写application.yml

server:
  port: 83

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

management:
  endpoints:
    web:
      exposure:
        include: "*"

server-url: http://cloudalibaba-provider-payment

（3）编写启动类

package com.wsh.springCloud;

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

/**
 * @ClassName ConsumerOrder83
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/18
 * @Version V1.0
 **/
@EnableDiscoveryClient
@SpringBootApplication
public class ConsumerOrder83 {

    public static void main(String[] args) {
        SpringApplication.run(ConsumerOrder83.class, args);
    }
}

（4）编写配置类

package com.wsh.springCloud.config;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * @ClassName MyConfig
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/18
 * @Version V1.0
 **/
@Configuration
public class MyConfig {

    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

（5）编写Controller

package com.wsh.springCloud.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @ClassName TestController
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/18
 * @Version V1.0
 **/
@RestController
public class TestController {

    @Value("${server-url}")
    private String url;

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consumer/test")
    public String test(){
        String rtn = restTemplate.getForObject(url + "/payment/test", String.class);
        return rtn;
    }
}

（6）运行

五、编写服务配置中心客户端

（1）编写pom.xml

<?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>demo20220821</artifactId>
        <groupId>com.wsh.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloudalibaba-config-client3377</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>com.wsh.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>1.0-SNAPSHOT</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.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

（2）编写bootstrap.yaml

server:
  port: 3377

spring:
  application:
    name: cloudalibaba-config-client
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
      config:
        server-addr: localhost:8848
        file-extension: yaml

management:
  endpoints:
    web:
      exposure:
        include: "*"

（3）编写application.yaml

spring:
  profiles:
    active: dev

（4）编写启动类

package com.wsh.springcloud;

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

/**
 * @ClassName ConfigMain3344
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/15
 * @Version V1.0
 **/
@SpringBootApplication
@EnableDiscoveryClient
public class ConfigClient3377 {
    public static void main(String[] args) {
        SpringApplication.run(ConfigClient3377.class, args);
    }
}

（5）编写Controller

package com.wsh.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @ClassName TestController
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/18
 * @Version V1.0
 **/
@RestController
@RefreshScope
public class TestController {

    @Value("${myInfo}")
    private String myInfo;

    @GetMapping("/configClient/myInfo")
    public String test(){
        return "myInfo: " + myInfo;
    }
}

（6）nacos添加配置（DataID = spring.application.name + spring.profiles.active + spring.cloud.nacos.config.file-extension）

（7）运行

六、命名空间、组名、DataId

（1）

（2）

（3）同时测试命名空间、组名、DataId
a、修改bootstrap.yaml

server:
  port: 3377

spring:
  application:
    name: cloudalibaba-config-client
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
      config:
        server-addr: localhost:8848
        file-extension: yaml
        namespace: e9b0b33c-533d-4c8d-9e77-6a91e9dd2f5f
        group: TEST

management:
  endpoints:
    web:
      exposure:
        include: "*"

b、新建命名空间TEST

c、创建配置

d、运行

七、配置持久化

（1）运行\nacos\conf下的mysql-schema.sql

（2）编写\nacos\conf下的application.properties

（3）运行

八、linux安装

（1）修改conf下的application.properties

（2）开放端口8848iptables -I IN_public_allow -s 0.0.0.0/0 -p tcp --dport 8848 -j ACCEPT
（3）执行./startup.sh