6.Nacos 2.x

1.单机部署

? 1.1 官网

https://nacos.io/zh-cn/index.html
https://github.com/alibaba/Nacos

? 1.2.版本说明

https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E

Spring Cloud Alibaba Version	Spring Cloud Version	Spring Boot Version
2.2.10-RC1*	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.9.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.8.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.7.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.6.RELEASE	Spring Cloud Hoxton.SR9	2.3.2.RELEASE

Nacos?版本关系,?2.2.6.RELEASE是1.x版本及以下，单机没体现主要是集群需要配置grpc端口号

1.3.下载地址

https://github.com/alibaba/nacos/releases/tag/2.2.0

? 1.4.安装

? ??解压安装包，直接运行bin目录下,默认账号密码都是nacos,命令运行成功后直接访问http://localhost:8848/nacos,结果页面

startup.cmd -m standalone

2.注册中心

? ? 2.1 支付项目

? ? 1)?父POM

? ? 2.2.6.RELEASE是2.x和1.x版本的分界线，2集群时必须配置grpc的端口映射

 <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.10-RC1</version>
                <type>pom</type>
                <scope>import</scope>
</dependency>

? ? 2) POM

 <!--nacos-->
<dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

? ? 3) YML

server:
  port: 9001

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

? ? 4) 主程序

@EnableDiscoveryClient
@SpringBootApplication
public class PaymentMain9001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain9001.class,args);
    }
}

? 2.2 订单项目

? ? 1) POM

 <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

? ? 2) YML

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

? ? 3)?主程序

@EnableDiscoveryClient
@SpringBootApplication
public class OrderNacosMain {

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

? ? 4) 业务类

? ? ? ? ApplicationContextBean

@Configuration
public class ApplicationContextBean {

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

? ? ? ?OrderNacosController

@RestController
public class OrderController {

    @Resource
    private RestTemplate restTemplate;

    private String serverURL = "http://nacos-payment-service";

    @GetMapping(value = "/payment/get/{id}")
    public String paymentInfo(@PathVariable("id") Long id)
    {
        return restTemplate.getForObject(serverURL+"/payment/get/"+id,String.class);
    }

}

3.配置中心

? 3.1 POM

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

? 3.2 YOM

? ? ?1)?bootstrap.yml

????????此文件不写，yaml格式无法加载

spring:
  profiles:
    active: dev
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
      config:
        server-addr: localhost:8848
        file-extension: yaml

? ? 2)?application.yml

server:
  port: 8001
spring:
  application:
    name: nacos-payment-service

? 3.3?业务类

@RestController
@RefreshScope
public class ConfigClientController
{
    @Value("${config.info}")
    private String configInfo;

    @GetMapping("/config/info")
    public String getConfigInfo() {
        return configInfo;
    }
}

?通过 Spring Cloud 原生注解@RefreshScope??实现配置自动更新

? 3.4?Nacos中添加配置信息

? ? 1) 配置规格

${prefix}-${spring.profiles.active}.${file-extension}

? ? 2) 说明

• prefix?默认为?spring.application.name?的值，也可以通过配置项?spring.cloud.nacos.config.prefix来配置
• spring.profiles.active?即为当前环境对应的 profile
• file-exetension?为配置内容的数据格式,可以通过配置项?spring.cloud.nacos.config.file-extension?来配置,官网上说目前只支持?properties?和?yaml?类型，但我的版本只有properties?成功过

? ? 3) 配置新增

4.配置mysql

? 修改配置文件application.properties

spring.datasource.platform=mysql

### Count of DB:
db.num=1

### Connect URL of DB:
db.url.0=jdbc:mysql://192.168.2.18:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
db.user.0=root
db.password.0=root

### Connection pool configuration: hikariCP
db.pool.config.connectionTimeout=30000
db.pool.config.validationTimeout=10000
db.pool.config.maximumPoolSize=20
db.pool.config.minimumIdle=2

启动

startup.cmd

5.集群配置

? 1) 单机配置:

? ?修改配置配置文件cluster.conf

192.168.2.93:8840
192.168.2.93:8850
192.168.2.93:8860

?? 2) nginx 配置

tream{
   upstream nacos-cluster-tcp{
	   server 192.168.2.18:9840;
	   server 192.168.2.18:9850;
	   server 192.168.2.18:9860;
  }
  
  server{
	listen 9848;
	proxy_pass nacos-cluster-tcp;
  }
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    
    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;
	
	upstream nacos-cluster{
	  server 192.168.2.18:8840;
	  server 192.168.2.18:8850;
	  server 192.168.2.18:8860;
	}
 
    server {
        listen       8848;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
        }
		
		location /nacos {	
	        proxy_pass http://nacos-cluster;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
 
    }

}

? ?3) 程序bootstrap.yml

spring:
  profiles:
    active: dev
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.2.18:8848
      config:
        server-addr: 192.168.2.18:8848
        file-extension: yaml