Basic use of Nacos (1) - getting started

Nacos Basic use of

One 、 Basic concepts

（1）Nacos：

Nacos It's a new open source project launched by Alibaba , It is a dynamic service discovery that is easier to build cloud native applications 、 Configuration management and service management platform .Nacos
Dedicated to helping you discover 、 Configure and manage microservices .Nacos
Provides an easy-to-use feature set , Helps you quickly implement dynamic service discovery 、 Service configuration 、 Service metadata and traffic management .Nacos
Helps you build more quickly and easily 、 Deliver and manage microservice platforms . Nacos Is to build in “ service ” Modern application architecture centered ( For example, the microservices paradigm 、 Cloud native paradigm )
Service infrastructure .

（2） Common registries ：

1. Eureka（ Native ,2.0 Performance bottlenecks , Stop maintenance ）

2. Zookeeper（ Support , Professional independent products . for example ：dubbo）

3. Consul（ Native ,GO Language development ）

4. Nacos

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be relative to Spring Cloud Eureka Come on ,Nacos More powerful .Nacos = Spring Cloud Eureka + Spring Cloud Config

Nacos It can be done with Spring, Spring Boot, Spring Cloud Integrate , And can replace Spring Cloud Eureka, Spring Cloud Config

• adopt Nacos Server and spring-cloud-starter-alibaba-nacos-discovery Implement service registration and discovery .

（3）Nacos function

Nacos Service oriented middleware ,Nacos Support all mainstream service discovery 、 Configure and manage .

Nacos It mainly provides the following four functions ：

1. Service discovery and service health monitoring

2. Dynamic configuration services

3. dynamic DNS service

4. Services and metadata management

（4）Nacos chart

You can put Nacos Understood as an intermediary , Connect consumers consumer And producers provider

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Two 、Nacos Download and install

1 Download address
github Address : https://github.com/alibaba/nacos/releases
2 start-up Nacos service

• Linux/Unix/Mac

Start command (standalone Stands for stand-alone mode operation , Non cluster mode )
Start command ：sh startup.sh -m standalone

• Windows

Start command ：cmd startup.cmd perhaps double-click startup.cmd Run the file .

visit ：http://localhost:8848/nacos

User name, password ：nacos/nacos

3、 ... and 、 Registration service

First step ： Introduce related dependencies into the module

stay pom.xml Add service registration related dependencies

		<!-- Service registration -->
        <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
         </dependency>

The second step ： Configure in the configuration file of the module to be registered

stay application.properties/yml Add nacos Service address

# Nacos Service address 
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

The third step ： add to Nacos annotation

Add @EnableDiscoveryClient annotation

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

@SuppressWarnings("all")
@SpringBootApplication
@ComponentScan(basePackages = "com.atguigu")// Scanning package 
@EnableDiscoveryClient // nacos register 
public class EduApplication {
    

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

Step four ： Restart project

The log output is as follows ：

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Launched the 3 A project , The registration center is shown in the figure