Nacos集群安装和使用

一、nacos集群安装

1、下载nacos的二进制压缩包 https://github.com/alibaba/nacos/releases

2、解压下载下来的nacos的二进制压缩包

3、修改配置文件 cluster.conf.example 把这个文件改个文件名 cluster.conf

4、再cluster.conf配置文件中添加集群ip和端口号  ip必须用真实ip 如果本机搭建集群也不能用127.0.0.1

        #example
        192.168.101.71:8841
        192.168.101.71:8842
        192.168.101.71:8843

5、修改application.properties配置文件内容

    server.port=8841

    spring.datasource.platform=mysql

    db.num=1

db.url.0=jdbc:mysql://127.0.0.1:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
db.user.0=root
db.password.0=root

6、将配置好的nacos目录复制三份  分别修改application.properties配置文件里的端口号  分别是8842，8843

7、执行config 目录下的nacos sql脚本 nacos-mysql.sql

8、配置nginx 通过nginx 负载到对应的nacos节点

       （1）下载nginx  http://nginx.org/en/download.html

       （2） 解压nginx

       （3）配置nginx 再http模块下配置如下内容

    upstream nacos{
        server 127.0.0.1:8841;
        server 127.0.0.1:8842;
        server 127.0.0.1:8843;
    }
    server {
        listen       80;
        server_name  localhost;

        location /nacos {
             proxy_pass http://nacos;
        }
    }

（4）启动nginx

9、启动三台nacos   命令 startup.sh   出现如下提示表示启动成功

 

10、访问 http://localhost/nacos   默认用户名和密码都是nacos

        

 

二、nacos 注册中心

1、新建maven 服务提供者项目 导入pom依赖

<?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.xiao</groupId>
    <artifactId>nacosprovider</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <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>2.3.0.RELEASE</spring-boot.version>
        <spring-cloud-alibaba.version>2.2.1.RELEASE</spring-cloud-alibaba.version>
    </properties>
    <dependencies>

        <!--spring boot web依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <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-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!--spring-boot-starter-actuator-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

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

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${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>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2，新建提供者启动类

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

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

3、新建controller

@RestController
public class EchoController {

   @Value("${server.port}")
    private String port;
    @GetMapping("/")
    public String index() {
        return port;
    }
}

4、新建application.yml配置文件

 

server:
  port: 8081
spring:
  application:
    name: nacos-provider
  cloud:
    nacos:
      discovery:
        server-addr: localhost:80
        password: nacos
        username: nacos

5、启动两个提供者项目

6、查看nacos 注册中心

        

7、新建消费者 项目 导入maven依赖

<?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>nacosprovider</artifactId>
        <groupId>com.xiao</groupId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../nacosprovider/pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>nacosconsumer</artifactId>

    <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>2.3.0.RELEASE</spring-boot.version>
        <spring-cloud-alibaba.version>2.2.1.RELEASE</spring-cloud-alibaba.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>
        <!--spring boot web依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <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-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${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>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

8、新建消费者启动类

@EnableDiscoveryClient
@SpringBootApplication
@EnableFeignClients
public class Application {
    @LoadBalanced
    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

9、新建application.yml 配置文件

server:
  port: 8083
spring:
  application:
    name: nacos-consumer
  cloud:
    nacos:
      discovery:
        server-addr: localhost:80
        password: nacos
        username: nacos

10、新建消费者controller

@RestController
public class TestController {		

	@GetMapping("/test")
	public String test() {
		return restTemplate.getForObject("http://nacos-provider/", String.class);
	}
}

12、启动消费者项目 访问 http://127.0.0.1:8083/test 

三、nacos 配置中心

1、加入配置中心pom依赖

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

2、新建bootstrap.application配置文件

#端口号
server.port=8080
#应用名
spring.application.name=nacos-config
#注册中心地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:80
#nacos用户名
spring.cloud.nacos.username=nacos
#nacos密码
spring.cloud.nacos.password=nacos
#配置中心地址
spring.cloud.nacos.config.server-addr=127.0.0.1:80
#配置中心扩展名
spring.cloud.nacos.config.file-extension=yaml
#配置中心组
spring.cloud.nacos.config.group=test
#配置文件启动环境
spring.profiles.active=test
#多环境时Data Id配置规则 应用名-环境.扩展名
# ${spring.application.name}-${spring.profiles.active}.${file-extension:properties}

3、新建测试controller

package com.xiao.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;

@RestController
@RefreshScope
public class ConfigController {
    @Value("${user.name}")
    private String name;
    @Value("${user.age}")
    private String age;
    @GetMapping("config")
    public String config(){
        return name + "-" + age;
    }
}

6、再nacos控制台新建配置

7、访问http://127.0.0.1:8080/config