springCloud使用Nacos作为服务发现与注册中心，配置中心
使用Nacos作为服务发现注册中心配置中心，第一步，下载Naocs。此处使用docker下载安装完成Nacos.
docker上正在运行的Nacos,另外做了Nacos持久化配置
1，建立maven父工程
<?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>comphantom</groupId>
<artifactId>cloud</artifactId>
<version>1.0-SNAPSHOT</version>
<modules>
<module>payment-provider-9001</module>
<module>payment-provider-9002</module>
<module>order-consumer-80</module>
<module>config-server</module>
</modules>
<packaging>pom</packaging>
<!--统一管理jar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>1.16.18</lombok.version>
<druid.version>1.1.16</druid.version>
<mysql.version>5.1.47</mysql.version>
<mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
<alibaba.version>2.1.0.RELEASE</alibaba.version>
</properties>
<!--子模块继承之后，提供作用:锁定版本+子moudlue不用写groupId和version -->
<dependencyManagement>
<dependencies>
<!--spring boot 2.2.2-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.2.2.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 2.1.0.RELEASE-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.spring.boot.version}</version>
</dependency>
<!--druid-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
</dependencies>
</dependencyManagement>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!--fork:如果没有该项配置,整个devtools不会起作用-->
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</reporting>
</project>
这是父模块的pom依赖 ， 子模块继承之后，提供作用:锁定版本+子moudlue不用写groupId和version
2，建立子moudle,服务提供者（provider）
<?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>cloud</artifactId>
<groupId>comphantom</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>payment-provider9001</artifactId>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<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>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
主启动类上加
package com.phantom;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
/**
* @author : phantom
* @desc :
* @create : 2020/5/26 16:58
*/
@SpringBootApplication
@EnableDiscoveryClient
@RestController
public class Payment9001 {
@Value("${server.port}")
private String serverPort;
public static void main(String[] args) {
SpringApplication.run(Payment9001.class,args);
}
@GetMapping(value = "/payment/nacos/{id}")
public String getPayment(@PathVariable("id") Integer id){
return "nacos registry,serverort:"+serverPort+"\t "+id;
}
}
yml配置
server:
port: 9001
spring:
application:
name: payment-nacos-provider #服务名称
cloud:
nacos:
discovery: #服务注册地址
# server-addr: 127.0.0.1:8080 #集群版
server-addr: 127.0.0.1:8848 #单机版
management:
endpoints:
web:
exposure:
include: '*'
同理复制一份provider,即拥有两个服务提供者
3，建立服务消费者
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>cloud</artifactId>
<groupId>comphantom</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>order-consumer-80</artifactId>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<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>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
主启动类配置
package com.phantom;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* @author : phantom
* @desc :
* @create : 2020/5/26 17:08
*/
@SpringBootApplication
@EnableDiscoveryClient
public class Order80 {
public static void main(String[] args) {
SpringApplication.run(Order80.class,args);
}
}
消费者需要调用服务提供者提供的服务，因为Nacos集成了Ribbon,因而可以直接配置负载均衡RestTemplate
package com.phantom.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;
/**
* @author : phantom
* @desc : 负载均衡RestTemplate
* @create : 2020/5/26 16:06
*/
@Configuration
public class ApplicationContextConfig {
@Bean
@LoadBalanced//负载均衡算法
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
控制类
package com.phantom.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.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
/**
* @author : phantom
* @desc :
* @create : 2020/5/26 16:08
*/
@RestController
public class OrderController {
@Autowired
private RestTemplate restTemplate;
@Value("${service-url.nacos-user-service}")
private String serverURL;
@GetMapping(value = "/consumer/payment/nacos/{id}")
public String paymentInfo(@PathVariable("id") Integer id){
return restTemplate.getForObject(serverURL + "/payment/nacos/" + id, String.class);
}
}
yml配置
server:
port: 80
spring:
application:
name: order-nacos-consumer
cloud:
nacos:
discovery:
# server-addr: 127.0.0.1:8080 #集群版
server-addr: 127.0.0.1:8848 #单机版
management:
endpoints:
web:
exposure:
include: '*'
# 消费者将要访问的微服务名称
service-url:
nacos-user-service: http://payment-nacos-provider
4，配置中心
1，resource下建立文件bootstrap.yml文件
spring:
cloud:
nacos:
config:
file-extension: yml #指定yml格式的配置
# server-addr: 127.0.0.1:8080 #nacos作为配置中心的地址 集群版
server-addr: 127.0.0.1:8848 #单机版
# group: TEST_GROUP #命名空间分组区别配置文件
discovery:
# server-addr: 127.0.0.1:8080 #nacos服务中心的注册地址 集群版
server-addr: 127.0.0.1:8848 #单机版
application:
name: nacos-config-client
server:
port: 3377
2.application.yml文件配置
spring:
profiles:
active: dev #开发环境
# active: test #测试环境
# active: info #开发环境
3.主启动类配置
package com.phantom;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* @author : phantom
* @desc : 配置中心
* @create : 2020/5/26 17:25
*/
@SpringBootApplication
@EnableDiscoveryClient
public class NacosConfigClientMain3377 {
public static void main(String[] args) {
SpringApplication.run(NacosConfigClientMain3377.class,args);
}
}
4.控制类配置
package com.phantom.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author : phantom
* @desc :
* @create : 2020/5/26 21:05
*/
@RestController
@RefreshScope //支持nacos动态刷新
public class ConfigController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/config/info")
public String getConfigInfo()
{
return configInfo;
}
}
5.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">
<parent>
<artifactId>cloud</artifactId>
<groupId>comphantom</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>config-server</artifactId>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</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>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
一切配置好后，启动Nacos,然后启动微服务，当页面出现如下则表明配置成功
