Dotnet微服务:使用Steeltoe集成Eureka

Eureka:Netflex旗下基于REST的一个中间件服务,用于解决微服务业务中的服务负载均衡及故障转移问题,具体表现为服务注册和服务发现二大核心功能点。Eureka包含两个组件:

1,服务注册中心:Eureka server。Eureka server负责服务注册,接受Eureka client的注册信息(服务名,端口,版本,协议等)并作保存,各节点的状态支持图形界面展示。由于Eureka是采用的HTTP协议,所以Eureka server的健康检查依赖于Eureka client的定时心跳上报,节点心跳频率默认为30s,注册中心默认在90秒内没有收该节点的心跳则剔除该节点。

2,节点:Eureka client。节点通过http向注册中心提交自己的注册信息并定时向注册中心上报自己的状态(默认30s),也会定时向注册中心拉取其保存的服务注册列表。

Eureka可配置内容如下可参考这篇博客:EUREKA配置详细说明

一,搭建服务注册中心

1,新建springboot项目,pom.xml中加入artifactId为:"spring-cloud-starter-netflix-eureka-server"和"spring-boot-starter-web"的依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

2,在springboot的启动类中启用Eureka注册中心注解

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

3,在src/main/resources中新建application.yml文件,配置如下:

server:
  port: 8081
eureka:
  instance:
    hostname: 127.0.0.1
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defalutZone: http://${eureka.instance.hostname}:${server.port}/eureka

4,启动项目并打开网页:http://localhost:8081即可进入eureka管理界面

 

 5,集成spring security对注册中心进行密码保护

   1),pom.xml加入artifactId为"spring-boot-starter-security"的依赖

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

  2),新建一个WebSecurityConfig类

import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
@EnableWebSecurity
public class WebSecurityConfig  extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        super.configure(http);
        http.csrf().disable();
    }
}

 3),配置文件application.yml进对密码配置

server:
port: 8081
spring:
security:
user:
name: liujb
password: 123456
eureka:
instance:
hostname: 127.0.0.1
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://localhost:8081/eureka

 4) 重启程序

 

 二,建立Eureka服务提供者(节点)

1, 与建议服务注册中心一样,pom.xml中加入artifactId为:"spring-cloud-starter-netflix-eureka-server"和"spring-boot-starter-web"的依赖

2,启动类启用@EnableEurekaClient注解

@EnableEurekaClient
@SpringBootApplication
public class EurekNodeApplication {

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

}

 

3,新建application.yml,配置如下内容

server:
  port: 8082
ek:
  username: liujb
  password: 123456
  eureka-url: 127.0.0.1
  eureka-port: 8081
eureka:
  client:
    service-url:
      defaultZone:
        http://${ek.username}:${ek.password}@${ek.eureka-url}:${ek.eureka-port}/eureka
spring:
  application:
    name: eureka-provide-1

 

4,打开注册中心,可以看到eureka-provide-1 已经注册成功

三,建立asp.net core 服务提供者

 1,新建一个web api项目并添加nuget程序包:Steeltoe.Discovery.ClientCore(2.1.1)

2,配置文件appsetting.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*",
  "spring": {
    "application": {
      "name": "eureka-provide-2"
    }
  },
  "eureka": {
    "client": {
      "serviceUrl": "http://eureka:123456@localhost:8765/eureka/",
      "shouldFetchRegistry": true,
      "validateCertificates": false
    },
    "instance": {
      "port": 8013,
      "preferIpAddress": true,
      "instanceId": "eureka-provide-2:8013"
    }
  }
}

3,Startup.Configservice方法中添加服务发现中间件:services.AddDiscoveryClient(Configuration);

4,Startup.Config方法中启用服务发现中间件:app.UseDiscoveryClient();

5,启动项目后服务注册成功

 

posted @ 2020-10-14 12:23  坚持坚持  阅读(410)  评论(0编辑  收藏  举报