step1：修改hosts的ip地址映射，创建eureka集群

可参考：https://www.cnblogs.com/noneplus/p/11374883.html

step2：创建服务提供者

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>zkrun.top</groupId>      <artifactId>msc-provider-5001</artifactId>      <version>1.0-SNAPSHOT</version>        <parent>          <groupId>org.springframework.boot</groupId>          <artifactId>spring-boot-starter-parent</artifactId>          <version>2.1.7.RELEASE</version>          <relativePath/> <!-- lookup parent from repository -->      </parent>        <properties>          <java.version>1.8</java.version>          <spring-cloud.version>Greenwich.SR2</spring-cloud.version>      </properties>        <dependencies>          <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>          </dependency>          <dependency>              <groupId>org.springframework.boot</groupId>              <artifactId>spring-boot-starter-test</artifactId>              <scope>test</scope>          </dependency>            <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-config</artifactId>          </dependency>          <!--        Eureka客户端启动需要依赖web模块-->          <dependency>              <groupId>org.springframework.boot</groupId>              <artifactId>spring-boot-starter-web</artifactId>          </dependency>            <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>          </dependency>            <dependency>              <groupId>org.springframework.boot</groupId>              <artifactId>spring-boot-starter-actuator</artifactId>          </dependency>            <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>          </dependency>          <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>          </dependency>      </dependencies>        <dependencyManagement>          <dependencies>              <dependency>                  <groupId>org.springframework.cloud</groupId>                  <artifactId>spring-cloud-dependencies</artifactId>                  <version>${spring-cloud.version}</version>                  <type>pom</type>                  <scope>import</scope>              </dependency>          </dependencies>      </dependencyManagement>        <build>          <plugins>              <plugin>                  <groupId>org.springframework.boot</groupId>                  <artifactId>spring-boot-maven-plugin</artifactId>              </plugin>          </plugins>      </build>        </project>

application.yaml

server:    port: 5001  spring:    application:      name: msc-provider  #应用名称  eureka:    client:      service-url:        defaultZone: http://eureka4001.com:4001/eureka/,http://eureka4002.com:4002/eureka/,http://eureka4003.com:4003/eureka/    instance:      instance-id: msc-provider-5001      prefer-ip-address: true     #访问路径可以显示IP地址

controller

package zkrun.top.controller;    import org.springframework.web.bind.annotation.GetMapping;  import org.springframework.web.bind.annotation.RestController;    @RestController  public class TestController {        @GetMapping(value = "/info/get")      public String response()      {          return "msc_provider_5001";      }      }

主类

package zkrun.top;      import org.springframework.boot.SpringApplication;  import org.springframework.boot.autoconfigure.SpringBootApplication;  import org.springframework.cloud.netflix.eureka.EnableEurekaClient;    @SpringBootApplication  @EnableEurekaClient  public class App_msc_provider_5001  {      public static void main(String[] args)      {          SpringApplication.run(App_msc_provider_5001.class, args);      }  }

step3：创建服务消费者【重要】

pom参考

<?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>zkrun.top</groupId>      <artifactId>msc-consumer-9001</artifactId>      <version>1.0-SNAPSHOT</version>            <parent>          <groupId>org.springframework.boot</groupId>          <artifactId>spring-boot-starter-parent</artifactId>          <version>2.1.7.RELEASE</version>          <relativePath/> <!-- lookup parent from repository -->      </parent>          <properties>          <java.version>1.8</java.version>          <spring-cloud.version>Greenwich.SR2</spring-cloud.version>      </properties>        <dependencies>          <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>          </dependency>          <dependency>              <groupId>org.springframework.boot</groupId>              <artifactId>spring-boot-starter-test</artifactId>              <scope>test</scope>          </dependency>            <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-config</artifactId>          </dependency>          <!--        Eureka客户端启动需要依赖web模块-->          <dependency>              <groupId>org.springframework.boot</groupId>              <artifactId>spring-boot-starter-web</artifactId>          </dependency>            <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>          </dependency>            <dependency>              <groupId>org.springframework.boot</groupId>              <artifactId>spring-boot-starter-actuator</artifactId>          </dependency>          <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-openfeign</artifactId>          </dependency>            <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>          </dependency>          <dependency>              <groupId>org.springframework.cloud</groupId>              <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>          </dependency>      </dependencies>        <dependencyManagement>          <dependencies>              <dependency>                  <groupId>org.springframework.cloud</groupId>                  <artifactId>spring-cloud-dependencies</artifactId>                  <version>${spring-cloud.version}</version>                  <type>pom</type>                  <scope>import</scope>              </dependency>          </dependencies>      </dependencyManagement>        <build>          <plugins>              <plugin>                  <groupId>org.springframework.boot</groupId>                  <artifactId>spring-boot-maven-plugin</artifactId>              </plugin>          </plugins>      </build>                  </project>

application.yaml

server:    port: 9001    spring:    application:      name: consumer-9001    eureka:    client:      serviceUrl:        defaultZone: http://eureka4001.com:4001/eureka/,http://eureka4002.com:4002/eureka/,http://eureka4003.com:4003/eureka/  management:    endpoints:      web:        exposure:          include: "*"        cors:          allowed-origins: "*"          allowed-methods: "*"

使用Feign作为客户端调用工具
- service接口
- package zkrun.top.service; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.RequestMapping; @FeignClient("msc-provider") //@FeignClient("服务名") @Component public interface Hystrix_FeignService { @RequestMapping(value = "/info/get") public String request(); }
- controller package zkrun.top.controller; import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; import zkrun.top.service.Hystrix_FeignService; @RestController public class Hystrix_FeignController { @Autowired Hystrix_FeignService hystrix_feignService; @RequestMapping(value = "/feign/info/get",method = RequestMethod.GET) @HystrixCommand(fallbackMethod = "hystrix_fallback") public String request() { return this.hystrix_feignService.request(); } public String hystrix_fallback() { return "当前服务故障，服务熔断已启动！"; } }
- 主类（注解有点多）
- package zkrun.top; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.hystrix.EnableHystrix; import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication @EnableEurekaClient @EnableHystrix @EnableHystrixDashboard @EnableCircuitBreaker @EnableFeignClients public class App_Consumer_9001 { public static void main(String[] args) { SpringApplication.run(App_Consumer_9001.class, args); } }

step4：Turbine监控服务

pom（spring-cloud-starter-netflix-turbine） <?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>zkrun.top</groupId> <artifactId>msc-turbine-dashboard-8001</artifactId> <version>1.0-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.7.RELEASE</version> <relativePath/> <!– lookup parent from repository –> </parent> <properties> <java.version>1.8</java.version> <spring-cloud.version>Greenwich.SR2</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <!– Eureka客户端启动需要依赖web模块–> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-ribbon</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-turbine</artifactId> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
application.yaml

server:    port: 8001    spring:    application:      name: service-turbine    eureka:    client:      serviceUrl:        defaultZone: http://eureka4001.com:4001/eureka/,http://eureka4002.com:4002/eureka/,http://eureka4003.com:4003/eureka/  management:    endpoints:      web:        exposure:          include: "*"        cors:          allowed-origins: "*"          allowed-methods: "*"    turbine:    app-config: consumer-9002,consumer-9001    aggregator:      clusterConfig: default    clusterNameExpression: new String("default")    combine-host: true    instanceUrlSuffix:      default: actuator/hystrix.stream

主类（注解）
package zkrun.top.zkrun.top; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.hystrix.EnableHystrix; import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard; import org.springframework.cloud.netflix.turbine.EnableTurbine; @SpringBootApplication @EnableEurekaClient @EnableDiscoveryClient @EnableHystrix @EnableHystrixDashboard @EnableCircuitBreaker @EnableTurbine public class TurbineService { public static void main(String[] args) { SpringApplication.run(TurbineService.class,args); } }