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一、feign 申明式客户端接口
微服务利用中,ribbon 和 hystrix 总是同时呈现,feign 整合了两者,并提供了 申明式消费者 客户端
- 用 feign 代替 hystrix+ribbon
1. 新建 sp09-feign 我的项目
2. 增加依赖
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>cn.tedu</groupId>
<artifactId>sp09-feign</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sp09-feign</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<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-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</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>
</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>
3. 批改 application.yml 文建
spring:
application:
name: feign
server:
port: 3001
eureka:
client:
service-url:
defaultZone: http://eureka1:2001/eureka, http://eureka2:2002/eureka
4. 主程序增加 @EnableFeignClients
注解
package cn.tedu.sp09;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class Sp09FeignApplication {public static void main(String[] args) {SpringApplication.run(Sp09FeignApplication.class, args);
}
}
5. feign 申明式客户端
feign 利用了咱们相熟的 spring mvc 注解来对接口办法进行设置,升高了咱们的学习老本。
通过这些设置,feign 能够拼接后盾服务的拜访门路和提交的参数
例如:@GetMapping("/{userId}/score")
JsonResult addScore(@PathVariable Integer userId, @RequestParam Integer score);
当这样调用该办法:
service.addScore(7, 100);
那么 feign 会向服务器发送申请:
http:// 用户微服务 /7/score?score=100
- 留神:如果 score 参数名与变量名不同,须要增加参数名设置:
@GetMapping("/{userId}/score")
JsonResult addScore(@PathVariable Integer userId, @RequestParam("score") Integer s);
5.1 ItemFeignService
package cn.tedu.sp09.service;
import java.util.List;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import cn.tedu.sp01.pojo.Item;
import cn.tedu.web.util.JsonResult;
@FeignClient("item-service")
public interface ItemFeignService {@GetMapping("/{orderId}")
JsonResult<List<Item>> getItems(@PathVariable String orderId);
@PostMapping("/decreaseNumber")
JsonResult decreaseNumber(@RequestBody List<Item> items);
}
5.2 UserFeignService
- 留神, 如果申请参数名与办法参数名不同,
@RequestParam
不能省略, 并且要指定申请参数名:@RequestParam("score") Integer s
package cn.tedu.sp09.service;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestParam;
import cn.tedu.sp01.pojo.User;
import cn.tedu.web.util.JsonResult;
@FeignClient("user-service")
public interface UserFeignService {@GetMapping("/{userId}")
JsonResult<User> getUser(@PathVariable Integer userId);
// 拼接门路 /{userId}/score?score= 新增积分
@GetMapping("/{userId}/score")
JsonResult addScore(@PathVariable Integer userId, @RequestParam Integer score);
5.3 OrderFeignService
package cn.tedu.sp09.service;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import cn.tedu.sp01.pojo.Order;
import cn.tedu.web.util.JsonResult;
@FeignClient("order-service")
public interface OrderFeignService {@GetMapping("/{orderId}")
JsonResult<Order> getOrder(@PathVariable String orderId);
@GetMapping("/")
JsonResult addOrder();}
5.4 FeignController
package cn.tedu.sp09.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import cn.tedu.sp01.pojo.Item;
import cn.tedu.sp01.pojo.Order;
import cn.tedu.sp01.pojo.User;
import cn.tedu.sp09.service.ItemFeignService;
import cn.tedu.sp09.service.OrderFeignService;
import cn.tedu.sp09.service.UserFeignService;
import cn.tedu.web.util.JsonResult;
@RestController
public class FeignController {
@Autowired
private ItemFeignService itemService;
@Autowired
private UserFeignService userService;
@Autowired
private OrderFeignService orderService;
@GetMapping("/item-service/{orderId}")
public JsonResult<List<Item>> getItems(@PathVariable String orderId) {return itemService.getItems(orderId);
}
@PostMapping("/item-service/decreaseNumber")
public JsonResult decreaseNumber(@RequestBody List<Item> items) {return itemService.decreaseNumber(items);
}
@GetMapping("/user-service/{userId}")
public JsonResult<User> getUser(@PathVariable Integer userId) {return userService.getUser(userId);
}
@GetMapping("/user-service/{userId}/score")
public JsonResult addScore(@PathVariable Integer userId, Integer score) {return userService.addScore(userId, score);
}
@GetMapping("/order-service/{orderId}")
public JsonResult<Order> getOrder(@PathVariable String orderId) {return orderService.getOrder(orderId);
}
@GetMapping("/order-service")
public JsonResult addOrder() {return orderService.addOrder();
}
}
6. 启动服务,并拜访测试
- http://eureka1:2001
- http://localhost:3001/item-service/35
http://localhost:3001/item-service/decreaseNumber
应用 postman,POST 发送以下格局数据:[{"id":1, "name":"abc", "number":23},{"id":2, "name":"def", "number":11}]
- http://localhost:3001/user-service/7
- http://localhost:3001/user-service/7/score?score=100
- http://localhost:3001/order-service/123abc
- http://localhost:3001/order-service/
二、feign + ribbon 负载平衡和重试
- 无需额定配置,feign 默认已启用了 ribbon 负载平衡和重试机制。能够通过配置对参数进行调整
重试的默认配置参数:
ConnectTimeout=1000
ReadTimeout=1000
MaxAutoRetries=0
MaxAutoRetriesNextServer=1
1.application.yml 配置 ribbon 超时和重试
ribbon.xxx
全局配置item-service.ribbon.xxx
对特定服务实例的配置
spring:
application:
name: feign
server:
port: 3001
eureka:
client:
service-url:
defaultZone: http://eureka1:2001/eureka, http://eureka2:2002/eureka
ribbon:
ConnectTimeout: 1000
ReadTimeout: 1000
item-service:
ribbon:
MaxAutoRetries: 1
MaxAutoRetriesNextServer: 2
ConnectTimeout: 1000
ReadTimeout: 500
2. 启动服务,拜访测试
http://localhost:3001/item-service/35
三、feign + hystrix 降级
feign 默认没有启用 hystrix,增加配置,启用 hystrix
1. application.yml 增加配置
feign:
hystrix:
enabled: true
启用 hystrix 后,拜访服务
http://localhost:3001/item-service/35
默认 1 秒会疾速失败,没有降级办法时,会显示白板页
1.1 能够增加配置,临时减小降级超时工夫,以便后续对降级进行测试
feign:
hystrix:
enabled: true
hystrix:
command:
default:
execution:
isolation:
thread:
timeoutInMilliseconds: 500
2. 指定降级类
近程调用失败, 会执行降级类中的代码
2.1 ItemFeignService
@FeignClient(name="item-service", fallback = ItemFeignServiceFB.class)
public interface ItemFeignService {
2.2 UserFeignService
@FeignClient(name="user-service", fallback = UserFeignServiceFB.class)
public interface UserFeignService {
2.3 OrderFeignService
@FeignClient(name="order-service",fallback = OrderFeignServiceFB.class)
public interface OrderFeignService {
2.4 降级类
降级类须要实现近程接口
2.4.1 ItemFeignServiceFB
package cn.tedu.sp09.service;
import java.util.List;
import org.springframework.stereotype.Component;
import cn.tedu.sp01.pojo.Item;
import cn.tedu.web.util.JsonResult;
@Component
public class ItemFeignServiceFB implements ItemFeignService {
@Override
public JsonResult<List<Item>> getItems(String orderId) {return JsonResult.err("无奈获取订单商品列表");
}
@Override
public JsonResult decreaseNumber(List<Item> items) {return JsonResult.err("无奈批改商品库存");
}
}
2.4.2UserFeignServiceFB
package cn.tedu.sp09.service;
import org.springframework.stereotype.Component;
import cn.tedu.sp01.pojo.User;
import cn.tedu.web.util.JsonResult;
@Component
public class UserFeignServiceFB implements UserFeignService {
@Override
public JsonResult<User> getUser(Integer userId) {return JsonResult.err("无奈获取用户信息");
}
@Override
public JsonResult addScore(Integer userId, Integer score) {return JsonResult.err("无奈减少用户积分");
}
}
2.4.3 OrderFeignServiceFB
package cn.tedu.sp09.service;
import org.springframework.stereotype.Component;
import cn.tedu.sp01.pojo.Order;
import cn.tedu.web.util.JsonResult;
@Component
public class OrderFeignServiceFB implements OrderFeignService {
@Override
public JsonResult<Order> getOrder(String orderId) {return JsonResult.err("无奈获取商品订单");
}
@Override
public JsonResult addOrder() {return JsonResult.err("无奈保留订单");
}
}
3. 启动服务,拜访测试
http://localhost:3001/item-service/35
四、feign + hystrix 监控和熔断测试
1.pom.xml 增加 hystrix 起步依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>
2. 主程序增加 @EnableCircuitBreaker
package cn.tedu.sp09;
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.openfeign.EnableFeignClients;
@EnableCircuitBreaker
@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class Sp09FeignApplication {public static void main(String[] args) {SpringApplication.run(Sp09FeignApplication.class, args);
}
}
3. 配置 actuator 依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
4. application.yml 裸露 hystrix.stream
监控端点
management:
endpoints:
web:
exposure:
include: hystrix.stream
5. 启动服务,查看监控端点
http://localhost:3001/actuator
5.1 hystrix dashboard
启动 hystrix dashboard 服务,填入 feign 监控门路,开启监控
拜访 http://localhost:4001/hystrix
- 填入 feign 监控门路:
http://localhost:3001/actuator/hystrix.stream
- 拜访微服务,以产生监控数据
http://localhost:3001/item-service/35
http://localhost:3001/user-service/7
http://localhost:3001/user-service/7/score?score=100
http://localhost:3001/order-service/123abc
http://localhost:3001/order-service/
5.2 熔断测试
- 用 ab 工具,以并发 50 次,来发送 20000 个申请
ab -n 20000 -c 50 http://localhost:3001/item-service/35
- 断路器状态为 Open,所有申请会被短路,间接降级执行 fallback 办法
五、order service 调用商品库存服务和用户服务
批改 sp04-orderservice 我的项目,增加 feign,调用 item service 和 user service
1. 增加依赖
- actuator
- feign
- hystrix
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>cn.tedu</groupId>
<artifactId>sp04-orderservice</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sp04-orderservice</name>
<description>Demo project for Spring Boot</description>
<properties>
<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-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>cn.tedu</groupId>
<artifactId>sp01-commons</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<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-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-openfeign</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
</project>
2. 批改 application.yml 文件
- ribbon 重试和 hystrix 超时这里没有设置,采纳了默认值
spring:
application:
name: order-service
server:
port: 8201
eureka:
client:
service-url:
defaultZone: http://eureka1:2001/eureka, http://eureka2:2002/eureka
feign:
hystrix:
enabled: true
management:
endpoints:
web:
exposure:
include: hystrix.stream
3. 主程序增加 @EnableFeignClients 注解
package cn.tedu.sp04;
import org.springframework.boot.SpringApplication;
import org.springframework.cloud.client.SpringCloudApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;
//@EnableDiscoveryClient
//@SpringBootApplication
@EnableFeignClients
@SpringCloudApplication
public class Sp04OrderserviceApplication {public static void main(String[] args) {SpringApplication.run(Sp04OrderserviceApplication.class, args);
}
}
4. 指定降级类
4.1 ItemFeignService
package cn.tedu.sp04.order.feignclient;
import java.util.List;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import cn.tedu.sp01.pojo.Item;
import cn.tedu.web.util.JsonResult;
@FeignClient(name="item-service", fallback = ItemFeignServiceFB.class)
public interface ItemFeignService {@GetMapping("/{orderId}")
JsonResult<List<Item>> getItems(@PathVariable String orderId);
@PostMapping("/decreaseNumber")
JsonResult decreaseNumber(@RequestBody List<Item> items);
}
4.2 UserFeignService
package cn.tedu.sp04.order.feignclient;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestParam;
import cn.tedu.sp01.pojo.User;
import cn.tedu.web.util.JsonResult;
@FeignClient(name="user-service", fallback = UserFeignServiceFB.class)
public interface UserFeignService {@GetMapping("/{userId}")
JsonResult<User> getUser(@PathVariable Integer userId);
@GetMapping("/{userId}/score")
JsonResult addScore(@PathVariable Integer userId, @RequestParam Integer score);
}
4.3ItemFeignServiceFB
- 获取商品列表的降级办法,模仿应用缓存数据
package cn.tedu.sp04.order.feignclient;
import java.util.Arrays;
import java.util.List;
import org.springframework.stereotype.Component;
import cn.tedu.sp01.pojo.Item;
import cn.tedu.web.util.JsonResult;
@Component
public class ItemFeignServiceFB implements ItemFeignService {
@Override
public JsonResult<List<Item>> getItems(String orderId) {if(Math.random()<0.5) {return JsonResult.ok().data(Arrays.asList(new Item[] {new Item(1,"缓存 aaa",2),
new Item(2,"缓存 bbb",1),
new Item(3,"缓存 ccc",3),
new Item(4,"缓存 ddd",1),
new Item(5,"缓存 eee",5)
})
);
}
return JsonResult.err("无奈获取订单商品列表");
}
@Override
public JsonResult decreaseNumber(List<Item> items) {return JsonResult.err("无奈批改商品库存");
}
}
5. 降级类
5.1 UserFeignServiceFB
- 获取用户信息的降级办法,模仿应用缓存数据
package cn.tedu.sp04.order.feignclient;
import org.springframework.stereotype.Component;
import cn.tedu.sp01.pojo.User;
import cn.tedu.web.util.JsonResult;
@Component
public class UserFeignServiceFB implements UserFeignService {
@Override
public JsonResult<User> getUser(Integer userId) {if(Math.random()<0.4) {return JsonResult.ok(new User(userId, "缓存 name"+userId, "缓存 pwd"+userId));
}
return JsonResult.err("无奈获取用户信息");
}
@Override
public JsonResult addScore(Integer userId, Integer score) {return JsonResult.err("无奈减少用户积分");
}
}
5.2 OrderServiceImpl
package cn.tedu.sp04.order.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import cn.tedu.sp01.pojo.Item;
import cn.tedu.sp01.pojo.Order;
import cn.tedu.sp01.pojo.User;
import cn.tedu.sp01.service.OrderService;
import cn.tedu.sp04.order.feignclient.ItemFeignService;
import cn.tedu.sp04.order.feignclient.UserFeignService;
import cn.tedu.web.util.JsonResult;
import lombok.extern.slf4j.Slf4j;
@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private ItemFeignService itemService;
@Autowired
private UserFeignService userService;
@Override
public Order getOrder(String orderId) {
// 调用 user-service 获取用户信息
JsonResult<User> user = userService.getUser(7);
// 调用 item-service 获取商品信息
JsonResult<List<Item>> items = itemService.getItems(orderId);
Order order = new Order();
order.setId(orderId);
order.setUser(user.getData());
order.setItems(items.getData());
return order;
}
@Override
public void addOrder(Order order) {
// 调用 item-service 缩小商品库存
itemService.decreaseNumber(order.getItems());
//TODO: 调用 user-service 减少用户积分
userService.addScore(7, 100);
log.info("保留订单:"+order);
}
}
6. order-service 配置启动参数, 启动两台服务器
--server.port=8201
--server.port=8202
7. 启动服务,拜访测试
- 依据 orderid,获取订单
http://localhost:8201/123abc
http://localhost:8202/123abc - 保留订单
http://localhost:8201/
http://localhost:8202/
hystrix dashboard 监控 order service 断路器
- 拜访 http://localhost:4001/hystrix,填入 order service 的断路器监控门路,启动监控
- http://localhost:8201/actuator/hystrix.stream
- http://localhost:8202/actuator/hystrix.stream
六、hystrix + turbine 集群聚合监控
hystrix dashboard 一次只能监控一个服务实例,应用 turbine 能够会集监控信息,将聚合后的信息提供给 hystrix dashboard 来集中展现和监控
1. 新建 sp10-turbine 我的项目
2. 增加依赖
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>cn.tedu</groupId>
<artifactId>sp10-turbine</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sp10-turbine</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.RELEASE</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-turbine</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>
</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>
3. 批改 application.yml 文件
spring:
application:
name: turbin
server:
port: 5001
eureka:
client:
service-url:
defaultZone: http://eureka1:2001/eureka, http://eureka2:2002/eureka
turbine:
app-config: order-service
cluster-name-expression: new String("default")`
4. 主程序
增加 @EnableTurbine
和 @EnableDiscoveryClient
注解
package cn.tedu.sp10;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.turbine.EnableTurbine;
@EnableTurbine
@EnableDiscoveryClient
@SpringBootApplication
public class Sp10TurbineApplication {public static void main(String[] args) {SpringApplication.run(Sp10TurbineApplication.class, args);
}
}
5. 拜访测试
- 8201 服务器产生监控数据:
http://localhost:8201/abc123
http://localhost:8201/ - 8202 服务器产生监控数据:
http://localhost:8202/abc123
http://localhost:8202/ - turbine 监控门路
http://localhost:5001/turbine.stream - 在 hystrix dashboard 中填入 turbine 监控门路,开启监控
http://localhost:4001/hystrix - turbine 聚合了 order-service 两台服务器的 hystrix 监控信息