springcloud demo

SpringCloud

1 单体应用

1.1项目结构

1.2配置文件

application.yml

server:
  port: 8080
  servlet:
    context-path: /


spring:
  thymeleaf:
    mode: HTML5
    encoding: utf-8
    servlet:
      content-type: text/html
    cache: false

pom.xml

<?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.tzy</groupId>
    <artifactId>testcloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</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-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.3.1</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
    
</project>

1.3页面

products.html

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>products</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <style>
        table {
            border-collapse: collapse;
            width: 400px;
            margin: 20px auto;
        }

        td, th {
            border: 1px solid gray;
        }
    </style>
</head>
<body>
<div class="workingArea">
    <table>
        <thead>
        <tr>
            <th>id</th>
            <th>产品名称</th>
            <th>价格</th>
        </tr>
        </thead>
        <tbody>
        <tr th:each="p: ${ps}">
            <td th:text="${p.id}"></td>
            <td th:text="${p.name}"></td>
            <td th:text="${p.price}"></td>
        </tr>
        </tbody>
    </table>
</div>
</body>
</html>

1.4类

启动类ProductServiceApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import cn.hutool.core.util.NetUtil;
 
@SpringBootApplication
public class ProductServiceApplication {
    public static void main(String[] args) {
        int port = 8080;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductServiceApplication.class).run(args);
    }
}

实体类Product

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Product {
    private int id;
    private String name;
    private int price;
}

服务类ProductService

import com.tzy.testcloud.pojo.Product;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@Service
public class ProductService {
    public List<Product> listProducts(){
        List<Product> ps = new ArrayList<>();
        ps.add(Product.builder().id(1).name("product a").price(50).build());
        ps.add(Product.builder().id(2).name("product b").price(100).build());
        ps.add(Product.builder().id(3).name("product c").price(150).build());
        return ps;
    }
}

控制类ProductController

import com.tzy.testcloud.pojo.Product;
import com.tzy.testcloud.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
public class ProductController {
  
    @Autowired
    ProductService productService;
     
    @RequestMapping("/products")
    public Object products(Model m) {
        List<Product> ps = productService.listProducts();
        m.addAttribute("ps", ps);
        return "products";
    }
}

1.5启动测试

http://127.0.0.1:8080/products

2 微服务应用问题

2.1分布式和集群周边服务

以上是很简单的分布式结构，围绕这个结构，我们有时候还需要做如下事情：

哪些微服务是如何彼此调用的？ sleuth 服务链路追踪
如何在微服务间共享配置信息？配置服务 Config Server
如何让配置信息在多个微服务之间自动刷新？ RabbitMQ 总线 Bus
如果数据微服务集群都不能使用了，视图微服务如何去处理? 断路器 Hystrix
视图微服务的断路器什么时候开启了？什么时候关闭了？断路器监控 Hystrix Dashboard
如果视图微服务本身是个集群，那么如何进行对他们进行聚合监控？断路器聚合监控 Turbine Hystrix Dashboard
如何不暴露微服务名称，并提供服务？ Zuul 网关

3 Eureka注册中心项目搭建

3.1 项目结构(和上面无关,父子工程)

3.2 配置文件

主---------pom.xml

<?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.tzy</groupId>
    <artifactId>testcloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>eureka-server</module>
    </modules>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>4.3.1</version>
        </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>

</project>

eureka-server---------pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

</project>

eureka-server---------application.yml

server:
  port: 8761
eureka:
  instance:
    hostname: localhost #表示主机名称。
  client:
    registerWithEureka: false   #表示是否注册到服务器。 因为它本身就是服务器，所以就无需把自己注册到服务器了。
    fetchRegistry: false        #表示是否获取服务器的注册信息，和上面同理，这里也设置为 false。
    serviceUrl:                 #自己作为服务器，公布出来的地址。 比如后续某个微服务要把自己注册到 eureka server, 那么就要使用这个地址： http://localhost:8761/eureka/
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
 
spring:
  application:
    name: eureka-server     #表示这个微服务本身的名称是 eureka-server

3.3 类

类eureka-server---------启动类EurekaServerApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
import cn.hutool.core.util.NetUtil;

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args) {
        int port = 8761;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(EurekaServerApplication.class).run(args);
    }
}

3.4启动测试

http://127.0.0.1:8761/

4 服务提供项目搭建

4.1 项目结构

4.2 配置文件

主---------pom.xml

product-data-service---------pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-data-service</artifactId>

    <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-web</artifactId>
        </dependency>
    </dependencies>

</project>

product-data-service---------application.yml

server:
  port: 8001
eureka:
  client:
    serviceUrl:   #设置注册中心的地址： 与 eureka-server 中的配置 application.yml 遥相呼应
      defaultZone: http://localhost:8761/eureka/

spring:
  application:
    name: product-data-service     #表示这个微服务本身的名称是 product-data-service

4.3 类

类product-data-service---------启动类ProductDataServiceApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import cn.hutool.core.util.NetUtil;

@SpringBootApplication
@EnableEurekaClient
public class ProductDataServiceApplication {
    public static void main(String[] args) {
        int port = 8001;
         
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
         
        new SpringApplicationBuilder(ProductDataServiceApplication.class).run(args);
    }
}

类product-data-service---------实体类Product

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Product {
    private int id;
    private String name;
    private int price;
}

类product-data-service---------服务类ProductService

import com.tzy.data.pojo.Product;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@Service
public class ProductService {
    @Value("${server.port}")
    String port;

    public List<Product> listProducts() {
        List<Product> ps = new ArrayList<>();
        ps.add(Product.builder().id(1).name("product a " + port + ":").price(50).build());
        ps.add(Product.builder().id(2).name("product b " + port + ":").price(100).build());
        ps.add(Product.builder().id(3).name("product c " + port + ":").price(150).build());
        return ps;
    }
}

类product-data-service---------控制类ProductController

import java.util.List;

import com.tzy.data.pojo.Product;
import com.tzy.data.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 

@RestController
public class ProductController {
  
    @Autowired
    ProductService productService;
     
    @RequestMapping("/products")
    public Object products() {
        List<Product> ps = productService.listProducts();
        return ps;
    }
}

4.4启动测试

eureka-server启动

product-data-service:8001启动

product-data-service:8002启动

http://127.0.0.1:8761/

http://localhost:8001/products

http://localhost:8002/products

5 服务调用项目搭建(Ribbon)

接下来访问前面注册好的数据微服务了。

springcloud 提供了两种方式，一种是 Ribbon，一种是 Feign。

Ribbon 是使用 restTemplate 进行调用，并进行客户端负载均衡。

什么是客户端负载均衡呢？在前面服务注册里，注册了8001和8002两个微服务， Ribbon 会从注册中心获知这个信息，然后由 Ribbon 这个客户端自己决定是调用哪个，这个就叫做客户端负载均衡。

Feign 是什么呢？ Feign 是对 Ribbon的封装，调用起来更简单。

5.1 项目结构

5.2 配置文件

主---------pom.xml

product-view-service-ribbon---------pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-view-service-ribbon</artifactId>

    <dependencies>
        <!--eureka客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--mvc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--thymeleaf-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

    </dependencies>
</project>

product-view-service-ribbon---------pom.xml

server:
  port: 8010
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
spring:
  application:
    name: product-view-service-ribbon
  thymeleaf:
    cache: false
    prefix: classpath:/templates/
    suffix: .html
    encoding: UTF-8
    mode: HTML5
    servlet:
      content-type: text/html

5.3页面

product-view-service-ribbon---------products.html

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>products</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <style>
        table {
            border-collapse: collapse;
            width: 400px;
            margin: 20px auto;
        }

        td, th {
            border: 1px solid gray;
        }
    </style>
</head>
<body>
<div class="workingArea">
    <table>
        <thead>
        <tr>
            <th>id</th>
            <th>产品名称</th>
            <th>价格</th>
        </tr>
        </thead>
        <tbody>
        <tr th:each="p: ${ps}">
            <td th:text="${p.id}"></td>
            <td th:text="${p.name}"></td>
            <td th:text="${p.price}"></td>
        </tr>
        </tbody>
    </table>
</div>
</body>
</html>

5.4 类

类product-view-service-ribbon---------启动类ProductViewServiceRibbonApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
 
import cn.hutool.core.util.NetUtil;

@SpringBootApplication
@EnableEurekaClient
//@EnableDiscoveryClient表示用于发现eureka 注册中心的微服务。
@EnableDiscoveryClient
public class ProductViewServiceRibbonApplication {
 
    public static void main(String[] args) {
        int port = 8010;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductViewServiceRibbonApplication.class).run(args);
 
    }
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
     
}

类product-view-service-ribbon---------实体类Product

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Product {
    private int id;
    private String name;
    private int price;
}

类product-view-service-ribbon---------客户端类ProductClientRibbon

import java.util.List;

import com.tzy.testribbon.pojo.Product;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
 

@Component
public class ProductClientRibbon {
 
    @Autowired
    RestTemplate restTemplate;

    /**
     *  通过 restTemplate 访问 http://PRODUCT-DATA-SERVICE/products ，
     *  而 product-data-service 既不是域名也不是ip地址，而是 数据服务在 eureka 注册中心的名称。
     */
    public List<Product> listProdcuts() {
        return restTemplate.getForObject("http://PRODUCT-DATA-SERVICE/products",List.class);
    }
 
}

类product-view-service-ribbon---------服务类ProductService

import java.util.List;

import com.tzy.testribbon.client.ProductClientRibbon;
import com.tzy.testribbon.pojo.Product;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 

@Service
public class ProductService {
    @Autowired
    ProductClientRibbon productClientRibbon;
    public List<Product> listProducts(){
        return productClientRibbon.listProdcuts();
    }
}

类product-view-service-ribbon---------控制类ProductController

import java.util.List;

import com.tzy.testribbon.pojo.Product;
import com.tzy.testribbon.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
 

@Controller
public class ProductController {
  
    @Autowired
    ProductService productService;
     
    @RequestMapping("/products")
    public Object products(Model m) {
        List<Product> ps = productService.listProducts();
        m.addAttribute("ps", ps);
        return "products";
    }
}

5.5启动测试

eureka-server启动

product-data-service:8001启动

product-data-service:8002启动

product-view-service-ribbon启动

http://127.0.0.1:8761/

http://localhost:8001/products

http://localhost:8002/products

http://127.0.0.1:8010/products

调用视图

首先数据微服务(product-data-service)和视图微服务(product-view-service-ribbon)都被 eureka (eureka-server)管理起来了。
数据服务(product-view-service-ribbon)是由两个实例的集群组成的，端口分别是 8001 ， 8002
视图微服务(product-view-service-ribbon)通过注册中心调用微服务，然后负载均衡到 8001 或者 8002 端口的应用上。

6 提取API服务

6.1 项目结构

6.2 配置文件

主---------pom.xml

product-api---------pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <packaging>jar</packaging>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-api</artifactId>
    
</project>

6.3 类

类product-api---------实体类Product

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Product {
    private int id;
    private String name;
    private int price;
}

6.4删除其他工程的实体类

6.5对于删除了实体类的工程添加pom依赖

        <dependency>
            <groupId>com.tzy</groupId>
            <artifactId>product-api</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

7 服务调用项目搭建(Feign)

Feign 是什么呢？ Feign 是对 Ribbon的封装，使用注解的方式，调用起来更简单。。。也是主流的方式~

7.1 项目结构

7.2 配置文件

主---------pom.xml

product-service-view-feign---------pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>product-service-view-feign</artifactId>

    <dependencies>
        <!--api-->
        <dependency>
            <groupId>com.tzy</groupId>
            <artifactId>product-api</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <!--eureka-client-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!--feign-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--mvc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--thymeleaf-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>

</project>

product-service-view-feign---------application.yml

server:
  port: 8020
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
spring:
  application:
    name: product-service-view-feign
  thymeleaf:
    cache: false
    prefix: classpath:/templates/
    suffix: .html
    encoding: UTF-8
    mode: HTML5
    servlet:
      content-type: text/html

7.3页面

类product-service-view-feign---------products.html

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>products</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <style>
        table {
            border-collapse: collapse;
            width: 400px;
            margin: 20px auto;
        }

        td, th {
            border: 1px solid gray;
        }
    </style>
</head>
<body>
<div class="workingArea">
    <table>
        <thead>
        <tr>
            <th>id</th>
            <th>产品名称</th>
            <th>价格</th>
        </tr>
        </thead>
        <tbody>
        <tr th:each="p: ${ps}">
            <td th:text="${p.id}"></td>
            <td th:text="${p.name}"></td>
            <td th:text="${p.price}"></td>
        </tr>
        </tbody>
    </table>
</div>
</body>
</html>

7.4 类

类product-service-view-feign---------启动类ProductViewServiceFeignApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import cn.hutool.core.util.NetUtil;

@SpringBootApplication
@EnableEurekaClient
//@EnableDiscoveryClient表示用于发现eureka 注册中心的微服务。
@EnableDiscoveryClient
//@EnableFeignClients表示自己为Feign客户端
@EnableFeignClients
public class ProductViewServiceFeignApplication {
 
    public static void main(String[] args) {
        int port = 8020;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductViewServiceFeignApplication.class).properties("server.port=" + port).run(args);
 
    }
}

类product-service-view-feign---------客户端类ProductClientFeign

import com.tzy.data.pojo.Product;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;

@Component
@FeignClient(value = "PRODUCT-DATA-SERVICE")
public interface ProductClientFeign {
 
    @GetMapping("/products")
    public List<Product> listProdcuts();
}

类product-service-view-feign---------服务类ProductService

import com.tzy.data.pojo.Product;
import com.tzy.testfeign.client.ProductClientFeign;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 

@Service
public class ProductService {
    @Autowired
    ProductClientFeign productClientFeign;
    public List<Product> listProducts(){
        return productClientFeign.listProdcuts();
 
    }
}

类product-service-view-feign---------控制类ProductController

import java.util.List;

import com.tzy.data.pojo.Product;
import com.tzy.testfeign.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
 

@Controller
public class ProductController {
  
    @Autowired
    ProductService productService;
     
    @RequestMapping("/products")
    public Object products(Model m) {
        List<Product> ps = productService.listProducts();
        m.addAttribute("ps", ps);
        return "products";
    }
}

7.5启动测试

eureka-server启动

product-data-service:8001启动

product-data-service:8002启动

product-view-service-ribbon启动

http://127.0.0.1:8761/

http://localhost:8001/products

http://localhost:8002/products

http://127.0.0.1:8020/products

8 服务链路

在前面的例子里，我们有两个微服务，分别是数据服务和视图服务，随着业务的增加，就会有越来越多的微服务存在，他们之间也会有更加复杂的调用关系。
这个调用关系，仅仅通过观察代码，会越来越难以识别，所以就需要通过 zipkin 服务链路追踪服务器这个东西来用图片进行识别了。

8.1 下载zipkin-server-2.10.1-exec.jar

https://download.csdn.net/download/tzy70416450/11241753

8.2添加需要监控的微服务依赖和配置

eureka-server（不需要加）
product-api(不需要加)
product-view-service-ribbon(不用了)
product-data-service
product-service-view-feign

1-----pom.xml添加依赖

<!--zipkin-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>

2-----application.yml添加配置

spring:
  zipkin:
    base-url: http://localhost:9411

3-----添加持续抽样

在启动类里配置 Sampler 抽样策略： ALWAYS_SAMPLE 表示持续抽样

@Bean
public Sampler defaultSampler() {
	return Sampler.ALWAYS_SAMPLE;
}

8.3启动测试

启动zipkin

java -jar zipkin-server-2.10.1-exec.jar

eureka-server启动

product-data-service:8001启动

product-data-service:8002启动

product-view-service-ribbon启动

调用2次接口http://127.0.0.1:8020/products
监控网http://localhost:9411/zipkin/dependency

9 配置服务器(Service)

9.1首先准备git

9.2 项目结构

9.3 配置文件

主---------pom.xml

config-server---------pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>config-server</artifactId>

    <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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>

    </dependencies>
</project>

config-server---------application.yml

server:
  port: 8030
eureka:
  client:
    serviceUrl:   #设置注册中心的地址： 与 eureka-server 中的配置 application.yml 遥相呼应
      defaultZone: http://localhost:8761/eureka/

spring:
  application:
    name: config-server     #表示这个微服务本身的名称是 product-data-service
  cloud:
    config:
      label: master         #表示git的master分支
      server:
        git:
          uri: https://github.com/70416450/cloud-config
          searchPaths: conf       #目录结构

9.4 类

类config-server---------启动类ConfigServerApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 
import cn.hutool.core.util.NetUtil;
 
@SpringBootApplication
@EnableEurekaClient
//@EnableConfigServer 配置服务。
@EnableConfigServer
//@EnableDiscoveryClient表示用于发现eureka 注册中心的微服务。
@EnableDiscoveryClient
public class ConfigServerApplication {
    public static void main(String[] args) {
        int port = 8030;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ConfigServerApplication.class).run(args);
     
    }
}

9.5启动测试

eureka-server启动

config-server启动

http://localhost:8030/product-service-view-feign.yml

http://localhost:8030/product-service-view-feign-dev.yml

http://localhost:8030/product-service-view-feign-test.yml

10 配置客户端(Client)

10.1改造product-service-view-feign

pom.xml增加

        <!--config-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

增加bootstrap.yml

bootstrap.yml 优先级别比application.yml高，所以有这个文件的情况下，优先访问这个文件
bootstrap.yml)

spring:
  cloud:
    config:
      label: master
      profile: dev    #本次访问的配置项dev or test
      discovery:
        enabled: true
        serviceId: config-server

修改application.yml

spring:
  application:
    name: product-service-view-feign

修改ProductController

import java.util.List;

import com.tzy.data.pojo.Product;
import com.tzy.testfeign.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
 

@Controller
@RefreshScope
public class ProductController {
  
    @Autowired
    ProductService productService;

    @Value("${version}")
    String version;

    @RequestMapping("/products")
    public Object products(Model m) {
        List<Product> ps = productService.listProducts();
        m.addAttribute("version", version);
        m.addAttribute("ps", ps);
        return "products";
    }
}

修改products.html增加版本显示

        <tr>
            <td align="center" colspan="3">
                <p th:text="${version}" >springcloud version unknown</p>
            </td>
        </tr>

10.2启动测试

启动 EurekaServerApplication

启动ConfigServerApplication

启动ProductDataServiceApplication

启动ProductViewServiceFeignApplication
http://localhost:8020/products

到此已经可以读取服务器端配置信息，但是修改git上的配置文件，必须重启服务才可以看到信息改变。

11 消息总线BUS

springCloud 通过 rabbitMQ 来进行消息广播，以达到有配置信息发生改变的时候，广播给多个微服务的效果。
所以需要先安装 rabbitMQ 服务器。

[https://github.com/70416450/springcloud-demo/tree/master/document/erl and mq](https://github.com/70416450/springcloud-demo/tree/master/document/erl and mq)

11.1改造product-service-view-feign

pom.xml

        <!--执行器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--mq-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>

bootstrap.yml(增加bus和mq配置)

spring:
  cloud:
    config:
      label: master
      profile: dev    #本次访问的配置项
      discovery:
        enabled: true
        serviceId: config-server
    bus:
      enabled: true
      trace:
        enabled: true
rabbitmq:
  host: localhost
  port: 5672
  username: guest
  password: guest

application.yml路径访问允许

spring:
  application:
    name: product-service-view-feign
management:
  endpoints:
    web:
      exposure:
        include: "*"
      cors:
        allowed-origins: "*"
        allowed-methods: "*"

启动类ProductServiceViewFeignApplication增加mq端口检测

import brave.sampler.Sampler;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import cn.hutool.core.util.NetUtil;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
@EnableEurekaClient
//@EnableDiscoveryClient表示用于发现eureka 注册中心的微服务。
@EnableDiscoveryClient
//@EnableFeignClients表示自己为Feign客户端
@EnableFeignClients
public class ProductServiceViewFeignApplication {
 
    public static void main(String[] args) {
        //判断 rabiitMQ 是否启动
        int rabbitMQPort = 5672;
        if(NetUtil.isUsableLocalPort(rabbitMQPort)) {
            System.err.printf("未在端口%d 发现 rabbitMQ服务，请检查rabbitMQ 是否启动", rabbitMQPort );
            System.exit(1);
        }
        
        int port = 8020;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductServiceViewFeignApplication.class).run(args);
 
    }
    @Bean
    public Sampler defaultSampler() {
        return Sampler.ALWAYS_SAMPLE;
    }
}

新增FreshConfigUtil 用于访问路径：/actuator/bus-refresh

import java.util.HashMap;
 
import cn.hutool.http.HttpUtil;
 
public class FreshConfigUtil {
 
    public static void main(String[] args) {
        HashMap<String,String> headers =new HashMap<>();
        headers.put("Content-Type", "application/json; charset=utf-8");
        System.out.println("因为要去git获取，还要刷新config-server, 会比较卡，所以一般会要好几秒才能完成，请耐心等待");
 
        String result = HttpUtil.createPost("http://localhost:8020/actuator/bus-refresh").addHeaders(headers).execute().body();
        System.out.println("result:"+result);
        System.out.println("refresh 完成");
    }
}

11.2对服务链路追踪的影响

因为视图服务进行了改造，支持了 rabbitMQ, 那么在默认情况下，它的信息就不会进入 Zipkin了。在Zipkin 里看不到视图服务的资料了。

为了解决这个问题，在启动 Zipkin 的时候带一个参数就好了：

java -jar zipkin-server-2.10.1-exec.jar --zipkin.collector.rabbitmq.addresses=localhost

11.3启动测试

启动 EurekaServerApplication

启动ConfigServerApplication

启动ProductDataServiceApplication

启动ProductViewServiceFeignApplication
http://localhost:8020/products

运行FreshConfigUtil ，再次访问

http://localhost:8020/products

12 断路器 HYSTRIX

所谓的断路器，就是当被访问的微服务无法使用的时候，当前服务能够感知这个现象，并且提供一个备用的方案出来。

12.1改造product-view-service-feign

pom.xml

        <!--hystrix断路器-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>

新建Feign客户端接口实现类ProductClientFeignHystrix

import java.util.ArrayList;
import java.util.List;

import com.tzy.data.pojo.Product;
import org.springframework.stereotype.Component;

@Component
public class ProductClientFeignHystrix implements ProductClientFeign{
    public List<Product> listProdcuts(){
        List<Product> result = new ArrayList<>();
        result.add(new Product(0,"产品数据微服务不可用",0));
        return result;
    }
}

application.yml增加Hystrix配置

spring:
  application:
    name: product-service-view-feign
feign.hystrix.enabled: true
management:
  endpoints:
    web:
      exposure:
        include: "*"
      cors:
        allowed-origins: "*"
        allowed-methods: "*"

修改Feign客户端接口ProductClientFeign

import com.tzy.data.pojo.Product;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;

@Component
//@FeignClient(value = "PRODUCT-DATA-SERVICE")
@FeignClient(value = "PRODUCT-DATA-SERVICE",fallback = ProductClientFeignHystrix.class)
public interface ProductClientFeign {
 
    @GetMapping("/products")
    public List<Product> listProdcuts();
}

12.2启动测试

启动 EurekaServerApplication

启动ConfigServerApplication

启动ProductDataServiceApplication

启动ProductViewServiceFeignApplication

http://localhost:8020/products

断开ProductDataServiceApplication

http://localhost:8020/products

13 断路器监控Dashboard(豪猪)

13.1改造product-view-service-feign启动类

增加 @EnableCircuitBreaker以使得它可以把信息共享给监控中心。

13.2 项目结构

13.3 配置文件

pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>hystrix-dashboard</artifactId>
    <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-web</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>

</project>

application.yml

server:
  port: 8040
spring:
  application:
    name: hystrix-dashboard

13.4 类

启动类ProductServiceHystrixDashboardApplication

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
 
import cn.hutool.core.util.NetUtil;
 
@SpringBootApplication
//@EnableHystrixDashboard监控
@EnableHystrixDashboard
public class ProductServiceHystrixDashboardApplication {
    public static void main(String[] args) {
        int port = 8040;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductServiceHystrixDashboardApplication.class).properties("server.port=" + port).run(args);
    }
}

AccessViewService用于不停的访问服务，这样可以看到监控效果

import cn.hutool.core.thread.ThreadUtil;
import cn.hutool.http.HttpUtil;

/**
 * 用于不停的访问服务，这样可以看到监控效果
 */
public class AccessViewService {
    public static void main(String[] args) {
        while(true) {
            ThreadUtil.sleep(1000);
            try {
                String html= HttpUtil.get("http://127.0.0.1:8020/products");
                System.out.println("html length:" + html.length());
            }
            catch(Exception e) {
                System.err.println(e.getMessage());
            }
        }
    }
}

13.5启动测试

启动 EurekaServerApplication

启动ConfigServerApplication

启动ProductDataServiceApplication

启动ProductServiceViewFeignApplication

启动ProductServiceHystrixDashboardApplication

运行AccessViewService 来周期性地访问 http://127.0.0.1:8020/products。因为只有访问了，监控里才能看到数据。

打开监控地址http://localhost:8040/hystrix

在最上面输入http://localhost:8020/actuator/hystrix.stream

此时关闭数据服务ProductDataServiceApplication，再观察，不一会儿红色的数据就达到 100%啦

14 断路器聚合监控

上述13是断路器监控，但是微服务通常会是多个实例组成的一个集群。倘若集群里的实例比较多，难道要挨个挨个去监控这些实例吗？何况有时候，根据集群的需要，会动态增加或者减少实例，监控起来就更麻烦了。
所以为了方便监控集群里的多个实例，springCloud 提供了一个 turbine 项目，它的作用是把一个集群里的多个实例汇聚在一个 turbine里，这个然后再在断路器监控里查看这个 turbine, 这样就能够在集群层面进行监控啦。

14.1改造hystrix-dashboard访问类

import cn.hutool.core.thread.ThreadUtil;
import cn.hutool.http.HttpUtil;

/**
 * 用于不停的访问服务，这样可以看到监控效果
 */
public class AccessViewService {

    public static void main(String[] args) {

        while(true) {
            ThreadUtil.sleep(1000);
            access(8020);
            access(8021);
        }

    }

    public static void access(int port) {
        try {
            String html= HttpUtil.get(String.format("http://127.0.0.1:%d/products",port));
            System.out.printf("%d 地址的视图服务访问成功，返回大小是 %d%n" ,port, html.length());
        }
        catch(Exception e) {
            System.err.printf("%d 地址的视图服务无法访问%n",port);
        }
    }
}

14.2 项目结构

14.3 配置文件

pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>turbine</artifactId>

    <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-web</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>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-turbine</artifactId>
        </dependency>

    </dependencies>
</project>

application.yml

server:
  port: 8050
spring:
  application.name: turbine
turbine:
  aggregator:
    clusterConfig: default
  appConfig: product-view-service-feign  # 配置Eureka中的serviceId列表，表明监控哪些服务
  clusterNameExpression: new String("default")
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

14.4类

启动类ProductServiceTurbineApplication

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.turbine.EnableTurbine;
 
import cn.hutool.core.util.NetUtil;
 
@SpringBootApplication
@EnableTurbine
@EnableAutoConfiguration(exclude = {
org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration.class
})
public class ProductServiceTurbineApplication {
    public static void main(String[] args) {
        int port = 8050;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductServiceTurbineApplication.class).run(args);
    }
}

14.5启动测试

启动 EurekaServerApplication

启动ConfigServerApplication

启动ProductDataServiceApplication

启动ProductServiceViewFeignApplication:8020

启动ProductServiceViewFeignApplication:8021

启动ProductServiceHystrixDashboardApplication

启动ProductServiceTurbineApplication

运行AccessViewService 来周期性地访问 http://127.0.0.1:8020/products,

http://127.0.0.1:8021/products 因为只有访问了，监控里才能看到数据。

打开监控地址http://localhost:8040/hystrix

输入http://localhost:8020/actuator/hystrix.stream

输入http://localhost:8021/actuator/hystrix.stream

输入http://localhost:8050/turbine.stream

15 网关 ZUUL

15.1 项目结构

15.2 配置文件

pom.xml

<?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>testcloud</artifactId>
        <groupId>com.tzy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>zuul</artifactId>
    <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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
    </dependencies>

</project>

application.yml

server:
  port: 8060
zuul:
  routes:
    api-a:
      path: /api-data/**
      serviceId: PRODUCT-DATA-SERVICE
    api-b:
      path: /api-view/**
      serviceId: PRODUCT-VIEW-SERVICE-FEIGN

15.3 类

启动类ProductServiceZuulApplication

import cn.hutool.core.util.NetUtil;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
@EnableDiscoveryClient
public class ProductServiceZuulApplication {
    public static void main(String[] args) {
        int port = 8060;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductServiceZuulApplication.class).run(args);
 
    }
}

15.4 启动测试

启动 EurekaServerApplication

启动ConfigServerApplication

启动ProductDataServiceApplication

启动ProductViewServiceFeignApplication

启动 ProductServiceZuulApplication

http://localhost:8060/api-data/products

http://localhost:8060/api-view/products

这样就可以访问数据微服务和视微服务集群了，并且无需去记住那么多ip地址和端口号了。

参考how2j

posted on 2019-06-18 13:00 咘雷扎克阅读(210) 评论(0) 编辑收藏举报

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代码如戏～我为导演

springcloud demo

SpringCloud

1 单体应用

1.1项目结构

1.2配置文件

1.3页面

1.4类

1.5启动测试

2 微服务应用问题

2.1分布式和集群周边服务

3 Eureka注册中心项目搭建

3.1 项目结构(和上面无关,父子工程)

3.2 配置文件

3.3 类

3.4启动测试

4 服务提供项目搭建

4.1 项目结构

4.2 配置文件

4.3 类

4.4启动测试

5 服务调用项目搭建(Ribbon)

5.1 项目结构

5.2 配置文件

5.3页面

5.4 类

5.5启动测试

6 提取API服务

6.1 项目结构

6.2 配置文件

6.3 类

6.4删除其他工程的实体类

6.5对于删除了实体类的工程添加pom依赖

7 服务调用项目搭建(Feign)

7.1 项目结构

7.2 配置文件

7.3页面

7.4 类

7.5启动测试

8 服务链路

8.1 下载zipkin-server-2.10.1-exec.jar

8.2添加需要监控的微服务依赖和配置

8.3启动测试

9 配置服务器(Service)

9.1首先准备git

9.2 项目结构

9.3 配置文件

9.4 类

9.5启动测试

10 配置客户端(Client)

10.1改造product-service-view-feign

10.2启动测试

11 消息总线BUS

11.1改造product-service-view-feign

11.2对服务链路追踪的影响

11.3启动测试

12 断路器 HYSTRIX

12.1改造product-view-service-feign

12.2启动测试

13 断路器监控Dashboard(豪猪)

13.1改造product-view-service-feign启动类

13.2 项目结构

13.3 配置文件

13.4 类

13.5启动测试

14 断路器聚合监控

14.1改造hystrix-dashboard访问类

14.2 项目结构

14.3 配置文件

14.4类

14.5启动测试

15 网关 ZUUL

15.1 项目结构

15.2 配置文件

15.3 类

15.4 启动测试

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