SpringCloud of Hystrix-Dashboard monitoring, and step on the pit ...

Others 2019-08-25 15:14:18 views: null

Preface:

Recently the newly recruited staff, the company uses a SpringCloud, before there to find out about SpringCloud, but for a long time not to set up not to use it is easy to forget, so the spare time to re-review the SpringCloud. But before the open version SpringCloud may be a bit low, the company is now using version "Greenwich.RELEASE" of, SpringBoot use the "2.1.x" version is relatively new, so when using Hystrix-Dashboard will be a little pit Therefore I wanted to step on the pit recorded, so that more people away from the pit, ado, started!

First, create Hystrix-Dashboard monitoring services: springcloud-hystrix-dashboard

  1. Engineering pom-dependent
<?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>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gxc.test</groupId>
    <artifactId>springcloud-hystrix-dashboard</artifactId>
    <version>1.0.0</version>

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

    <dependencies>
        <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>Greenwich.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>
  1. yml profile
server:
  port: 10000
spring:
  application:
    name: springcloud-hystrix-dashboard
  1. Add annotations @EnableHystrixDashboard on startup class
@EnableHystrixDashboard
@SpringBootApplication
public class HystrixDashboardApplication {
    public static void main(String[] args) {
        SpringApplication.run(HystrixDashboardApplication.class, args);
    }
}
  1. start up! Access address browser: HTTP: // localhost: 10000 / hystrix , as shown below:
    image.png

Second, create a registry Eureka: springcloud-eureka-server

Some readers may ask: play Hystrix-Dashboard is not to say it? Why have to use Eureka?
A: Please be patient to look down, which is why I say the title of the pit ...

  1. Engineering pom-dependent
<?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>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gxc.test</groupId>
    <artifactId>springcloud-hystrix-dashboard</artifactId>
    <version>1.0.0</version>

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

    <dependencies>
        <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>Greenwich.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>
  1. yml profile
server:
  port: 9000

spring:
  application:
    name: springcloud-eureka-server

eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://127.0.0.1:${server.port}/eureka
  1. Start class add annotations: @EnableEurekaServer
@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}
  1. start up! Browser access: HTTP: // localhost: 9000 / , as shown below:
    image.png

Third, create a monitored service: springcloud-user

  1. Engineering pom-dependent
<?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>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gxc.test</groupId>
    <artifactId>springcloud-user</artifactId>
    <version>1.0.0</version>
    <properties>
        <java.version>1.8</java.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-netflix-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>
  1. yml profile
server:
  port: 10001

spring:
  application:
    name: springcloud-user

# 将服务注册到Eureka注册中心
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:9000/eureka
  instance:
    prefer-ip-address: true
    instance-id: ${spring.application.name}:${server.port}

feign:
  hystrix:
    enabled: true
  1. Add comment startup class
//@EnableCircuitBreaker
//@EnableEurekaClient
//@EnableFeignClients
//@SpringBootApplication

// 以上四个注解可以用如下两个注解取代
@EnableFeignClients
@SpringCloudApplication
public class UserApplication {
    public static void main(String[] args) {
        SpringApplication.run(UserApplication.class, args);
    }
}
  1. Create a test class Controller
@RestController
public class UserController {
    @GetMapping("/user")
    public Object getUser() {
        Map<String, Object> user = Maps.newHashMap();
        user.put("username","GongXincheng");
        user.put("age", 23);
        user.put("birthday", new Date());
        return user;
    }
}
  1. start up! Browser access: HTTP: // localhost: 10001 / the User , as shown below:
    image.png

Fourth, the test Hystrix-Dashboard to monitor user services

  1. Browser access: HTTP: // localhost: 10001 / hystrix.stream , there have been 404
    Description: The first pit, before SpringBoot 2.0, just add the Actuator depend, will not be 404 errors
    image.png
  2. 404 to solve the problem: Create a profile class, and register a Servlet
@Configuration
public class ServletConfigBean {
    @Bean
    public ServletRegistrationBean hystrixMetricsStreamServlet() {
        ServletRegistrationBean regist = new ServletRegistrationBean();
        regist.setServlet(new HystrixMetricsStreamServlet());
        regist.setName("hystrixMetricsStreamServlet");
        regist.setLoadOnStartup(1);
        regist.addUrlMappings("/hystrix.stream");
        return regist;
    }
}
  1. Browser access: HTTP: // localhost: 10001 / hystrix.stream , as shown below:
    image.png

  2. The first step of the link: HTTP: // localhost: 10001 / hystrix.stream , copied to Hystrix-Dashboard page
    image.png

  3. Hystrix-Dashboard will always loading ..., this is the second pit ...
    image.png

  4. Solution:
1：创建另一个服务（例如：springcloud-order）
2：将新的服务（order）注册到Eureka
3：在user服务写一个新的Api接口，通过 Feign 访问新服务（order）的Api接口
4：注意：经过本人测试通过RestTemplate的方式调用，仍然没有效果。
5：当通过Feign调用一次新服务（order）后，hystrix.stream 正常，效果如下：

image.png
image.png

  1. Controller level code
@RestController
public class UserController {

    private static final String ORDER_SERVER_URL = "http://springcloud-order";

    @Resource private OrderFeign orderFeign;
    @Resource private RestTemplate restTemplate;

    @GetMapping("/user")
    public Object getUser() {
        Map<String, Object> user = Maps.newHashMap();
        user.put("username","GongXincheng");
        user.put("age", 23);
        user.put("birthday", new Date());
        return user;
    }

    @GetMapping("/feign/order")
    public Object feignGetOrder() {
        return orderFeign.getOrder();
    }

    @GetMapping("/rest/order")
    public Object restGetOrder() {
        return restTemplate.getForObject(ORDER_SERVER_URL + "/order", Object.class);
    }
}

8: the User Services and oder service directory structure and the relevant code
image.png

Five: Code links

https://gitee.com/gxc6/gxc-springcloud-study

If there is something wrong place, welcome to correct me help! thank!

I have been through this ... to finish the ... 3:00 slipped slipped ...

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Origin www.cnblogs.com/gxc6/p/11407601.html
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