Question

我已经浏览了Unable to connect to Command Metric Stream for Hystrix Dashboard with Spring Cloud链接，并尝试了几种选择，但目前尚无结果。我正在开发 Spring Cloud Code + Hystrix + Turbine 。

能否让我知道是什么问题？我正在使用Spring Boot v2.0.4.RELEASE。

HystrixDashboardApplication.java

@EnableTurbine
@EnableHystrixDashboard
@SpringBootApplication
public class HystrixDashboardApplication {

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

pom.xml

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </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.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <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-dashboard</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>
        </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>

tollrate-billboard应用程序具有以下代码 TollrateBillboardApplication.java

@EnableCircuitBreaker
@SpringBootApplication
@EnableEurekaClient
public class TollrateBillboardApplication {

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

DashboardController.java

@Controller
public class DashboardController {

    @LoadBalanced
    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder) {
        return builder.build();
    }

    @Autowired
    private RestTemplate restTemplate;

    @HystrixCommand(fallbackMethod = "getTollRateBackup")
    @RequestMapping("/dashboard")
    public String GetTollRate(@RequestParam int stationId, Model m) {

        TollRate tr = restTemplate.getForObject("http://pluralsight-toll-service/tollrate/" + stationId, TollRate.class);
        System.out.println("stationId: " + stationId);
        m.addAttribute("rate", tr.getCurrentRate());
        return "dashboard";
    }

    public String getTollRateBackup(@RequestParam int stationId, Model m) { 
        System.out.println("Fallback operation called");
        m.addAttribute("rate", "1.00");
        return "dashboard";
    }
}

bootstrap.properties

spring.application.name=pluralsight-tollrate-billboard

application.properties

server.port=8082
# eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
eureka.client.register-with-eureka=true
eureka.client.fetch-registry=true

#http://cloud.spring.io/spring-cloud-static/Finchley.RELEASE/single/spring-cloud.html#_environment_changes
management.endpoints.web.exposure.include=hystrix.stream

CURL命令结果：

curl "http://localhost:8085/clusters"

输出

[
    {
        "name": "PLURALSIGHT-FASTPASS-CONSOLE",
        "link": "http://localhost:8085/turbine.stream?cluster=PLURALSIGHT-FASTPASS-CONSOLE"
    },
    {
        "name": "PLURALSIGHT-TOLLRATE-BILLBOARD",
        "link": "http://localhost:8085/turbine.stream?cluster=PLURALSIGHT-TOLLRATE-BILLBOARD"
    }
]

EDIT-1 :: ，我正在使用“ hystrix-turbine”

@EnableTurbineStream
@SpringBootApplication
public class HystrixTurbineApplication {

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

现在，我遇到了以下错误：

2018-09-03 22:23:45.808  WARN 2820 --- [nio-8085-exec-5] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8085/turbine.stream?cluster=PLURALSIGHT-FASTPASS-CONSOLE : 404 : HTTP/1.1 404 
2018-09-03 22:23:45.808  WARN 2820 --- [nio-8085-exec-2] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8085/turbine.stream?cluster=PLURALSIGHT-FASTPASS-CONSOLE : 404 : HTTP/1.1 404

Answer 1

@Sayali我尝试在自己的系统中重新创建该错误，并设法使其正常运行，这是您可以进行的一些检查：

1）您第一个屏幕截图中的URL不正确。您在Hystrix信息中心中的流网址应为：

http://localhost:8085/turbine.stream?cluster=PLURALSIGHT-TOLLRATE-BILLBOARD

该URL应该指向主类中具有@EnableTurbine批注的仪表板应用程序的端口。

2）检查您是否收到以下答复：

http://localhost:8082/actuator/hystrix.stream

（为此使用浏览器）（这应该来自您使用@EnableCircuitBreaker启用了hystrix的应用程序）

如果您收到ping命令，则至少可以访问hystrix流。如果不，检查是否具有：org.springframework.boot:spring-boot-starter-actuator依赖项和
确保在主类中具有@EnableCircuitBreaker的应用程序的application.properties文件中设置了以下属性：

management.endpoints.web.exposure.include= hystrix.stream, info, health

再次检查URL。

3）在转移到涡轮机流之前，请使涡轮机部分工作，因此，到目前为止，您可以进行以下更改：

@EnableTurbine // instead of @EnableTurbineStream
@SpringBootApplication
public class HystrixTurbineApplication {

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

还要使用TurbineStream：

您可能希望Hystrix命令将度量标准推送到Turbine。 Spring Cloud通过消息传递实现了这一点。为此，请在客户端上添加对spring-cloud-netflix-hystrix-stream和您选择的spring-cloud-starter-stream-*。

引用：http://cloud.spring.io/spring-cloud-static/Finchley.SR1/single/spring-cloud.html#_turbine_stream

我希望这会有所帮助。请发表评论以帮助我知道这是否对您有用。

无法连接到Spring Cloud + Hystrix + Turbine中的Command Metric Stream-不是“ text / event-stream”的MIME类型（“ text / plain”）

1 个答案: