微服务：Spring Cloud应用中的Zuul和Consul

Question

我将尝试使用Zuul和Consul创建一个Spring Cloud微服务应用程序。

我的项目有两个组件：

1. api-gateway 微服务，使用Zuul 2. Hello world 微服务（一个简单的hello world Rest Webservice）

这是api-gateway的代码：

 @SpringBootApplication
 @EnableZuulProxy
 @EnableDiscoveryClient
 public class ZuulApplication {

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

 }

pom.xml文件

<parent>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-parent</artifactId>
    <version>Brixton.M3</version>
</parent>

<properties>
    <java.version>1.8</java.version>
    <spring.cloud.consul.version>1.0.0.M4</spring.cloud.consul.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-commons</artifactId>
    </dependency>

    <dependency>
        <!-- Setup Spring Boot -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <!-- Setup Spring MVC & REST, use Embedded Tomcat -->
        <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>

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

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>

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

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-consul-all</artifactId>
        <version>${spring.cloud.consul.version}</version>
    </dependency>

</dependencies>

application.yml

 zuul:
  routes:
    hello1:
     path: /hello1/**
     serviceId: microservice-example

logging:
  level:
   org.springframework: INFO
   com.netflix: DEBUG

bootstrap.yml

spring:
  application:
    name: edge-server

 cloud:
   consul:
    config:
      enabled: true
      host: localhost
      port: 8500

这是hello微服务的代码：

 @SpringBootApplication
 @EnableConfigServer
 @EnableDiscoveryClient
 @RestController
 public class Application {

 @RequestMapping(value="/hello1",method = RequestMethod.GET)
 public String hello() {
    System.out.print("hello1");
    return "Hello1";
 }
 public static void main(String[] args) {
    new SpringApplicationBuilder(Application.class).web(true).run(args);
 }
}

bootstrap.yml： spring： application： name：微服务示例 profiles： active：本地的

 cloud:
  consul:
   config:
    enabled: true
    host: localhost
    port: 8500

但是，当我启动api-gateway时，我遇到了以下异常：

   Caused by: org.springframework.beans.BeanInstantiationException: Failed     to instantiate [org.springframework.cloud.netflix.zuul.filters.RouteLocator]: Factory method 'routeLocator' threw exception; nested exception is java.lang.IllegalStateException: Unable to locate service in consul agent: edge-server
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
... 69 common frames omitted
 Caused by: java.lang.IllegalStateException: Unable to locate service in consul agent: edge-server
at org.springframework.cloud.consul.discovery.ConsulDiscoveryClient.getLocalServiceInstance(ConsulDiscoveryClient.java:66) ~[spring-cloud-consul-discovery-1.0.0.M4.jar:1.0.0.M4]

- youssef Liouene

---

可能是Zuul和Consul集成问题的重复。 - spencergibb

已经在这里回答了：http://stackoverflow.com/questions/33782873/zuul-and-consul-integration-issue 并且已经在快照中修复。 - spencergibb

你推荐使用哪个版本的spring-cloud-starter-consul？ - youssef Liouene

最新版本是Brixton.M3（1.0.0.M4）的一部分，但它没有那个修复程序，该修复程序仅有几天历史。 - spencergibb

在这个例子中，我使用的是最新版本（1.0.0.M4）。请参考项目的pom文件。 - youssef Liouene

Answer 1

这个问题在Brixton.M3（1.0.0.M5）中已经得到解决。如上所述，这是一个spring-cloud-consul的问题。新版本运行良好。

- madhu pathy