Eureka客户端动态配置未卡死

Question

我目前正在尝试在Docker容器中复制eureka客户端，但没有这样做。基本上所有容器副本都使用相同的IP地址注册。为了解决此问题，我尝试动态配置Eureka Client，但配置不会卡死。

这是我的配置：

application.yml

server:
  port: 8765

spring:
  application:
    name: zuul-gateway

zuul:
  sensitive-headers:
  add-proxy-headers: false

eureka:
  client:
    serviceUrl:
      defaultZone: http://${EUREKA:10.0.2.15:8761}/eureka/
    register-with-eureka: true
    fetch-registry: true
  instance:
    instance-id: ${spring.application.name}:${spring.application.instance_id:${random.value}}
    prefer-ip-address: true

# Increase the Hystrix timeout to 60s (for all)
hystrix:
  command:
    default:
      execution:
        isolation:
          thread:
            timeoutInMilliseconds: 60000

通过设置instance-id，我可以确保eureka可以选择不同的实例，但是不能解决选择相同IP的问题。

EurekaClientConfig.java

@Configuration
public class EurekaClientConfig {

    @Bean
    @Autowired
    @Profile("docker")
    public EurekaInstanceConfigBean eurekaInstanceConfig(final InetUtils inetUtils) throws IOException {
        final String hostName = System.getenv("HOSTNAME");
        System.out.println("HOSTNAME: " + hostName);
        String hostAddress = null;

        final Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
        for (NetworkInterface netInt : Collections.list(networkInterfaces)) {
            for (InetAddress inetAddress : Collections.list(netInt.getInetAddresses())) {
                if (hostName.equals(inetAddress.getHostName())) {
                    hostAddress = inetAddress.getHostAddress();
                    System.out.println("IP ADDRESS: " + hostAddress);
                }

                System.out.printf("%s: %s / %s\n", netInt.getName(),  inetAddress.getHostName(), inetAddress.getHostAddress());
            }
        }

        if (hostAddress == null) {
            throw new UnknownHostException("Cannot find ip address for hostname: " + hostName);
        }

        final EurekaInstanceConfigBean config = new EurekaInstanceConfigBean(inetUtils);
        config.setHostname(hostName);
        config.setIpAddress(hostAddress);
        return config;
    }
}

当我打印主机和IP地址时，我得到了正确的值。但似乎配置没有卡住。

ZuulGatewayApplication.java

@EnableZuulProxy
@EnableDiscoveryClient
@SpringBootApplication
public class ZuulGatewayApplication {

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

    @Bean
    public EurekaClientConfig eurekaClientConfig() {
        return new EurekaClientConfig();
    }

    @Bean
    public TimeTrackerFilter timeTrackerFilter() {
        return new TimeTrackerFilter();
    }

    @Bean
    public InfoRequestFilter infoRequestFilter() {
        return new InfoRequestFilter();
    }

}

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>pt.fabiopina</groupId>
    <artifactId>zuul-gateway</artifactId>
    <version>1.0-SNAPSHOT</version>

    <name>Zuul-Gateway</name>
    <description>Netflix Zuul reverse proxy gateway with metrics collection</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
            <version>1.4.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
            <version>1.4.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.4.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.16</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-commons</artifactId>
            <version>1.3.0.RELEASE</version>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Brixton.SR5</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>
        <finalName>ZuulGateway</finalName>
    </build>

</project>

你们能发现我在做什么错吗？我不知道问题是否可能是依赖关系或我调用Bean的方式。顺便说一句，当我运行它时，我没有遇到任何错误，但是我的目标是使每个容器副本具有不同的IP地址，但是不幸的是，这种情况没有发生。

谢谢！