来自Fargate集群上AWS ECS docker容器中运行的Java应用程序的Unk

Scala代码的违规行是：

  private val machineName = InetAddress.getLocalHost().getHostName()

一些初步研究表明错误与容器中/ etc / hosts文件的内容有关.所以我创建了一个小的测试程序,它表现出与我的真实应用程序相同的行为,并且还将/ etc / hosts的内容转储到stdout：

import java.net.*;
import java.io.*;

public class NetworkTest {
   public static void main(String[] args) throws InterruptedException,IOException,FileNotFoundException {
      while(true) {
         networkDump();
         Thread.sleep(10000);
      }
   }

   private static void networkDump() throws IOException,FileNotFoundException {
      System.out.println("/etc/hosts:");
      System.out.println("");

      FileReader f = new FileReader("/etc/hosts");
      BufferedReader reader = new BufferedReader(f);
      String line = null;
      while((line = reader.readLine()) != null) {
         System.out.println(line);
      }
      System.out.println("");

      dumpHostname();
   }

   private static void dumpHostname() {
      try {
         String hostname = InetAddress.getLocalHost().getHostName();
         System.out.printf("Hostname: %snn",hostname);
      } catch(UnknownHostException e) {
         System.out.println(e.getMessage());
      }
   }
}

Dockerfile：

FROM openjdk:8

WORKDIR /site
ADD . /site

CMD ["java","NetworkTest"]

我从AWS获得的输出如下：

/etc/hosts:
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

3a5a4271a6e3: 3a5a4271a6e3: Name or service not known

与在我的本地机器上的docker中运行的输出相比：

> docker run networktest

/etc/hosts:
127.0.0.1   localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.4  82691e2fb948

Hostname: 82691e2fb948

未获得异常的本地版本在/ etc / hosts中具有主机名的条目,而AWS主机文件没有主机名的条目.我已经尝试添加一个/etc/rc.local文件来手动将主机名添加到localhost行的末尾,只需在Dockerfile中添加一个RUN命令来执行相同的操作.两者都没有任何影响.

有没有人知道是否有办法配置图像或ECS任务定义以获得在AWS中正确配置的主机名？