java - docker 容器中的 Eureka 客户端

Question

我有一个 eureka 服务器和两个在 docker 容器中运行的 rest 服务(eureka 客户端)。如果第一个服务尝试访问第二个服务，我会收到 UnknownHostException。原因是服务在 eureka 服务器上注册了 dns 服务器无法解析的容器主机名。

我认为解决方案可能是为 docker 容器设置主机名。所以我使用带有 -h 标志的 docker 来设置主机名:docker run -h project-dev.net9.mycompany.com

但现在服务甚至无法在 eureka 服务器上注册。我得到了这个异常(exception):

 2015-11-30 12:03:42.182 ERROR 1 --- [pool-2-thread-1]    com.netflix.discovery.DiscoveryClient    : Can't get a response from http://project-dev.net9.mycompany.com:8761/eureka/apps/MY-SERVICE/project-dev.net9.mycompany.com
     Can't contact any eureka nodes - possibly a security group issue?

 com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:184)
    at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:120)
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:28)
    at com.sun.jersey.api.client.Client.handle(Client.java:648)
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:680)
    at com.sun.jersey.api.client.WebResource.put(WebResource.java:211)
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1097)
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1060)
    at com.netflix.discovery.DiscoveryClient.access$500(DiscoveryClient.java:105)
    at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1583)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
    Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)
    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:115)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:170)
    ... 14 common frames omitted

2015-11-30 12:03:42.182 ERROR 1 --- [pool-2-thread-1] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MY-SERVICE/project-dev.net9.mycompany.com - was unable to send heartbeat!

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:184)
    at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:120)
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:28)
    at com.sun.jersey.api.client.Client.handle(Client.java:648)
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:680)
    at com.sun.jersey.api.client.WebResource.put(WebResource.java:211)
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1097)
    at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1060)
    at com.netflix.discovery.DiscoveryClient.access$500(DiscoveryClient.java:105)
    at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1583)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)
    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:115)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:170)
    ... 14 common frames omitted

域 project-dev.net9.mycompany.com 可以在我们的网络中访问，我可以 ping 它。

我还可以访问 http://project-dev.net9.mycompany.com:8761/ 下的 eureka 仪表板.所以eureka服务器运行正常。

我很感激任何提示。

Answer 1

您是否尝试过将 eureka.instance.prefer-ip-address 设置为 true？客户端将使用其 IP 地址而不是其主机名注册自己。

这里的每个建议:Question with no answers, but issue solved in the comments