Docker云服务发现两个容器

在DockerCloud中，我试图让我的容器和另一个容器对话。 我相信问题是主机名不解决（这是在/conf.d/kafka.yaml下面显示）。

为了让DockerCloud拥有两个容器的通信，我尝试了很多变体，包括完整的主机名kafka-development-1和kafka-development-1.kafka等。

我一直得到的错误是在datadog代理信息 ：

在容器中运行./etc/init.d/datadog-agent info并接收：

 kafka ----- - instance #kafka-kafka-development-9092 [ERROR]: 'Cannot connect to instance kafka-development:9092 java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: \n\tjava.net.SocketException: Connection reset]' collected 0 metrics - Collected 0 metrics, 0 events & 0 service checks 

我采取的步骤细节

SSH到Docker节点：

 $ docker ps CONTAINER | PORTS datadog-agent-kafka-development-1.2fb73f62 | 8125/udp, 9001/tcp kafka-development-1.3dc7c2d0 | 0.0.0.0:9092->9092/tcp 

我login容器来查看它们的值，这是datadog-agent ：

 $ docker exec -it datadog-agent-kafka-development-1.2fb73f62 /bin/bash $ > echo $DOCKERCLOUD_CONTAINER_HOSTNAME datadog-agent-kafka-development-1 $ > tail /etc/hosts 172.17.0.7 datadog-agent-kafka-development-1 10.7.0.151 datadog-agent-kafka-development-1 

这是卡夫卡容器 ：

 $ docker exec -it kafka-development-1.3dc7c2d0 /bin/bash $ > echo $DOCKERCLOUD_CONTAINER_HOSTNAME kafka-development-1 $ > tail /etc/hosts 172.17.0.6 kafka-development-1 10.7.0.8 kafka-development-1 $ > echo $KAFKA_ADVERTISED_HOST_NAME kafka-development.c23d1d00.svc.dockerapp.io $ > echo $KAFKA_ADVERTISED_PORT 9092 $ > echo $KAFKA_ZOOKEEPER_CONNECT zookeeper-development:2181 

Datadog conf.d / kafka.yaml ：

  instances: - host: kafka-development port: 9092 # This is the JMX port on which Kafka exposes its metrics (usually 9999) tags: kafka: broker env: development # ... Defaults Below 

任何人都可以看到我做错了什么？