title: Native Apache Kafka and Zookeeper with Confluent components?
body: <p>Could you please tell me about compatibility of Apache Kafka and Zookeeper (native Apache distributuins) with some Confluent's components. I have already installed in my environment Kafka and Zookeeper as a multinodes clusters. But now I need to add schema-registry, kafka-connect.</p>
  
  <p>So I actually tried to deploy Confluent Schema registry from their official docker image. I logged in and was able to successfully telnet kafka broker on port 9093</p>
  
  <pre><code>root@schema-0:/usr/bin# telnet kafka-0.kafka-hs 9093
  Trying 10.244.3.47...
  Connected to kafka-0.kafka-hs.log-platform.svc.cluster.local.
  Escape character is '^]'.
  </code></pre>
  
  <p>After I tried to do some tests:</p>
  
  <pre><code># /usr/bin/kafka-avro-console-producer \
    --broker-list localhost:9093 --topic bar \
    --property value.schema='{"type":"record","name":"myrecord","fields" \
    [{"name":"f1","type":"string"}]}'
  </code></pre>
  
  <p>Add some values:</p>
  
  <pre><code>{"f1": "value1"}
  </code></pre>
  
  <p>But no luck :(. Got next errors:</p>
  
  <pre><code>value.serializer = class org.apache.kafka.common.serialization.ByteArraySerializer
   (org.apache.kafka.clients.producer.ProducerConfig)
  
  [2018-01-28 11:23:23,561] INFO Kafka version : 1.0.0-cp1 (org.apache.kafka.common.utils.AppInfoParser)
  
  [2018-01-28 11:23:23,561] INFO Kafka commitId : ec61c5e93da662df (org.apache.kafka.common.utils.AppInfoParser){"f1": "value1"}
  
  [2018-01-28 11:23:36,233] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
  
  [2018-01-28 11:23:36,335] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
  [2018-01-28 11:23:36,486] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
  </code></pre>
  
  <p>Entire system is spinning on Kubernetes</p>