How do I find my hadoop cluster run from docker?

Question

I am trying to do an experiment to test different runtimes of algorithms using Hadoop with 3 nodes and pig installed. I found a docker image (fluddeni/hadoop-pig) that meets these needs and seemingly is running when checked with docker ps , but I can't find it on any of my ports. I am running my code on Windows and when I check where other docker images run (the docker-machine ip) on the port 9000, as indicated in my core-site.xml file I am getting no page found. Any ideas on where to find the master page for hadoop? Let me know if you need any more information!

Resources:

/usr/local/hadoop/etc/hadoop/core-site.xml

  <configuration>
      <property>
          <name>fs.defaultFS</name>
          <value>hdfs://3b85d55c5080:9000</value>
      </property>
  </configuration>

command docker ps

CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS              PORTS                                                                                                                                                               NAMES
3b85d55c5080        fluddeni/hadoop-pig   "/etc/bootstrap.sh -…"   19 hours ago        Up 2 seconds        2122/tcp, 8020/tcp, 8030-8033/tcp, 8040/tcp, 8042/tcp, 8088/tcp, 9000/tcp, 10020/tcp, 19888/tcp, 49707/tcp, 50010/tcp, 50020/tcp, 50070/tcp, 50075/tcp, 50090/tcp   boring_ptolemy

Answer 1

did you expose the port as you expect?

docker run -p 9000:9000 <rest image details>

reference:

Publish or expose port (-p, --expose)

Answer 2

While port forwarding is one problem, another is the fact that that container ID is not consistent. You should use Docker service DNS names

Ideally, using Compose network bridges.

Then you would always refer to hdfs://namenode:9000 , for example