I have a 3-node hadoop and started 3 docker containers. As we all know, the ports served in the docker container can be mapped to the ports of the host. I use -P to map all the ports of the container to the host ports. The command is as follows:

docker run -it -v /Users/yc/hadoop/docker:/test -P -h h1 --name h1 sequenceiq/hadoop-docker /etc/bootstrap.sh -bash

This is the startup script of the master node, mapping a host directory, mapping all container ports to the host, and setting the hostname of the container
When I look at the process

docker ps

The results are as follows: I did the following beautification:

b96b897c6532        sequenceiq/hadoop-docker   "/etc/bootstrap.sh -b"
 24 minutes ago      Up 24 minutes
 0.0.0.0:32797->2122/tcp,
 0.0.0.0:32796->8030/tcp,
 0.0.0.0:32795->8031/tcp,
 0.0.0.0:32794->8032/tcp,
 0.0.0.0:32793->8033/tcp,
 0.0.0.0:32792->8040/tcp,
 0.0.0.0:32791->8042/tcp,
 0.0.0.0:32790->8088/tcp,
 0.0.0.0:32789->19888/tcp,
 0.0.0.0:32788->49707/tcp,
 0.0.0.0:32787->50010/tcp,
 0.0.0.0:32786->50020/tcp,
 0.0.0.0:32785->50070/tcp,
 0.0.0.0:32784->50075/tcp,
 0.0.0.0:32783->50090/tcp
 h1

Our commonly used 50070 and 8088 are mapped out, but 9000 is not. I know 9000 is hdfs, which may not belong to tcp, so how to access it in my host
I want to use IDEA to develop the java program of hadoop. The input and output directories have to be hdfs:ip:9000/ directory. I don’t know how to access the port of docker container.