Any command to get active namenode for nameservice in hadoop?

Question

The command:

hdfs haadmin -getServiceState machine-98

Works only if you know the machine name. Is there any command like:

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Answer 1

I found the below when i simply typed 'hdfs' and found a couple of helpful commands, which could be useful for someone who could maybe come here seeking for help.

hdfs getconf -namenodes

This above command will give you the service id of the namenode. Say, hn1.hadoop.com

hdfs getconf -secondaryNameNodes

This above command will give you the service id of the available secondary namenodes. Say , hn2.hadoop.com

hdfs getconf -backupNodes

This above command will get you the service id of backup nodes, if any.

hdfs getconf -nnRpcAddresses

This above command will give you info of name service id along with rpc port number. Say, hn1.hadoop.com:8020

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