Allow GetConf tool to print arbitrary keys
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Key: HDFS-3226
URL: https://issues.apache.org/jira/browse/HDFS-3226
Project: Hadoop HDFS
Issue Type: Improvement
Components: tools
Affects Versions: 2.0.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Currently the "hdfs getconf" tool can only print out certain keys, like the
list of NNs, etc. It would be handy to allow it to fetch an arbitrary
configuration. For example, users may wish to write shell scripts that interact
with their hadoop cluster, and it is useful to be able to fetch configs like
the name of the superuser, or the state of whether HA is enabled.
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