HA: allow dfsadmin to refer to a particular namenode
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Key: HDFS-2916
URL: https://issues.apache.org/jira/browse/HDFS-2916
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ha
Affects Versions: HA branch (HDFS-1623)
Reporter: Eli Collins
Assignee: Eli Collins
dfsadmin currently fails over like other clients, so if we you want to put a
particular NN in safemode you need to use the "fs" option and specify a
host:ipcport target. Like HDFS-2808 it would be useful to be able to specify a
logical namenode ID instead of an RPC addr. Since fs is part of generic options
this could potentially apply to all tools, however most tools want to refer to
the default logical namenode URI and failover like other clients.
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