HA: use substitution token for fencing argument
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Key: HADOOP-8007
URL: https://issues.apache.org/jira/browse/HADOOP-8007
Project: Hadoop Common
Issue Type: Sub-task
Components: ha
Affects Versions: HA Branch (HDFS-1623)
Reporter: Eli Collins
Assignee: Eli Collins
Per HADOOP-7983 currently the fencer always passes the target host:port to
fence as the first argument to the fence script, it would be better to use a
substitution token. That is to say, the user would configure "myfence.sh
$TARGETHOST foo bar" and Hadoop would substitute the target. This would allow
use of pre-existing scripts that might have a different ordering of arguments
without a wrapper.
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