[DNS] Support binding to sub-interfaces
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Key: HADOOP-7806
URL: https://issues.apache.org/jira/browse/HADOOP-7806
Project: Hadoop Common
Issue Type: New Feature
Components: util
Affects Versions: 0.24.0
Reporter: Harsh J
Assignee: Harsh J
Right now, with the {{DNS}} class, we can look up IPs of provided interface
names ({{eth0}}, {{vm1}}, etc.). However, it would be useful if the I/F -> IP
lookup also took a look at subinterfaces ({{eth0:1}}, etc.) and allowed binding
to only a specified subinterface / virtual interface.
This should be fairly easy to add, by matching against all available
interfaces' subinterfaces via Java.
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