Ming Ma created HDFS-9005:
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Summary: Provide support for upgrade domain script
Key: HDFS-9005
URL: https://issues.apache.org/jira/browse/HDFS-9005
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Ming Ma
As part of the upgrade domain feature, we need to provide a mechanism to
specify upgrade domain for each datanode. One way to accomplish that is to
allow admins specify an upgrade domain script that takes DN ip or hostname as
input and return the upgrade domain. Then namenode will use it at run time to
set {{DatanodeInfo}}'s upgrade domain string. The configuration can be
something like:
{noformat}
<property>
<name>dfs.namenode.upgrade.domain.script.file.name</name>
<value>/etc/hadoop/conf/upgrade-domain.sh</value>
</property>
{noformat}
just like topology script,
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