[jira] [Reopened] (HDFS-9005) Provide configuration support for upgrade domain

["Zhe Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-9005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhe Zhang reopened HDFS-9005:
-----------------------------

> Provide configuration support for upgrade domain
> ------------------------------------------------
>
>                 Key: HDFS-9005
>                 URL: https://issues.apache.org/jira/browse/HDFS-9005
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ming Ma
>            Assignee: Ming Ma
>             Fix For: 2.9.0, 3.0.0-alpha1
>
>         Attachments: HDFS-9005-2.patch, HDFS-9005-3.patch, HDFS-9005-4.patch, HDFS-9005.branch-2.8.001.patch, HDFS-9005.patch
>
>
> 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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