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https://issues.apache.org/jira/browse/HDFS-9005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ming Ma updated HDFS-9005:
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Attachment: HDFS-9005.patch
[~ctrezzo] will create a new jira for the design around "passing datanode
admins properties via ClientProtocol" approach. Meanwhile, we should go ahead
and use the existing refreshNodes flow to provide upgrade domain support; also
some of the components such as json and datanode admin data structure can be
reused later in the long-term design. Here is the draft patch that allows
admins to specify all DN properties in one json file. Example:
{noformat}
{"hostName": "host1"}
{"hostName": "host2", "port": 50, "upgradeDomain": "ud0"}
{"hostName": "host3", "port": 0, "adminState": "DECOMMISSIONED"}
{noformat}
* Abstract host file manager into an interface for both the new json approach
and the old include/exclude approach to implement.
* Implement json file manager. The default is still the old include/exclude
approach.
* Have {{DatanodeManager}} get the upgrade domain from the host file manager.
* Refactor test code w.r.t. host file writing.
> 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
> Attachments: 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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