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From "Shane Kumpf (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5404) Add the ability to split reverse zone subnets
Date Tue, 26 Jul 2016 19:58:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394441#comment-15394441
] 

Shane Kumpf commented on YARN-5404:
-----------------------------------

Uploading a new patch that addresses the comments above. Please let me know if I missed any
or if you have additional suggestions.

> Add the ability to split reverse zone subnets
> ---------------------------------------------
>
>                 Key: YARN-5404
>                 URL: https://issues.apache.org/jira/browse/YARN-5404
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Shane Kumpf
>            Assignee: Shane Kumpf
>         Attachments: YARN-5404-YARN-4757.001.patch, YARN-5404-YARN-4757.001.patch, YARN-5404-YARN-4757.001.patch,
YARN-5404.001.patch
>
>
> In some environments, the entire container subnet may not be used exclusively by containers
(ie the YARN nodemanager host IPs may also be part of the larger subnet). 
> As a result, the reverse lookup zones created by the YARN Registry DNS server may not
match those created on the forwarders.
> For example:
> Network: 172.27.0.0
> Subnet: 255.255.248.0
> Hosts:
> 0.27.172.in-addr.arpa
> 1.27.172.in-addr.arpa
> 2.27.172.in-addr.arpa
> 3.27.172.in-addr.arpa
> Containers
> 4.27.172.in-addr.arpa
> 5.27.172.in-addr.arpa
> 6.27.172.in-addr.arpa
> 7.27.172.in-addr.arpa
> YARN Registry DNS only allows for creating (as the total IP count is greater than 256):
> 27.172.in-addr.arpa
> Provide configuration to further subdivide the subnets.



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