[jira] [Commented] (YARN-11391) Support using DNS to resolve yarn services to IP addresses

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-11391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17676416#comment-17676416 ] 

ASF GitHub Bot commented on YARN-11391:
---------------------------------------

slfan1989 commented on PR #5297:
URL: https://github.com/apache/hadoop/pull/5297#issuecomment-1381265177

   @lnbest0707 Thanks for your contribution, we are waiting for the compilation result of yetus.




> Support using DNS to resolve yarn services to IP addresses
> ----------------------------------------------------------
>
>                 Key: YARN-11391
>                 URL: https://issues.apache.org/jira/browse/YARN-11391
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Shuyi Zhang
>            Priority: Major
>              Labels: pull-request-available
>
> We have been using A-record (hostname) for discovering YARN control planes(RM, JHS) from both the server and client sides. The components discover each other using hostnames (DNS A-records) which are preconfigured in YARN configurations (mapred-site.xml and yarn-site.xml). However, the hard-coded address mapping is prohibitive to perform appropriate failure recovery and node replacement. Any host replacement, adding, or removing requires client integration, which is a quite painful process. 
> It is essential to find a solution where the discovery configuration of different components in the cluster stays intact and is able to resolve with the latest hostname/records. 



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