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https://issues.apache.org/jira/browse/AMBARI-26018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ruiliang resolved AMBARI-26018.
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Resolution: Resolved
!image-2024-10-30-18-03-40-409.png!
extend the plug-in solution, we are adding federation and add a third namenode
service, not all restart, has been proven to work.
> namenodes ha A third nn service is supported
> ---------------------------------------------
>
> Key: AMBARI-26018
> URL: https://issues.apache.org/jira/browse/AMBARI-26018
> Project: Ambari
> Issue Type: Wish
> Components: ambari-server
> Affects Versions: 2.7.3
> Reporter: ruiliang
> Priority: Major
> Attachments: image-2023-10-26-11-42-30-301.png
>
>
> How to add namenode ha nn3 node service? At present, I do not see this
> operation function in the interface, can I support it? At present, the HA of
> two hadoop clusters has become an unreliable bottleneck, and it is necessary
> to expand the third nn3 service for business-demanding services.
>
> The hdp and hadoop documentation is clearly configurable, but why doesn't
> ambari support it?
>
> https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithNFS.html
> [https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.0/fault-tolerance/content/configuring_the_namenode_ha_cluster.html]
> {code:java}
> <property>
> <name>dfs.ha.namenodes.mycluster</name>
> <value>nn1,nn2,nn3</value>
> </property>{code}
> !image-2023-10-26-11-42-30-301.png!
> How does ambari accomplish the function of add nn3 in this case ？
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