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https://issues.apache.org/jira/browse/YARN-9708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17689098#comment-17689098
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Krishan Goyal commented on YARN-9708:
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[~slfan1989] how is client delegation token supported behind multiple router
instances for clients using RPC ?
I believe delegation token validation happens during RPC connection.
If router instances are behind a load balancer, there is no direct RPC
connection from client to Router right ?
> Yarn Router Support DelegationToken
> -----------------------------------
>
> Key: YARN-9708
> URL: https://issues.apache.org/jira/browse/YARN-9708
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: router
> Affects Versions: 3.4.0
> Reporter: Xie YiFan
> Assignee: Shilun Fan
> Priority: Major
> Labels: pull-request-available
> Attachments: Add_getDelegationToken_and_SecureLogin_in_router.patch,
> RMDelegationTokenSecretManager_storeNewMasterKey.svg,
> RouterDelegationTokenSecretManager_storeNewMasterKey.svg
>
>
> 1.we use router as proxy to manage multiple cluster which be independent of
> each other in order to apply unified client. Thus, we implement our
> customized AMRMProxyPolicy that doesn't broadcast ResourceRequest to other
> cluster.
> 2.Our production environment need kerberos. But router doesn't support
> SecureLogin for now.
> https://issues.apache.org/jira/browse/YARN-6539 desn't work. So we
> improvement it.
> 3.Some framework like oozie would get Token via yarnclient#getDelegationToken
> which router doesn't support. Our solution is that adding homeCluster to
> ApplicationSubmissionContextProto & GetDelegationTokenRequestProto. Job would
> be submitted with specified clusterid so that router knows which cluster to
> submit this job. Router would get Token from one RM according to specified
> clusterid when client call getDelegation meanwhile apply some mechanism to
> save this token in memory.
>
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