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https://issues.apache.org/jira/browse/HADOOP-19612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Trezzo resolved HADOOP-19612.
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Resolution: Fixed
> Add Support for Propagating Access Token via RPC Header in HDFS
> ---------------------------------------------------------------
>
> Key: HADOOP-19612
> URL: https://issues.apache.org/jira/browse/HADOOP-19612
> Project: Hadoop Common
> Issue Type: New Feature
> Components: hadoop-common
> Reporter: Tom McCormick
> Assignee: Tom McCormick
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0
>
>
> *Description:*
> To support modern authentication models (e.g., bearer tokens, OAuth2), we
> propose adding support in HDFS to propagate an access token via the RPC
> request header. This enables downstream services (e.g., NameNode, Router) to
> validate access tokens in a secure and standardized way.
> The token will be passed in a dedicated field in the
> {{{}RpcRequestHeaderProto{}}}, mimicking the behavior of an HTTP
> {{Authorization: Bearer <token>}} header. The caller context or UGI may
> extract this token and use it for authorization decisions or auditing.
> *Benefits:*
> * Enables secure, token-based authentication in multi-tenant environments
> * Lays the foundation for fine-grained, per-request authorization
> *Scope:*
> * Add optional {{authorization_token}} field to RPC header
> * Ensure token is thread-local or caller-context scoped
> * Wire it through relevant client and server code paths
> * Provide configuration to enable/disable this feature
> *Notes:*
> This feature is intended to be backward-compatible with existing HDFS
> clients. If the token is not set, behavior will remain unchanged.
> At Linkedin, we plan to delegate auth to a custom enforcement point in RBF.
> The workflow is the client will get an access token and pass that in the RPC.
> The request and access token will be authorized in the custom authorizer.
>
>
> *PR*
> [https://github.com/apache/hadoop/pull/7803/files#diff-55740268215623b4037dd1bd35200c383576bee23d444096eb9cee751e3728f3]
>
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