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https://issues.apache.org/jira/browse/HADOOP-14808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16141913#comment-16141913
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John Zhuge commented on HADOOP-14808:
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Yeah, the next logical step (more secure) is to use DT or another token type
based on {{TokenIdentifier}}.
For example, the new transient AAD Credential Provider can place Access Token
into UGI token map. Of course, the renewal code for AAD Access Token should be
added.
Possibly evolving into HADOOP-9392 if we decouple Kerberos and DT and make all
mechanisms pluggable and equal.
> Hadoop keychain
> ---------------
>
> Key: HADOOP-14808
> URL: https://issues.apache.org/jira/browse/HADOOP-14808
> Project: Hadoop Common
> Issue Type: New Feature
> Components: security
> Affects Versions: 2.7.0
> Reporter: John Zhuge
> Assignee: John Zhuge
>
> Extend the idea from HADOOP-6520 "UGI should load tokens from the
> environment" to a generic lightweight "keychain" design. Load keys (secrets)
> into a keychain in UGI (secret map) at startup. YARN will distribute them
> securely into each container. The Hadoop code running in the container can
> then retrieve the credentials from UGI.
> The use case is Bring Your Own Key (BYOK) credentials for cloud connectors
> (adl, wasb, s3a, etc.), while Hadoop authentication is still Kerberos. No
> configuration change, no admin involved. It will support YARN applications
> initially, e.g., DistCp, Tera Suite, Spark-on-Yarn, etc.
> Implementation is surprisingly simple because almost all pieces are in place:
> * Retrieve secrets from UGI using {{conf.getPassword}} backed by the existing
> Credential Provider class {{UserProvider}}
> * Reuse Credential Provider classes and interface to define local permanent
> or transient credential store, e.g., {{LocalJavaKeyStoreProvider}}
> * New: create a new transient Credential Provider that logs into AAD with
> username/password or device code, and then put the Client ID and Refresh
> Token into the keychain
> * New: create a new permanent Credential Provider based on Hadoop
> configuration XML, for dev/testing purpose.
> Links
> * HADOOP-11766 Generic token authentication support for Hadoop
> * HADOOP-11744 Support OAuth2 in Hadoop
> * HADOOP-10959 A Kerberos based token authentication approach
> * HADOOP-9392 Token based authentication and Single Sign On
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