John Zhuge created HADOOP-14808:
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Summary: Hadoop keychain
Key: HADOOP-14808
URL: https://issues.apache.org/jira/browse/HADOOP-14808
Project: Hadoop Common
Issue Type: New Feature
Reporter: 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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