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https://issues.apache.org/jira/browse/HADOOP-10607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14070596#comment-14070596
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Larry McCay commented on HADOOP-10607:
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The keystore provider is useful even without a central authenticating server
for many usecases.
Ideally and eventually, we will have a kerberos authenticating server to serve
such credentials but in the meantime the keystore is a way to persist the
password without being in clear text. Coupled with file permissions this is
stronger protection than file permissions alone. Later migration to a central
credential server will be easily accomplished through the use of the API. We
are taking babysteps to get where we need to be while satisfying user
requirements in a reasonable manner along the way.
> Create an API to Separate Credentials/Password Storage from Applications
> ------------------------------------------------------------------------
>
> Key: HADOOP-10607
> URL: https://issues.apache.org/jira/browse/HADOOP-10607
> Project: Hadoop Common
> Issue Type: New Feature
> Components: security
> Reporter: Larry McCay
> Assignee: Larry McCay
> Fix For: 3.0.0, 2.6.0
>
> Attachments: 10607-10.patch, 10607-11.patch, 10607-12.patch,
> 10607-2.patch, 10607-3.patch, 10607-4.patch, 10607-5.patch, 10607-6.patch,
> 10607-7.patch, 10607-8.patch, 10607-9.patch, 10607-branch-2.patch, 10607.patch
>
>
> As with the filesystem API, we need to provide a generic mechanism to support
> multiple credential storage mechanisms that are potentially from third
> parties.
> We need the ability to eliminate the storage of passwords and secrets in
> clear text within configuration files or within code.
> Toward that end, I propose an API that is configured using a list of URLs of
> CredentialProviders. The implementation will look for implementations using
> the ServiceLoader interface and thus support third party libraries.
> Two providers will be included in this patch. One using the credentials cache
> in MapReduce jobs and the other using Java KeyStores from either HDFS or
> local file system.
> A CredShell CLI will also be included in this patch which provides the
> ability to manage the credentials within the stores.
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