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https://issues.apache.org/jira/browse/HADOOP-12723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15109687#comment-15109687
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Steven Wong commented on HADOOP-12723:
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I have looked at HADOOP-12537. It is good when you want to supply the
key/secret/token in the configuration and need S3 access only for a short
period of time, because the validity of the key/secret/token is short-lived. In
contrast, plugging in a credentials provider like
{{STSSessionCredentialsProvider}} allows continued S3 access for as long as
needed because it auto-refreshes the key/secret/token.
> S3A: Add ability to plug in any AWSCredentialsProvider
> ------------------------------------------------------
>
> Key: HADOOP-12723
> URL: https://issues.apache.org/jira/browse/HADOOP-12723
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs/s3
> Affects Versions: 2.7.1
> Reporter: Steven Wong
> Assignee: Steven Wong
>
> Although S3A currently has built-in support for
> {{org.apache.hadoop.fs.s3a.BasicAWSCredentialsProvider}},
> {{com.amazonaws.auth.InstanceProfileCredentialsProvider}}, and
> {{org.apache.hadoop.fs.s3a.AnonymousAWSCredentialsProvider}}, it does not
> support any other credentials provider that implements the
> {{com.amazonaws.auth.AWSCredentialsProvider}} interface. Supporting the
> ability to plug in any {{com.amazonaws.auth.AWSCredentialsProvider}} instance
> will expand the options for S3 credentials, such as:
> * temporary credentials from STS, e.g. via
> {{com.amazonaws.auth.STSSessionCredentialsProvider}}
> * IAM role-based credentials, e.g. via
> {{com.amazonaws.auth.STSAssumeRoleSessionCredentialsProvider}}
> * a custom credentials provider that satisfies one's own needs, e.g.
> bucket-specific credentials, user-specific credentials, etc.
> To support this, we can add a configuration for the fully qualified class
> name of a credentials provider, to be loaded by {{S3AFileSystem.initialize}}
> and added to its credentials provider chain.
> The configured credentials provider should implement
> {{com.amazonaws.auth.AWSCredentialsProvider}} and have a constructor that
> accepts {{(URI name, Configuration conf)}}.
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