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https://issues.apache.org/jira/browse/HADOOP-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16693721#comment-16693721
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Íñigo Goiri commented on HADOOP-14556:
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Thanks [~ste...@apache.org] for [^HADOOP-14556-021.patch].
* I think we can solve most of the checkstyle issues left here )specially left
spaces).
* {{to directly authenticate with S3 and DynamoDB services..}}, you have a
double dot here.
* The indices in core-default.xml are dupe, I'm not sure if there's a point on
having a number; anyway, if we keep it we should change the numbers.
* The {{assertEquals}} message in {{AbstractContractGetFileStatusTest}} should
have a space or something in between.
* {{AWSCredentialProviderList}} now does LOG and throw, I think we should keep
it as just throw.
* Constants#DEFAULT_ASSUMED_ROLE_STS_ENDPOINT should fit in one line.
* S3AUtils#getCanonicalServiceURI has comments left behind.
* IAMInstanceCredentialsProvider#getCredentials leaves comments behind.
* In MarshalledCredentialProvider#NAME can use the class.getName() or one of
the variations?
* MarshalledCredentials#equals can use EqualsBuilder (same for
EncryptionSecrets).
* We use the {{Collections.unmodifiableList(Arrays.asList(}} a lot, it might be
worth adding a method to define constant lists.
In general I can provide a very high level review but somebody else should
review deeper.
In any case, general comments:
* The documentation seems to cover the added cases well; it might be worth
doing a full pass to these documents once everything is finished up.
* The unit tests cover the basic cases well.
* Very long patch and even though there are a bunch of interfaces which are
pretty verbose, there is a lot here. I'm not sure if there are ways to split
it. For example the utilities to fetch the DT.
> S3A to support Delegation Tokens
> --------------------------------
>
> Key: HADOOP-14556
> URL: https://issues.apache.org/jira/browse/HADOOP-14556
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.2.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Attachments: HADOOP-14556-001.patch, HADOOP-14556-002.patch,
> HADOOP-14556-003.patch, HADOOP-14556-004.patch, HADOOP-14556-005.patch,
> HADOOP-14556-007.patch, HADOOP-14556-008.patch, HADOOP-14556-009.patch,
> HADOOP-14556-010.patch, HADOOP-14556-010.patch, HADOOP-14556-011.patch,
> HADOOP-14556-012.patch, HADOOP-14556-013.patch, HADOOP-14556-014.patch,
> HADOOP-14556-015.patch, HADOOP-14556-016.patch, HADOOP-14556-017.patch,
> HADOOP-14556-018a.patch, HADOOP-14556-019.patch, HADOOP-14556-020.patch,
> HADOOP-14556-021.patch, HADOOP-14556.oath-002.patch, HADOOP-14556.oath.patch
>
>
> S3A to support delegation tokens where
> * an authenticated client can request a token via
> {{FileSystem.getDelegationToken()}}
> * Amazon's token service is used to request short-lived session secret & id;
> these will be saved in the token and marshalled with jobs
> * A new authentication provider will look for a token for the current user
> and authenticate the user if found
> This will not support renewals; the lifespan of a token will be limited to
> the initial duration. Also, as you can't request an STS token from a
> temporary session, IAM instances won't be able to issue tokens.
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