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https://issues.apache.org/jira/browse/HADOOP-13945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Santhosh G Nayak updated HADOOP-13945:
--------------------------------------
    Attachment: HADOOP-13945.6.patch

Thanks [~liuml07] for reviewing the patch.

I have created a rebased patch excluding the changes in HADOOP-13930 (as it is 
already committed) and addressed the following review comments, 

(1)  {{fs.azure.authorization.remote.service.url}} was introduced in 
HADOOP-13930. Current patch does not have any reference to it.

(2)  In code to log a message, keeping the exception as well.

(3) Unfortunately, 
{{UserGroupInformation.getCurrentUser().getCredentials().getToken(WasbDelegationTokenIdentifier.TOKEN_KIND)}}
 does not work, it takes only alias. Moving this logic to a util method.

(4) Fixed the nit by removing {{()}} for {{&&}} in {{if (isSecurityEnabled && 
(delegationToken != null && !delegationToken.isEmpty()))}}.

(5) Added {{package-info.java}} instead of {{package.html}}.

(6) Created Util methods to avoid duplicate code wherever possible.

(7), (8), (9) and (10) comments are related changes in HADOOP-13930 and already 
addressed there.

(11) Handled it appropriately to the best of my knowledge, let me know if think 
otherwise.


> Azure: Add Kerberos and Delegation token support to WASB client.
> ----------------------------------------------------------------
>
>                 Key: HADOOP-13945
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13945
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/azure
>    Affects Versions: 2.8.0
>            Reporter: Santhosh G Nayak
>            Assignee: Santhosh G Nayak
>         Attachments: HADOOP-13945.1.patch, HADOOP-13945.2.patch, 
> HADOOP-13945.3.patch, HADOOP-13945.4.patch, HADOOP-13945.5.patch, 
> HADOOP-13945.6.patch
>
>
> Current implementation of Azure storage client for Hadoop ({{WASB}}) does not 
> support Kerberos Authentication and FileSystem authorization, which makes it 
> unusable in secure environments with multi user setup. 
> To make {{WASB}} client more suitable to run in Secure environments, there 
> are 2 initiatives under way for providing the authorization (HADOOP-13930) 
> and fine grained access control (HADOOP-13863) support.
> This JIRA is created to add Kerberos and delegation token support to {{WASB}} 
> client to fetch Azure Storage SAS keys (from Remote service as discussed in 
> HADOOP-13863), which provides fine grained timed access to containers and 
> blobs. 
> For delegation token management, the proposal is it use the same REST service 
> which being used to generate the SAS Keys.



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