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https://issues.apache.org/jira/browse/HADOOP-18610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17755204#comment-17755204
 ] 

ASF GitHub Bot commented on HADOOP-18610:
-----------------------------------------

hadoop-yetus commented on PR #5953:
URL: https://github.com/apache/hadoop/pull/5953#issuecomment-1681050961

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   0m 31s |  |  the patch passed  |
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   | -0 :warning: |  checkstyle  |   0m 22s | 
[/results-checkstyle-hadoop-tools_hadoop-azure.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5953/1/artifact/out/results-checkstyle-hadoop-tools_hadoop-azure.txt)
 |  hadoop-tools/hadoop-azure: The patch generated 1 new + 2 unchanged - 0 
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |   2m 10s |  |  hadoop-azure in the patch 
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   | +1 :green_heart: |  asflicense  |   0m 40s |  |  The patch does not 
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   |  |   | 130m 46s |  |  |
   
   
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5953/1/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/5953 |
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   | modules | C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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> ABFS OAuth2 Token Provider to support Azure Workload Identity for AKS
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-18610
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18610
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: tools
>    Affects Versions: 3.3.4
>            Reporter: Haifeng Chen
>            Priority: Critical
>              Labels: pull-request-available
>         Attachments: HADOOP-18610-preview.patch
>
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> In Jan 2023, Microsoft Azure AKS replaced its original pod-managed identity 
> with with [Azure Active Directory (Azure AD) workload 
> identities|https://learn.microsoft.com/en-us/azure/active-directory/develop/workload-identities-overview]
>  (preview), which integrate with the Kubernetes native capabilities to 
> federate with any external identity providers. This approach is simpler to 
> use and deploy.
> Refer to 
> [https://learn.microsoft.com/en-us/azure/aks/workload-identity-overview|https://learn.microsoft.com/en-us/azure/aks/workload-identity-overview.]
>  and [https://azure.github.io/azure-workload-identity/docs/introduction.html] 
> for more details.
> The basic use scenario is to access Azure cloud resources (such as cloud 
> storage) from Kubernetes (such as AKS) workload using Azure managed identity 
> federated with Kubernetes service account. The credential environment 
> variables in pod projected by Azure AD workload identity are like following:
> AZURE_AUTHORITY_HOST: (Injected by the webhook, 
> [https://login.microsoftonline.com/])
> AZURE_CLIENT_ID: (Injected by the webhook)
> AZURE_TENANT_ID: (Injected by the webhook)
> AZURE_FEDERATED_TOKEN_FILE: (Injected by the webhook, 
> /var/run/secrets/azure/tokens/azure-identity-token)
> The token in the file pointed by AZURE_FEDERATED_TOKEN_FILE is a JWT (JASON 
> Web Token) client assertion token which we can use to request to 
> AZURE_AUTHORITY_HOST (url is  AZURE_AUTHORITY_HOST + tenantId + 
> "/oauth2/v2.0/token")  for a AD token which can be used to directly access 
> the Azure cloud resources.
> This approach is very common and similar among cloud providers such as AWS 
> and GCP. Hadoop AWS integration has WebIdentityTokenCredentialProvider to 
> handle the same case.
> The existing MsiTokenProvider can only handle the managed identity associated 
> with Azure VM instance. We need to implement a WorkloadIdentityTokenProvider 
> which handle Azure Workload Identity case. For this, we need to add one 
> method (getTokenUsingJWTAssertion) in AzureADAuthenticator which will be used 
> by WorkloadIdentityTokenProvider.
>  



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