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https://issues.apache.org/jira/browse/HADOOP-19535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18005270#comment-18005270
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ASF GitHub Bot commented on HADOOP-19535:
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shameersss1 commented on PR #7802:
URL: https://github.com/apache/hadoop/pull/7802#issuecomment-3071617785
> -1 to adding to the default chain, it changes behaviour in a way which
isn't obvious to anyone looking at a system.
>
> if you deploy on an older release, auth will fail. asking for an explicit
declaration of the provider makes it work everywhere.
Make sense. I will change the narrative of the PR to Fix credential provider
chain List
> S3A : Add WebIdentityTokenFileCredentialsProvider to default S3 credential
> provider chain
> -----------------------------------------------------------------------------------------
>
> Key: HADOOP-19535
> URL: https://issues.apache.org/jira/browse/HADOOP-19535
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Reporter: Syed Shameerur Rahman
> Assignee: Syed Shameerur Rahman
> Priority: Major
> Labels: pull-request-available
>
> The current default s3 credential provider chain is set in the order of
> {code:java}
> org.apache.hadoop.fs.s3a.TemporaryAWSCredentialsProvider,org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider,software.amazon.awssdk.auth.credentials.EnvironmentVariableCredentialsProvider,org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider{code}
> Refer [code ref
> |https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml#L1450]for
> more details.
>
> This works perfectly fine when used in AWS EC2, EMR Serverless, but not with
> AWS EKS pods.
>
> For EKS pods, It is recommended to use
> {code:java}
> software.amazon.awssdk.auth.credentials.WebIdentityTokenFileCredentialsProvider
> , software.amazon.awssdk.auth.credentials.ContainerCredentialsProvider
> (PodIdentity is enabled){code}
> WebIdentityTokenFileCredentialsProvider is an AWS credentials provider that
> enables applications to obtain temporary AWS credentials by assuming an IAM
> role using a web identity token (like OAuth or OIDC tokens). It's
> particularly important in EKS as it's the underlying mechanism that makes
> IRSA (IAM Roles for Service Accounts) work.
>
>
> ContainerCredentialsProvider is already part of
> org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider
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