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https://issues.apache.org/jira/browse/FLINK-8439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek updated FLINK-8439:
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Fix Version/s: 1.5.0
> Document using a custom AWS Credentials Provider with flink-3s-fs-hadoop
> ------------------------------------------------------------------------
>
> Key: FLINK-8439
> URL: https://issues.apache.org/jira/browse/FLINK-8439
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Reporter: Dyana Rose
> Priority: Trivial
> Fix For: 1.5.0
>
>
> This came up when using the s3 for the file system backend and running under
> ECS.
> With no credentials in the container, hadoop-aws will default to EC2 instance
> level credentials when accessing S3. However when running under ECS, you will
> generally want to default to the task definition's IAM role.
> In this case you need to set the hadoop property
> {code:java}
> fs.s3a.aws.credentials.provider{code}
> to a fully qualified class name(s). see [hadoop-aws
> docs|https://github.com/apache/hadoop/blob/1ba491ff907fc5d2618add980734a3534e2be098/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/index.md]
> This works as expected when you add this setting to flink-conf.yaml but there
> is a further 'gotcha.' Because the AWS sdk is shaded, the actual full class
> name for, in this case, the ContainerCredentialsProvider is
> {code:java}
> org.apache.flink.fs.s3hadoop.shaded.com.amazonaws.auth.ContainerCredentialsProvider{code}
>
> meaning the full setting is:
> {code:java}
> fs.s3a.aws.credentials.provider:
> org.apache.flink.fs.s3hadoop.shaded.com.amazonaws.auth.ContainerCredentialsProvider{code}
> If you instead set it to the unshaded class name you will see a very
> confusing error stating that the ContainerCredentialsProvider doesn't
> implement AWSCredentialsProvider (which it most certainly does.)
> Adding this information (how to specify alternate Credential Providers, and
> the name space gotcha) to the [AWS deployment
> docs|https://ci.apache.org/projects/flink/flink-docs-release-1.4/ops/deployment/aws.html]
> would be useful to anyone else using S3.
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