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https://issues.apache.org/jira/browse/HADOOP-14620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16074551#comment-16074551
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Ilya Fourmanov commented on HADOOP-14620:
-----------------------------------------
Upon further investigation it turned out that setting
fs.s3a.bucket.dshbasebackup.endpoint=s3.eu-west-1.amazonaws.com seems to have
no effect as hadoop was going through default endpoint s3.amazonaws.com. I'm on
2.7.3.
However it turns out that using default endpoint actually works for buckets
hosted in eu-west-1. And authentication succeeds for them.
Going through region specific endpoint s3.eu-west-1.amazonaws.com fails with 403
> S3A authentication failure for regions other than us-east-1
> -----------------------------------------------------------
>
> Key: HADOOP-14620
> URL: https://issues.apache.org/jira/browse/HADOOP-14620
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 2.8.0, 2.7.3
> Reporter: Ilya Fourmanov
> Attachments: s3-403.txt
>
>
> hadoop fs s3a:// operations fail authentication for s3 buckets hosted in
> regions other than default us-east-1
> Steps to reproduce:
> # create s3 bucket in eu-west-1
> # Using IAM instance profile or fs.s3a.access.key/fs.s3a.secret.key run
> following command:
> {code}
> hadoop --loglevel DEBUG -D fs.s3a.endpoint=s3.eu-west-1.amazonaws.com -ls
> s3a://your-eu-west-1-hosted-bucket/
> {code}
> Expected behaviour:
> You will see listing of the bucket
> Actual behaviour:
> You will get 403 Authentication Denied response for AWS S3.
> Reason is mismatch in string to sign as defined in
> http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html
> provided by hadoop and expected by AWS.
> If you use https://aws.amazon.com/code/199 to analyse StringToSignBytes
> returned by AWS, you will see that AWS expects CanonicalizedResource to be in
> form
> /your-eu-west-1-hosted-bucket{color:red}.s3.eu-west-1.amazonaws.com{color}/.
> Hadoop provides it as /your-eu-west-1-hosted-bucket/
> Note that AWS documentation doesn't explicitly state that endpoint or full
> dns address should be appended to CanonicalizedResource however practice
> shows it is actually required.
> I've also submitted this to AWS for them to correct behaviour or
> documentation.
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