AWS S3 Bucket Creation

Posted on December 27, 2018

Try to create a bucket with the Python library: boto3

from boto3.session import Session
session=Session(aws_access_key_id='key1', aws_secret_access_key='key2')
s3 = session.resource('s3')

but failed to run the script with errors:

  1. botocore.exceptions.ClientError: An error occurred (IllegalLocationConstraintException) when calling the CreateBucket operation: The unspecified location constraint is incompatible for the region specific endpoint this request was sent to.

  2. botocore.errorfactory.BucketAlreadyExists: An error occurred (BucketAlreadyExists) when calling the CreateBucket operation: The requested bucket name is not available. The bucket namespace is shared by all users of the system. Please select a different name and try again.

It’s weird because the bucket can be created by the following code:

import boto3
s3 = boto3.resource('s3')

Searched on the Internet and found the solution – Bucket name should conform with DNS requirements (Should in FQDN format):

  • Should not contain uppercase characters
  • Should not contain underscores (_)
  • Should be between 3 and 63 characters long
  • Should not end with a dash
  • Cannot contain two, adjacent periods
  • Cannot contain dashes next to periods (e.g., “” and “my.-bucket” are invalid)

It works after I changed the bucket name to ‘ke.testbucket’. Related links:

  1. s3.create_bucket() fails if the region is set to ‘ap-northeast-2’#781
  2. Strange behavior when trying to create an S3 bucket in us-east-1 #125
  3. The specified bucket is not valid errors?

AWS S3 Bucket Creation


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