When creating an elastic beanstalk environment it gets terminated throwing a S3_MALFORMED_POLICY error

Question

When trying to create an elastic beanstalk environment it kept toss an error about the s3 bucket it creates. I went through the security on the service role it currently uses has the worker role on it i verified it had access to the s3 i dont know if there is supposed to be a policy on the bucket itself for access but i can't find anything in iam that would cause this issue.

Riku_Kobayashi · Answer

Hello.

Try revising your bucket policy like in the Stackoverflow answer below.  
https://stackoverflow.com/a/61903042

re:Post Agent · Answer

The S3_MALFORMED_POLICY error you're encountering when creating an Elastic Beanstalk environment could be due to several reasons:

1. IAM Role Permissions: While you've verified that the service role has the worker role, it's important to ensure that the IAM role associated with your Elastic Beanstalk environment has the necessary permissions to interact with S3. The role should have, at minimum, permissions for s3:GetObject and s3:ListBucket.

2. S3 Bucket Policy: You mentioned that you're not sure if there should be a policy on the bucket itself. In most cases, Elastic Beanstalk doesn't require a specific bucket policy for the S3 buckets it creates and uses. However, if there is an existing bucket policy, it might be conflicting with the permissions Elastic Beanstalk needs.

3. Account-level S3 settings: Check your account-level S3 settings, particularly the Block Public Access settings. If these are too restrictive, they might interfere with Elastic Beanstalk's ability to configure the S3 bucket properly.

4. VPC Configuration: If you're using a custom VPC for your Elastic Beanstalk environment, ensure it's properly configured with the necessary components like internet gateway, security groups, and subnets to allow traffic between Elastic Beanstalk and S3.

To troubleshoot this issue:

1. Double-check the IAM role permissions, ensuring it has the AWSElasticBeanstalkFullAccess policy or equivalent custom policy with necessary S3 permissions.

2. If there's an existing S3 bucket policy, review it to ensure it's not overly restrictive.

3. Check your account's S3 Block Public Access settings and adjust if necessary.

4. Review your VPC configuration if you're using a custom VPC.

5. Consider using AWS CloudTrail to get more detailed information about the API calls being made and any specific permission issues.

If the issue persists after these checks, you may need to contact AWS Support for further assistance, as they can provide more specific guidance based on your account's configuration.  
**Sources**  
[Error Creating Elastic Beanstalk Environment on AWS Free Tier: Reasons and Resolutions? | AWS re:Post](https://repost.aws/questions/QUkbIKZPCeQeSTqDFI9YvhLA/error-creating-elastic-beanstalk-environment-on-aws-free-tier-reasons-and-resolutions)

When creating an elastic beanstalk environment it gets terminated throwing a S3_MALFORMED_POLICY error

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