Do I need to create a IAM user to assume a role?

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I created an application in typescript that talks to AWS Fargate tasks. But I need to create temporary access and secret keys to be used in the application. Do I need to create an IAM user and assign the role to be assumed by that user, or, is it possible to use the IAM Role that has the required permissions in the application without providing an IAM user creds?

quldude
已提問 8 個月前檢視次數 378 次
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To your question, IAM roles can be assumed by IAM User and IAM role. Please refer Use IAM Roles for complete list of who can assume roles and method of assuming role.

Additionally refer Temporary credentials request.

Your application can leverage either IAM User or IAM Roles Anywhere for this purpose.

  1. With IAM User, IAM user would have access of AssumeRole for that role and you'd make sure that IAM role has all the required permissions to access AWS resources, which your typescript application needs. IAM user would be considered simple but less secure way of doing this as you'll store the access key and secret access key somewhere and can be leaked. If you go with IAM user route, I'd advise you to keep rotating them periodically and use variables for these and store them in a file and that credential file can be read by specific set of users only.

  2. IAM Roles Anywhere is relatively new feature and cal also be used in this use case, please refer following two blog posts, which covers the topic and provide guidance, how to set it up:

Hope this explanation helps.

Abhishek

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專家
已回答 8 個月前
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已審閱 8 個月前
  • If the application is running outside of AWS, I would then need an IAM user tied to that assumed role correct?

  • There are two ways, you can do that, one is use IAM user and that IAM user would have assume role permissions for the role that has all the required permissions.

    Other one is IAM role anywhere, relatively new feature for same use case. I have added these details to my answer too.

    Don't hesitate to ask further questions, happy to help.

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