IAM roles are essential for our services to interact with each other in AWS.

In this article we’ll be using the example of Lambda functions since we use them to interact with many of our AWS services.

When you want Lambda to integrate with services like DynamoDB, API Gateway, SNS or EventBridge for example, we must explicitly add an IAM role with the appropriate policies in order to let Lambda communicate with these services.

Let’s take a look at how to do this.

Read more here:

https://medium.com/technology-hits/how-to-set-iam-roles-permissions-for-lambda-to-interact-with-other-aws-services-3ad8a22c598d