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AWS IAM Roles with example

IAM (Identity and Access Management) is a service in Amazon Web Services (AWS) that enables you to manage access to AWS resources. IAM identities include users and roles.

  • Users: Users are IAM identities that represent people or processes that interact with AWS resources. Users can be created within IAM and can be granted permissions to access specific resources or perform specific actions within your AWS account.

  • Roles: Roles are IAM identities that represent permissions to access resources and perform actions. Roles are not associated with a specific person or process, but rather are assumed by AWS resources or external users.

Use cases for IAM roles include:


  • Granting permissions to AWS resources: You can create an IAM role and grant it permissions to access specific resources or perform specific actions within your AWS account. This allows you to control which resources and actions can be accessed by the role.

  • Granting permissions to external users: You can create an IAM role and grant it permissions to access specific resources or perform specific actions within your AWS account. This allows you to grant access to external users (such as those from another AWS account) without sharing your AWS login credentials.

  • Granting permissions to AWS services: Some AWS services, such as Amazon EC2 and AWS Lambda, require permissions to access other resources within your AWS account. You can create an IAM role and grant it the necessary permissions, and then assign the role to the service.

To create an IAM role in AWS, follow these steps:


  • Sign in to the AWS Management Console and navigate to the IAM dashboard.
  • In the left navigation pane, click Roles.
  • Click the Create role button.
  • Select the type of entity that will assume the role. For example, you might select an AWS service or a third-party identity provider.
  • Select the permissions that you want to grant to the role. You can choose from predefined policies or create your own custom policies.
  • Enter a name for the role and a brief description.
  • Click the Create role button to create the role.

Here is an example of creating an IAM role that allows an Amazon EC2 instance to access an Amazon S3 bucket:


  • Sign in to the AWS Management Console and navigate to the IAM dashboard.
  • In the left navigation pane, click Roles.
  • Click the Create role button.
  • Select AWS service as the type of entity that will assume the role.
  • Select EC2 as the service that will use the role.
  • Select the AmazonS3ReadOnlyAccess policy to grant the role read-only access to the Amazon S3 service.
  • Enter a name for the role, such as "EC2S3ReadOnlyRole," and a brief description.
  • Click the Create role button to create the role.
  • Attach the role to your Amazon EC2 instance when you launch it or by modifying the instance's IAM role after it has been launched.
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