Using aws iam with emrserverless

Question

Pulumi · Accepted Answer

To use AWS IAM with Amazon EMR Serverless, you would need to set up roles and policies that grant the necessary permissions for the EMR Serverless service to operate. IAM roles are a secure way to delegate permissions that do not explicitly expose your AWS credentials. In this context, you need a role that the EMR Serverless service assumes to access resources on your behalf.

Here is how you would typically set up the required IAM role and policies using Pulumi with TypeScript:

1. Create an IAM role with a trust relationship policy document allowing EMR Serverless to assume the role.
2. Attach policies to the IAM role that grant the permissions necessary for EMR Serverless to function, such as accessing S3 buckets, cloudwatch, etc.

The following Pulumi program creates an IAM role and attaches a managed policy that's tailored for the EMR Serverless service. Ensure you replace the placeholder policy ARN with the specific ARN that suits EMR Serverless's needs.

```typescript
import * as aws from "@pulumi/aws";

// Create an IAM Role that EMR Serverless can assume
const emrServerlessRole = new aws.iam.Role("emrServerlessRole", {
    assumeRolePolicy: JSON.stringify({
        Version: "2012-10-17",
        Statement: [{
            Action: "sts:AssumeRole",
            Effect: "Allow",
            Principal: {
                Service: "emr-serverless.amazonaws.com",
            },
        }],
    })
});

// Attach a policy to the role. This policy should be modified based on the actual permissions required by EMR Serverless.
const policyArn = "arn:aws:iam::aws:policy/AmazonElasticMapReduceFullAccess"; // Example policy - replace with the one you need.
const rolePolicyAttachment = new aws.iam.RolePolicyAttachment("emrServerlessPolicyAttachment", {
    role: emrServerlessRole.name,
    policyArn: policyArn,
});

// Export the name of the role
export const emrServerlessRoleName = emrServerlessRole.name;
```

In this program:

- We import the AWS module from Pulumi's AWS SDK.
- We create an IAM Role, `emrServerlessRole`, with a trust relationship that allows the `emr-serverless.amazonaws.com` service to assume the role. This is done using the `aws.iam.Role` resource from Pulumi's AWS provider.
- We then attach a managed policy that provides full access to Amazon EMR services to the role we created. For attaching a managed policy, we use `aws.iam.RolePolicyAttachment`.
- We are using `AmazonElasticMapReduceFullAccess` as an example policy. You should replace this with the minimum required policies for your specific use case. It's a best practice to follow the principle of least privilege and only give the necessary permissions.
- We export the name of the IAM role, which can be used in other parts of our Pulumi code or for reference.

You need to run this code using Pulumi CLI, which will create the resources defined in AWS. Please ensure you have the Pulumi CLI installed and configured as well as AWS credentials configured on your machine where you run Pulumi commands.