AWS IAM Role Configuration for Large Language Model Services

Question

Pulumi · Accepted Answer

To configure an AWS IAM Role specifically for Large Language Model (LLM) services, we'll define an IAM Role that can be assumed by services requiring access to AWS resources. This role will include a trust relationship policy allowing LLM services to assume it, and a set of permissions policies that grant the necessary actions on required resources.

We'll start by creating the IAM Role and defining the AssumeRole policy to trust LLM services. AWS IAM service-linked roles specific to large language models aren't predefined, but you can tailor a role for any AWS service that supports service-linked roles or define a trust relationship with an external service.

Then, you need to attach policies granting permission to access the AWS services that your LLM services will need to interact with. This could include Amazon S3 for dataset storage, Amazon EC2 for compute resources, or any other AWS service that is required for your specific workload. You create a policy document in JSON format that specifies these permissions.

I'll walk you through configuring an IAM Role with a hypothetical trust policy and permissions policy within Pulumi using Python.

Before running this Pulumi code, ensure you have the following prerequisites met:

1. Pulumi CLI installed.
2. AWS account and AWS CLI configured with the necessary access rights.
3. Python and Pulumi's Python SDK installed in your working environment.

Here is a Pulumi program that creates an IAM role for LLM services, with a trust relationship allowing a large language model service to assume the role and a dummy inline policy that provides access to S3 (you will likely need to adjust this policy based on your actual service requirements):

```python
import json
import pulumi
import pulumi_aws as aws

# Create an IAM Role
llm_role = aws.iam.Role("llmRole",
    # The trust relationship policy document in JSON format.
    assume_role_policy=json.dumps({
        "Version": "2012-10-17",
        "Statement": [{
            "Effect": "Allow",
            "Principal": {
                "Service": "llm-service.amazonaws.com"
            },
            "Action": "sts:AssumeRole"
        }]
    })
)

# Policy Document providing access to S3 (replace with actual permissions required)
s3_policy_document = aws.iam.get_policy_document(statements=[{
    "actions": ["s3:*"],
    "resources": ["*"],
    "effect": "Allow"
}])

# Attach the policy to the IAM Role
s3_policy = aws.iam.RolePolicy("llmRolePolicy",
    role=llm_role.id,
    policy=s3_policy_document.json,
)

# Export the IAM role name
pulumi.export('llm_role_name', llm_role.name)
```

This code defines an AWS IAM Role (`llmRole`) with an assume role policy that trusts a service `llm-service.amazonaws.com` to assume the role. Be aware that `llm-service.amazonaws.com` is a placeholder, and you should replace it with the actual service principal of the large language model service you are using.

We then create an IAM Role Policy (`llmRolePolicy`) that has a list of actions allowed on all S3 resources. The `get_policy_document` function is a helper that generates the JSON for an IAM policy, based on the provided statements in a format that Pulumi can understand. Remember to modify the actions and resources to match the actual policies your large language model service requires.

Finally, we export the IAM role name so it can be easily referenced or used in other stacks or configurations.

Adjust the policy details as necessary to meet your security and access requirements. Remember that providing broad access with `"actions": ["s3:*"]` and `"resources": ["*"]` can be insecure, so it's better to restrict the scope where possible.