Granting IAM Group Access to Specific S3 Buckets

Solution Overview

In this solution, we will grant an IAM group access to specific S3 buckets using Pulumi. We will create an IAM group, attach a policy to the group that grants access to the specified S3 buckets, and then create the S3 buckets if they do not already exist.

Step-by-Step Explanation

Step 1: Create IAM Group

We will start by creating an IAM group using Pulumi’s AWS SDK.

Step 2: Create S3 Buckets

Next, we will create the S3 buckets if they do not already exist.

Step 3: Attach Policy to IAM Group

Finally, we will create a policy that grants access to the specified S3 buckets and attach it to the IAM group.

Summary and Conclusion

In this solution, we created an IAM group and granted it access to specific S3 buckets by attaching a policy to the group. This approach ensures that the IAM group has the necessary permissions to access the specified S3 buckets.

Full Code Example

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

// Step 1: Create IAM Group
const iamGroup = new aws.iam.Group("my-iam-group", {
    name: "my-iam-group",
});

// Step 2: Create S3 Buckets
const bucket1 = new aws.s3.Bucket("my-bucket-1", {
    bucket: "my-bucket-1",
});

const bucket2 = new aws.s3.Bucket("my-bucket-2", {
    bucket: "my-bucket-2",
});

// Step 3: Attach Policy to IAM Group
const policy = new aws.iam.Policy("my-policy", {
    description: "A policy to allow access to specific S3 buckets",
    policy: pulumi.interpolate\`{
        "Version": "2012-10-17",
        "Statement": [
            {
                "Effect": "Allow",
                "Action": [
                    "s3:ListBucket",
                    "s3:GetObject",
                    "s3:PutObject"
                ],
                "Resource": [
                    "\${bucket1.arn}",
                    "\${bucket1.arn}/*",
                    "\${bucket2.arn}",
                    "\${bucket2.arn}/*"
                ]
            }
        ]
    }\`,
});

const groupPolicyAttachment = new aws.iam.GroupPolicyAttachment("my-group-policy-attachment", {
    group: iamGroup.name,
    policyArn: policy.arn,
});

export const groupName = iamGroup.name;
export const bucket1Name = bucket1.bucket;
export const bucket2Name = bucket2.bucket;
export const policyArn = policy.arn;