Deploying Identical Stacks Across Multiple AWS Accounts
Instructions
Introduction
In this guide, we will demonstrate how to deploy identical stacks across multiple AWS accounts using Pulumi with TypeScript. This approach is beneficial for organizations that need to maintain consistent infrastructure across different environments, such as development, staging, and production. The key AWS services involved in this solution include IAM roles for cross-account access, S3 buckets for state management, and the Pulumi CLI for deployment automation.
Step-by-Step Explanation
- Set Up Cross-Account IAM Roles: Create IAM roles in each target AWS account that allow the primary account to assume these roles and deploy resources.
- Configure Pulumi for Multiple Accounts: Use Pulumi configuration to manage different AWS accounts and regions.
- Create a Pulumi Program: Write a Pulumi program in TypeScript that defines the infrastructure to be deployed.
- Deploy the Stack to Multiple Accounts: Use the Pulumi CLI to deploy the stack to each AWS account by assuming the respective IAM roles.
Key Points
- IAM Roles: Ensure that the primary account has the necessary permissions to assume roles in the target accounts.
- Pulumi Configuration: Use Pulumi configuration files to manage different environments and account settings.
- Automation: Automate the deployment process using scripts or CI/CD pipelines to ensure consistency across accounts.
Conclusion
By following this guide, you can efficiently deploy and manage identical infrastructure stacks across multiple AWS accounts using Pulumi and TypeScript. This approach ensures consistency, reduces manual errors, and enhances the scalability of your infrastructure management.
Code Example
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
// Create an S3 bucket for state management
const bucket = new aws.s3.Bucket("state-management-bucket", {
bucket: "my-state-management-bucket",
});
// Create an IAM role for cross-account access
const role = new aws.iam.Role("cross-account-role", {
assumeRolePolicy: JSON.stringify({
Version: "2012-10-17",
Statement: [
{
Effect: "Allow",
Principal: {
AWS: "arn:aws:iam::PRIMARY_ACCOUNT_ID:root",
},
Action: "sts:AssumeRole",
},
],
}),
});
// Attach a policy to the role
const policyAttachment = new aws.iam.RolePolicyAttachment("role-policy-attachment", {
role: role.name,
policyArn: "arn:aws:iam::aws:policy/AdministratorAccess",
});
// Export the bucket ARN and role ARN
export const bucketArn = bucket.arn;
export const roleArn = role.arn;
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