New pattern - lambda-managed-instances-bedrock-cdk

[NithinChandranR-AWS]

New Serverless Pattern: Lambda Managed Instances + Bedrock (CDK)

Description

Deploys a Lambda function on Managed Instances (EC2-backed compute) that invokes Amazon Bedrock (Claude) for text generation. Demonstrates a real-world Bedrock use case beyond the existing hello-world Managed Instances pattern.

Architecture

User → Lambda Function (on Managed Instances / EC2)
         ├── VPC with private subnets
         ├── CapacityProvider (ARM64 / Graviton)
         └── Bedrock InvokeModel → Claude response

Key Features

• EC2-backed Lambda: Runs on dedicated EC2 instances with Graviton ARM64 architecture
• VPC integration: Private subnets with NAT Gateway for Bedrock API access
• Least-privilege IAM: Bedrock permissions scoped to inference profile ARN
• Production-ready: 2048 MB memory (Managed Instances minimum), nodejs24.x runtime, CloudWatch logging

Bugs Found & Fixed During Deploy

1. Managed Instances require memorySize >= 2048 MB (not the default 128 MB)
2. Managed Instances require nodejs24.x runtime (not nodejs22.x)
3. Function architecture: ARM_64 must match CapacityProvider architecture

Deployed & Tested ✅

Deployed to a live AWS account and tested end-to-end. Bedrock (Claude) returned a valid response via Lambda on Managed Instances.

Files

• lib/lambda-managed-instances-bedrock-stack.ts — CDK stack
• src/index.js — Lambda handler (Bedrock invocation)
• example-pattern.json — Pattern metadata
• README.md — Full documentation with architecture, deploy, and test instructions