AWS Rust Lambda POC

A simple proof-of-concept using Rust, AWS Lambda, and the AWS SDK for Rust.
Beginner-friendly. Uses a basic Lambda function that lists your S3 buckets. This repo is a small POC for starting to learn Rust and AWS Lambda, inspired by the recent support for the AWS SDK for Rust.

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Features

• AWS Lambda function written in Rust
• Uses AWS SDK for Rust
• Demonstrates listing S3 buckets
• Very small Lambda binary (2–4 MB)
• Extremely fast cold starts

References

• AWS Lambda with Rust
• AWS SDK for Rust – Developer Guide
• Building serverless applications with Rust on AWS Lambda
• The Rust Programming Language

Deploy with Cargo Lambda

Assumes AWS CLI is configured with credentials.

1. (Optional) pick profile/region:

   export AWS_PROFILE=your-profile

2. Build and deploy:

   cargo lambda build --release
   cargo lambda deploy rust-lambda-poc

3. Invoke to test (remote Lambda):

   # hello example
   cargo lambda invoke rust-lambda-poc --remote \
     --data-ascii '{"path":"/items","id":123}'
   
   # simple health check
   cargo lambda invoke rust-lambda-poc --remote \
     --data-ascii '{"path":"/health","command":"health"}'

Next step – Blog 2 CDK + HTTP API

Once you're comfortable with this single-function Lambda deployed via Cargo Lambda, the next repo in the series is rust-lambda-cdk-s3-poc, which:

• Uses AWS CDK to deploy a Rust Lambda behind HTTP API Gateway.
• Adds /health and S3-backed /items endpoints (GET/POST/DELETE).