/rust-on-lambda

Deploying simple Rust function to AWS Lambda

Primary LanguageMakefile

Rust + λ

Based on example from https://github.com/awslabs/aws-lambda-rust-runtime

Prerequisites:

  • Install: rust, aws cli, zip
  • (on MacOS) install libc cross-compiler
brew install filosottile/musl-cross/musl-cross && \
    ln -s /usr/local/bin/x86_64-linux-musl-gcc /usr/local/bin/musl-gcc

1. Build

cargo build --release --target x86_64-unknown-linux-musl

2. Deploy

NOTE: create IAM role first (here lambda_test role is used)

zip -j lambda.zip target/x86_64-unknown-linux-musl/release/bootstrap

aws lambda create-function --function-name rustTest \
    --handler doesnt.matter \
    --zip-file fileb://./lambda.zip \
    --runtime provided \
    --role arn:aws:iam::XXXXXXXXXX:role/lambda_test \
    --environment Variables={RUST_BACKTRACE=1} \
    --tracing-config Mode=Active

3. ???

4. Profit!

aws lambda invoke \
    --function-name rustTest \
    --payload '{ "greeting": "howdy 🤙", "name": "Rust + λ"}'
    output.json
    
jq . output.json

Output:

{
  "message": "howdy 🤙, Rust + λ!"
}

Or use Makefile FTW!:

make deploy test

Resources

Rust runtime for AWS Lambda: https://github.com/awslabs/aws-lambda-rust-runtime

Setting it up: https://aws.amazon.com/blogs/opensource/rust-runtime-for-aws-lambda/