aws-lambda-runtime-interface-emulator | Lambda Runtime Interface Emulator is a proxy for Lambda ’ s | Cloud Functions library

There are a few ways you use the Runtime Interface Emulator (RIE) to locally test your function depending on the base image used.
You can build RIE into a base image. Download the RIE from GitHub to your local machine and update your Dockerfile to install RIE. The script checks for the presence of the AWS_LAMBDA_RUNTIME_API environment variable, which indicates the presence of the runtime API. If the runtime API is present, the script runs the runtime interface client. Otherwise, the script runs the runtime interface emulator. The following example shows a typical script for a Node.js function. #!/bin/sh if [ -z "${AWS_LAMBDA_RUNTIME_API}" ]; then exec /usr/local/bin/aws-lambda-rie /usr/bin/npx aws-lambda-ric else exec /usr/bin/npx aws-lambda-ric fi. To use the default x86_64 architecture ADD aws-lambda-rie /usr/local/bin/aws-lambda-rie ENTRYPOINT [ "/entry_script.sh" ]. To use the arm64 architecture: ADD aws-lambda-rie-arm64 /usr/local/bin/aws-lambda-rie ENTRYPOINT [ "/entry_script.sh" ].
Create a script and save it in your project directory. Set execution permissions for the script file.
Download the runtime interface emulator for your target architecture (aws-lambda-rie for x86_64 or aws-lambda-rie-arm64 for arm64) from GitHub into your project directory.
Install the emulator package and change ENTRYPOINT to run the new script by adding the following lines to your Dockerfile:
Build your image locally using the docker build command. docker build -t myfunction:latest .
Run your image locally using the docker run command. docker run -p 9000:8080 myfunction:latest