How to Deploy a Go App to AWS Lambda

You deploy a Go app to AWS Lambda by compiling it as a static binary, packaging it into a ZIP file, and uploading it via the AWS CLI or Console.

1. Compile your Go application as a static binary for Linux ARM64 architecture.

GOOS=linux GOARCH=arm64 go build -o main main.go

2. Create a ZIP archive containing the binary named main.

zip function.zip main

3. Create a new Lambda function and upload the ZIP file as the deployment package.

aws lambda create-function --function-name my-go-function --runtime provided.al2 --role arn:aws:iam::123456789012:role/lambda-execution-role --handler main --zip-file fileb://function.zip

Note: Replace the IAM role ARN with your actual execution role ARN.

Deploying a Go App to AWS Lambda turns your code into a single file that runs on Amazon's servers without needing a traditional web server. Think of it like packing a suitcase with just the clothes you need for a trip, then handing it to the airline (AWS) to store and use only when someone books a flight (triggers your function). You use this when you need to run code only when specific events happen, like a file upload or a web request, to save money and manage scaling automatically.