AWS Lambda Container in Go

readme.md

# Create the working directory
mkdir hello

# Change to the directory
cd hello

# Create the files: main.go and Dockerfile

# Initialize the module in Go
go mod init example.com/hello

# Build the go app for Linux
GOOS=linux go build

# Build the docker image
docker build -t lambdatest .

# Run the docker image
docker run -p 9000:8080 lambdatest

# Send a CURL request with a payload
curl -XPOST "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{"name":"steve"}'

# Should output: "Hello steve!"

Dockerfile

FROM public.ecr.aws/lambda/go:1

# Copy function code
COPY hello ${LAMBDA_TASK_ROOT}

# Set the CMD to your handler (could also be done as a parameter override outside of the Dockerfile)
CMD [ "hello" ]

main.go

package main

import (
	"context"
	"fmt"

	"github.com/aws/aws-lambda-go/lambda"
)

type MyEvent struct {
	Name string `json:"name"`
}

func HandleRequest(ctx context.Context, name MyEvent) (string, error) {
	return fmt.Sprintf("Hello %s!", name.Name), nil
}

func main() {
	lambda.Start(HandleRequest)
}

Thank you for this, I created https://github.com/Binogi/golang-aws-lambda-docker partly based on your Gist.

Thank you for this, I created https://github.com/Binogi/golang-aws-lambda-docker partly based on your Gist.

I appreciate the thanks and sharing your work!!

When doing docker build I get this:

 => [internal] load build definition from Dockerfile                       0.0s
 => => transferring dockerfile: 37B                                        0.0s
 => [internal] load .dockerignore                                          0.0s
 => => transferring context: 2B                                            0.0s
 => [internal] load metadata for public.ecr.aws/lambda/go:1                1.1s
 => [internal] load build context                                          0.0s
 => => transferring context: 2B                                            0.0s
 => [1/2] FROM public.ecr.aws/lambda/go:1@sha256:b0fe93c122d4113a8a6470c3  0.0s
 => ERROR [2/2] COPY hello /var/task                                       0.0s
------
 > [2/2] COPY hello /var/task:
------
failed to compute cache key: "/hello" not found: not found```

Needed to go go build