go-lambda-sns-example

README

Go Lambda SNS Example

An example of creating a Go Lambda function, an SNS Topic and subscribing the Lambda to the newly created topic.
You can change the names and descriptions of the Function, Topic etc.

Deployment

In order to deploy this you need to compile your Go Lambda function and upload it to S3 as a .zip file.
You then need to update your functions CodeUri in the CloudFormation template.yaml file to point to the bucket where you uploaded the zipped Lambda function to.

AWS Docs
A .zip file archive is a deployment package for your Lambda function that consists of your code (a Go executable) and any dependencies.

After you create the deployment package, you can upload it directly to an AWS S3 bucket in the Region where you want to create the Lambda function. Or, you can upload the .zip file archive first and then specify the S3 bucket name and object key name when you create the function using the Lambda console or the AWS CLI.

Unix

Download the Lambda library for Go with go get, and compile your executable.

~/my-function$ go get github.com/aws/aws-lambda-go/lambda
~/my-function$ GOOS=linux go build main.go

Setting GOOS to linux ensures that the compiled executable is compatible with the Go runtime, even if you compile it in a non-Linux environment.

Windows

Creating a deployment package on Windows:
To create a .zip file archive that works on Lambda using Windows, we recommend installing the build-lambda-zip tool. To download the build-lambda-zip tool, run the following command:

go.exe get -u github.com/aws/aws-lambda-go/cmd/build-lambda-zip

Use the tool from your GOPATH. If you have a default installation of Go, the tool is typically in %USERPROFILE%\Go\bin. Otherwise, navigate to where you installed the Go runtime and do one of the following:

In cmd.exe, run the following:

set GOOS=linux
go build -o main
%USERPROFILE%\Go\bin\build-lambda-zip.exe -output _lambda.zip main