Create an AWS Lambda Function

  1. Go to the AWS Lambda console: https://console.aws.amazon.com/lambda.
    For this example, choose the region us-east-1 (Northern Virginia).

  2. In the navigation pane, on the left side of the console, select Functions (Functions).

  3. Choose Create Function (Create Role). create function

    • Select Author from scratch (create from scratch)
    • In Function name (function name) insert multi-region-test-function. In Runtime, choose Node.js 14.x.
    • To create the role, select Create (Create). create function
    • The function will be created and you will be redirected to the console’s function editor. In Function Code (Function Code) Copy and paste the code below:
    exports.handler = async (event) => {
   console.log("chamando função lambda...")
   const response = {
        statusCode: 200,
        body: JSON.stringify('Testando o import e export de funções Lambda!'),
   };
   return response;
};
    • Click Test (test) in the top right corner. A pop-up will appear prompting you to set up a test event. create function
    • Select Create new test event (Create new test event), give it the name eventdata in the field Event name (event name) and click Create (Create)
    • Click again Test. The message Execution result: succeeded should appear. By clicking on details, a payload JSON should appear with the text * Hello from Lambda! *. create function

  4. Your Lambda function was created successfully! We will now export it from the current region for further import into another region.

Export the created Lambda function

  1. Go to the AWS Lambda console: https://console.aws.amazon.com/lambda.
    Remembering that for this example we are using the region for now us-east-1 (Northern Virginia).
  2. In the list of roles, select the role multi-region-test-function created earlier. The Configuration tab will appear.
  3. Click Actions -> Export Function create function
    • A pop-up will open offering two options for download: Download AWS SAM file or Download deployment package.
    • Select Deployment package and wait for the download. Note that the downloaded file is a zip file, but with no extension. After downloading, rename the file with the .zip extension so we can use it later.

Import the Lambda function into the second region

  1. Go to the AWS Lambda console: https://console.aws.amazon.com/lambda.
  2. Select the region in the combo in the upper right corner of the console.
    For this example, I will use the region sa-east-1 - South America (Sao Paulo)
  3. If the function doesn’t exist:
    • Perform steps 1.2 and 3 in item 3 of the section Create an AWS Lambda Function above.
  4. In the list of roles, select the role multi-region-test-function created. The Configuration tab will appear.
    • Under Function Code, click Actions, upload to .zip file. upload
      • You can also import your function through an S3 bucket. For this, select Upload a file from Amazon S3 and enter the URL where the.zip is located.
    • Select the previously downloaded zip file (don’t forget to rename it with the .zip extension) and click Save.
    • (Optional) If you want to test your function, set up the test payload as we did in steps 5.6 and 7 of item 3 in Create a Lambda function above.
  5. Ready! Its Lambda function has been copied from one region to another.

Cleaning up

  1. Delete the lambda functions created in both regions.