Create Lambda in account 1

1. Open the Lambda console https://console.aws.amazon.com/lambda

2. Click Create a function

3. Accept the default Author from scratch

4. Enter function name as Lambda-List-S3

5. Select Python 3.7 runtime

6. Expand Permissions, click Use an existing role, then select the Lambda-List-S3-Role

7. Click Create function

8. Replace the example function code with the following

   • Replace bucketname with the S3 bucket name from account 2

     import json
     import boto3
     import os
     import uuid
     
     def lambda_handler(event, context):
         try:
     
             # Create an S3 client
             s3 = boto3.client('s3')
     
             # Call S3 to list current buckets
             objlist = s3.list_objects(
                             Bucket='bucketname',
                             MaxKeys = 10)
     
             print (objlist['Contents'])
             return str(objlist['Contents'])
     
     
         except Exception as e:
             print(e)
             raise e
     

9. Click Save.

10. Click Test, accept the default event template, enter an event name for the test, then click Create

11. Click Test again, and in a few seconds the function output should highlight green and you can expand the detail to see the response from the S3 API