Tutorial: Create the Lambda function

To create a target Lambda function

1. Open the Amazon Lambda console at https://console.amazonaws.cn/lambda/.

2. Choose Create function, Author from scratch.

3. For Function name, enter batch-event-stream-handler.

4. For Runtime, choose Python 3.8.

5. Choose Create function.

6. In the Code source section, edit the sample code to match the following example:

   import json
   
   
   def lambda_handler(event, _context):
       # _context is not used
       del _context
       if event["source"] != "aws.batch":
           raise ValueError("Function only supports input from events with a source type of: aws.batch")
   
       print(json.dumps(event))
   

   This is a simple Python 3.8 function that prints the events sent by Amazon Batch. If everything is configured correctly, at the end of this tutorial, the event details appear in the CloudWatch Logs log stream that's associated with this Lambda function.

7. Choose Deploy.