AWS Lambda with Python 2.7 Error

Question

I'm using AWS Lambda to turn on\off EC2 instances at a specified intervals vai CloudWatch. I write AWS Lambda code using Python 2.7 runtime and put the code:

import boto3

region = 'xxxxxx'

instances = ['i-xxxxxxxxxx']

def lambda_handler(event, context):
    ec2 = boto3.client('ec2', region_name=region)
    ec2.stop_instances(InstanceIds=instances)
    print 'stopped your instances: ' + str(instances)

As the inline code. But I want to test the stopping of EC2 instance by manually trigger the lambda function where I get the following error in the execution log:

{
  "errorMessage": "Handler 'handler' missing on module 'index'"
}

Anyone help would be appreciated.

gkrizek · Accepted Answer · 2017-10-31 10:51:21Z

3

You need to rename lambda_handler to handler in your python script. OR tell Lambda to look for the handler of lambda_handler instead of the default handler. It is trying to execute a handler that does exist in your script and that’s why it’s erroring.

Also, you should add a return to the bottom of your function.

answered Oct 31, 2017 at 10:51

gkrizek

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