How to trigger to create a new EC2 instance by event by using CDK?

Question

Hello there, I am writing a AWS CDK app with typescript.
When DynamoDB insert data trigger to create a new EC2 instance, with running some script saved on S3 bucket, and then terminate the instance.
Now I managed to create a SQS queue, and after data insert into DynamoDB will have a message in this queue by DynamoDB stream feature.
I can not figure out how to trigger to create a new EC2 instance? 
If use Lambda function, how to achive downloading script and running process?

Thanks for help!

Answer

Hi,

You will need 2 components to achieve your goal:
1. CDK to create a trigger on DynamoDb starting a Lambda: full corresponding typescript code at https://dev.to/aws-builders/how-to-trigger-an-aws-lambda-from-a-dynamodb-stream-event-d8
2. The Lambda starting and stopping the EC2 instance: you have security settings, Lambda code here: https://repost.aws/knowledge-center/start-stop-lambda-eventbridge

So, please, combine both to build you use case.

Best,

Didier

How to trigger to create a new EC2 instance by event by using CDK?

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