What is an automated and serverless way to invoke the function?
Deploy an Amazon EC2 instance based on Linux, and edit its /etc/crontab file by adding a command to periodically invoke the Lambda function.
Configure an environment variable named PERIOD for the Lambda function. Set the value to 600.
Create an Amazon EventBridge rule that runs on a regular schedule to invoke the Lambda function.
Create an Amazon Simple Notification Service (Amazon SNS) topic that has a subscription to the Lambda function with a 600-second timer.
Explanations:
Using an Amazon EC2 instance to invoke the Lambda function is not serverless and requires managing infrastructure. This approach involves manual setup and maintenance of the EC2 instance and its cron jobs, making it inefficient for a serverless application.
Setting an environment variable named PERIOD does not automatically invoke the Lambda function. Environment variables are used to configure runtime settings for the Lambda function but do not trigger invocations on their own.
Amazon EventBridge can create a rule that invokes the Lambda function based on a defined schedule, such as every 10 minutes. This is a fully serverless solution that does not require any infrastructure management, making it ideal for this requirement.
While Amazon SNS can trigger a Lambda function, it does not have a built-in timer feature. Additionally, creating a subscription to invoke a Lambda function with a timer would require external mechanisms to publish messages to the SNS topic periodically, which is not fully serverless for the intended use case.
I organize that the answer is:
Create an Amazon EventBridge rule that runs on a regular schedule to invoke the Lambda function.