The requirement is to monitor and notify whenever a non-production EC2 instance is started during

the night. Amazon EventBridge offers a robust solution by triggering workflows in response to

events.

Setting up Amazon EventBridge: Create an EventBridge rule that listens for the "EC2 Instance State-

change Notification" event. Configure the rule to trigger only when instances transition to the

"running" state.

Lambda Function: Attach a Lambda function as the target of the EventBridge rule. This function will

execute when an EC2 instance starts. Inside the Lambda function, implement logic to check the

current time and confirm it is during the night hours. Additionally, the function will check the

instance's tags to verify if it's labeled as "non-production".

Notification via Amazon SNS: If the conditions are met (non-production and nighttime), the Lambda

function publishes a message to an Amazon SNS topic specifically set up for this alert. The IT

manager is subscribed to this topic, enabling them to receive an email notification almost

instantaneously when the event occurs.

This solution is operationally efficient as it leverages serverless components that are inherently

scalable and cost-effective, providing real-time monitoring and notifications without the need for

continuous polling or complex infrastructure.