What should the SysOps administrator do to meet these requirements?
Create an AWS Cost and Usage Report. Analyze the results in Amazon Athena. Configure an alarm to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic when costs reach 75% of the threshold. Subscribe the email distribution list to the topic.
Create an Amazon CloudWatch billing alarm to detect when costs reach 75% of the threshold. Configure the alarm to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the email distribution list to the topic.
Use AWS Budgets to create a cost budget for data transfer costs. Set an alert at 75% of the budgeted amount. Configure the budget to send a notification to the email distribution list when costs reach 75% of the threshold.
Set up a VPC flow log. Set up a subscription filter to an AWS Lambda function to analyze data transfer. Configure the Lambda function to send a notification to the email distribution list when costs reach 75% of the threshold.
Explanations:
AWS Cost and Usage Reports and Athena can track costs, but it would require more complex setup and query processing. It’s not the simplest solution for alerting when the costs reach a threshold.
CloudWatch billing alarms do not support tracking data transfer costs at the granularity needed for this specific requirement, especially cross-region data transfer costs.
AWS Budgets is designed for tracking costs and setting up alerts based on thresholds. It directly supports setting alerts for 75% of a budget and can notify an email distribution list, making it the most efficient option.
VPC flow logs provide network traffic data, but they do not track cost information. Analyzing costs from flow logs requires additional steps and is not ideal for cost-based alerting.
I systematize that the answer is:
Use AWS Budgets to create a cost budget for data transfer costs. Set an alert at 75% of the budgeted amount. Configure the budget to send a notification to the email distribution list when costs reach 75% of the threshold.