- CloudWatch Docs: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/WhatIsCloudWatch.html
- CloudWatch Regional Endpoints: https://docs.aws.amazon.com/general/latest/gr/rande.html#cw_region
- EC2 Custom Metrics: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/publishingMetrics.html
- CloudWatch Agent: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/install-CloudWatch-Agent-on-first-instance.html
- CloudWatch Enhanced Monitoring Scripts: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/mon-scripts.html
- CloudWatch Alarms: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html