How to Create a Monitoring System with AWS Technologies and Twilio Voice

This is a summary of how to create a monitoring system using Twilio Voice and AWS. The system will alert you when CPU utilization percentage of an EC2 instance is over a specific threshold value. To achieve this, the system uses AWS CloudWatch for monitoring instance metrics, AWS Simple Notification Service (SNS) for notifying a Lambda function that monitored metrics exceed a certain threshold, and AWS Lambda for executing Twilio API requests to alert you using your phone number. The process involves creating an EC2 instance with a key pair, security group, and VPC; setting up an SNS topic; configuring a CloudWatch alarm; creating a Java application using Gradle; building the application into a zip file; creating an AWS Lambda function; setting environment variables for the lambda function; creating an SNS topic subscription; and testing the alert system. The final step involves simulating high CPU utilization in the instance to test the setup and verifying that the system works as expected.