Sending Notifications
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John can use AWS Simple notification Service to send the notifications.
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AWS SNS that use publishers & subscribers

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Lets create an sns topic

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Lets create subscriptions for the topic

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Now lets integrate cloud watch alarm with the sns topic

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Lets create ec2 machine and have a stress tool and create a CPU Utilization Alarm (CPU Utilization > 70 for a period of 5 mins)

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Whenever CPU Utilization is greater than 80% raise an defect in ITSM (IT Service Management)

Install AWS CLI
- Refer Here for youtube video to setup & configure aws cli
- To get available metrics execute cli commands as shown below

