Compute Notifier

Compute Notifier stack will provision Cloud Watch event trigger, lambda and an SNS topic. The event trigger will be triggered based on the cron expression which will trigger the lambda that will push SNS notification if there are any EC2 instances running in the AWS account.
The configuration is defined in cdk.json

Provisioning Compute Notifier

• Define your configuration in cdk.json
  • Make sure to at add least one email for notifications
  • Update schedule_expression to define when is the event triggered
    • https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/ScheduledEvents.html
• Bootstrap
  cdk --profile $AWS_PROFILE bootstrap
• synth
  cdk --profile $AWS_PROFILE synth
• deploy
  cdk --profile $AWS_PROFILE deploy
• destroy
  cdk --profile $AWS_PROFILE destroy

You can set deployment environment by setting environment variable DEPLOY_ENVIRONMENT
DEPLOY_ENVIRONMENT=prod cdk --profile $AWS_PROFILE synth
Default environment is dev

Adding Auxiliary Configuration

The cdk.json configuration can be overwritten per invironment by adding a config file into the aux_config folder. The name of the file should be {env}.json
The structure of aux config should be:

{
  "emails": [
    "email address"
  ],
  "schedule_expression": "cron(* 18 ? * * *)"
}

Notes

Cron time is in GMT

Requirements

• AWS CDK
  npm install -g aws-cdk
• Node.js >= 10.3.0
• Python >= 3.6
• Create python virtual env
  • python3 -m venv .env
• Run pip3 to install required modules
  • pip3 install .