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CloudWatch Alarms

This Terraform scirpt creates following Alarms to tagged EC2 instances.

  • CPUUtilization
  • mem_used_percent
  • disk_used_percent

Prerequisite

  1. Proper AWS CLI permissions to run Terraform (EC2, CloudWatch, SNS)

  2. A bunch of running EC2 instances with at least following tags

    • Name:Value (Used to name the CloudWatch Metrics)
    • Stack:Value (Used to fetch instance list)

  3. CloudWatch Agent Must be run to fetch metrics like mem_used_percent.

Example command

  • terraform init

  • terraform plan -var "profile=default" -var "region=us-east-1" -var "tag_name=Stack" -var "tag_value=Test" -var "threshold_ec2_cpu=70" -var "threshold_ec2_mem=90" -var "threshold_ec2_disk=90" -var 'sns_arn=["arn:aws:sns:us-east-1:000000000000:test"]'

  • terraform apply -var "profile=default" -var "region=us-east-1" -var "tag_name=Stack" -var "tag_value=Test" -var "threshold_ec2_cpu=70" -var "threshold_ec2_mem=90" -var "threshold_ec2_disk=90" -var 'sns_arn=["arn:aws:sns:us-east-1:000000000000:test"]'