CloudWatch Alarms
Source: doonops-curriculum/aws-observability--cloudwatch-alarms.md
Doonops lesson
Goal
Alarm = smoke detector on metrics (CPU high, 5xx errors).
Simple explanation
If errors > 10 in 5 min → send email/SMS via SNS.
Technical view
If errors > 10 in 5 min → send email/SMS via SNS.
Think of it like
If errors > 10 in 5 min → send email/SMS via SNS.
Steps
- Read simple section
- Read analogy + diagram
- Copy project files
- Do local lab
Deep explanation
Layman words first, then technical detail — read slowly
Define metric, threshold, period, action.
Example (Doonops)
Modern HCL — names are examples, not from any third-party course
# see project files
Terraform runs on your computer — copy this HCL into a folder, then follow the local lab steps below.
Quick check
- Explain topic to a friend in 2 sentences
- Did local lab steps
Project files for this lab
Full implementation folder — copy all files, then run terraform commands
Lab project files (full folder)
Copy every file below into one folder — same as a real repo module. Then run the local lab steps.
Suggested folder: Suggested path: ~/doonops-terraform/18-cloudwatch/
versions.tfSee file purpose in the code belowterraform {
required_version = ">= 1.9.0"
}