4.2.5 Implement Notification Alerts

Notification Alerts for Specific Actions

CloudWatch Alarms

States: OK → ALARM → INSUFFICIENT_DATA

Useful Alarms

Composite Alarms

• AND/OR logic combining multiple alarms
• Reduce noise: Alert only when multiple conditions met
• Example: CPU high AND error rate high

Quota Limit Notifications

Scenario thi: Configure notification về quota limits

Giải pháp:

• CloudWatch alarms notify khi approaching quota value threshold
• Quota data có thể được saved trong CloudTrail
• AWS Service Quotas integration
• Trusted Advisor checks

Ví dụ: Automation alert via email khi reach defined percentage của WorkSpaces quota

# Lambda to gather total WorkSpaces deployed
# Send SNS email when quota breached
# EventBridge Rule to trigger Lambda

Deployment Completion Notifications

AWS CodeStar Notifications:

• Subscribe to events trong CodeBuild, CodeCommit, CodeDeploy, CodePipeline
• Receive notifications khi deployment completes
• SNS topic integration

# CodePipeline → SNS on stage completion
- Name: NotifyOnDeploy
  Actions:
    - Name: SNSNotify
      ActionTypeId:
        Category: Approval
        Provider: Manual
      Configuration:
        NotificationArn: !Ref AlertTopic

CloudWatch Anomaly Detection

• Machine learning-based anomaly detection
• Automatically creates alarm thresholds
• Adapts to metric patterns over time
• Reduces false positives

API Gateway Cache Metrics

Scenario thi: Application metrics related to cache hits/misses với API Gateway + Lambda không populate trên CloudWatch dashboard.

Root cause: Không monitor API executions, thiếu wider view của application performance.

Giải pháp: Enable API Gateway caching và monitor:

• CacheHitCount
• CacheMissCount
• Add to CloudWatch dashboard