Day-28: Amazon CloudWatch & Monitoring — Summary

• Amazon CloudWatch is AWS’s monitoring and observability service for your cloud resources and applications.
• It collects metrics, logs, and events to track performance and health.

⚙️ Key Components

• Metrics: Data points like CPUUtilization, NetworkIn, DiskReadOps.
• Alarms: Trigger notifications or actions when a metric crosses a threshold.
• Logs: Capture application or system logs from EC2, Lambda, etc.
• Dashboards: Visualize metrics and logs in real-time.
• Events: React to changes automatically using EventBridge.

🧠 Why Use CloudWatch

• Detect performance issues early.
• Automate scaling actions via alarms.
• Centralized logging for troubleshooting.
• Optimize cost and resource usage.

⚡ Example Use Case

• Create an alarm for EC2: if CPU > 80%, send an SNS alert or trigger Auto Scaling.
• View Lambda execution metrics or S3 storage usage trends in dashboards.