Summary
Amazon CloudWatch is the built-in observability platform for AWS that collects and analyzes metrics, logs, and events from AWS services and custom applications in a unified console.
What is CloudWatch?
CloudWatch automatically ingests metrics from virtually every AWS service — EC2 instances, Lambda functions, RDS databases, and more — without any additional configuration. Teams can define custom metrics, set alarms on thresholds, and trigger automated responses through Amazon EventBridge or Auto Scaling.
CloudWatch Logs centralizes application and infrastructure log streams, and CloudWatch Logs Insights provides an SQL-like query language for real-time log analysis. CloudWatch Synthetics enables canary scripts that proactively test endpoints and APIs.
For teams using AWS heavily, CloudWatch reduces the operational overhead of running a separate monitoring stack. Grafana and Prometheus can also ingest CloudWatch metrics via the CloudWatch exporter for teams that prefer open-source tooling.
Why is CloudWatch relevant?
- Native integration: Zero-config metrics collection for all AWS managed services
- Unified view: Metrics, logs, and traces in one console reduce tool sprawl
- Automated remediation: Alarms can trigger Lambda functions or Auto Scaling actions
- Cost visibility: CloudWatch dashboards surface resource utilization for cost optimization