CloudWatch to OTel: Tearing Down the Observability Bridge Pattern

Short summary

AWS CloudWatch-to-OpenTelemetry bridge pattern consolidates metrics from managed services (Lambda, RDS, EKS, API Gateway) into unified observability backends via two ingestion paths: low-latency Metric Streams ($300/mo for 100k series) or fine-grained polling. Critical for financial environments handling >50k metric series/minute, requiring idempotency, circuit breakers, and DLQ safeguards to prevent business-metric exfiltration.

• •Bridge pattern pipes AWS metrics into OTLP-compatible backends like Datadog, Grafana, Honeycomb for unified alerting and dashboarding
• •Metric Streams offers 2–3s latency with predictable cost; polling offers fine-grained control but risks API throttling and breaks SLOs at scale
• •Financial environments must implement IAM conditions, encrypted DLQs, and endpoint validation to prevent sensitive business-metric leakage

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