Observability¶
Understanding what your systems are doing — and why.
The Three Pillars¶
Logs → what happened (events, errors, audit trail)
Metrics → how much / how fast (numbers over time)
Traces → where it happened across services (distributed request flow)
Observability = all three, correlated.
Notes in This Section¶
| Note | Source |
|---|---|
| APM & Monitoring | Apprenticeship, Feb 2026 |
| CloudWatch | Coming |
AWS Observability Stack¶
| Purpose | Service |
|---|---|
| Logs | CloudWatch Logs |
| Metrics + Alarms | CloudWatch Metrics + Alarms |
| Dashboards | CloudWatch Dashboards |
| Distributed tracing | AWS X-Ray |
| Insights from logs | CloudWatch Logs Insights |
| Contributor analysis | CloudWatch Contributor Insights |
| Application signals | CloudWatch Application Signals |