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Observability Foundations - Observability & Production Incidents | Aporeon

Observability & Production Incidents

Observability Foundations

Logs, metrics, traces, correlation IDs, dependency telemetry, OpenTelemetry, health checks, and telemetry cost control.

7 drillsPractice one at a timeOrdered pathComparison questionConcept question

Recommended start

Logs Metrics Traces

Explains the different diagnostic roles of logs, metrics, and traces during backend production issues.

Easy~5 minStep 1 of 7

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1Logs Metrics TracesRecommended startExplains the different diagnostic roles of logs, metrics, and traces during backend production issues.Comparison questionEasy~5 min.NETApplication InsightsASP.NET CorePractice

Practice order

7 drillsOne at a time

1Logs Metrics TracesUp next / Easy / ~5 min
2Correlation IDsEasy / ~5 min
3Structured LogsMedium / ~7 min

2

Correlation IDsExplains correlation IDs across request logs, dependency calls, queues, workers, and support investigations.Concept questionEasy~5 min.NETApplication InsightsASP.NET Core

Practice

3Structured LogsExplains structured logging fields, safe context, redaction, event naming, and avoiding secret or personal-data leaks.Concept questionMedium~7 min.NETApplication InsightsASP.NET CorePractice

4DependenciesExplains dependency duration, error rate, timeout rate, query tagging, Redis latency, HTTP downstream calls, and endpoint correlation.Concept questionMedium~7 min.NETApplication InsightsASP.NET CorePractice

5OTel vs App InsightsCompares vendor-neutral OpenTelemetry concepts with Application Insights usage for .NET production services.Comparison questionMedium~7 min.NETApplication InsightsASP.NET CorePractice

6Health ChecksExplains health checks that prove an API can serve traffic without becoming fragile dependency probes.Comparison questionMedium~7 min.NETApplication InsightsASP.NET CorePractice

7Sampling and CostExplains sampling, high-cardinality labels, retention, cost, and keeping enough signal for incident diagnosis.Concept questionHard~9 min.NETApplication InsightsASP.NET CorePractice

4Dependencies

Medium / ~7 min

5OTel vs App InsightsMedium / ~7 min

6Health ChecksMedium / ~7 min

7Sampling and CostHard / ~9 min