Observability

Logs, metrics, traces, and alerting — how you find out what a system is actually doing.

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Beginner0 of 1 complete

Observability Fundamentals
Logs, metrics, and traces - the three pillars that let you understand a system you didn't build yourself.

Intermediate0 of 2 complete

Working with Logs
Structured logging, log levels, and centralizing logs with journald and friends.
Metrics & Dashboards
The handful of metrics that matter, and why Prometheus scrapes instead of waiting to be told.

Advanced0 of 1 complete

Alerting That Doesn't Cry Wolf
Thresholds, alert fatigue, and the difference between something worth paging a human for and something that can wait.

Expert0 of 1 complete

Distributed Tracing
Following one request across a dozen microservices with trace IDs and spans.