Tenet V
Observability and Memory
Logs, metrics, traces, events, and audit. The archive that preserves truth when stories get loud.
Ceremonial Statement
What you cannot observe will betray you.
“Write the truth where it can survive the fire. Let metrics be your pulse, logs your testimony, traces your map, and events your whisper.”
Plain-language Explanation
Observability is what makes reconciliation trustworthy.
Kubernetes is distributed and asynchronous. Incidents are rarely single-cause, and “what happened” becomes a debate. Observability prevents that debate from becoming mythology. It gives you evidence.
Tenet V is also about memory: postmortems, audit logs, runbooks, and the discipline of learning. Without memory, your platform repeats its failures with perfect consistency.
Kubernetes Mapping
Signals you should know how to read.
- Events: short-lived truth about scheduling, pulls, probes, and controller actions.
- Logs: application + system logs (kubelet, controller manager, ingress controller).
- Metrics: request rates, saturation, errors; plus kube-state-metrics and node metrics.
- Traces: request journeys through services; essential for microservice latency analysis.
- Audit: who changed what, when; crucial for governance and incident reconstruction.
Operator Mindset
Truth first. Blame never.
Instrument like you expect failure
A calm platform assumes parts will break. Observability is the mechanism by which you notice and recover.
Retain enough history
If your events expire before you investigate, you will reconstruct incidents from memory—an unreliable tool.
Write postmortems as archives
A postmortem is not punishment. It’s documentation for your future self. Encode the lesson as automation or guardrails when possible.