6. Observability is tooling or a technical solution that allows
teams to actively debug their system.
Observability is based on exploring properties and patterns
not defined in advance.
Google Cloud Architecture Center - DevOps Guides
工具或技術的解決方案
更輕易的 debug
沒有事先定義好
https://cloud.google.com/architecture/devops/devops-measurement-monitoring-and-observability