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@k2r2bai
• CRD - Custom Resource Definition: definition of new resource in kube that can be
used in yaml to specify instances (eg Statefulsets, pre-official cron jobs, prometheus).
• Controller: A service that listens for events and acts to converge the system to the
desired state from the actual state.
• Operator: A controller built with the listen-act pattern based on events from
kubernetes on resources. Usually encapsulates a human as an expert system to
operate a service.
Definitions