The reconciliation loop in an Operator
WHAT IT TESTS: the control-loop model. OUTLINE: reconcile compares desired spec to observed state and converges them, idempotently; triggered by resource changes, watched dependents, and periodic resync.
WHAT IT TESTS: whether you understand level-triggered, idempotent reconciliation. ANSWER OUTLINE: the reconcile loop's goal is to make actual cluster state match the custom resource's desired spec. Each invocation reads desired state, observes actual state, and takes whatever actions close the gap, then requeues if needed. It is triggered by changes to the custom resource, changes to owned or watched dependent objects, periodic resync, and requeues after errors.
Read the original → interview
- #kubernetes
- #operators
- #reconciliation
- #control-loop
- #idempotency
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