Kubernetes Operators Simplified Explanation 👇

Kubernetes Operators streamline complex application management by keeping the cluster's state in sync with the user-defined configurations in Custom Resources.

They follow a pattern of Observe, Compare, and Act

1. Observe: Operators define custom resources (CRDs) and monitor their instances (CRs) using the Operator API, while keeping track of the cluster's current resource states through the Kubernetes API Server.

2. Compare: The Operator Controller evaluates if the current state matches the desired state defined in the CRs, using a State Comparator.

3. Act: If discrepancies are found, the Operator initiates actions to reconcile the state, such as triggering a cluster rebalance to adjust resource allocations, ensuring the current state aligns with the desired state.

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