advancedProduction: HA, DR, Namespace Strategy & Cluster Hardening
What is the difference between cluster HA and application HA?
Cluster HA means the Kubernetes management layer (control plane) can survive failures. Application HA means your application can continue serving traffic despite node or Pod failures. Both require independent design: 3-AZ control plane gives cluster HA; topology-spread Deployments with multiple replicas and PodDisruptionBudgets give application HA.
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