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A DevOps team wants to ensure that a critical web application pod runs on a dedicated set of nodes with SSDs. Which Kubernetes feature should they use to achieve this?
Node affinity is a Kubernetes feature that allows you to constrain which nodes a pod can be scheduled on based on node labels. By labeling nodes with SSDs (e.g., `disk-type=ssd`) and defining a `requiredDuringSchedulingIgnoredDuringExecution` node affinity rule in the pod spec, t…Read full explanation
A Kubernetes cluster has a deployment with 3 replicas. After a node failure, you notice that only 2 pods are running, and the deployment has not rescheduled the missing pod. What is the most likely cause?
When a node fails, the node controller marks the node as `NodeReady=False` and waits for a configurable timeout (`pod-eviction-timeout`, default 5 minutes) before evicting pods. Until eviction, the deployment's ReplicaSet sees the pod as still existing (though on an unreachable n…Read full explanation
You have a StatefulSet with 5 pods, each requiring a unique stable network identity. The StatefulSet is scaled down from 5 to 3. Which pods will be terminated?
When a StatefulSet is scaled down, Kubernetes terminates pods in reverse order of their ordinal indices, starting from the highest. For a StatefulSet with 5 pods (ordinals 0-4) scaled to 3, pods with ordinals 4 and 3 are terminated first, ensuring that the remaining pods (0, 1, 2…Read full explanation
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