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The number of pods on a given node is determined by the --max-pods=k directive. When the address space is exhausted, no more pods can be scheduled even if from the --max-pods-perspective, the node still has capacity. The special case that a pod is scheduled and uses the node IP in the host network namespace is too "soft" to derive a guarantee. Comparing kubelet_max_pods with kube_network_node_prefix when given allows to assert that pod limits match the CIDR address space.