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CKA study material · question 545 of 1000

An engineer installs a CNI plugin whose manifest assumes 10.244.0.0/16, but Pods never get addresses in that range. What was most likely missed at kubeadm init?

  1. --service-cidr matching the plugin's range
  2. --pod-network-cidr matching the plugin's range
  3. --apiserver-advertise-address on the Pod network
  4. --cri-socket pointing at the plugin
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Answer: B. --pod-network-cidr matching the plugin's range

Some Pod network add-ons require a specific Pod CIDR, and kubeadm init takes --pod-network-cidr for exactly that; the value has to match what the plugin's manifest assumes.

Source: Creating a cluster with kubeadm (Kubernetes) — Initializing your control-plane node

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