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CKA study material · question 556 of 1000

After running kubeadm reset you plan to reuse the machine as a worker in a different cluster. What does reset leave behind?

  1. The contents of /etc/kubernetes/pki
  2. iptables rules and IPVS tables
  3. The kubelet systemd unit's drop-in configuration
  4. The etcd data directory on a control plane node
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Answer: B. iptables rules and IPVS tables

kubeadm reset does not clean iptables rules or IPVS tables; those must be flushed manually, or stale Service rules will confuse the machine in its new cluster.

Source: Creating a cluster with kubeadm (Kubernetes) — Clean up › Remove the node

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