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CKA study material · question 83 of 1000

Which two statements about cgroup drivers in a kubeadm cluster are correct? Choose two.

  1. cgroupfs is the kubelet's default driver
  2. The driver is selected automatically from the kernel version
  3. The kubelet and the container runtime must use the same driver
  4. cgroupfs is recommended when systemd is the init system
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Answer: C. The kubelet and the container runtime must use the same driver
A. cgroupfs is the kubelet's default driver

A mismatched cgroup driver breaks the node; cgroupfs is the kubelet default, but a systemd host wants systemd.

Source: Container Runtimes (Kubernetes) — cgroup drivers

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