Hands-on Lab·Kubernetes and Cloud Native Associate
The cgroup Driver: kubelet and containerd
The kubelet and the runtime each decide how to talk to cgroups. If they disagree the cluster half-works in ways that look like memory bugs. Two greps confirm they match.
Containers and Runtimes Guide 13 of 46 Intermediate
- Kubernetes1.36.4
- containerdv2.2.6
- runc1.3.6
- crictlv1.36.0
- TimeAbout 14 min
- Reviewed22 August 2026
Written against the versions above. containerd 2.x moved its configuration layout. Paths below are 2.x; on 1.x the same settings live under different table names.
| Server Name | IP Address | OS | Roles | CPU | RAM | HDD |
|---|---|---|---|---|---|---|
| CKA1001 | 192.168.0.175 | Ubuntu 26.04 LTS | Control Plane Node | 2 Core | 4 GB | 50 GB |
| CKA1001-NODE01 | 192.168.0.176 | Ubuntu 26.04 LTS | Worker Node | 2 Core | 4 GB | 50 GB |
Before you start
- SSH to a node with sudo.
- The runtime guide, for why containerd and the kubelet are separate programs at all.
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Both sides, one setting
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The tree they are both writing to
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What images have to do with it