CPU Management Policies for RKE2

[mittasau]

I am trying to set up CPU management policies on RKE-2 node (intel NUC quad core i7 8th gen), but changes are not visible after server restart. I want to change policy from "none" to "static"

We might be missing something.
Following Reference - https://kubernetes.io/docs/tasks/administer-cluster/cpu-management-policies/#static-policy

Changes were made to /etc/rancher/rke2/config.yaml.
Following entries were added.

cpu-manager: true
cpu-manager-policy: static
cpu-manager-policy-options: full-pcpus-only=true
cpu-manager-reconcile-period: 0s
kube-reserved: cpu=1
system-reserved: cpu=1

**_After the changes and rke2-server restart, we are checking the CPU state at /var/lib/kubelet/cpu_manager_state

"policyName":"none","defaultCpuSet":"","checksum":1353318690}_**

I assume policy name should be static here if changes were applied correctly.

Could anyone please help how rke2 can apply these changes and how can we test it once done ?

[brandond]

Assuming those are all kubelet args, what you want would look something like this:

kubelet-arg:
  - "cpu-manager=true"
  - "cpu-manager-policy=static"
  - "cpu-manager-policy-options=full-pcpus-only=true"
  - "cpu-manager-reconcile-period=0s"
  - "kubelet-reserved=cpu=1"
  - "system-reserved=cpu=1"

If you want to pass arguments to a specific Kubernetes component, you need to put them in the arg list for that component, not just directly as rke2 config.

[jokuniew]

err="failed to parse kubelet flag: unknown flag: --cpu-manager"
err="failed to parse kubelet flag: unknown flag: --kubelet-reserved"

I've removed cpu-manager arg and replacedkubelet-reserved to kube-reserved and it works like a charm 👍🏼

Kubernetes 1.28 on RKE2

[mittasau]

Thanks! It is working.