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kubeadm: update docs about configuring cgroup driver used by kubelet on control-plane node

This commit is contained in:
SataQiu 2020-04-28 21:33:12 +08:00
parent 9219c9b766
commit f150906094
1 changed files with 12 additions and 8 deletions
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20
content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md
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@ -266,21 +266,25 @@ kubeadm to tell it what to do.
## Configure cgroup driver used by kubelet on control-plane node
When using Docker, kubeadm will automatically detect the cgroup driver for the kubelet
and set it in the `/var/lib/kubelet/kubeadm-flags.env` file during runtime.
and set it in the `/var/lib/kubelet/config.yaml` file during runtime.
If you are using a different CRI, you have to modify the file
`/etc/default/kubelet` (`/etc/sysconfig/kubelet` for CentOS, RHEL, Fedora) with your `cgroup-driver` value, like so:
If you are using a different CRI, you have to modify the file with your `cgroupDriver` value, like so:
```bash
KUBELET_EXTRA_ARGS=--cgroup-driver=<value>
```yaml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
cgroupDriver: <value>
```
This file will be used by `kubeadm init` and `kubeadm join` to source extra
user defined arguments for the kubelet.
Please mind, that you **only** have to do that if the cgroup driver of your CRI
is not `cgroupfs`, because that is the default value in the kubelet already.
{{< note >}}
Since `--cgroup-driver` flag has been deprecated by kubelet, if you have that in `/var/lib/kubelet/kubeadm-flags.env`
or `/etc/default/kubelet`(`/etc/sysconfig/kubelet` for RPMs), please remove it and use the KubeletConfiguration instead
(stored in `/var/lib/kubelet/config.yaml` by default).
{{< /note >}}
Restarting the kubelet is required:
```bash