From e48941cf03cdb0c1fc6a4132def92bbf9137f471 Mon Sep 17 00:00:00 2001 From: Paco Xu Date: Fri, 1 Sep 2023 13:24:53 +0800 Subject: [PATCH] update swap related description before installation --- .../tools/kubeadm/install-kubeadm.md | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md index a8ddeb5ca3d18..433e6a44cc6e9 100644 --- a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md +++ b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md @@ -26,8 +26,12 @@ see the [Creating a cluster with kubeadm](/docs/setup/production-environment/too * Full network connectivity between all machines in the cluster (public or private network is fine). * Unique hostname, MAC address, and product_uuid for every node. See [here](#verify-mac-address) for more details. * Certain ports are open on your machines. See [here](#check-required-ports) for more details. -* Swap disabled. You **MUST** disable swap in order for the kubelet to work properly. - * For example, `sudo swapoff -a` will disable swapping temporarily. To make this change persistent across reboots, make sure swap is disabled in config files like `/etc/fstab`, `systemd.swap`, depending how it was configured on your system. +* Swap configuration. The default behavior of a kubelet was to fail to start if swap memory was detected on a node. + Swap has been supported since v1.22. And since v1.28, Swap is supported for cgroup v2 only; the NodeSwap feature + gate of the kubelet is beta but disabled by default. + * You **MUST** disable swap if the kubelet is not properly configured to use swap. For example, `sudo swapoff -a` + will disable swapping temporarily. To make this change persistent across reboots, make sure swap is disabled in + config files like `/etc/fstab`, `systemd.swap`, depending how it was configured on your system.