k3s: option 'kubelet-args' doesn't work when restart node

Environmental Info: K3s Version:

k3s version v1.22.7+k3s1 (8432d7f2) go version go1.16.10

Node(s) CPU architecture, OS, and Version:

Linux data-api-test 4.4.0-177-generic #207-Ubuntu SMP Mon Mar 16 01:16:10 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Cluster Configuration:

1 server 0 agent

Describe the bug:

kubelet-args doesn’t work when restart server node by script , only work when uninstall server node then reinstall it

Steps To Reproduce:

1. install server node curl -sfL https://get.k3s.io/ | sh -
2. use kubectl describe node can see Capacity is equal to Allocatable
3. make a /home/wzp/config.yaml like blow

kubelet-arg=kube-reserved: "cpu=500m,memory=1Gi,ephemeral-storage=2Gi"
kubelet-arg=system-reserved: "cpu=500m, memory=1Gi,ephemeral-storage=2Gi"
kubelet-arg=eviction-hard: "memory.available<500Mi,nodefs.available<10%"

1. restart server node curl -sfL https://get.k3s.io/ | K3S_CONFIG_FILE=/home/wzp/config.yaml sh -
2. use kubectl describe node can see Capacity is still equal to Allocatable

but if you uninstall server node and reinstall with config.yaml, these reservation options would work

Expected behavior:

restart node by curl -sfL https://get.k3s.io/ | K3S_CONFIG_FILE=/home/wzp/config.yaml -, the reservation options can work

Actual behavior:

restart node by curl -sfL https://get.k3s.io/ | K3S_CONFIG_FILE=/home/wzp/config.yaml -, the reservation options don’t work

Additional context / logs:

Backporting

• Needs backporting to older releases