有人详细说过这个问题
https://canthonyscott.com/high-idle-cpu-usage-of-k3s-continuously-increases/
k3s 官网关于这个问题的谈论
https://github.com/k3s-io/k3s/issues/294?ref=canthonyscott.com
https://github.com/k3s-io/k3s/issues/2375?ref=canthonyscott.com
解决
kubectl get ns 发现有很多卡在删除状态的 ns
执行如下脚本删除掉这些 ns
for ns in `kubectl get ns|grep Terminating|awk