kubelet重启不了

使用journalctl -xefu kubelet 查看

Jul 03 09:41:18 vm511 systemd[1]: kubelet.service failed.
Jul 03 09:41:28 vm511 systemd[1]: kubelet.service holdoff time over, scheduling restart.
Jul 03 09:41:28 vm511 systemd[1]: Stopped kubelet: The Kubernetes Node Agent.
-- Subject: Unit kubelet.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit kubelet.service has finished shutting down.
Jul 03 09:41:28 vm511 systemd[1]: Started kubelet: The Kubernetes Node Agent.
-- Subject: Unit kubelet.service has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit kubelet.service has finished starting up.
-- 
-- The start-up result is done.
Jul 03 09:41:28 vm511 kubelet[47490]: Flag --cgroup-driver has been deprecated, This parameter should be set via the config file specified by the Kubelet's --config flag. See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.
Jul 03 09:41:28 vm511 kubelet[47490]: Flag --cgroup-driver has been deprecated, This parameter should be set via the config file specified by the Kubelet's --config flag. See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:28.999985   47490 server.go:417] Version: v1.14.0
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.000402   47490 plugins.go:103] No cloud provider specified.
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.000430   47490 server.go:754] Client rotation is on, will bootstrap in background
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.006903   47490 certificate_store.go:130] Loading cert/key pair from "/var/lib/kubelet/pki/kubelet-client-current.pem".
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.063630   47490 server.go:625] --cgroups-per-qos enabled, but --cgroup-root was not specified.  defaulting to /
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.064096   47490 container_manager_linux.go:261] container manager verified user specified cgroup-root exists: []
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.064118   47490 container_manager_linux.go:266] Creating Container Manager object based on Node Config: {RuntimeCgroupsName: SystemCgroupsName: KubeletCgroupsName: ContainerRuntime:docker CgroupsPerQOS:true CgroupRoot:/ CgroupDriver:systemd KubeletRootDir:/var/lib/kubelet ProtectKernelDefaults:false NodeAllocatableConfig:{KubeReservedCgroupName: SystemReservedCgroupName: EnforceNodeAllocatable:map[pods:{}] KubeReserved:map[] SystemReserved:map[] HardEvictionThresholds:[{Signal:imagefs.available Operator:LessThan Value:{Quantity: Percentage:0.15} GracePeriod:0s MinReclaim:} {Signal:memory.available Operator:LessThan Value:{Quantity:100Mi Percentage:0} GracePeriod:0s MinReclaim:} {Signal:nodefs.available Operator:LessThan Value:{Quantity: Percentage:0.1} GracePeriod:0s MinReclaim:} {Signal:nodefs.inodesFree Operator:LessThan Value:{Quantity: Percentage:0.05} GracePeriod:0s MinReclaim:}]} QOSReserved:map[] ExperimentalCPUManagerPolicy:none ExperimentalCPUManagerReconcilePeriod:10s ExperimentalPodPidsLimit:-1 EnforceCPULimits:true CPUCFSQuotaPeriod:100ms}
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.064265   47490 container_manager_linux.go:286] Creating device plugin manager: true
Jul 03 09:41:29 vm511 kubelet[47490]: I0703 09:41:29.064326   47490 state_mem.go:36] [cpumanager] initializing new in-memory state store
Jul 03 09:41:29 vm511 kubelet[47490]: E0703 09:41:29.064519   47490 container_manager_linux.go:306] failed to initialize cpu manager: could not initialize checkpoint manager: could not restore state from checkpoint: checkpoint is corrupted
Jul 03 09:41:29 vm511 kubelet[47490]: Please drain this node and delete the CPU manager checkpoint file "/var/lib/kubelet/cpu_manager_state" before restarting Kubelet.
Jul 03 09:41:29 vm511 kubelet[47490]: F0703 09:41:29.064551   47490 server.go:265] failed to run Kubelet: could not initialize checkpoint manager: could not restore state from checkpoint: checkpoint is corrupted
Jul 03 09:41:29 vm511 kubelet[47490]: Please drain this node and delete the CPU manager checkpoint file "/var/lib/kubelet/cpu_manager_state" before restarting Kubelet.
Jul 03 09:41:29 vm511 systemd[1]: kubelet.service: main process exited, code=exited, status=255/n/a
Jul 03 09:41:29 vm511 systemd[1]: Unit kubelet.service entered failed state.
Jul 03 09:41:29 vm511 systemd[1]: kubelet.service failed.

解决方式，清空该节点：  rm -rf /var/lib/kubelet/cpu_manager_state

 systemctl start kubelet.service