1.kubelet

#/var/lib/kubelet/config.yaml

apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 10s
evictionPressureTransitionPeriod: 20s
fileCheckFrequency: 10s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
nodeStatusReportFrequency: 30s
nodeStatusUpdateFrequency: 10s
rotateCertificates: true
runtimeRequestTimeout: 2m0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 30s
volumeStatsAggPeriod: 1m0s 
maxOpenFiles: 1000000
FeatureGates:
    RotateKubeletClientCertificate: true
    RotateKubeletServerCertificate: true
enforceNodeAllocatable:
- pods
- kube-reserved
eventBurst: 10
eventRecordQPS: 5
evictionHard:
  imagefs.available: 15%
  memory.available: 1024Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 3m0s
kubeReservedCgroup: /system.slice/kubelet.service
kubeReserved:
  cpu: "1"
  memory: 2Gi

vim /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

ExecStartPre=/bin/mkdir -p /sys/fs/cgroup/cpuset/system.slice/kubelet.service
ExecStartPre=/bin/mkdir -p /sys/fs/cgroup/hugetlb/system.slice/kubelet.service

2.docker

3.kubeapiserver

4.kubecontroler