K8s master节点not ready？

master上， systemctl restart  kubelet看下，
如果不行
journalctl -u kubelet看下日志报什么错
也有可能是master  网络的问题

api服务是不是正常的呀

[root@k8s-master kubernetes]# journalctl -u kubelet

-- Logs begin at Tue 2020-08-18 13:50:47 CST, end at Tue 2020-08-18 16:31:26 CST. --

Aug 18 13:58:08 k8s-master systemd[1]: Started Kubernetes Kubelet Server.

Aug 18 13:58:08 k8s-master kubelet[2585]: Flag --api-servers has been deprecated, Use --kubeconfig instead. Will be removed in a future version.

Aug 18 13:58:08 k8s-master kubelet[2585]: I0818 13:58:08.863977 2585 feature_gate.go:181] feature gates: map[]

Aug 18 13:58:08 k8s-master kubelet[2585]: W0818 13:58:08.864682 2585 server.go:605] Could not load kubeconfig file /var/lib/kubelet/kubeconfig: stat /var/lib/kubelet/kubeconfig: no such file or directory. Using default client conf

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.262180 2585 docker.go:356] Connecting to docker on unix:///var/run/docker.sock

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.262212 2585 docker.go:376] Start docker client with request timeout=2m0s

Aug 18 13:58:09 k8s-master kubelet[2585]: E0818 13:58:09.267095 2585 cni.go:163] error updating cni config: No networks found in /etc/cni/net.d

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.275445 2585 manager.go:143] cAdvisor running in container: "/system.slice/kubelet.service"

Aug 18 13:58:09 k8s-master kubelet[2585]: W0818 13:58:09.293213 2585 manager.go:151] unable to connect to Rkt api service: rkt: cannot tcp Dial rkt api service: dial tcp [::1]:15441: getsockopt: connection refused

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.303623 2585 fs.go:117] Filesystem partitions: map[/dev/sda1:{mountpoint:/boot major:8 minor:1 fsType:xfs blockSize:0} /dev/mapper/rootvg-root:{mountpoint:/ major:253 minor:0

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.307865 2585 manager.go:198] Machine: {NumCores:4 CpuFrequency:2294686 MemoryCapacity:4142161920 MachineID:06571e85e6264c8a9c9a098fdd87b052 SystemUUID:3D7E2542-5E2A-F702-FB8F

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.308427 2585 manager.go:204] Version: {KernelVersion:3.10.0-1127.18.2.el7.x86_64 ContainerOsVersion:CentOS Linux 7 (Core) DockerVersion:1.13.1 CadvisorVersion: CadvisorRevisi

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.310790 2585 kubelet.go:252] Watching apiserver

Aug 18 13:58:09 k8s-master kubelet[2585]: W0818 13:58:09.313851 2585 kubelet_network.go:69] Hairpin mode set to "promiscuous-bridge" but kubenet is not enabled, falling back to "hairpin-veth"

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.313884 2585 kubelet.go:477] Hairpin mode set to "hairpin-veth"

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.326968 2585 docker_manager.go:262] Setting dockerRoot to /var/lib/docker

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.326993 2585 docker_manager.go:265] Setting cgroupDriver to systemd

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.328314 2585 server.go:770] Started kubelet v1.5.2

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.328810 2585 server.go:123] Starting to listen on 127.0.0.1:10250

Aug 18 13:58:09 k8s-master kubelet[2585]: E0818 13:58:09.329430 2585 kubelet.go:1146] Image garbage collection failed: unable to find data for container /

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.331115 2585 fs_resource_analyzer.go:66] Starting FS ResourceAnalyzer

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.331152 2585 status_manager.go:129] Starting to sync pod status with apiserver

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.331169 2585 kubelet.go:1715] Starting kubelet main sync loop.

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.331185 2585 kubelet.go:1726] skipping pod synchronization - [container runtime is down]

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.332500 2585 volume_manager.go:244] Starting Kubelet Volume Manager

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.346535 2585 factory.go:305] Registering Docker factory

Aug 18 13:58:09 k8s-master kubelet[2585]: W0818 13:58:09.346568 2585 manager.go:247] Registration of the rkt container factory failed: unable to communicate with Rkt api service: rkt: cannot tcp Dial rkt api service: dial tcp [::1

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.346582 2585 factory.go:54] Registering systemd factory

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.346779 2585 factory.go:86] Registering Raw factory

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.346962 2585 manager.go:1106] Started watching for new ooms in manager

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.349012 2585 oomparser.go:185] oomparser using systemd

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.349815 2585 manager.go:288] Starting recovery of all containers

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.434159 2585 kubelet_node_status.go:227] Setting node annotation to enable volume controller attach/detach

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.438486 2585 kubelet_node_status.go:74] Attempting to register node 127.0.0.1

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.441564 2585 manager.go:293] Recovery completed

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.448737 2585 kubelet_node_status.go:113] Node 127.0.0.1 was previously registered

Aug 18 13:58:09 k8s-master kubelet[2585]: I0818 13:58:09.448754 2585 kubelet_node_status.go:77] Successfully registered node 127.0.0.1

Aug 18 13:59:26 k8s-master kubelet[2585]: W0818 13:59:26.698293 2585 reflector.go:319] pkg/kubelet/config/apiserver.go:44: watch of *api.Pod ended with: too old resource version: 131552 (131743)

Aug 18 13:59:26 k8s-master kubelet[2585]: W0818 13:59:26.704430 2585 reflector.go:319] pkg/kubelet/kubelet.go:378: watch of *api.Service ended with: too old resource version: 131353 (131743)

Aug 18 13:59:26 k8s-master kubelet[2585]: W0818 13:59:26.708569 2585 reflector.go:319] pkg/kubelet/kubelet.go:386: watch of *api.Node ended with: too old resource version: 131735 (131743)

Aug 18 13:59:40 k8s-master kubelet[2585]: W0818 13:59:40.021133 2585 conversion.go:110] Could not get instant cpu stats: cumulative stats decrease

Aug 18 14:00:00 k8s-master kubelet[2585]: W0818 14:00:00.104740 2585 conversion.go:110] Could not get instant cpu stats: cumulative stats decrease

Aug 18 14:00:06 k8s-master systemd[1]: Stopping Kubernetes Kubelet Server...

Aug 18 14:00:06 k8s-master systemd[1]: Stopped Kubernetes Kubelet Server.

Aug 18 14:00:09 k8s-master systemd[1]: Started Kubernetes Kubelet Server.