问题场景：
今天部署了K8S主节点，Master节点安装了Calico网络插件，在运行node列表结果是NotReady：
[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master NotReady master 22h v1.19.4获取kube-system pods 列表，dns为Pending
[root@master ~]# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-6d56c8448f-57njl 0/1 Pending 0 22h
coredns-6d56c8448f-k9nm2 0/1 Pending 0 22h
etcd-master 1/1 Running 1 22h
kube-apiserver-master 1/1 Running 1 22h
kube-controller-manager-master 1/1 Running 1 22h
kube-proxy-9dljn 1/1 Running 1 22h
kube-scheduler-master 1/1 Running 1 22h查看pod coredns-6d56c8448f-57njl 详情日志没有数据，获取pod详情有错误信息：
[root@master ~]# kubectl logs coredns-6d56c8448f-57njl -n kube-system
[root@master ~]#
[root@master ~]# kubectl describe pods coredns-6d56c8448f-57njl -n kube-system
...其他信息
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 21h (x114 over 22h) default-scheduler 0/1 nodes are available: 1 node(s) had taint {node.kubernetes.io/not-ready: }, that the pod didn't tolerate.
Warning FailedScheduling 51s (x25 over 5m2s) default-scheduler 0/1 nodes are available: 1 node(s) had taint {node.kubernetes.io/not-ready: }, that the pod didn't tolerate.
[root@master ~]#问题解决：
最终结论是：我使用的1.29.4版本。Calico官网写的最还是用版本：
- v1.27
- v1.28
- v1.29
这几个版本，那就只能卸载升级了，下面是处理过程。
首先看到的是污点，取消污点没有作用，这个是因为长时间node为NotReady，他会吧这个节点加入到污点，不在调度此node，但这恰恰是master节点。
先使用[journalctl]命令查看系统日志关于K8S的：
[root@master ~]# journalctl -f -u kubelet
-- Logs begin at 二 2024-04-30 21:01:33 CST. --
4月 30 21:11:05 master kubelet[962]: W0430 21:11:05.628506 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:11:06 master kubelet[962]: E0430 21:11:06.818698 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized
4月 30 21:11:10 master kubelet[962]: W0430 21:11:10.628945 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:11:11 master kubelet[962]: E0430 21:11:11.849882 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitializedUnable to update cni config: no networks found in /etc/cni/net.d
是说没有找到cni配置，查看了一下都没有/etc/cni/这个文件夹，证明没有安装cni网络插件。
运行k8s软件状态也能有一部分日志：
[root@master ~]# systemctl status kubelet
● kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/kubelet.service.d
└─10-kubeadm.conf
Active: active (running) since 二 2024-04-30 21:01:44 CST; 11min ago
Docs: https://kubernetes.io/docs/
Main PID: 962 (kubelet)
Tasks: 15
Memory: 116.0M
CGroup: /system.slice/kubelet.service
└─962 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni --pod...
4月 30 21:12:45 master kubelet[962]: W0430 21:12:45.637104 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:12:47 master kubelet[962]: E0430 21:12:47.223164 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: ne... uninitialized
4月 30 21:12:50 master kubelet[962]: W0430 21:12:50.637477 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:12:52 master kubelet[962]: E0430 21:12:52.250303 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: ne... uninitialized
4月 30 21:12:55 master kubelet[962]: W0430 21:12:55.637834 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:12:57 master kubelet[962]: E0430 21:12:57.269078 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: ne... uninitialized
4月 30 21:13:00 master kubelet[962]: W0430 21:13:00.638500 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:13:02 master kubelet[962]: E0430 21:13:02.299863 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: ne... uninitialized
4月 30 21:13:05 master kubelet[962]: W0430 21:13:05.638862 962 cni.go:239] Unable to update cni config: no networks found in /etc/cni/net.d
4月 30 21:13:07 master kubelet[962]: E0430 21:13:07.328870 962 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: ne... uninitialized
Hint: Some lines were ellipsized, use -l to show in full.可以清晰地看到同样的错误。 最后还是使用kubectl reset，再次init。又说不支持calico的operator.tigera.io/v1，这只能说明版本不同。
经测试，还是要换版本，calico-3.27.3 配合 K8S 的 1.28.2 没有问题本人就是这个组合。
最终只要能保证：
- 可执行文件、配置文件存在：
/opt/cni/bin/flannel下面有calico、calico-ipam
/etc/cni/net.d 下面有10-calico.conflist、calico-kubeconfig
[root@master ~]# ll /opt/cni/bin/
总用量 179860
-rwxr-xr-x 1 root root 4046172 5月 1 20:57 bandwidth
-rwxr-xr-x 1 root root 3104192 1月 19 2023 bridge
-rwxr-xr-x 1 root root 62171883 5月 1 20:57 calico
-rwxr-xr-x 1 root root 62171883 5月 1 20:57 calico-ipam
...
-rwxrwxr-x 1 root root 2491863 5月 1 21:59 flannel
...
[root@master ~]# ll /etc/cni/net.d
总用量 8
-rw-r--r-- 1 root root 679 5月 1 21:59 10-calico.conflist
-rw------- 1 root root 2741 5月 1 21:59 calico-kubeconfig- 相关pod存在，可以是ContainerCreating：
[root@master ~]# kubectl get pods -A --watch
NAMESPACE NAME READY STATUS RESTARTS AGE
calico-apiserver calico-apiserver-5f6cdcd994-6k2qh 0/1 ContainerCreating 0 47s
calico-apiserver calico-apiserver-5f6cdcd994-8rhj6 0/1 ContainerCreating 0 47s
calico-system calico-kube-controllers-56c4765c57-5h54b 1/1 Running 0 14m
calico-system calico-node-btmt7 1/1 Running 1 (2m16s ago) 14m
calico-system calico-typha-7845756587-wc2h7 1/1 Running 1 (2m16s ago) 14m
calico-system csi-node-driver-bps94 0/2 ContainerCreating 0 14m
kube-system coredns-66f779496c-s6p7r 1/1 Running 0 76m
kube-system coredns-66f779496c-zxh52 1/1 Running 0 45m
kube-system etcd-master 1/1 Running 3 (2m16s ago) 76m
tigera-operator tigera-operator-6bfc79cb9c-c25fb 1/1 Running 2 (90s ago) 14m基本就架设对了，如果还是说 cni plugin not initialized 直接重启电脑试试。
