failed to find plugin “flannel” in path [/opt/cni/bin]，k8sNotReady解决方案

问题

由于k8s安装master一直处于NotReady状态查看日志出现 failed to find plugin “flannel” in path [/opt/cni/bin]

日志信息

Nov 04 00:35:47 k8s-node1 kubelet[2814]: : [failed to find plugin "flannel" in path [/opt/cni/bin]]
Nov 04 00:35:47 k8s-node1 kubelet[2814]: W1104 00:35:47.520553    2814 cni.go:239] Unable to update cni config: no valid networks found in /etc/cni/net.d
Nov 04 00:35:48 k8s-node1 kubelet[2814]: E1104 00:35:48.764306    2814 kubelet.go:2103] Container runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized
Nov 04 00:35:52 k8s-node1 kubelet[2814]: W1104 00:35:52.524329    2814 cni.go:204] Error validating CNI config list {
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "name": "cbr0",
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "cniVersion": "0.3.1",
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "plugins": [
Nov 04 00:35:52 k8s-node1 kubelet[2814]: {
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "type": "flannel",
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "delegate": {
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "hairpinMode": true,
Nov 04 00:35:52 k8s-node1 kubelet[2814]: "isDefaultGateway": true
Nov 04 00:35:52 k8s-node1 kubelet[2814]: }
Nov 04 00:35:52 k8s-node1 kubelet[2814]: },

查看 /opt/cni/bin 缺少 flannel 

查看节点状态

kubectl get nodes

查看日志命令

journalctl -u kubelet -f

解决方案

需要下载CNI插件：CNI plugins v0.8.6

github下载地址：https://github.com/containernetworking/plugins/releases/tag/v0.8.6

(在1.0.0版本后CNI Plugins中没有flannel)

下载后通过xftp 上传到Linux /home目录解压

tar zxvf cni-plugins-linux-amd64-v0.8.6.tgz

 复制 flannel 到 /opt/cni/bin/

[root@k8s-node1 home]# cp flannel /opt/cni/bin/

查看节点状态

查看到状态立马变为Ready，至此解决问题。