[k8s]Unable to update cni config" err="no networks found in /etc/cni/net.d

1. 为kubeadm添加变量

vi /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf

Environment="KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/ --cni-bin-dir=/opt/cni/bin"

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