问题1：To see the stack trace of this error execute with --v=5 or higher

这是因为服务器的内存及处理器内核总数配置过低导致，需要提升配置

问题2：/proc/sys/net/bridge/bridge-nf-call-iptables does not exist

解决方法

modprobe br_netfilter
echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
echo 1 > /proc/sys/net/ipv4/ip_forward

问题3：failed to connect: failed to connect: context deadline exceeded

cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables=1
net.ipv4.ip_forward=1
net.bridge.bridge-nf-call-ip6tables=1
EOF

问题4：error execution phase upload-config/kubelet: Error writing Crisocket information for the control-plane node: nodes "k8s-master" not found

解决方法

swapoff -a
kubeadm reset
systemctl daemon-reload
systemctl restart kubelet
iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X