Set `zhlsunshine` as the node name at first line of `/etc/hosts`

2001:db8:1234:5678::1 zhlsunshine

cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system

[Match]
Name=eno1

[Network]
DHCP=ipv4
Gateway=2001:db8:100:1ff:ff:ff:ff:ff
DNS=2001:41d0:3:163::1

[Address]
Address=2001:db8:1234:5678::1/64

[Route]
Destination=2001:db8:100:1ff:ff:ff:ff:ff
Scope=link

$ systemctl restart systemd-networkd
$ systemctl enable kubelet.service

$ kubeadm init --config=init-config-ipv6.yaml --dry-run | more
$ kubeadm init --config=init-config-ipv6.yaml
$ kubectl taint nodes --all node-role.kubernetes.io/master-

W0913 13:22:19.715101   24654 utils.go:69] The recommended value for "healthzBindAddress" in "KubeletConfiguration" is: 127.0.0.1; the provided value is: ::1
[init] Using Kubernetes version: v1.22.1
[preflight] Running pre-flight checks
error execution phase preflight: [preflight] Some fatal errors occurred:
	[ERROR FileContent--proc-sys-net-ipv6-conf-default-forwarding]: /proc/sys/net/ipv6/conf/default/forwarding contents are not set to 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher

$ echo 1 > /proc/sys/net/ipv6/conf/default/forwarding
$ kubectl taint nodes --all node-role.kubernetes.io/master-