# kubeadm-config.yaml
kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta2
kubernetesVersion: v1.21.1
networking:
dnsDomain: c3.k8s.ooo
podSubnet: 2a0a:e5c0:13:e3::/64
serviceSubnet: 2a0a:e5c0:13:e4::/108