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K8s Dual Stack Kubeadm configuration
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kubeadm-dual-stack.md

Valid configuration example:

apiVersion: kubeadm.k8s.io/v1beta2
featureGates:
  IPv6DualStack: true
kind: ClusterConfiguration
networking:
  podSubnet: 10.10.0.0/16,2001:db8::/98
  serviceSubnet: 10.96.0.0/12,2001:db8:9999::/112

apiVersion: kubeadm.k8s.io/v1beta2
featureGates:
  IPv6DualStack: true
kind: ClusterConfiguration
networking:
  podSubnet: 192.168.64.0/20,fc00::/48
  serviceSubnet: 192.168.128.0/22,fe00::/108
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