[kube-master]
node1
node2

[all]
node1 	 ansible_ssh_host=10.90.0.2 ip=10.90.0.2
node2 	 ansible_ssh_host=10.90.0.3 ip=10.90.0.3
node3 	 ansible_ssh_host=10.90.0.4 ip=10.90.0.4

[k8s-cluster:children]
kube-node
kube-master

[kube-node]
node1
node2
node3

[etcd]
node1
node2
node3