node1 ansible_ssh_host={{ec2.instances[0].public_ip}} ansible_ssh_user=admin
node2 ansible_ssh_host={{ec2.instances[1].public_ip}} ansible_ssh_user=admin
node3 ansible_ssh_host={{ec2.instances[2].public_ip}} ansible_ssh_user=admin

[kube-master]
node1
node2

[kube-node]
node1
node2
node3

[etcd]
node1
node2

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