I am unable to join the nodes to my cluster.I have created kubernetes cluster master and node in my AWS environment using terraform tool.I am able to create the Master(Kube-master) and single node(Kube-node) but my other two nodes (kude-node1 and kube-node2) were unable to join in cluster.

core@master ~ $ ./kubectl get no
NAME LABELS STATUS
10.0.0.31 kubernetes.io/hostname=10.0.0.31 Ready

core@master ~ $ ./kubectl version

Client Version: version.Info{Major:"1", Minor:"0", GitVersion:"v1.0.1", GitCommit:"6a5c06e3d1eb27a6310a09270e4a5fb1afa93e74", GitTreeState:"clean"}
Server Version: version.Info{Major:"1", Minor:"1", GitVersion:"v1.1.7", GitCommit:"e4e6878293a339e4087dae684647c9e53f1cf9f0", GitTreeState:"clean"}