...
1c- name sure internet access + NTP
1d- For multi-interface: kubeadm init --apiserver-advertise-address 192.168.
...
0.101
echo "192.168.0.101 master" >> /etc/hosts
echo "192.168.0.102 minion1" >> /etc/hosts
http://www.tothenew.com/blog/how-to-install-kubernetes-on-centos/
...