NETWORK.md

Cluster VM

config host-only in adaptor 2

192.168.56.1
255.255.255.0

config VM /etc/network/interfaces

auto eth1
iface eth1 inet static
address 192.168.56.101
netmask 255.255.255.0
network 192.168.56.0
broadcast 192.168.56.255

add /etc/hosts

192.168.56.101    myserver1
192.168.56.102    myserver2

restart eth1 or reboot

ifdown eth1
ifup eth1

Centos minimal running on Virtualbox

vi /etc/sysconfig/network-scripts/ifcfg-eth0

change to

NM_CONTROLLED="NO"
ONBOOT="YES"
BOOTPROTO="dhcp"