Prepare hosts

DNS Setup

root@master-node:~# cat /etc/hosts
127.0.0.1 localhost
192.168.2.201 master-node
192.168.2.202 slave-node1
192.168.2.203 slave-node2
192.168.2.204 slave-node3

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Add kernel modules

root@master-node:~# cat 

…