$ sudo apt-get install munin

neo@monitor:~$ sudo vim /etc/munin/munin.conf
neo@monitor:~$ sudo service munin-node restart


[example.com]
        address 127.0.0.1
        use_node_name yes
        
[web2]
    address 172.16.1.2
    use_node_name yes

[web3]
    address 172.16.1.3
    use_node_name yes

[database]
    address 172.16.1.10
    use_node_name yes