Vagrantfile example with multiple machines.

Vagrantfile

# -*- mode: ruby -*-
Vagrant.configure("2") do |config|
    config.ssh.insert_key = false
    config.vm.provider "virtualbox" do |v|
        v.memory = 4096
        v.cpus = 4
    end

    config.vm.define "dc0" do |dc|
        dc.vm.box = "samba-ubuntu1604"
        dc.vm.hostname = "dc0"
        dc.vm.network "private_network", ip: "10.10.10.10"
    end
    config.vm.define "dc1" do |dc|
        dc.vm.box = "samba-ubuntu1604"
        dc.vm.hostname = "dc1"
        dc.vm.network "private_network", ip: "10.10.10.11"
    end
    config.vm.define "dc2" do |dc|
        dc.vm.box = "samba-ubuntu1604"
        dc.vm.hostname = "dc2"
        dc.vm.network "private_network", ip: "10.10.10.12"
    end

end