Spin up multiple Vagrant VMs

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

VAGRANTFILE_API_VERSION = "2"

$common_script = <<COMMON_SCRIPT
# Set verbose
set -v

# Set exit on error
set -e

echo -e "$(date) [INFO] Starting modified Vagrant..."

sudo yum update -y

# Install extra tools useful for troubleshooting:
sudo yum install -y bind-utils nmap tcpdump traceroute telnet mtr strace \
                    nc net-tools bash-completion

# Timestamp provision
date > /etc/vagrant_provisioned_at
COMMON_SCRIPT

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

  config.vm.box = "bento/centos-6.7"
  config.vm.synced_folder "data", "/vagrant", disabled: false

## VM: webserver ##################################################

  config.vm.define "webserver" do |webserver|
    webserver.vm.hostname = "web1.dev"
    webserver.vm.provision "shell", inline: $common_script
    webserver.vm.network "forwarded_port", guest: 80, host: 8080

    webserver.vm.provider "virtualbox" do |vbox|
      vbox.customize ["modifyvm", :id, "--memory", "4096"]
      vbox.customize ["modifyvm", :id, "--cpus", "2"]
    end
  end

## VM: dbserver ###################################################

  config.vm.define "dbserver" do |dbserver|
    dbserver.vm.hostname = "db1.dev"
    dbserver.vm.provision "shell", inline: $common_script

    dbserver.vm.provider "virtualbox" do |vbox|
      vbox.customize ["modifyvm", :id, "--memory", "4096"]
      vbox.customize ["modifyvm", :id, "--cpus", "2"]
    end
  end

###################################################################
end