https://github.com/astrostl/vagrant-centos

vagrant-centos.sh

#!/bin/bash
(( $# < 2 )) && { echo "usage: $0 majorversion minorversion"; exit 1; }

vc_osiso="${HOME}/Downloads/CentOS-${1}.${2}-x86_64-minimal.iso"
vc_guestiso='/Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso'
vc_vboxbase="${HOME}/VirtualBox VMs"
vc_basebox="vagrant-centos-${1}-${2}"
vc_hddbase="${vc_vboxbase}/${vc_basebox}/${vc_basebox}"
vc_hddfile="${vc_hddbase}.vdi"

checkdir() { [[ ! -d "$1" ]] && { echo "ERROR: missing $1 dir!"; exit 1; } }
checkiso() { [[ ! -e "$1" ]] && { echo "ERROR: missing $1 file!"; exit 1; } }

checkdir "$HOME"
checkdir "$vc_vboxbase"
checkiso "$vc_osiso"
checkiso "$vc_guestiso"

VBoxManage -v &> /dev/null || { echo "ERROR: VBoxManage not in path!"; exit 1; }

VBoxManage createvm --name "$vc_basebox" --register
VBoxManage modifyvm "$vc_basebox" --ostype RedHat_64 --memory 512 --vram 12 --rtcuseutc on --ioapic on
VBoxManage storagectl "$vc_basebox" --name ide0 --add ide
VBoxManage storageattach "$vc_basebox" --storagectl ide0 --device 0 --port 0 --type dvddrive --medium "$vc_osiso"
VBoxManage storageattach "$vc_basebox" --storagectl ide0 --device 0 --port 1 --type dvddrive --medium "$vc_guestiso"
VBoxManage storagectl "$vc_basebox" --name sata0 --add sata --sataportcount 1
VBoxManage createhd --filename "$vc_hddbase" --size 40960
VBoxManage storageattach "$vc_basebox" --storagectl sata0 --port 0 --type hdd --medium "$vc_hddfile"
VBoxManage modifyvm "$vc_basebox" --nic1 nat
VBoxManage startvm "$vc_basebox"

ruby -rsocket -e 'puts "Kickstart URL: ks=http://" + IPSocket.getaddress(Socket.gethostname) + ":8000/vagrant-centos.ks"'
ruby -rwebrick -e 's=WEBrick::HTTPServer.new(:Port=>8000,:DocumentRoot=>".");trap("INT") { s.shutdown }; s.start'

vagrant package --base "$vc_basebox" --output "${vc_basebox}.box"

VBoxManage unregistervm "$vc_basebox" --delete