Basic steps with Vagrant and libvirt (KVM)

Create a basic directory:

mkdir centos
cd centos

After this command a Vagrantfile will be created in the centos directory:

vagrant init generic/centos8

Adjust the Vagrantfile to match these lines:

Vagrant.configure("2") do |config|
  config.vm.box = "generic/centos8"
  config.vm.hostname = "foohost"
  config.vm.synced_folder "/mnt/ntfs/vagrant", "/vagrant_data"
  config.vm.provider "libvirt" do |vb|
    vb.memory = "2048"
    vb.cpus = 2
  end
  config.vm.define "Centos8-demo" do |t|
  end
  config.vm.provision "shell", inline: <<-SHELL
    yum -y update
    yum -y upgrade
  SHELL
end

Launch the virtual machine:

vagrant up --provider=libvirt

SSH to it with:

vagrant ssh

Stop it:

vagrant halt

Destroy (delete all files):

vagrant destroy