In your shell clone the following repositories and download virtletctl binary:
git clone https://github.com/lukaszo/virtlet-101
cd virtlet-101
git clone https://github.com/Mirantis/virtlet.git
chmod 600 virtlet/examples/vmkey
wget https://github.com/Mirantis/virtlet/releases/download/v1.2.0/virtletctl
chmod +x virtletctl