This is the vagrant and ansible configuration for a Digital Ocean droplet.
Set variable values in roles/common/vars/main.yml.
Add the following environment variables:
export DO_DROPLET_NAME='the Digital Ocean droplet name'
export DO_TOKEN='the Digital Ocean API token'
export DO_SSH_KEY_NAME='name of the Digital Ocean SSH key to use for setup'
Install the provider plugin:
$ vagrant plugin install vagrant-digitalocean
$ vagrant up --provider=digital_ocean