Install VirtualBox and Vagrant.

Add ansible to your PC. For example,

$ brew install ansible

Add the following to your ~/.ssh/config

Host melody
  HostName 127.0.0.1
  User vagrant
  Port 2222
  UserKnownHostsFile /dev/null
  StrictHostKeyChecking no
  PasswordAuthentication no
  IdentityFile "~/.vagrant.d/insecure_private_key"
  IdentitiesOnly yes

Boot vagrant

$ vagrant up

Check to be able to execute ssh command.

$ ssh melody

Checking

$ ansible-playbook -C server.yml

Do ansible!

$ ansible-playbook server.yml