#Put this in playbook
- hosts: crispy.live
  <<playbook contents here>>

#Create hosts file
[crispy.live]
ubuntu@server.com ansible_ssh_private_key_file=./tempcrispy.pem

#Change permission of host file
sudo chmod 600 /path/to/my/key.pem

#Run ansible
ansible-playbook -i hosts ./ansible/playbook.yml