title: Packer: Generate AMI from a running EC2 Instance
body: <p>I woud like to create an AMI (Amazon Machine Image) from a running EC2 instance using Packers.. <br></p>
  
  <p>Here is my usecase:<br>
  1) Use packer to generate the base AMI and start the EC2 instance <br>
  2) Have user data configuration on the EC2 instance.. (Human Intervention needed here) <br>
  3) Generate an app specific AMI from step#2 using Packer  <br>
  <br>
  I don't want to use the "provisioner" provided by packers. I need a human intervention at step#2<br>
  <br></p>