Want support for the provisioner feature

[askfongjojo]

The provisioner feature in Terraform allows file upload to a newly created instance which is very useful for files such as key files or other large files that are too big to be included as user_data.

The feature will require also the support of $(self.external_ip) to return the IP address of the newly created instance. Here is an example of how it's used in the aws provider:

resource "aws_instance" "jumpbox" {

  ami                         = "ami-0fcf52bcf5db7b003"
  instance_type               = "m1.medium"
  key_name                    = "${var.key_name}"
  subnet_id                   = "${var.subnet_id}"
  associate_public_ip_address = true
  user_data                   = "${data.template_file.userdata.rendered}"
  vpc_security_group_ids      = ["${aws_security_group.jumpbox_sg.id}"]
  root_block_device {
    volume_type = "standard"
  }

  tags = {
    Name = "Jumpbox"
  }

    provisioner "file" {
    source      = "~/.ssh/aws.pem"
    destination = "/home/ubuntu/.ssh/id_rsa"

    connection {
      type         = "ssh"
      user         = "ubuntu"
      host         = "${self.public_ip}"
      agent        = false
      private_key  = "${file("~/.ssh/aws.pem")}"
    }
  }

}

[karencfv]

Currently the only way to retrieve external IPs is through the /v1/instances/instance/external-ips endpoint, which returns a list of IPs. This means that using that endpoint would require users to set the index of the IP to select a single one, which would be a pretty terrible experience.

Would using host_name not be enough? If it is, then this feature is already there :)