使用Terraform Spot-fleet请求创建的AWS竞价型实例不会返回public_ip地址

Question

我正在使用Terraform配置AWS Spot-fleet。

Spot-fleet成功配置，但是当我尝试使用ssh连接到实例以便我可以在其上运行我的Node.js应用程序（预先安装在AMI上）时出现问题。我无法检索已配置的实例的public_ip地址。

我的请求如下：

main.tf

Foo Foo Word1: bar 1x foobar 1x foo 2x bar
Foo Bar Word3: bar 2x foobar 1x foo 1x bar

这是我得到的错误：

provider "aws" {
  access_key = "${var.aws_access_key}"
  secret_key = "${var.aws_secret_key}"
  region     = "${var.aws_region}"
}

resource "aws_spot_fleet_request" "spot_fleet" {
  iam_fleet_role                      = "${var.iam_fleet_role}"
  spot_price                          = "${var.spot_price}"
  allocation_strategy                 = "${var.allocation_strategy}"
  target_capacity                     = "${var.target_capacity}"
  terminate_instances_with_expiration = "${var.terminate_instances_with_expiration}"
  valid_until                         = "${var.valid_until}"
  wait_for_fulfillment                = "${var.wait_for_fulfillment}"

  launch_specification {
    instance_type          = "${var.instance_type}"
    key_name               = "${var.key_name}"
    ami                    = "${var.ami}"
    vpc_security_group_ids = ["${var.security_group_id}"]

    root_block_device {
      volume_size = "${var.volume_size}"
      volume_type = "${var.volume_type}"
    }
  }

  provisioner "remote-exec" {
    inline = [
      "cd my-app",
      "npm install",
      "npm start",
    ]

    connection {
      host        = "${self.public_ip}"
      type        = "ssh"
      user        = "ubuntu"
      private_key = "${file("my-secret.pem")}"
      timeout     = "2m"
      agent       = false
    }
  }
}

配置的现场实例确实具有公共IP地址，我可以在AWS控制台中看到它。

我也可以使用终端SSH进入实例。