Hetzner Cloud Terraform multiple servers and datacenters

hetzner-cloud.tf

variable "hcloud_token" {}

variable "zones" {
    default = {
        zone0 = "nbg1-dc3"
        zone1 = "fsn1-dc8"
    }
}

# Configure the Hetzner Cloud Provider
provider "hcloud" {
  token = "${var.hcloud_token}"
}

# Create a web server
resource "hcloud_server" "web" {
  count = 4
  name = "web${count.index}"
  datacenter = "${lookup(var.zones, "zone${count.index % 2}")}"
  image       = "centos-7"
  server_type = "cx11"

}