I'm attempting to deploy k8s "the hard way" using a terraform deployment. Please find the repo here: https://github.com/aidanSoles/kubernetes-the-hard-way-terraform

It was written using Terraform 0.11 so I elected not to upgrade the code to 0.12.

The deployment creates Google Cloud Platform virtual machines and attempts to run scripts on them.

The error message I get when applying the configuration is:

Error: Error applying plan:

2 errors occurred:
        * google_compute_instance.k8s_worker: timeout - last error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
        * google_compute_instance.k8s_controller: timeout - last error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

Here's a snippet of the google_compute_instance provisionner:

resource "google_compute_instance" "k8s_controller" {
  boot_disk {
    auto_delete = true

    initialize_params {
      image = "${var.controller_image}"
      size  = "${var.controller_size}"
    }
  }

  can_ip_forward = true
  count          = "${var.controller_count}"
  machine_type   = "${var.controller_type}"
  name           = "k8s-controller${count.index}"

  network_interface {
    access_config = {}
    subnetwork    = "${google_compute_subnetwork.k8s_subnet.name}"
  }

  metadata {
    creator = "${var.user}"
  }

  provisioner "file" {
    connection {
      private_key = "${file(var.ssh_path)}"
      user        = "${var.user}"
      type        = "ssh"
    }

    destination = "add-ssh-keys.sh"
    source      = "${var.scripts_path}/add-ssh-keys.sh"
  }
}

You could find the full script here: https://github.com/aidanSoles/kubernetes-the-hard-way-terraform/blob/master/compute.tf

I ensured that the user and ssh_path variable values are correct by doing ssh -i. I also tried adding the agent = false parameter to the file provisionner with no avail.

Any idea what could be the root of the issue? Many thanks.