google_compute_route forces new resource for next_hop_instance

[mwallman]

Terraform Version

Terraform v0.10.8

Terraform Configuration Files

resource "google_compute_route" "route" {
  name = "${var.name}-route"
  network = "${var.network}"
  dest_range = "0.0.0.0/0"
  priority = "${var.priority}"
  next_hop_instance = "${google_compute_instance.nat.self_link}"
  next_hop_instance_zone = "${var.zone}"
  tags = "${var.route_tags}"
}

Expected Behavior

Nothing, because nothing changed.

Actual Behavior

Terraform will perform the following actions:

  + google_compute_route.route
      id:                     <computed>
      dest_range:             "0.0.0.0/0"
      name:                   "us-west1-a-nat-route"
      network:                "https://www.googleapis.com/compute/v1/projects/marketo-network-dev/global/networks/dev-vpc"
      next_hop_instance:      "https://www.googleapis.com/compute/v1/projects/marketo-network-dev/zones/us-west1-a/instances/us-west1-a-nat"
      next_hop_instance_zone: "us-west1-a"
      next_hop_network:       <computed>
      priority:               "800"
      self_link:              <computed>
      tags.#:                 "1"
      tags.1668485976:        "us-west1-nat-external"

  - module.us-west1-a-nat.google_compute_route.route


Plan: 1 to add, 0 to change, 1 to destroy.

**It recreates the instance, and hence the route, on each apply

Steps to Reproduce

Please list the full steps required to reproduce the issue, for example:

1. terraform plan

[morgante]

As a temporary fix, you might be able to ignore changes either to the next_hop or the underlying instance's cloud data: https://www.terraform.io/docs/configuration/resources.html#ignore_changes

[hashibot]

This issue has been automatically migrated to hashicorp/terraform-provider-google#677 because it looks like an issue with that provider. If you believe this is not an issue with the provider, please reply to this issue and let us know.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.