Terraform-provider-google: mapping external ip to compute node

[hashibot]

_This issue was originally opened by @alexandershelega as hashicorp/terraform#16095. It was migrated here as a result of the provider split. The original body of the issue is below._

---

Hi guys, i want to create static ip and map it to host, address was create successfully, and i see it in google console, but when i try to create compute node i receive this error.

google_compute_instance.gcp-test-ip: Error creating instance: googleapi: Error 400: Invalid value for field 'resource.networkInterfaces[0].accessConfigs[0].natIP': 'gcp-test-ip'. The specified external IP address 'gcp-test-ip' was not found in region 'us-east1'., invalid

my terrafor config

resource "google_compute_address" "gcp-test-ip" {
  name = "gcp-test-ip"
  region = "us-east1"
}

resource "google_compute_instance" "gcp-test-ip" {
  name         = "gcp-test-ip"
  machine_type = "custom-2-2048"
  zone         = "us-east1-c"

  boot_disk {
    initialize_params {
      image = "ubuntu-1404-trusty-v20170818"
      size  = 30
    }
  }

  network_interface {
    network = "default"

        access_config {
          // Ephemeral IP
          nat_ip = "${google_compute_address.gcp-test-ip.name}"
        }
  }
}

[danawillow]

Hey @alexandershelega, you want to use the address property rather than the name property, so your config should look like:
nat_ip = "${google_compute_address.gcp-test-ip.address}" instead. I'm going to go ahead and close this issue but let me know if that doesn't work and I'll reopen it!

[Na-Sathish]

Hi,
I also have a couple of issues in network_interface while creating a compute engine in GCP using terraform.
Issue-1:
Error: google_compute_instance.virtual_instance: Error creating network interfaces: exactly one of network or subnetwork must be provided

network_interface {
    network = "test-vpc" // Custom VPC
    subnetwork = "${var.subnet_self_link}"
    access_config {}
}

Then I comment out subnetwork and run `terraform apply` with below code is also giving error.

network_interface {
    network = "test-vpc" // Custom VPC
    //subnetwork = "${var.subnet_self_link}"
    access_config {}
  }

Error: google_compute_instance.virtual_instance: Error creating instance: googleapi: Error 400: Invalid value for field 'resource.networkInterfaces[0]': ''. Subnetwork should be specified for custom subnetmode network, invalid

Then I comment out network and run terraform for below code is working fine. And also when I used a default VPC it's working fine.

network_interface {
    //network = "test-vpc" // Custom VPC
    subnetwork = "${var.subnet_self_link}"
    access_config {}
  }
network_interface {
    network = "default" // Default VPC
    //subnetwork = "${var.subnet_self_link}"
    access_config {}
  }

Issue-2:
Error: google_compute_instance.virtual_instance: Error creating instance: googleapi: Error 400: Invalid value for field 'resource.networkInterfaces[0].accessConfigs[0].natIP': '10.160.0.2'. The specified external IP address '10.160.0.2' was not found in region 'asia-south1'., invalid

network_interface {
            subnetwork = "${var.subnet_self_link}"
            access_config {
                 nat_ip = "${google_compute_address.static.address}"
             }
  }
resource "google_compute_address" "static" {
  name = "${var.private_ip_name}"
  address_type = "INTERNAL"
  region = "asia-south1" 
}

  With the Same thing, I modified the above code and run terraform with below config getting the same error.

```network_interface {
network = "test-vpc" // Custom VPC
access_config {
nat_ip = "${google_compute_address.static.address}"
}
}
resource "google_compute_address" "static" {
name = "${var.private_ip_name}"
address_type = "INTERNAL"
region = "asia-south1"
}

Then i tired with defaut VPC and nat_ip. it's working fine.

network_interface {
network = "default"
access_config {
nat_ip = "${google_compute_address.static.address}"
}
}
resource "google_compute_address" "static" {
name = "${var.private_ip_name}"
address_type = "INTERNAL"
region = "asia-south1"
}
```
Questions:

1. Why when i use custom VPC getting error?
2. Why nat_ip is giving error through terraform? when i tired in console it's working fine.

[danawillow]

Hey @Na-Sathish, you should specify the subnetwork you'd like the address created in in the google_compute_address resource.

(Also in the future, if you're experiencing an issue I'd recommend filing a new issue or finding an existing open one. I happened to get an email about this one because I was subscribed to it, but we don't have people regularly looking at issue that have already been closed)

[Na-Sathish]

Hi @danawillow,
Yeah, I tried with below code also giving the same error,

resource "google_compute_address" "static" {
  name = "${var.kafka_private_ip_name}"
  subnetwork = "${var.subnet_self_link}"
  address_type = "INTERNAL"
  region = "asia-south1" 
}  
network_interface {
    subnetwork = "${var.subnet_self_link}"
    access_config {
      nat_ip = "${google_compute_address.static.address}"
    }
}

Error:

• google_compute_instance.virtual_instance: Error creating instance: googleapi: Error 400: Invalid value for field 'resource.networkInterfaces[0].accessConfigs[0].natIP': '10.11.0.2'. The specified external IP address '10.11.0.2' was not found in region 'asia-south1'., invalid

Terraform Info after Creating google_compute_address :

network_interface.#:                                 "" => "1"
network_interface.0.access_config.#:                 "" => "1"
network_interface.0.access_config.0.assigned_nat_ip: "" => "<computed>"
network_interface.0.access_config.0.nat_ip:          "" => "10.11.0.2"
network_interface.0.access_config.0.network_tier:    "" => "<computed>"
network_interface.0.address:                         "" => "<computed>"
network_interface.0.name:                            "" => "<computed>"
network_interface.0.network_ip:                      "" => "<computed>"
network_interface.0.subnetwork:                      "" => "projects/test-project/regions/asia-south1/subnetworks/test-subnet"
network_interface.0.subnetwork_project:              "" => "<computed>"

[Chupaka]

@Na-Sathish, your google_compute_address creates internal address. If you need external address, remove subnetwork, address_type and region from the resource.

[hashibot[bot]]

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