Terraform: GKE Cluster with Nodes in different zones - kubernetes

Question

I have this Terraform GKE cluster with 3 nodes. When I deploy this cluster all nodes are localised in the same zones which is europe-west1-b.
gke-cluster.yml
resource "google_container_cluster" "primary" {
name = var.cluster_name
initial_node_count = var.initial_node_count
master_auth {
username = ""
password = ""
client_certificate_config {
issue_client_certificate = false
}
}
node_config {
//machine_type = "e2-medium"
oauth_scopes = [
"https://www.googleapis.com/auth/logging.write",
"https://www.googleapis.com/auth/monitoring",
]
metadata = {
disable-legacy-endpoints = "true"
}
labels = {
app = var.app_name
}
tags = ["app", var.app_name]
}
timeouts {
create = "30m"
update = "40m"
}
}
variables.tf
variable "cluster_name" {
default = "cluster"
}
variable "app_name" {
default = "my-app"
}
variable "initial_node_count" {
default = 3
}
variable "kubernetes_min_ver" {
default = "latest"
}
variable "kubernetes_max_ver" {
default = "latest"
}
variable "remove_default_node_pool" {
default = false
}
variable "project" {
default = "your-project-name"
}
variable "credentials" {
default = "terraform-key.json"
}
variable "region" {
default = "europe-west1"
}
variable "zone" {
type = list(string)
description = "The zones to host the cluster in."
default = ["europe-west1-b", "europe-west1-c", "europe-west1-d"]
}
And would like to know if it's possible to deploy each node in a different zone.
If yes how can I do it using Terraform?

Answer 1

Simply add the following line
resource "google_container_cluster" "primary" {
name = "cluster"
location = "us-central1"
initial_node_count = "3"
in order to create a regional cluster. The above will bring up 9 nodes with each zone (f a b) containing 3 nodes. If you only want 1 node per zone, then just change initial_node_count to 1.
More info here at Argument reference.