Terraform data.google_container_cluster.cluster.endpoint is null - kubernetes

Question

I would like to manage configuration for a service using terraform to a GKE cluster defined using external terraform script.
I created the configuration using kubernetes_secret.
Something like below
resource "kubernetes_secret" "service_secret" {
metadata {
name = "my-secret"
namespace = "my-namespace"
}
data = {
username = "admin"
password = "P4ssw0rd"
}
}
And I also put this google client configuration to configure the kubernetes provider.
data "google_client_config" "current" {
}
data "google_container_cluster" "cluster" {
name = "my-container"
location = "asia-southeast1"
zone = "asia-southeast1-a"
}
provider "kubernetes" {
host = "https://${data.google_container_cluster.cluster.endpoint}"
token = data.google_client_config.current.access_token
cluster_ca_certificate = base64decode(data.google_container_cluster.cluster.master_auth[0].cluster_ca_certificate)
}
when I apply the terraform it shows error message below
data.google_container_cluster.cluster.endpoint is null
Do I miss some steps here?

Answer 1

I just had the same/similar issue when trying to initialize the kubernetes provider from a google_container_cluster data source. terraform show just displayed all null values for the data source attributes. The fix for me was to specify the project in the data source, e.g.,
data "google_container_cluster" "cluster" {
name = "my-container"
location = "asia-southeast1"
zone = "asia-southeast1-a"
project = "my-project"
}
https://registry.terraform.io/providers/hashicorp/google/latest/docs/data-sources/container_cluster#project
project - (Optional) The project in which the resource belongs. If it is not provided, the provider project is used.
In my case the google provider was pointing to a different project than the one containing the cluster I wanted to get info about.
In addition, you should be able to remove the zone attribute from that block. location should refer to the zone if it is a zonal cluster or the region if it is a regional cluster.

Answer 2

I had the same problem when I wanted to start the cluster from scrach. No varible was declared then.
I solved it with depends on parameter in google_container_cluster block.
data "google_container_cluster" "my_cluster" {
name = var.project_name
depends_on = [
google_container_node_pool.e2-small
]
}
In my case the provider is waiting on nodes to be deployed. Kubernete provider starts working after the nodes are provisioned and variables are declared.

Answer 3

my problem
the name wasn't right so the data returned nothing
I tried
data "google_container_cluster" "my_cluster" {
name = "gke_my-project-name_us-central1_my-cluster-name"
location = "us-central1"
}
But the name is wrong and needs to be just my-cluster-name
And most importantly, the data directive didn't say that this cluster didn't exist --sad_beeps--
Solution (in my case): double check that the cluster exists
data "google_container_cluster" "my_cluster" {
name = "my-cluster-name"
location = "us-central1"
}
hope it will save time for someone else