Terraform kubectl provider error: failed to created kubernetes rest client for read of resource - kubernetes

Question

I have a Terraform config that (among other resources) creates a Google Kubernetes Engine cluster on Google Cloud. I'm using the kubectl provider to add YAML manifests for a ManagedCertificate and a FrontendConfig, since these are not part of the kubernetes or google providers.
This works as expected when applying the Terraform config from my local machine, but when I try to execute it in our CI pipeline, I get the following error for both of the kubectl_manifest resources:
Error: failed to create kubernetes rest client for read of resource: Get "http://localhost/api?timeout=32s": dial tcp 127.0.0.1:80: connect: connection refused
Since I'm only facing this issue during CI, my first guess is that the service account is missing the right scopes, but as far as I can tell, all scopes are present. Any suggestions and ideas are greatly appreciated!

Answer 1

The provider trying to connect with localhost, which means either to you need to provide a proper kube-config file or set it dynamically in the terraform.
Although you didn't mention how are setting the auth, but here is two way
Poor way
resource "null_resource" "deploy-app" {
provisioner "local-exec" {
interpreter = ["/bin/bash", "-c"]
command = <<EOT
kubectl apply -f myapp.yaml ./temp/kube-config.yaml;
EOT
}
# will run always, its bad
triggers = {
always_run = "${timestamp()}"
}
depends_on = [
local_file.kube_config
]
}
resource "local_file" "kube_config" {
content = var.my_kube_config # pass the config file from ci variable
filename = "${path.module}/temp/kube-config.yaml"
}
Proper way
data "google_container_cluster" "cluster" {
name = "your_cluster_name"
}
data "google_client_config" "current" {
}
provider "kubernetes" {
host = 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
)
}
data "kubectl_file_documents" "app_yaml" {
content = file("myapp.yaml")
}
resource "kubectl_manifest" "app_installer" {
for_each = data.kubectl_file_documents.app_yaml.manifests
yaml_body = each.value
}
If the cluster in the same module , then provider should be
provider "kubernetes" {
load_config_file = "false"
host = google_container_cluster.my_cluster.endpoint
client_certificate = google_container_cluster.my_cluster.master_auth.0.client_certificate
client_key = google_container_cluster.my_cluster.master_auth.0.client_key
cluster_ca_certificate = google_container_cluster.my_cluster.master_auth.0.cluster_ca_certificate
}

Answer 2

Fixed the issue by adding load_config_file = false to the kubectl provider config. My provider config now looks like this:
data "google_client_config" "default" {}
provider "kubernetes" {
host = "https://${endpoint from GKE}"
token = data.google_client_config.default.access_token
cluster_ca_certificate = base64decode(CA certificate from GKE)
}
provider "kubectl" {
host = "https://${endpoint from GKE}"
token = data.google_client_config.default.access_token
cluster_ca_certificate = base64decode(CA certificate from GKE)
load_config_file = false
}