Terraform Azure AKS Cluster not exporting kubeconfig file - azure

Question

I am trying to provision a kubernetes cluster on Azure (AKS) with Terraform. The provisioning works quite well but I can't get the kubeconfig from kube_config_raw exported to a file.
Below is my main.tf and outputs.tf. I supressed the resource_group and user_assigned_identity resources.
This is a resource I used for creating the configuration: https://learnk8s.io/terraform-aks
main.tf
terraform {
required_providers {
azurerm = {
source = "hashicorp/azurerm"
version = ">=2.79.1"
}
}
}
provider "azurerm" {
features {}
subscription_id = "..."
}
resource "azurerm_kubernetes_cluster" "aks" {
name = "myCluster"
location = azurerm_resource_group.rg.location
resource_group_name = azurerm_resource_group.rg.name
dns_prefix = "my-cluster-dns"
default_node_pool {
name = "agentpool"
node_count = 1
os_disk_size_gb = 64
vm_size = "Standard_B2ms"
}
identity {
type = "UserAssigned"
user_assigned_identity_id = azurerm_user_assigned_identity.user_assigned_identity.id
}
depends_on = [
azurerm_user_assigned_identity.user_assigned_identity
]
}
outputs.tf - I've tried "./kubeconfig" and "kubeconfig" in the filename but nothing gets exported anywhere
resource "local_file" "kubeconfig" {
depends_on = [azurerm_kubernetes_cluster.aks]
filename = "./kubeconfig"
content = azurerm_kubernetes_cluster.aks.kube_config_raw
}
Bonus: is it possible to export it directly to the existing ~/.kube/config file? Like the az aks get-credentials command does?

Answer 1

outputs.tf - I've tried "./kubeconfig" and "kubeconfig" in the
filename but nothing gets exported anywhere
I tested the same code that you have and did terraform-apply , it saved the local file to the location where the apply was performed.
For example:
If I ran the main.tf file from C:\Users\user\terraform\aksconfig> as its present there then the kubeconfig file gets saved in the same path .
Output:
Bonus: is it possible to export it directly to the existing ~/.kube/config file? Like the az aks get-credentials command does?
Path where the az aks get-credentials --resource-group myresourcegroup --name myCluster stores the config file:
Code to save the script in the same path as az command:
resource "local_file" "kubeconfig" {
depends_on = [azurerm_kubernetes_cluster.aks]
filename = "C:/Users/user/.kube/config" this is where the config file gets stored
content = azurerm_kubernetes_cluster.aks.kube_config_raw
}
Output:
Exisitng config file in /.kube/config
New File overwrites the existing file :
Note: Using local_file block here will completely overwrite the file not appending the context to the previous one . If you are looking for merging the content in a single file like az command does , then its not possible from terraform.