Terraform Azure AKS internal load balancer

1/22/2020

I deployed an Azure AKS cluster via the following terraform statements into an existing vnet. It worked, the AKS cluster is created with an Azure load balancer and an public IP address assigned to it. I need a setup with an internal Azure load balancer only. How do I have to change the terraform code to only get an internal Azure load balancer? Thanks

resource "azurerm_kubernetes_cluster" "aks" {

  name = "${var.tags.department}-${var.tags.stage}-${var.tags.environment}_aks"

  location = var.location

  resource_group_name = azurerm_resource_group.aksrg.name

  dns_prefix = lower("${var.tags.department}-${var.tags.stage}-${var.tags.environment}-aks")

  private_link_enabled = true

  node_resource_group =     "${var.tags.department}-${var.tags.stage}-${var.tags.environment}_aks_nodes_rg"

  linux_profile {

    admin_username = "testadmin"

  ssh_key {

    key_data = file("/ssh/id_rsa.pub") #ssh-keygen

    }

  }

  default_node_pool {

    name = "default"

    vm_size = "Standard_DS1_v2"

    enable_auto_scaling = false

    enable_node_public_ip = false

    node_count = 1

    vnet_subnet_id = azurerm_subnet.akssubnet.id

  }

  network_profile {

    network_plugin = "azure"

    service_cidr = "172.100.0.0/24"

    dns_service_ip = "172.100.0.10"

    docker_bridge_cidr = "172.101.0.1/16"

    load_balancer_sku = "standard"

  }

  service_principal {

    client_id = azurerm_azuread_service_principal.aks_sp.application_id

    client_secret = azurerm_azuread_service_principal_password.aks_sp_pwd.value

  }



addon_profile {

    kube_dashboard {

      enabled = true

   }

}

  role_based_access_control {

    enabled = false

  }

}
-- Christian Schroeder
azure
azure-aks
kubernetes
terraform
terraform-provider-azure

1 Answer

1/29/2020

For your issue, you can see that you set the network_profile of the AKS cluster like this:

network_profile {

    network_plugin = "azure"

    service_cidr = "172.100.0.0/24"

    dns_service_ip = "172.100.0.10"

    docker_bridge_cidr = "172.101.0.1/16"

    load_balancer_sku = "standard"

  }

And you set the property load_balancer_sku, it will create a standard type Load Balancer for you. And this property only can use the value basic and standard. So it seems it's impossible to create the AKS cluster without a Load Balancer. And you can see the issue in Github. As it said, the newest CLI also cannot help you achieve that.

If you have more questions about this issue, please let me know. I'm glad if I can help you solve the problem.

-- Charles Xu
Source: StackOverflow