Vnet and Subnet creation using terrafrom is not working

Terraform
1 
Terraform v0.12.26
    provider.azuread v0.10.0
    provider.azurerm v2.15.0
    provider.external v1.2.0
    provider.helm v0.10.5
    provider.kubernetes v1.11.3
    provider.local v1.4.0
    provider.null v2.1.2
    provider.random v2.2.1
    provider.template v2.1.2
    provider.tls v2.1.1

Terraform Configuration Files

I have 3 different configuration parts to create network and subnet:

1. Everything works, but the cluster rises in custom region network.

    esource "azurerm_virtual_network" "network" {
    name = "${var.prefix}-${var.environment}-vnet"
    address_space = var.vnet_cidr
    location = var.resource_group_location
    resource_group_name = var.resource_group_name

    subnet {
    name = "${var.prefix}-${var.environment}-subnet"
    address_prefix = var.subnet_cidr
    }
    }

Can’t use vnet_subnet_id because it’s no subnet.id for this part.

default_node_pool {
name = "default"
node_count = 1
vm_size = "Standard_D2_v3"
vnet_subnet_id = azurerm_subnet.subnet.id
}
  1. I can specify the subnet, everything rises as needed, but nginx does not expand.
    resource "azurerm_virtual_network" "network" {
    name = "${var.prefix}-${var.environment}-vnet"
    address_space = var.vnet_cidr
    location = var.resource_group_location
    resource_group_name = var.resource_group_name

resource "azurerm_subnet" "subnet" {
name = "${var.prefix}-${var.environment}-subnet"
resource_group_name = var.resource_group_name
virtual_network_name = azurerm_virtual_network.network.name
address_prefixes = var.subnet_cidr
}

default_node_pool {
name = "default"
node_count = 1
vm_size = "Standard_D2_v3"
vnet_subnet_id = azurerm_subnet.subnet.id
}
  1. The implementation of the first option through the data source, in order to get subnet_id. Terraform shows an error
    Error: Subnet "wm-test6-kubsubnet" (Virtual Network "wm-test6-vnet" / Resource Group "wm-test6") was not found.

All resources are created, uses of dependency doesn't help.

    resource "azurerm_virtual_network" "network" {
    name = "${var.prefix}-${var.environment}-vnet"
    address_space = var.vnet_cidr
    location = var.resource_group_location
    resource_group_name = var.resource_group_name

subnet {
name = "${var.prefix}-${var.environment}-subnet"
address_prefix = var.subnet_cidr
}
}

data "azurerm_resource_group" "rg" {
name = var.resource_group_name
depends_on = [azurerm_virtual_network.network]
}

data "azurerm_subnet" "k8ssubnet" {
name = "${var.prefix}-${var.environment}-kubsubnet"
virtual_network_name = azurerm_virtual_network.network.name
resource_group_name = var.resource_group_name
}

default_node_pool {
name = "default"
node_count = 1
vm_size = "Standard_D2_v3"
vnet_subnet_id = data.azurerm_subnet.k8ssubnet.id
}