resource "azurerm_resource_group" "main" {
  name     = local.resource_group_name
  location = var.location
  tags     = local.common_tags
}

# Dedicated VNet for the cluster. We use Azure CNI Overlay mode (set on the
# AKS cluster) so pod IPs come from `pod_cidr` rather than the VNet — the
# subnet only needs to fit nodes, not pods.
resource "azurerm_virtual_network" "main" {
  name                = "${local.name_prefix}-vnet"
  resource_group_name = azurerm_resource_group.main.name
  location            = azurerm_resource_group.main.location
  address_space       = [var.vnet_cidr]
  tags                = local.common_tags
}

resource "azurerm_subnet" "nodes" {
  name                 = "nodes"
  resource_group_name  = azurerm_resource_group.main.name
  virtual_network_name = azurerm_virtual_network.main.name
  address_prefixes     = [var.node_subnet_cidr]
}