main.tf

## Managed By : CloudDrove
## Copyright @ CloudDrove. All Right Reserved.

##-----------------------------------------------------------------------------
## Locals declaration
##-----------------------------------------------------------------------------
locals {
  subnet = var.specific_name_subnet == false ? length(var.subnet_names) : length(var.specific_subnet_names)
}

##-----------------------------------------------------------------------------
## Labels module callled that will be used for naming and tags.
##-----------------------------------------------------------------------------
module "labels" {
  source      = "clouddrove/labels/azure"
  version     = "1.0.0"
  name        = var.name
  environment = var.environment
  managedby   = var.managedby
  label_order = var.label_order
  repository  = var.repository
  extra_tags  = var.extra_tags
}

##-----------------------------------------------------------------------------
## Below resource will deploy subnet in your azure environment.
##-----------------------------------------------------------------------------
resource "azurerm_subnet" "subnet" {
  count                                         = var.enable ? local.subnet : 0
  name                                          = var.specific_name_subnet == false ? "${var.name}-${element(var.subnet_names, count.index)}" : var.specific_subnet_names[0]
  resource_group_name                           = var.resource_group_name
  address_prefixes                              = [var.subnet_prefixes[count.index]]
  virtual_network_name                          = var.virtual_network_name
  service_endpoints                             = var.service_endpoints
  service_endpoint_policy_ids                   = var.service_endpoint_policy_ids
  private_link_service_network_policies_enabled = var.subnet_enforce_private_link_service_network_policies
  private_endpoint_network_policies             = var.private_endpoint_network_policies
  default_outbound_access_enabled               = var.default_outbound_access_enabled
  dynamic "delegation" {
    for_each = var.delegation
    content {
      name = delegation.key
      dynamic "service_delegation" {
        for_each = toset(delegation.value)
        content {
          name    = service_delegation.value.name
          actions = service_delegation.value.actions
        }
      }
    }
  }
}

##-----------------------------------------------------------------------------
## Below resource will deploy Nat Gateway in your azure environment.
##-----------------------------------------------------------------------------
resource "azurerm_public_ip" "pip" {
  count               = var.enable && var.create_nat_gateway ? 1 : 0
  name                = format("%s-nat-gateway-ip", module.labels.id)
  allocation_method   = var.allocation_method
  location            = var.location
  resource_group_name = var.resource_group_name
  sku                 = var.sku
  tags                = module.labels.tags
}

resource "azurerm_nat_gateway" "natgw" {
  count                   = var.enable && var.create_nat_gateway ? 1 : 0
  name                    = format("%s-nat-gateway", module.labels.id)
  location                = var.location
  resource_group_name     = var.resource_group_name
  sku_name                = var.sku_name
  idle_timeout_in_minutes = var.nat_gateway_idle_timeout
  zones                   = var.zones
  tags                    = module.labels.tags
}

resource "azurerm_nat_gateway_public_ip_association" "pip_assoc" {
  count                = var.enable && var.create_nat_gateway ? 1 : 0
  nat_gateway_id       = join("", azurerm_nat_gateway.natgw[*].id)
  public_ip_address_id = azurerm_public_ip.pip[0].id
}

resource "azurerm_subnet_nat_gateway_association" "subnet_assoc" {
  count          = var.enable && var.create_nat_gateway ? local.subnet : 0
  nat_gateway_id = join("", azurerm_nat_gateway.natgw[*].id)
  subnet_id      = element(azurerm_subnet.subnet[*].id, count.index)
}

##-------------------------------------------------------------------------------------------
## Below resource will deploy Route Table in your azure environment and associate with subnet
##-------------------------------------------------------------------------------------------
resource "azurerm_route_table" "rt" {
  count                         = var.enable && var.enable_route_table ? 1 : 0
  name                          = var.route_table_name == null ? format("%s-route-table", module.labels.id) : format("%s-%s-route-table", module.labels.id, var.route_table_name)
  location                      = var.location
  resource_group_name           = var.resource_group_name
  bgp_route_propagation_enabled = var.bgp_route_propagation_enabled
  tags                          = module.labels.tags

  dynamic "route" {
    for_each = var.routes
    content {
      name                   = route.value.name
      address_prefix         = route.value.address_prefix
      next_hop_type          = route.value.next_hop_type
      next_hop_in_ip_address = lookup(route.value, "next_hop_in_ip_address", null)
    }
  }
}

resource "azurerm_subnet_route_table_association" "main" {
  count          = var.enable && var.enable_route_table ? local.subnet : 0
  subnet_id      = element(azurerm_subnet.subnet[*].id, count.index)
  route_table_id = azurerm_route_table.rt[0].id
}