I have been wanting to create a "azurerm_virtual_network" by passing location and name of the resource group attribute using data source: "azurerm_resource_group". My data source itself is created using "for_each". The idea here is, if I want to provision more VNETs in different groups, I just add more resource group names into the variable list, "var.network_rg". However, I am not able to figure out how to pass this list of values as an input to the attributes of vnet resource which is also created using for_each. The loop seems to be taking the value from resource config "for_each" instead of data source. Can anyone please help identify what is wrong here ? Is this even the correct way to achieve what I'm trying to do ? Below is my code:
child main.tf
data "azurerm_resource_group" "network_rg" {
for_each = toset(var.network_rg)
name = "${var.owner}_${var.env}_${each.key}_${var.location_short}"
}
resource "azurerm_virtual_network" "vnet" {
for_each = var.vnet
name = "${var.owner}_${var.env}_${each.value["name"]}_${var.location_short}}"
location = data.azurerm_resource_group.network_rg[each.key].location
resource_group_name = data.azurerm_resource_group.network_rg[each.key].name
address_space = each.value["address_space"]
lifecycle {
ignore_changes = [
tags["Created"]
]
}
tags = {
"Purpose" = var.purpose_tag #"Test"
}
}
child variable.tf
variable "owner" {
type = string
description = "Owner of the resource"
}
variable "network_rg" {
type = list(string)
description = "RG in which VNET is to be created"
}
variable "location" {
type = string
description = "Location in which resource group needs to be created"
}
variable "env" {
type = string
description = "Environment to be deployed in"
}
variable "location_short" {
type = string
description = "Short name for location"
}
variable "vnet" {
type = map
description = "Map of VNET attributes"
}
variable "purpose_tag" {
type = string
description = "Purpose Tag"
}
.tfvars
owner = "rrb"
location = "australiaeast"
env = "dev"
location_short = "aue"
purpose_tag = "Test"
####################### Resource Group Module ####################################
rg_name = ["platform"] #add rg name here to create more rg
###################### Network Module ############################################
network_rg = ["platform"]
vnet = {
hub_vnet = {
name = "hub"
address_space = ["10.200.0.0/16"]
}
spoke_vnet = {
name = "spoke"
address_space = ["10.201.0.0/16"]
}
}
Root main.tf
module "rg" {
source = "./modules/resourceGroup"
owner = var.owner
env = var.env
rg_name = var.rg_name
location = var.location
location_short = var.location_short
purpose_tag = var.purpose_tag
}
module "network" {
source = "./modules/network"
network_rg = var.network_rg
vnet = var.vnet
owner = var.owner
env = var.env
location = var.location
location_short = var.location_short
purpose_tag = var.purpose_tag
}
Error Message
│ Error: Invalid index
│
│ on modules/network/main.tf line 10, in resource "azurerm_virtual_network" "vnet":
│ 10: location = data.azurerm_resource_group.network_rg[each.key].location
│ ├────────────────
│ │ data.azurerm_resource_group.network_rg is object with 1 attribute "platform"
│ │ each.key is "spoke_vnet"
│
│ The given key does not identify an element in this collection value.
╵
╷
│ Error: Invalid index
│
│ on modules/network/main.tf line 10, in resource "azurerm_virtual_network" "vnet":
│ 10: location = data.azurerm_resource_group.network_rg[each.key].location
│ ├────────────────
│ │ data.azurerm_resource_group.network_rg is object with 1 attribute "platform"
│ │ each.key is "hub_vnet"
│
│ The given key does not identify an element in this collection value.
Output of for_each loop as per below suggestion
> {for idx, val in setproduct(keys(var.vnet), var.network_rg): idx => val}
{
"0" = [
"hub_vnet",
"platform",
]
"1" = [
"spoke_vnet",
"platform",
]
}
CodePudding user response:
You have to iterate over vents and network_rgs. Normally this would be done using double for loop, but in you case you could use setproduct as well.
resource "azurerm_virtual_network" "vnet" {
for_each = {for idx, val in setproduct(keys(var.vnet), var.network_rg): idx => val}
name = "${var.owner}_${var.env}_${var.vnet[each.value[0]].name}_${var.location_short}}"
location = data.azurerm_resource_group.network_rg[each.value[1]].location
resource_group_name = data.azurerm_resource_group.network_rg[each.value[1]].name
address_space = var.vnet[each.value[0]].address_space
lifecycle {
ignore_changes = [
tags["Created"]
]
}
tags = {
"Purpose" = var.purpose_tag #"Test"
}
}