How to use output value in same root module for creating another resource

Terraform
1

Objective : How to use output value of one resource created and use that for creating another resource in same root module
What I tried:

resource "azurerm_virtual_network" "vnet" {
  name                = var.hub_vnet_name
  location            = azurerm_resource_group.rg[0].location
  resource_group_name = azurerm_resource_group.rg[0].name
  for_each = {for k,v in var.vnet_address_space: k=>v if k == "${var.env}"}
  address_space       =  each.value
  dns_servers         = var.dns_servers
  tags     = {
    environment = "${var.env}"
    costcentre = "14500"
  }
  dynamic "ddos_protection_plan" {
    for_each = local.if_ddos_enabled

    content {
      id     = azurerm_network_ddos_protection_plan.ddos[0].id
      enable = false
    }
  }
}

output "azurerm_vnets_names" {
    value = values(azurerm_virtual_network.vnet)[*].name
             
}

Till above point its working and I see output of as

Outputs:

azurerm_vnets_names = [
  "vnet-hub",
]

Now as next step I am trying to create Subnets in loop as below

tfvars.json:

"subnets" : {
        "Dev" :
        [  
        {"gw_snet":{
          "name"                 : "GatewaySubnet",
          "address_prefixes"     : ["10.1.1.0/24"]
        },
        "dns-snet" : {
          "name"                 : "InboundDNSSubnet",
          "address_prefixes"     : ["10.1.2.0/24"]
        },
        "common_snet" : {
          "name"                 : "Common",
          "address_prefixes"     : ["10.1.3.0/24"]
        },
        "clientdata_snet" : {
          "name"                 : "ClientDataSubnet",
          "address_prefixes"     : ["10.1.4.0/20"]
        }}
        ],
        "Stage" :
        [  
        {"gw_snet":{
          "name"                 : "GatewaySubnet",
          "address_prefixes"     : ["10.2.1.0/24"]
        },
        "dns-snet" : {
          "name"                 : "InboundDNSSubnet",
          "address_prefixes"     : ["10.2.2.0/24"]
        },
        "common_snet" : {
          "name"                 : "Common",
          "address_prefixes"     : ["10.2.3.0/24"]
        },
        "clientdata_snet" : {
          "name"                 : "ClientDataSubnet",
          "address_prefixes"     : ["10.2.4.0/20"]
        }}
        ],
        "Prod" :
        [  
        {"gw_snet":{
          "name"                 : "GatewaySubnet",
          "address_prefixes"     : ["10.3.1.0/24"]
        },
        "dns-snet" : {
          "name"                 : "InboundDNSSubnet",
          "address_prefixes"     : ["10.3.2.0/24"]
        },
        "common_snet" : {
          "name"                 : "Common",
          "address_prefixes"     : ["10.3.3.0/24"]
        },
        "clientdata_snet" : {
          "name"                 : "ClientDataSubnet",
          "address_prefixes"     : ["10.3.4.0/20"]
        }}
        ]
      }

In my main.tf:

locals {
   net_subnets = merge([
    for env, network in var.subnets : {
      for k, v in network[0] :
      "${k}-${v.name}" => {
        subnet_name      = v.name
        address_prefixes = v.address_prefixes
      } if env == "Dev"
  }]...)
}


#Creating subnets

resource "azurerm_subnet" "mysubnet" {
  for_each             = local.net_subnets
  name                 = each.value.subnet_name
  address_prefixes     = each.value.address_prefixes
  virtual_network_name = azurerm_virtual_nework.vnet.name
  resource_group_name  = var.resource_group_name
}

Now below line is erroring out

virtual_network_name = azurerm_virtual_nework.vnet[var.env].name


I am getting error below

│ A managed resource "azurerm_virtual_nework" "vnet" has not been declared in the root module.

I am not using any modules, I putting all code in root only.

Please help me to identify issue

2

You have misspelt “network” as “nework”

1 Like
3

oh my bad… struggling for hour with this silly mistake let me try