Deploying Terraform to Azure using a module and notice a warning similar to the below? In this blog post I will show how you can fix the warning
“Module module.storageaccount does not declare a provider named azurerm.storageaccount.
If you wish to specify a provider configuration for the module, add an entry for azurerm.storageaccount in the required_providers block within the module.”
Warning output:
│ Warning: Provider azurerm.storageaccount is undefined
│
│ on terraform.tf line 5, in module "storageaccount":
│ 5: azurerm.storageaccount = azurerm.storageaccount_nonprod
│
│ Module module.storageaccount does not declare a provider named azurerm.storageaccount.
│ If you wish to specify a provider configuration for the module, add an entry for azurerm.storageaccount in the required_providers block within the module.
The folder structure I will be using (note:- this is a dummy setup just to reflect the warning & how to fix)
Terraform-edit-remote-state
└── component
└── test
└── terraform.tf
└── providers.tf
└── modules
└── storageaccount
└── main.tf
File setup
providers.tf
terraform {
required_version = ">= 0.13.0"
backend "local" {}
required_providers {
azurerm = {
source = "hashicorp/azurerm"
version = "2.58.0"
}
}
}
provider "azurerm" {
features {}
skip_provider_registration = true
}
provider "azurerm" {
alias = "storageaccount_nonprod"
features {}
subscription_id = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
}
terraform.tf
module "storageaccount" {
providers = {
azurerm = azurerm
azurerm.storageaccount = azurerm.storageaccount_nonprod
}
source = "../../modules/storageaccount"
}
main.tf
data "azurerm_resource_group" "tamopsrg" {
provider = azurerm.storageaccount
name = "tamops"
}
# Create Storage Account
resource "azurerm_storage_account" "tamopssa" {
name = "thaoartowqer"
resource_group_name = data.azurerm_resource_group.tamopsrg.name
location = data.azurerm_resource_group.tamopsrg.location
account_tier = "Standard"
account_replication_type = "LRS"
}
Running the Terraform
As showed in providers.tf above, I am running the Terraform locally,
I want to use two providers, both azurerm & azurerm.storageaccount, if you review terraform.tf
providers = {
azurerm = azurerm
azurerm.storageaccount = azurerm.storageaccount_nonprod
}
If I run a Terraform Plan you will notice the warnings being flagged at the bottom of the plan
Snippet from Terraform Plan showing the warnings
Plan: 1 to add, 0 to change, 0 to destroy.
╷
│ Warning: Provider azurerm is undefined
│
│ on terraform.tf line 4, in module "storageaccount":
│ 4: azurerm = azurerm
│
│ Module module.storageaccount does not declare a provider named azurerm.
│ If you wish to specify a provider configuration for the module, add an entry for azurerm in the required_providers block within the module.
╵
╷
│ Warning: Provider azurerm.storageaccount is undefined
│
│ on terraform.tf line 5, in module "storageaccount":
│ 5: azurerm.storageaccount = azurerm.storageaccount_nonprod
│
│ Module module.storageaccount does not declare a provider named azurerm.storageaccount.
│ If you wish to specify a provider configuration for the module, add an entry for azurerm.storageaccount in the required_providers block within the module.
╵
The Resolution
Adding required_providers to my module folder
I created a file init.tf inside the storageaccount module, new file structure below
Terraform-edit-remote-state
└── component
└── test
└── terraform.tf
└── providers.tf
└── modules
└── storageaccount
└── main.tf
└── init.tf
init.tf
terraform {
required_providers {
azurerm = {
source = "hashicorp/azurerm"
configuration_aliases = [azurerm.storageaccount]
}
}
}
Now if I run a Terraform Plan, no warnings is flagged!
Plan: 1 to add, 0 to change, 0 to destroy.
Awesome – hopefully this blog assists you, if you come across this warning 🙂
Thomas Thornton 
Exactly what I was looking for, thank you!
Thank you for the comment, glad it helped!
Wonderful, much clearer than the terraform docs, thank you.
Thank you Alastair, really appreciate your comment !!