Terraform azure Incompatible provider version - terraform

Question

When i'm trying to initialize terraform, i'm getting following error only with vnet module,
But terraform initilization working with azure_resource_group, azure_virtual_machine modules
Terraform 0.13 and earlier allowed provider version constraints inside the
provider configuration block, but that is now deprecated and will be removed
in a future version of Terraform. To silence this warning, move the provider
version constraint into the required_providers block.
Error: Failed to query available provider packages
Could not retrieve the list of available versions for provider
hashicorp/azure: provider registry registry.terraform.io does not have a
provider named registry.terraform.io/hashicorp/azure
If you have just upgraded directly from Terraform v0.12 to Terraform v0.14
then please upgrade to Terraform v0.13 first and follow the upgrade guide for
that release, which might help you address this problem.
Did you intend to use terraform-providers/azure? If so, you must specify that
source address in each module which requires that provider. To see which
modules are currently depending on hashicorp/azure,
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main.tf
resource "azurerm_virtual_network" "vnet" {
for_each = { for n in var.networks : n.name => n }
name = each.value.name
address_space = each.value.address_space
location = each.value.location
resource_group_name = each.value.rg_name
dynamic "subnet" {
for_each = each.value.subnets
content {
name = subnet.value.name
address_prefix = subnet.value.address_prefixes
}
}
}
variables.tf
variable networks {
type = list(object({
name = string
address_space = list(string)
rg_name = string
location = string
subnets = list(object({
name = string
address_prefixes = string
}))
}))
}
module (main.tf)
module "azurevnet"{
source = "./vnet"
networks = var.networks
}
provider.tf
provider "azurerm" {
version = "=2.37.0"
}

Answer 1

As I know, the registry terraform-providers/azure is a deprecated provider. This model will not add new things anymore and Azure already change into ARM model. So I recommend you use the terraform-providers/azurerm model only and it supports more Azure features.
Update:
And use the azurerm model, the directory structure would look like this:
main.tf
module "azurevnet" {
source = "./vnet"
networks = var.networks
}
providers.tf
provider "azurerm" {
features {}
version = "=2.37.0"
}
vnet/main.tf
variable "networks" {}
resource "azurerm_virtual_network" "vnet" {
for_each = { for n in var.networks : n.name => n }
name = each.value.name
address_space = each.value.address_space
location = each.value.location
resource_group_name = each.value.rg_name
dynamic "subnet" {
for_each = each.value.subnets
content {
name = subnet.value.name
address_prefix = subnet.value.address_prefixes
}
}
}
I only give the code for VNet, but other resources will be in the same format. And you can also do not use the providers.tf file and put the content into the main.tf file.