Second Container registry in Terraform - terraform

Question

I have an existing terraform script where one container registry is defined. We are in the process of creating a new one with customer managed key and once its established, the old one will be deleted.
So in the terraform script I copied the same module for container registry and gave a new name. But it gave an error saying multiple entries are seen. Then I gave count=2 in container registry module. That also gave an error.
I am unable to implement customer managed key as well due to this error.
Is there a way to achieve two container registry in one terraform script?

Answer 1

Initially i tried to reproduce the same and tried to change the name
of the registry , then new one got created deleting the old registry
.It was fine.
So then I jus copied the same module next to previous one and changed
the name of reference only, without changing the registry name.Then
it threw error as , it already exists.
Note:make sure you save changes every time you modify and then do
terraform flow.
I even got error as containerregistry1 already exists even if acr01 is changed to acr03 .(as registry name is not changed here)
But when I changed registry name also.then I could successfully create other similar instances of the registry successfully.
Even tried using count=3 in container registry module which gave me the similar error.
provider "azurerm" {
features {}
}
data "azurerm_resource_group" "example" {
name = "<myResourcegroup>"
}
resource "azurerm_container_registry" "acr" {
count = 3
name = "containerkavyasarabojuRegistry01"
resource_group_name = data.azurerm_resource_group.example.name
location = data.azurerm_resource_group.example.location
sku = "Premium"
admin_enabled = false
georeplications {
location = "East US"
zone_redundancy_enabled = true
tags = {}
}
...
...
This is caused as the registry name must be unique too.Azure container registry has global scope( resources having global scope).So it must be unique globally.
So we must make sure registry name must be unique.
So along with count = x, even registry name must be varied or incremented like below:
count = 3
name =
"containerkavyasarabojuRegistry01${format("%03d", count.index + 1)}"
example:
data "azurerm_resource_group" "example" {
name = "<myresourcegroup>"
}
resource "azurerm_container_registry" "acr" {
count = 3
name = "containerkavyasarabojuRegistry01${format("%03d", count.index + 1)}" //check this
resource_group_name = data.azurerm_resource_group.example.name
location = data.azurerm_resource_group.example.location
sku = "Premium"
admin_enabled = false
...
georeplications {
...
}
...
RESULT: we can see the registries created with unique names.
You can check if acr name already exists through az cli -az acr check name before actually starting to give a name:
az acr check-name -n doesthisnameexist
Reference: terraform-modules-and-multiple-instances