azurerm_container_app Argument template: volume: storage_type Does Not Use Provided Value of EmptyDir

[colinbjohnson]

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Terraform Version

1.5.0

AzureRM Provider Version

3.60.0

Affected Resource(s)/Data Source(s)

azurerm_container_app

Terraform Configuration Files

resource "azurerm_container_app" "nginx" {
  name                         = "nginx"
  container_app_environment_id = "xxx"
  resource_group_name          = azurerm_resource_group.nginx.name
  revision_mode                = "Single"
  template {
    container {
      name   = "nginx"
      image  = "nginx:latest"
      cpu    = 2.0
      memory = "4Gi"
      volume_mounts {
        path = "/var/log"
        name = "logs"
      }
    }
    volume {
      name         = "logs"
      storage_type = "EmptyDir"
    }
  }
}

### Debug Output/Panic Output

```shell
I believe the stdout/stderr output should be enough to reveal the problem

azurerm_resource_group.nginx: Refreshing state... [id=/subscriptions/x/resourceGroups/nginx]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # azurerm_container_app.nginx will be created
  + resource "azurerm_container_app" "nginx" {
      + container_app_environment_id  = "/subscriptions/x/resourceGroups/aca-prod/providers/Microsoft.App/managedEnvironments/aca-prod"
      + custom_domain_verification_id = (sensitive value)
      + id                            = (known after apply)
      + latest_revision_fqdn          = (known after apply)
      + latest_revision_name          = (known after apply)
      + location                      = (known after apply)
      + name                          = "nginx"
      + outbound_ip_addresses         = (known after apply)
      + resource_group_name           = "nginx"
      + revision_mode                 = "Single"

      + template {
          + max_replicas    = 10
          + min_replicas    = (known after apply)
          + revision_suffix = (known after apply)

          + container {
              + cpu               = 2
              + ephemeral_storage = (known after apply)
              + image             = "nginx:latest"
              + memory            = "4Gi"
              + name              = "nginx"

              + volume_mounts {
                  + name = "logs"
                  + path = "/var/log"
                }
            }

          + volume {
              + name         = "logs"
              + storage_type = "EmptyDir"
            }
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

azurerm_container_app.nginx: Creating...
╷
│ Error: creating Container App (Subscription: "x"
│ Resource Group Name: "nginx"
│ Container App Name: "nginx"): performing CreateOrUpdate: containerapps.ContainerAppsClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error: Code="ContainerAppVolumeStorageNameRequired" Message="Invalid Request: a storageName is required when creating volume 'logs' of storageType AzureFile."
│ 
│   with azurerm_container_app.nginx,
│   on main.tf line 19, in resource "azurerm_container_app" "nginx":
│   19: resource "azurerm_container_app" "nginx" {
│ 
│ creating Container App (Subscription: "x"
│ Resource Group Name: "nginx"
│ Container App Name: "nginx"): performing CreateOrUpdate: containerapps.ContainerAppsClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error:
│ Code="ContainerAppVolumeStorageNameRequired" Message="Invalid Request: a storageName is required when creating volume 'logs' of storageType AzureFile."
╵

### Expected Behaviour

I would expect that the following:

template {
container {
name = "nginx"
image = "nginx:latest"
cpu = 2.0
memory = "4Gi"
volume_mounts {
path = "/var/log"
name = "logs"
}
}
volume {
name = "logs"
storage_type = "EmptyDir"
}
}

Would create a volume of storage type `EmptyDir`.

### Actual Behaviour

I got an error as follows:

│ Container App Name: "nginx"): performing CreateOrUpdate: containerapps.ContainerAppsClient#CreateOrUpdate: Failure sending request: StatusCode=0 -- Original Error:
│ Code="ContainerAppVolumeStorageNameRequired" Message="Invalid Request: a storageName is required when creating volume 'logs' of storageType AzureFile."

### Steps to Reproduce

Using the "Terraform Configuration Files" snippet, run `terraform apply`.

### Important Factoids

_No response_

### References

_No response_

[rcskosir]

@colinbjohnson Thank you for opening this issue. I was able to reproduce it. The error message itself is interesting because you are setting the storageType to EmptyDir, not AzureFile. I'm poking around the code to see if its a error messaging issue or a logic issue.

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