azurerm_container_app: Support for subPath in volumeMounts

Trueber commented 1 year ago

Is there an existing issue for this?

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Description

Azure Container Apps does support mounting from a subpath in a volume to a container app, but azurerm_container_app does currently not support this.

(From https://learn.microsoft.com/en-us/azure/templates/microsoft.app/containerapps?pivots=deployment-language-arm-template#resource-format-2):

"volumeMounts": [
  {
    "mountPath": "string",
    "subPath": "string",
    "volumeName": "string"
  }
]```
subPath: Path within the volume from which the container's volume should be mounted. Defaults to "" (volume's root).

### New or Affected Resource(s)/Data Source(s)

azurerm_container_app

### Potential Terraform Configuration

```hcl
resource "azurerm_container_app" "my_container_app" {
  ...
  template {
    volume {
      name         = "vol_name"
      storage_name = "storage_name"
      storage_type = "AzureFile"
    }
    container {
      ...
      volume_mounts {
        name     = "vol_name"
        sub_path = "sub-dir-for-this-container"
        path     = "/mnt/mounted"
      }
    }
  }
}