VM Provisioning Failures Investigation

Overview

As of Jan 2026, VM creation is failing on the environment due to a backend error in the Cloud Director / Nubes platform.

Technical Details

The "String[] to GUID" Crash

The server returns a ColdFusion error indicating a type mismatch during parameter validation.

Error Log:

"detail": "The value String [] cannot be converted to a value of type [guid].",
"message": "Cannot cast String [] to a value of type [guid]",
"rootCause": {
    "message": "Invalid call of the function [checkParam]",
    ...
}

Failure Stage

Using detailed HAR capture and analysis (analyze_har_vm.py), we identified the exact workflow step where the crash occurs.

Workflow:

vm.create (Success)
vm.config_network (Success)
vm.configure_vip (Success)
vm.fw_rules -> FAILURE

HAR Extract:

{
  "stage": "Работа с сервисом",
  "stageMsg": "Добавление правил FW",
  "isSuccessful": false
}

Provider Verification

We performed a code audit to ensure the Terraform Provider was not accidentally sending a malformed "list of strings" where a GUID was expected.

File: internal/provider/vm_resource.go
Function: submitVMOperationParams
Finding: The provider sets SvcOperationCfsParamId (int) and ParamValue (string). It specifically omits optional GUID fields. Use of analyze_har_vm.py on the HTTP dump verified that the request payload from Terraform is identical to the (also failing) manual request.

Conclusion

The firewall rule application logic on the backend is reacting to an empty or malformed input (likely an empty list []) that it fails to validate before casting to a GUID.

Action Item: Elevate to Cloud Support.

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