OVH Terraform Provider Bug Network ID Mismatch Troubleshooting

July 14, 2025 by StackCamp Team 63 views

[BUG] Discussion Category ovh Terraform Provider OVH Network ID Format Mismatch

#ovh #terraform #bug #networking

Introduction

This article addresses a critical bug encountered while using the OVH Terraform provider, specifically concerning the format mismatch of network IDs between ovh_cloud_project_network_private and network.private.network.id in ovh_cloud_project_instance. This issue leads to deployment failures and necessitates a thorough understanding and resolution. The following sections will delve into the specifics of the bug, its impact, and potential solutions.

Understanding the Bug: OVH Network ID Mismatch

Detailed Description

The core issue revolves around the network ID returned by the ovh_cloud_project_network_private resource. This ID does not conform to the universally unique identifier (UUID) format expected by the network.private.network.id attribute within the ovh_cloud_project_instance resource. This discrepancy manifests as an error during Terraform apply, preventing the successful creation of instances within the private network. The error message clearly indicates that the provided network ID is not a valid UUID, highlighting the incompatibility between the two resource attributes.

When deploying cloud infrastructure using Terraform with the OVH provider, one expects seamless integration between different resources. However, this bug disrupts this integration, requiring users to manually intervene or find workarounds. The incorrect network ID format leads to a BadRequest error from the OVHcloud API, specifically stating that the given data is not valid for the UUID type. This not only halts the deployment process but also adds complexity to infrastructure management, as users must identify and address the format mismatch.

Impact on Infrastructure as Code (IaC)

This bug has significant implications for Infrastructure as Code (IaC) practices. IaC relies on the predictability and consistency of resource attributes. When a core attribute like the network ID exhibits unexpected behavior, it undermines the reliability of the entire infrastructure deployment process. Specifically, the mismatch prevents the automated creation of instances within private networks, which are crucial for secure and isolated environments. This issue can delay project timelines, increase operational overhead, and potentially introduce human errors if manual fixes are required.

Furthermore, the bug impacts the scalability and repeatability of infrastructure deployments. Automated scripts and configurations that depend on the correct network ID format will fail, making it difficult to provision multiple instances or replicate environments consistently. This can be particularly problematic for organizations adopting DevOps principles, where automation and repeatability are key to efficient infrastructure management. Therefore, addressing this bug is essential for maintaining the integrity and effectiveness of IaC deployments with OVH.

Error Message Breakdown

The error message provides valuable insights into the nature of the problem. The key part of the error message is: "[network.private.network.id] Given data (pn-1240644_0) is not valid for type uuid". This clearly indicates that the value being passed to network.private.network.id does not adhere to the UUID format. The network ID pn-1240644_0 is an example of the non-UUID format returned by the ovh_cloud_project_network_private resource.

The error message also includes the OVHcloud API status code 400, which signifies a BadRequest. This means that the request sent by Terraform to the OVHcloud API was malformed due to the incorrect network ID format. The X-OVH-Query-Id provides a unique identifier for the API request, which can be helpful for debugging and tracking issues with OVH support. Understanding the components of the error message is crucial for diagnosing the problem and implementing the appropriate fix.

Technical Details: Reproducing the Bug

Affected Resources

The primary resources affected by this bug are:

ovh_cloud_project_instance: This resource fails to create an instance due to the incorrect network ID format.
ovh_cloud_project_network_private: This resource provides the network ID in a non-UUID format.

Terraform Configuration Files

To reproduce the bug, you can use the following Terraform configuration files:

resource "ovh_cloud_project_network_private" "private_network" {
  service_name = var.project_id
  regions      = [var.region]
  name         = "private-network"
}

output "network_id" {
  value = ovh_cloud_project_network_private.private_network.id
}

resource "ovh_cloud_project_instance" "instance" {
  service_name   = var.service_name
  name           = var.name
  region         = var.region
  billing_period = "hourly"
  flavor {
    # Find the flavor ID where the flavor's name attribute matches "b3-8"
    flavor_id = one([
      for flavor in data.ovh_cloud_project_flavors.all_flavors.flavors : flavor.id
      if flavor.name == "b3-8"
    ])
  }

  boot_from {
    image_id = one([
      for image in data.ovh_cloud_project_images.all_images.images : image.id
      if image.name == "Ubuntu 24.04"
    ])
  }
  ssh_key {
    name = var.ssh_key_name
  }

  network {
    private {
      network {
        id        = var.network_id
        subnet_id = var.subnet_id
      }
    }
  }
}

This configuration defines a private network using ovh_cloud_project_network_private and attempts to create an instance within that network using ovh_cloud_project_instance. The output block exposes the network ID, which can be observed to be in the incorrect format. The instance resource references this ID, leading to the error during apply.

Steps to Reproduce

The steps to reproduce the issue are straightforward:

Initialize a Terraform workspace with the provided configuration files.
Run terraform apply.
Observe the error message indicating the invalid UUID format for the network ID.

This process consistently demonstrates the bug, highlighting the incompatibility between the network ID formats.

Analyzing the Error: Expected vs. Actual Behavior

Expected Behavior

The expected behavior is that the ovh_cloud_project_network_private resource should output a network ID in the correct UUID format, which can then be seamlessly used in the network.private.network.id attribute of the ovh_cloud_project_instance resource. This would allow for the automated creation of instances within private networks without any manual intervention or workarounds. The integration between these resources should be seamless, enabling users to define and deploy infrastructure in a predictable and consistent manner.

Actual Behavior

The actual behavior deviates significantly from the expectation. The ovh_cloud_project_network_private resource outputs a network ID that does not conform to the UUID format. This non-UUID format is incompatible with the network.private.network.id attribute of the ovh_cloud_project_instance resource, leading to a BadRequest error from the OVHcloud API. As a result, the instance creation fails, disrupting the infrastructure deployment process. This discrepancy highlights a critical bug in the OVH Terraform provider, which needs to be addressed to ensure proper resource integration.

The difference between the expected and actual behavior underscores the importance of adhering to standard data formats in APIs and resource attributes. The UUID format is a widely used standard for identifying resources uniquely. When a resource attribute deviates from this standard, it can lead to compatibility issues and integration challenges.

Solutions and Workarounds: Addressing the Network ID Mismatch

Identifying Workarounds

While a permanent fix from the OVH Terraform provider is pending, several workarounds can be employed to mitigate the issue. These workarounds may not be ideal in terms of automation and simplicity, but they can help unblock deployments and allow users to proceed with their infrastructure provisioning.

One potential workaround is to manually fetch the correct UUID for the private network and use it in the ovh_cloud_project_instance resource. This can be done by querying the OVHcloud API directly or using the OVH command-line interface (CLI) to retrieve the network details, including the UUID. However, this approach introduces manual steps into the process, reducing the benefits of Infrastructure as Code.

Another workaround involves using Terraform data sources to fetch the network information and extract the UUID. This approach is more automated than the manual method but still adds complexity to the Terraform configuration. The data source can query the OVHcloud API and filter the results to find the private network with the matching name or other attributes. The UUID can then be extracted from the data source output and used in the instance resource.

Potential Fixes

The most effective solution is to fix the OVH Terraform provider to ensure that the ovh_cloud_project_network_private resource outputs the network ID in the correct UUID format. This would eliminate the need for workarounds and restore the seamless integration between the network and instance resources. The fix would likely involve updating the provider code to retrieve the UUID from the OVHcloud API and expose it as the id attribute of the resource.

Another potential fix is to update the ovh_cloud_project_instance resource to accept the non-UUID format network ID. This would involve modifying the resource code to handle both UUID and non-UUID formats, allowing users to specify the network ID in either format. However, this approach may introduce complexity and potential compatibility issues in the future, as it deviates from the standard UUID format.

Implementing Temporary Solutions

In the meantime, users can implement temporary solutions based on the workarounds described above. For example, a Terraform data source can be used to fetch the network UUID and pass it to the instance resource. This can be achieved by adding a data source block to the configuration, querying the OVHcloud API for the private network, and extracting the UUID from the result.

data "ovh_cloud_project_network_private" "private_network" {
  service_name = var.project_id
  name         = "private-network" # Replace with your network name
}

resource "ovh_cloud_project_instance" "instance" {
  service_name   = var.service_name
  name           = var.name
  region         = var.region
  billing_period = "hourly"
  flavor {
    flavor_id = one([
      for flavor in data.ovh_cloud_project_flavors.all_flavors.flavors : flavor.id
      if flavor.name == "b3-8"
    ])
  }
  boot_from {
    image_id = one([
      for image in data.ovh_cloud_project_images.all_images.images : image.id
      if image.name == "Ubuntu 24.04"
    ])
  }
  ssh_key {
    name = var.ssh_key_name
  }
  network {
    private {
      network {
        id        = data.ovh_cloud_project_network_private.private_network.id
        subnet_id = var.subnet_id
      }
    }
  }
}

This temporary solution allows users to continue deploying instances within private networks while waiting for a permanent fix from the OVH Terraform provider.

Conclusion: Importance of Addressing the Bug

In conclusion, the network ID format mismatch between ovh_cloud_project_network_private and ovh_cloud_project_instance is a significant bug that impacts the reliability and efficiency of infrastructure deployments with the OVH Terraform provider. The incorrect network ID format prevents the automated creation of instances within private networks, hindering Infrastructure as Code practices. While workarounds can be implemented to mitigate the issue, a permanent fix from the OVH Terraform provider is essential for ensuring seamless resource integration and predictable infrastructure provisioning.

Addressing this bug is crucial for maintaining the integrity and effectiveness of IaC deployments with OVH. By fixing the provider to output network IDs in the correct UUID format, users can confidently deploy and manage their infrastructure without manual intervention or workarounds. This will improve the overall user experience and promote the adoption of Terraform for OVHcloud deployments. The discussed workarounds serve as temporary measures, but the long-term solution lies in the provider fix.

Repair Input Keyword

Bug in OVH Terraform provider causes network ID format mismatch between ovh_cloud_project_network_private and network.private.network.id in ovh_cloud_project_instance, leading to a "BadRequest" error. How to resolve the issue of the network ID format mismatch between ovh_cloud_project_network_private and network.private.network.id in ovh_cloud_project_instance when using the OVH Terraform provider?

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OVH Terraform Provider Bug Network ID Mismatch Troubleshooting