Nebius Topology Provider

The Nebius topology provider uses the Nebius AI Cloud SDK for Go. The Services().Compute().V1().Instance().List() method returns a list of compute instances for a specified project. Each instance may include a Status.InfinibandTopologyPath field, which is an array of three network IDs. If present, these IDs describe the path through the three-tier network, from the root switch down to the leaf switch.

To use the API, you must provide authorization. There are two ways to do this: using account credentials or an authorization token.

Using credentials:

Nebius credentials consist of the following fields:

• projectId
• serviceAccountId
• publicKeyId
• privateKey

The projectId field is optional. If it is omitted, the project ID is retrieved from /mnt/cloud-metadata/parent-id.

You can provide credentials either in the Topology configuration file or directly in the topology request payload.

Credentials via File

Store your credentials in a YAML file:

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projectId: <PROJECT-ID>
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serviceAccountId: <SERVICE-ACCOUNT-ID>
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publicKeyId: <PUBLIC-KEY-ID>
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privateKey: <PRIVATE-KEY>

Then reference this file in your Topograph config:

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http:
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  port: 49021
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  ssl: false
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provider: nebius
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engine: slurm
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credentialsPath: /path/to/credentials.yaml

Credentials via API Request Payload

Pass credentials directly in the topology request payload:

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{
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  "provider": {
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    "creds": {
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      "projectId": "PROJECT-ID",
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      "serviceAccountId": "<SERVICE-ACCOUNT-ID>",
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      "publicKeyId": "<PUBLIC-KEY-ID>",
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      "privateKey": "<PRIVATE-KEY>"
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    }
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  }
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}

Using authorization token

You can provide an authorization token in one of two ways:

• Via the environment variable IAM_TOKEN
• By placing the token in the file /mnt/cloud-metadata/token