llama-stack-mirror/llama_stack/providers/remote/inference/nvidia/nvidia.py

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the terms described in the LICENSE file in
# the root directory of this source tree.

import warnings
from collections.abc import AsyncIterator

from openai import NOT_GIVEN, APIConnectionError

from llama_stack.apis.common.content_types import (
    InterleavedContent,
)
from llama_stack.apis.inference import (
    ChatCompletionRequest,
    ChatCompletionResponse,
    ChatCompletionResponseStreamChunk,
    CompletionRequest,
    CompletionResponse,
    CompletionResponseStreamChunk,
    Inference,
    LogProbConfig,
    Message,
    OpenAIEmbeddingData,
    OpenAIEmbeddingsResponse,
    OpenAIEmbeddingUsage,
    ResponseFormat,
    SamplingParams,
    ToolChoice,
    ToolConfig,
)
from llama_stack.log import get_logger
from llama_stack.models.llama.datatypes import ToolDefinition, ToolPromptFormat
from llama_stack.providers.utils.inference.model_registry import (
    ModelRegistryHelper,
)
from llama_stack.providers.utils.inference.openai_compat import (
    convert_openai_chat_completion_choice,
    convert_openai_chat_completion_stream,
)
from llama_stack.providers.utils.inference.openai_mixin import OpenAIMixin
from llama_stack.providers.utils.inference.prompt_adapter import content_has_media

from . import NVIDIAConfig
from .models import MODEL_ENTRIES
from .openai_utils import (
    convert_chat_completion_request,
    convert_completion_request,
    convert_openai_completion_choice,
    convert_openai_completion_stream,
)
from .utils import _is_nvidia_hosted

logger = get_logger(name=__name__, category="inference::nvidia")


class NVIDIAInferenceAdapter(OpenAIMixin, Inference, ModelRegistryHelper):
    """
    NVIDIA Inference Adapter for Llama Stack.

    Note: The inheritance order is important here. OpenAIMixin must come before
    ModelRegistryHelper to ensure that OpenAIMixin.check_model_availability()
    is used instead of ModelRegistryHelper.check_model_availability(). It also
    must come before Inference to ensure that OpenAIMixin methods are available
    in the Inference interface.

    - OpenAIMixin.check_model_availability() queries the NVIDIA API to check if a model exists
    - ModelRegistryHelper.check_model_availability() just returns False and shows a warning
    """

    def __init__(self, config: NVIDIAConfig) -> None:
        # TODO(mf): filter by available models
        ModelRegistryHelper.__init__(self, model_entries=MODEL_ENTRIES)

        logger.info(f"Initializing NVIDIAInferenceAdapter({config.url})...")

        if _is_nvidia_hosted(config):
            if not config.api_key:
                raise RuntimeError(
                    "API key is required for hosted NVIDIA NIM. Either provide an API key or use a self-hosted NIM."
                )
        # elif self._config.api_key:
        #
        # we don't raise this warning because a user may have deployed their
        # self-hosted NIM with an API key requirement.
        #
        #     warnings.warn(
        #         "API key is not required for self-hosted NVIDIA NIM. "
        #         "Consider removing the api_key from the configuration."
        #     )

        self._config = config

    def get_api_key(self) -> str:
        """
        Get the API key for OpenAI mixin.

        :return: The NVIDIA API key
        """
        return self._config.api_key.get_secret_value() if self._config.api_key else "NO KEY"

    def get_base_url(self) -> str:
        """
        Get the base URL for OpenAI mixin.

        :return: The NVIDIA API base URL
        """
        return f"{self._config.url}/v1" if self._config.append_api_version else self._config.url

    async def completion(
        self,
        model_id: str,
        content: InterleavedContent,
        sampling_params: SamplingParams | None = None,
        response_format: ResponseFormat | None = None,
        stream: bool | None = False,
        logprobs: LogProbConfig | None = None,
    ) -> CompletionResponse | AsyncIterator[CompletionResponseStreamChunk]:
        if sampling_params is None:
            sampling_params = SamplingParams()
        if content_has_media(content):
            raise NotImplementedError("Media is not supported")

        # ToDo: check health of NeMo endpoints and enable this
        # removing this health check as NeMo customizer endpoint health check is returning 404
        # await check_health(self._config)  # this raises errors

        provider_model_id = await self._get_provider_model_id(model_id)
        request = convert_completion_request(
            request=CompletionRequest(
                model=provider_model_id,
                content=content,
                sampling_params=sampling_params,
                response_format=response_format,
                stream=stream,
                logprobs=logprobs,
            ),
            n=1,
        )

        try:
            response = await self.client.completions.create(**request)
        except APIConnectionError as e:
            raise ConnectionError(f"Failed to connect to NVIDIA NIM at {self._config.url}: {e}") from e

        if stream:
            return convert_openai_completion_stream(response)
        else:
            # we pass n=1 to get only one completion
            return convert_openai_completion_choice(response.choices[0])

    async def openai_embeddings(
        self,
        model: str,
        input: str | list[str],
        encoding_format: str | None = "float",
        dimensions: int | None = None,
        user: str | None = None,
    ) -> OpenAIEmbeddingsResponse:
        """
        OpenAI-compatible embeddings for NVIDIA NIM.

        Note: NVIDIA NIM asymmetric embedding models require an "input_type" field not present in the standard OpenAI embeddings API.
        We default this to "query" to ensure requests succeed when using the
        OpenAI-compatible endpoint. For passage embeddings, use the embeddings API with
        `task_type='document'`.
        """
        extra_body: dict[str, object] = {"input_type": "query"}
        logger.warning(
            "NVIDIA OpenAI-compatible embeddings: defaulting to input_type='query'. "
            "For passage embeddings, use the embeddings API with task_type='document'."
        )

        response = await self.client.embeddings.create(
            model=await self._get_provider_model_id(model),
            input=input,
            encoding_format=encoding_format if encoding_format is not None else NOT_GIVEN,
            dimensions=dimensions if dimensions is not None else NOT_GIVEN,
            user=user if user is not None else NOT_GIVEN,
            extra_body=extra_body,
        )

        data = []
        for i, embedding_data in enumerate(response.data):
            data.append(
                OpenAIEmbeddingData(
                    embedding=embedding_data.embedding,
                    index=i,
                )
            )

        usage = OpenAIEmbeddingUsage(
            prompt_tokens=response.usage.prompt_tokens,
            total_tokens=response.usage.total_tokens,
        )

        return OpenAIEmbeddingsResponse(
            data=data,
            model=response.model,
            usage=usage,
        )

    async def chat_completion(
        self,
        model_id: str,
        messages: list[Message],
        sampling_params: SamplingParams | None = None,
        response_format: ResponseFormat | None = None,
        tools: list[ToolDefinition] | None = None,
        tool_choice: ToolChoice | None = ToolChoice.auto,
        tool_prompt_format: ToolPromptFormat | None = None,
        stream: bool | None = False,
        logprobs: LogProbConfig | None = None,
        tool_config: ToolConfig | None = None,
    ) -> ChatCompletionResponse | AsyncIterator[ChatCompletionResponseStreamChunk]:
        if sampling_params is None:
            sampling_params = SamplingParams()
        if tool_prompt_format:
            warnings.warn("tool_prompt_format is not supported by NVIDIA NIM, ignoring", stacklevel=2)

        # await check_health(self._config)  # this raises errors

        provider_model_id = await self._get_provider_model_id(model_id)
        request = await convert_chat_completion_request(
            request=ChatCompletionRequest(
                model=provider_model_id,
                messages=messages,
                sampling_params=sampling_params,
                response_format=response_format,
                tools=tools,
                stream=stream,
                logprobs=logprobs,
                tool_config=tool_config,
            ),
            n=1,
        )

        try:
            response = await self.client.chat.completions.create(**request)
        except APIConnectionError as e:
            raise ConnectionError(f"Failed to connect to NVIDIA NIM at {self._config.url}: {e}") from e

        if stream:
            return convert_openai_chat_completion_stream(response, enable_incremental_tool_calls=False)
        else:
            # we pass n=1 to get only one completion
            return convert_openai_chat_completion_choice(response.choices[0])