feat: add huggingface post_training impl (#2132)

# What does this PR do?


adds an inline HF SFTTrainer provider. Alongside touchtune -- this is a
super popular option for running training jobs. The config allows a user
to specify some key fields such as a model, chat_template, device, etc

the provider comes with one recipe `finetune_single_device` which works
both with and without LoRA.

any model that is a valid HF identifier can be given and the model will
be pulled.

this has been tested so far with CPU and MPS device types, but should be
compatible with CUDA out of the box

The provider processes the given dataset into the proper format,
establishes the various steps per epoch, steps per save, steps per eval,
sets a sane SFTConfig, and runs n_epochs of training

if checkpoint_dir is none, no model is saved. If there is a checkpoint
dir, a model is saved every `save_steps` and at the end of training.


## Test Plan

re-enabled post_training integration test suite with a singular test
that loads the simpleqa dataset:
https://huggingface.co/datasets/llamastack/simpleqa and a tiny granite
model: https://huggingface.co/ibm-granite/granite-3.3-2b-instruct. The
test now uses the llama stack client and the proper post_training API

runs one step with a batch_size of 1. This test runs on CPU on the
Ubuntu runner so it needs to be a small batch and a single step.

[//]: # (## Documentation)

---------

Signed-off-by: Charlie Doern <cdoern@redhat.com>

.github/workflows/integration-tests.yml

@@ -58,7 +58,7 @@ jobs:
           INFERENCE_MODEL: "meta-llama/Llama-3.2-3B-Instruct"
         run: |
           source .venv/bin/activate
-          nohup uv run llama stack run ./llama_stack/templates/ollama/run.yaml --image-type venv > server.log 2>&1 &
+          LLAMA_STACK_LOG_FILE=server.log nohup uv run llama stack run ./llama_stack/templates/ollama/run.yaml --image-type venv &
 
       - name: Wait for Llama Stack server to be ready
         if: matrix.client-type == 'http'
@@ -85,6 +85,11 @@ jobs:
             echo "Ollama health check failed"
             exit 1
           fi
+      - name: Check Storage and Memory Available Before Tests
+        if: ${{ always() }}
+        run: |
+          free -h
+          df -h
 
       - name: Run Integration Tests
         env:
@@ -100,12 +105,19 @@ jobs:
             --text-model="meta-llama/Llama-3.2-3B-Instruct" \
             --embedding-model=all-MiniLM-L6-v2
 
+      - name: Check Storage and Memory Available After Tests
+        if: ${{ always() }}
+        run: |
+          free -h
+          df -h
+
       - name: Write ollama logs to file
+        if: ${{ always() }}
         run: |
           sudo journalctl -u ollama.service > ollama.log
 
       - name: Upload all logs to artifacts
-        if: always()
+        if: ${{ always() }}
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: logs-${{ github.run_id }}-${{ github.run_attempt }}-${{ matrix.client-type }}-${{ matrix.test-type }}

docs/source/distributions/self_hosted_distro/ollama.md

@@ -19,6 +19,7 @@ The `llamastack/distribution-ollama` distribution consists of the following prov
 | datasetio | `remote::huggingface`, `inline::localfs` |
 | eval | `inline::meta-reference` |
 | inference | `remote::ollama` |
+| post_training | `inline::huggingface` |
 | safety | `inline::llama-guard` |
 | scoring | `inline::basic`, `inline::llm-as-judge`, `inline::braintrust` |
 | telemetry | `inline::meta-reference` |

llama_stack/providers/inline/post_training/common/utils.py

@@ -0,0 +1,35 @@
+# 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 gc
+
+
+def evacuate_model_from_device(model, device: str):
+    """Safely clear a model from memory and free device resources.
+    This function handles the proper cleanup of a model by:
+    1. Moving the model to CPU if it's on a non-CPU device
+    2. Deleting the model object to free memory
+    3. Running garbage collection
+    4. Clearing CUDA cache if the model was on a CUDA device
+    Args:
+        model: The PyTorch model to clear
+        device: The device type the model is currently on ('cuda', 'mps', 'cpu')
+    Note:
+        - For CUDA devices, this will clear the CUDA cache after moving the model to CPU
+        - For MPS devices, only moves the model to CPU (no cache clearing available)
+        - For CPU devices, only deletes the model object and runs garbage collection
+    """
+    if device != "cpu":
+        model.to("cpu")
+
+    del model
+    gc.collect()
+
+    if device == "cuda":
+        # we need to import such that this is only imported when the method is called
+        import torch
+
+        torch.cuda.empty_cache()

llama_stack/providers/inline/post_training/huggingface/__init__.py

@@ -0,0 +1,27 @@
+# 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.
+
+from typing import Any
+
+from llama_stack.distribution.datatypes import Api
+
+from .config import HuggingFacePostTrainingConfig
+
+# post_training api and the huggingface provider is still experimental and under heavy development
+
+
+async def get_provider_impl(
+    config: HuggingFacePostTrainingConfig,
+    deps: dict[Api, Any],
+):
+    from .post_training import HuggingFacePostTrainingImpl
+
+    impl = HuggingFacePostTrainingImpl(
+        config,
+        deps[Api.datasetio],
+        deps[Api.datasets],
+    )
+    return impl

llama_stack/providers/inline/post_training/huggingface/config.py

@@ -0,0 +1,72 @@
+# 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.
+
+from typing import Any, Literal
+
+from pydantic import BaseModel
+
+
+class HuggingFacePostTrainingConfig(BaseModel):
+    # Device to run training on (cuda, cpu, mps)
+    device: str = "cuda"
+
+    # Distributed training backend if using multiple devices
+    # fsdp: Fully Sharded Data Parallel
+    # deepspeed: DeepSpeed ZeRO optimization
+    distributed_backend: Literal["fsdp", "deepspeed"] | None = None
+
+    # Format for saving model checkpoints
+    # full_state: Save complete model state
+    # huggingface: Save in HuggingFace format (recommended for compatibility)
+    checkpoint_format: Literal["full_state", "huggingface"] | None = "huggingface"
+
+    # Template for formatting chat inputs and outputs
+    # Used to structure the conversation format for training
+    chat_template: str = "<|user|>\n{input}\n<|assistant|>\n{output}"
+
+    # Model-specific configuration parameters
+    # trust_remote_code: Allow execution of custom model code
+    # attn_implementation: Use SDPA (Scaled Dot Product Attention) for better performance
+    model_specific_config: dict = {
+        "trust_remote_code": True,
+        "attn_implementation": "sdpa",
+    }
+
+    # Maximum sequence length for training
+    # Set to 2048 as this is the maximum that works reliably on MPS (Apple Silicon)
+    # Longer sequences may cause memory issues on MPS devices
+    max_seq_length: int = 2048
+
+    # Enable gradient checkpointing to reduce memory usage
+    # Trades computation for memory by recomputing activations
+    gradient_checkpointing: bool = False
+
+    # Maximum number of checkpoints to keep
+    # Older checkpoints are deleted when this limit is reached
+    save_total_limit: int = 3
+
+    # Number of training steps between logging updates
+    logging_steps: int = 10
+
+    # Ratio of training steps used for learning rate warmup
+    # Helps stabilize early training
+    warmup_ratio: float = 0.1
+
+    # L2 regularization coefficient
+    # Helps prevent overfitting
+    weight_decay: float = 0.01
+
+    # Number of worker processes for data loading
+    # Higher values can improve data loading speed but increase memory usage
+    dataloader_num_workers: int = 4
+
+    # Whether to pin memory in data loader
+    # Can improve data transfer speed to GPU but uses more memory
+    dataloader_pin_memory: bool = True
+
+    @classmethod
+    def sample_run_config(cls, __distro_dir__: str, **kwargs: Any) -> dict[str, Any]:
+        return {"checkpoint_format": "huggingface", "distributed_backend": None, "device": "cpu"}

llama_stack/providers/inline/post_training/huggingface/post_training.py

@@ -0,0 +1,176 @@
+# 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.
+from enum import Enum
+from typing import Any
+
+from llama_stack.apis.datasetio import DatasetIO
+from llama_stack.apis.datasets import Datasets
+from llama_stack.apis.post_training import (
+    AlgorithmConfig,
+    Checkpoint,
+    DPOAlignmentConfig,
+    JobStatus,
+    ListPostTrainingJobsResponse,
+    PostTrainingJob,
+    PostTrainingJobArtifactsResponse,
+    PostTrainingJobStatusResponse,
+    TrainingConfig,
+)
+from llama_stack.providers.inline.post_training.huggingface.config import (
+    HuggingFacePostTrainingConfig,
+)
+from llama_stack.providers.inline.post_training.huggingface.recipes.finetune_single_device import (
+    HFFinetuningSingleDevice,
+)
+from llama_stack.providers.utils.scheduler import JobArtifact, Scheduler
+from llama_stack.providers.utils.scheduler import JobStatus as SchedulerJobStatus
+from llama_stack.schema_utils import webmethod
+
+
+class TrainingArtifactType(Enum):
+    CHECKPOINT = "checkpoint"
+    RESOURCES_STATS = "resources_stats"
+
+
+_JOB_TYPE_SUPERVISED_FINE_TUNE = "supervised-fine-tune"
+
+
+class HuggingFacePostTrainingImpl:
+    def __init__(
+        self,
+        config: HuggingFacePostTrainingConfig,
+        datasetio_api: DatasetIO,
+        datasets: Datasets,
+    ) -> None:
+        self.config = config
+        self.datasetio_api = datasetio_api
+        self.datasets_api = datasets
+        self._scheduler = Scheduler()
+
+    async def shutdown(self) -> None:
+        await self._scheduler.shutdown()
+
+    @staticmethod
+    def _checkpoint_to_artifact(checkpoint: Checkpoint) -> JobArtifact:
+        return JobArtifact(
+            type=TrainingArtifactType.CHECKPOINT.value,
+            name=checkpoint.identifier,
+            uri=checkpoint.path,
+            metadata=dict(checkpoint),
+        )
+
+    @staticmethod
+    def _resources_stats_to_artifact(resources_stats: dict[str, Any]) -> JobArtifact:
+        return JobArtifact(
+            type=TrainingArtifactType.RESOURCES_STATS.value,
+            name=TrainingArtifactType.RESOURCES_STATS.value,
+            metadata=resources_stats,
+        )
+
+    async def supervised_fine_tune(
+        self,
+        job_uuid: str,
+        training_config: TrainingConfig,
+        hyperparam_search_config: dict[str, Any],
+        logger_config: dict[str, Any],
+        model: str,
+        checkpoint_dir: str | None = None,
+        algorithm_config: AlgorithmConfig | None = None,
+    ) -> PostTrainingJob:
+        async def handler(on_log_message_cb, on_status_change_cb, on_artifact_collected_cb):
+            on_log_message_cb("Starting HF finetuning")
+
+            recipe = HFFinetuningSingleDevice(
+                job_uuid=job_uuid,
+                datasetio_api=self.datasetio_api,
+                datasets_api=self.datasets_api,
+            )
+
+            resources_allocated, checkpoints = await recipe.train(
+                model=model,
+                output_dir=checkpoint_dir,
+                job_uuid=job_uuid,
+                lora_config=algorithm_config,
+                config=training_config,
+                provider_config=self.config,
+            )
+
+            on_artifact_collected_cb(self._resources_stats_to_artifact(resources_allocated))
+            if checkpoints:
+                for checkpoint in checkpoints:
+                    artifact = self._checkpoint_to_artifact(checkpoint)
+                    on_artifact_collected_cb(artifact)
+
+            on_status_change_cb(SchedulerJobStatus.completed)
+            on_log_message_cb("HF finetuning completed")
+
+        job_uuid = self._scheduler.schedule(_JOB_TYPE_SUPERVISED_FINE_TUNE, job_uuid, handler)
+        return PostTrainingJob(job_uuid=job_uuid)
+
+    async def preference_optimize(
+        self,
+        job_uuid: str,
+        finetuned_model: str,
+        algorithm_config: DPOAlignmentConfig,
+        training_config: TrainingConfig,
+        hyperparam_search_config: dict[str, Any],
+        logger_config: dict[str, Any],
+    ) -> PostTrainingJob:
+        raise NotImplementedError("DPO alignment is not implemented yet")
+
+    async def get_training_jobs(self) -> ListPostTrainingJobsResponse:
+        return ListPostTrainingJobsResponse(
+            data=[PostTrainingJob(job_uuid=job.id) for job in self._scheduler.get_jobs()]
+        )
+
+    @staticmethod
+    def _get_artifacts_metadata_by_type(job, artifact_type):
+        return [artifact.metadata for artifact in job.artifacts if artifact.type == artifact_type]
+
+    @classmethod
+    def _get_checkpoints(cls, job):
+        return cls._get_artifacts_metadata_by_type(job, TrainingArtifactType.CHECKPOINT.value)
+
+    @classmethod
+    def _get_resources_allocated(cls, job):
+        data = cls._get_artifacts_metadata_by_type(job, TrainingArtifactType.RESOURCES_STATS.value)
+        return data[0] if data else None
+
+    @webmethod(route="/post-training/job/status")
+    async def get_training_job_status(self, job_uuid: str) -> PostTrainingJobStatusResponse | None:
+        job = self._scheduler.get_job(job_uuid)
+
+        match job.status:
+            # TODO: Add support for other statuses to API
+            case SchedulerJobStatus.new | SchedulerJobStatus.scheduled:
+                status = JobStatus.scheduled
+            case SchedulerJobStatus.running:
+                status = JobStatus.in_progress
+            case SchedulerJobStatus.completed:
+                status = JobStatus.completed
+            case SchedulerJobStatus.failed:
+                status = JobStatus.failed
+            case _:
+                raise NotImplementedError()
+
+        return PostTrainingJobStatusResponse(
+            job_uuid=job_uuid,
+            status=status,
+            scheduled_at=job.scheduled_at,
+            started_at=job.started_at,
+            completed_at=job.completed_at,
+            checkpoints=self._get_checkpoints(job),
+            resources_allocated=self._get_resources_allocated(job),
+        )
+
+    @webmethod(route="/post-training/job/cancel")
+    async def cancel_training_job(self, job_uuid: str) -> None:
+        self._scheduler.cancel(job_uuid)
+
+    @webmethod(route="/post-training/job/artifacts")
+    async def get_training_job_artifacts(self, job_uuid: str) -> PostTrainingJobArtifactsResponse | None:
+        job = self._scheduler.get_job(job_uuid)
+        return PostTrainingJobArtifactsResponse(job_uuid=job_uuid, checkpoints=self._get_checkpoints(job))

llama_stack/providers/inline/post_training/huggingface/recipes/finetune_single_device.py

@@ -0,0 +1,683 @@
+# 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 gc
+import json
+import logging
+import multiprocessing
+import os
+import signal
+import sys
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+
+import psutil
+
+from llama_stack.providers.inline.post_training.common.utils import evacuate_model_from_device
+
+# Set tokenizer parallelism environment variable
+os.environ["TOKENIZERS_PARALLELISM"] = "false"
+
+# Force PyTorch to use OpenBLAS instead of MKL
+os.environ["MKL_THREADING_LAYER"] = "GNU"
+os.environ["MKL_SERVICE_FORCE_INTEL"] = "0"
+os.environ["MKL_NUM_THREADS"] = "1"
+
+import torch
+from datasets import Dataset
+from peft import LoraConfig
+from transformers import (
+    AutoConfig,
+    AutoModelForCausalLM,
+    AutoTokenizer,
+)
+from trl import SFTConfig, SFTTrainer
+
+from llama_stack.apis.datasetio import DatasetIO
+from llama_stack.apis.datasets import Datasets
+from llama_stack.apis.post_training import (
+    Checkpoint,
+    DataConfig,
+    LoraFinetuningConfig,
+    TrainingConfig,
+)
+
+from ..config import HuggingFacePostTrainingConfig
+
+logger = logging.getLogger(__name__)
+
+
+def get_gb(to_convert: int) -> str:
+    """Converts memory stats to GB and formats to 2 decimal places.
+    Args:
+        to_convert: Memory value in bytes
+    Returns:
+        str: Memory value in GB formatted to 2 decimal places
+    """
+    return f"{(to_convert / (1024**3)):.2f}"
+
+
+def get_memory_stats(device: torch.device) -> dict[str, Any]:
+    """Get memory statistics for the given device."""
+    stats = {
+        "system_memory": {
+            "total": get_gb(psutil.virtual_memory().total),
+            "available": get_gb(psutil.virtual_memory().available),
+            "used": get_gb(psutil.virtual_memory().used),
+            "percent": psutil.virtual_memory().percent,
+        }
+    }
+
+    if device.type == "cuda":
+        stats["device_memory"] = {
+            "allocated": get_gb(torch.cuda.memory_allocated(device)),
+            "reserved": get_gb(torch.cuda.memory_reserved(device)),
+            "max_allocated": get_gb(torch.cuda.max_memory_allocated(device)),
+        }
+    elif device.type == "mps":
+        # MPS doesn't provide direct memory stats, but we can track system memory
+        stats["device_memory"] = {
+            "note": "MPS memory stats not directly available",
+            "system_memory_used": get_gb(psutil.virtual_memory().used),
+        }
+    elif device.type == "cpu":
+        # For CPU, we track process memory usage
+        process = psutil.Process()
+        stats["device_memory"] = {
+            "process_rss": get_gb(process.memory_info().rss),
+            "process_vms": get_gb(process.memory_info().vms),
+            "process_percent": process.memory_percent(),
+        }
+
+    return stats
+
+
+def setup_torch_device(device_str: str) -> torch.device:
+    """Initialize and validate a PyTorch device.
+    This function handles device initialization and validation for different device types:
+    - CUDA: Validates CUDA availability and handles device selection
+    - MPS: Validates MPS availability for Apple Silicon
+    - CPU: Basic validation
+    - HPU: Raises error as it's not supported
+    Args:
+        device_str: String specifying the device ('cuda', 'cpu', 'mps')
+    Returns:
+        torch.device: The initialized and validated device
+    Raises:
+        RuntimeError: If device initialization fails or device is not supported
+    """
+    try:
+        device = torch.device(device_str)
+    except RuntimeError as e:
+        raise RuntimeError(f"Error getting Torch Device {str(e)}") from e
+
+    # Validate device capabilities
+    if device.type == "cuda":
+        if not torch.cuda.is_available():
+            raise RuntimeError(
+                f"{device.type}: Torch has no CUDA/ROCm support or could not detect a compatible device."
+            )
+        if device.index is None:
+            device = torch.device(device.type, torch.cuda.current_device())
+    elif device.type == "mps":
+        if not torch.backends.mps.is_available():
+            raise RuntimeError(f"{device.type}: Torch has no MPS support or could not detect a compatible device.")
+    elif device.type == "hpu":
+        raise RuntimeError(f"{device.type}: training does not support Intel Gaudi.")
+
+    return device
+
+
+class HFFinetuningSingleDevice:
+    def __init__(
+        self,
+        job_uuid: str,
+        datasetio_api: DatasetIO,
+        datasets_api: Datasets,
+    ):
+        self.datasetio_api = datasetio_api
+        self.datasets_api = datasets_api
+        self.job_uuid = job_uuid
+
+    def validate_dataset_format(self, rows: list[dict]) -> bool:
+        """Validate that the dataset has the required fields."""
+        required_fields = ["input_query", "expected_answer", "chat_completion_input"]
+        return all(field in row for row in rows for field in required_fields)
+
+    def _process_instruct_format(self, row: dict) -> tuple[str | None, str | None]:
+        """Process a row in instruct format."""
+        if "chat_completion_input" in row and "expected_answer" in row:
+            try:
+                messages = json.loads(row["chat_completion_input"])
+                if not isinstance(messages, list) or len(messages) != 1:
+                    logger.warning(f"Invalid chat_completion_input format: {row['chat_completion_input']}")
+                    return None, None
+                if "content" not in messages[0]:
+                    logger.warning(f"Message missing content: {messages[0]}")
+                    return None, None
+                return messages[0]["content"], row["expected_answer"]
+            except json.JSONDecodeError:
+                logger.warning(f"Failed to parse chat_completion_input: {row['chat_completion_input']}")
+                return None, None
+        return None, None
+
+    def _process_dialog_format(self, row: dict) -> tuple[str | None, str | None]:
+        """Process a row in dialog format."""
+        if "dialog" in row:
+            try:
+                dialog = json.loads(row["dialog"])
+                if not isinstance(dialog, list) or len(dialog) < 2:
+                    logger.warning(f"Dialog must have at least 2 messages: {row['dialog']}")
+                    return None, None
+                if dialog[0].get("role") != "user":
+                    logger.warning(f"First message must be from user: {dialog[0]}")
+                    return None, None
+                if not any(msg.get("role") == "assistant" for msg in dialog):
+                    logger.warning("Dialog must have at least one assistant message")
+                    return None, None
+
+                # Convert to human/gpt format
+                role_map = {"user": "human", "assistant": "gpt"}
+                conversations = []
+                for msg in dialog:
+                    if "role" not in msg or "content" not in msg:
+                        logger.warning(f"Message missing role or content: {msg}")
+                        continue
+                    conversations.append({"from": role_map[msg["role"]], "value": msg["content"]})
+
+                # Format as a single conversation
+                return conversations[0]["value"], conversations[1]["value"]
+            except json.JSONDecodeError:
+                logger.warning(f"Failed to parse dialog: {row['dialog']}")
+                return None, None
+        return None, None
+
+    def _process_fallback_format(self, row: dict) -> tuple[str | None, str | None]:
+        """Process a row using fallback formats."""
+        if "input" in row and "output" in row:
+            return row["input"], row["output"]
+        elif "prompt" in row and "completion" in row:
+            return row["prompt"], row["completion"]
+        elif "question" in row and "answer" in row:
+            return row["question"], row["answer"]
+        return None, None
+
+    def _format_text(self, input_text: str, output_text: str, provider_config: HuggingFacePostTrainingConfig) -> str:
+        """Format input and output text based on model requirements."""
+        if hasattr(provider_config, "chat_template"):
+            return provider_config.chat_template.format(input=input_text, output=output_text)
+        return f"{input_text}\n{output_text}"
+
+    def _create_dataset(
+        self, rows: list[dict], config: TrainingConfig, provider_config: HuggingFacePostTrainingConfig
+    ) -> Dataset:
+        """Create and preprocess the dataset."""
+        formatted_rows = []
+        for row in rows:
+            input_text = None
+            output_text = None
+
+            # Process based on format
+            assert isinstance(config.data_config, DataConfig), "DataConfig must be initialized"
+            if config.data_config.data_format.value == "instruct":
+                input_text, output_text = self._process_instruct_format(row)
+            elif config.data_config.data_format.value == "dialog":
+                input_text, output_text = self._process_dialog_format(row)
+            else:
+                input_text, output_text = self._process_fallback_format(row)
+
+            if input_text and output_text:
+                formatted_text = self._format_text(input_text, output_text, provider_config)
+                formatted_rows.append({"text": formatted_text})
+
+        if not formatted_rows:
+            assert isinstance(config.data_config, DataConfig), "DataConfig must be initialized"
+            raise ValueError(
+                f"No valid input/output pairs found in the dataset for format: {config.data_config.data_format.value}"
+            )
+
+        return Dataset.from_list(formatted_rows)
+
+    def _preprocess_dataset(
+        self, ds: Dataset, tokenizer: AutoTokenizer, provider_config: HuggingFacePostTrainingConfig
+    ) -> Dataset:
+        """Preprocess the dataset with tokenizer."""
+
+        def tokenize_function(examples):
+            return tokenizer(
+                examples["text"],
+                padding=True,
+                truncation=True,
+                max_length=provider_config.max_seq_length,
+                return_tensors=None,
+            )
+
+        return ds.map(
+            tokenize_function,
+            batched=True,
+            remove_columns=ds.column_names,
+        )
+
+    async def _setup_data(self, dataset_id: str) -> list[dict[str, Any]]:
+        """Load dataset from llama stack dataset provider"""
+        try:
+            all_rows = await self.datasetio_api.iterrows(
+                dataset_id=dataset_id,
+                limit=-1,
+            )
+            if not isinstance(all_rows.data, list):
+                raise RuntimeError("Expected dataset data to be a list")
+            return all_rows.data
+        except Exception as e:
+            raise RuntimeError(f"Failed to load dataset: {str(e)}") from e
+
+    def _run_training_sync(
+        self,
+        model: str,
+        provider_config: dict[str, Any],
+        peft_config: LoraConfig | None,
+        config: dict[str, Any],
+        output_dir_path: Path | None,
+    ) -> None:
+        """Synchronous wrapper for running training process.
+        This method serves as a bridge between the multiprocessing Process and the async training function.
+        It creates a new event loop to run the async training process.
+        Args:
+            model: The model identifier to load
+            dataset_id: ID of the dataset to use for training
+            provider_config: Configuration specific to the HuggingFace provider
+            peft_config: Optional LoRA configuration
+            config: General training configuration
+            output_dir_path: Optional path to save the model
+        """
+        import asyncio
+
+        logger.info("Starting training process with async wrapper")
+        asyncio.run(
+            self._run_training(
+                model=model,
+                provider_config=provider_config,
+                peft_config=peft_config,
+                config=config,
+                output_dir_path=output_dir_path,
+            )
+        )
+
+    async def load_dataset(
+        self,
+        model: str,
+        config: TrainingConfig,
+        provider_config: HuggingFacePostTrainingConfig,
+    ) -> tuple[Dataset, Dataset, AutoTokenizer]:
+        """Load and prepare the dataset for training.
+        Args:
+            model: The model identifier to load
+            config: Training configuration
+            provider_config: Provider-specific configuration
+        Returns:
+            tuple: (train_dataset, eval_dataset, tokenizer)
+        """
+        # Validate data config
+        if not config.data_config:
+            raise ValueError("DataConfig is required for training")
+
+        # Load dataset
+        logger.info(f"Loading dataset: {config.data_config.dataset_id}")
+        rows = await self._setup_data(config.data_config.dataset_id)
+        if not self.validate_dataset_format(rows):
+            raise ValueError("Dataset is missing required fields: input_query, expected_answer, chat_completion_input")
+        logger.info(f"Loaded {len(rows)} rows from dataset")
+
+        # Initialize tokenizer
+        logger.info(f"Initializing tokenizer for model: {model}")
+        try:
+            tokenizer = AutoTokenizer.from_pretrained(model, **provider_config.model_specific_config)
+
+            # Set pad token to eos token if not present
+            # This is common for models that don't have a dedicated pad token
+            if not tokenizer.pad_token:
+                tokenizer.pad_token = tokenizer.eos_token
+
+            # Set padding side to right for causal language modeling
+            # This ensures that padding tokens don't interfere with the model's ability
+            # to predict the next token in the sequence
+            tokenizer.padding_side = "right"
+
+            # Set truncation side to right to keep the beginning of the sequence
+            # This is important for maintaining context and instruction format
+            tokenizer.truncation_side = "right"
+
+            # Set model max length to match provider config
+            # This ensures consistent sequence lengths across the training process
+            tokenizer.model_max_length = provider_config.max_seq_length
+
+            logger.info("Tokenizer initialized successfully")
+        except Exception as e:
+            raise RuntimeError(f"Failed to initialize tokenizer: {str(e)}") from e
+
+        # Create and preprocess dataset
+        logger.info("Creating and preprocessing dataset")
+        try:
+            ds = self._create_dataset(rows, config, provider_config)
+            ds = self._preprocess_dataset(ds, tokenizer, provider_config)
+            logger.info(f"Dataset created with {len(ds)} examples")
+        except Exception as e:
+            raise ValueError(f"Failed to create dataset: {str(e)}") from e
+
+        # Split dataset
+        logger.info("Splitting dataset into train and validation sets")
+        train_val_split = ds.train_test_split(test_size=0.1, seed=42)
+        train_dataset = train_val_split["train"]
+        eval_dataset = train_val_split["test"]
+        logger.info(f"Split dataset into {len(train_dataset)} training and {len(eval_dataset)} validation examples")
+
+        return train_dataset, eval_dataset, tokenizer
+
+    def load_model(
+        self,
+        model: str,
+        device: torch.device,
+        provider_config: HuggingFacePostTrainingConfig,
+    ) -> AutoModelForCausalLM:
+        """Load and initialize the model for training.
+        Args:
+            model: The model identifier to load
+            device: The device to load the model onto
+            provider_config: Provider-specific configuration
+        Returns:
+            The loaded and initialized model
+        Raises:
+            RuntimeError: If model loading fails
+        """
+        logger.info("Loading the base model")
+        try:
+            model_config = AutoConfig.from_pretrained(model, **provider_config.model_specific_config)
+            model_obj = AutoModelForCausalLM.from_pretrained(
+                model,
+                torch_dtype="auto" if device.type != "cpu" else "float32",
+                quantization_config=None,
+                config=model_config,
+                **provider_config.model_specific_config,
+            )
+            # Always move model to specified device
+            model_obj = model_obj.to(device)
+            logger.info(f"Model loaded and moved to device: {model_obj.device}")
+            return model_obj
+        except Exception as e:
+            raise RuntimeError(f"Failed to load model: {str(e)}") from e
+
+    def setup_training_args(
+        self,
+        config: TrainingConfig,
+        provider_config: HuggingFacePostTrainingConfig,
+        device: torch.device,
+        output_dir_path: Path | None,
+        steps_per_epoch: int,
+    ) -> SFTConfig:
+        """Setup training arguments.
+        Args:
+            config: Training configuration
+            provider_config: Provider-specific configuration
+            device: The device to train on
+            output_dir_path: Optional path to save the model
+            steps_per_epoch: Number of steps per epoch
+        Returns:
+            Configured SFTConfig object
+        """
+        logger.info("Configuring training arguments")
+        lr = 2e-5
+        if config.optimizer_config:
+            lr = config.optimizer_config.lr
+            logger.info(f"Using custom learning rate: {lr}")
+
+        # Validate data config
+        if not config.data_config:
+            raise ValueError("DataConfig is required for training")
+        data_config = config.data_config
+
+        # Calculate steps
+        total_steps = steps_per_epoch * config.n_epochs
+        max_steps = min(config.max_steps_per_epoch, total_steps)
+        eval_steps = max(1, steps_per_epoch // 10)  # Evaluate 10 times per epoch
+        save_steps = max(1, steps_per_epoch // 5)  # Save 5 times per epoch
+        logging_steps = max(1, steps_per_epoch // 50)  # Log 50 times per epoch
+
+        logger.info("Training configuration:")
+        logger.info(f"- Steps per epoch: {steps_per_epoch}")
+        logger.info(f"- Total steps: {total_steps}")
+        logger.info(f"- Max steps: {max_steps}")
+        logger.info(f"- Eval steps: {eval_steps}")
+        logger.info(f"- Save steps: {save_steps}")
+        logger.info(f"- Logging steps: {logging_steps}")
+
+        # Configure save strategy
+        save_strategy = "no"
+        if output_dir_path:
+            save_strategy = "steps"
+            logger.info(f"Will save checkpoints to {output_dir_path}")
+
+        return SFTConfig(
+            max_steps=max_steps,
+            output_dir=str(output_dir_path) if output_dir_path is not None else None,
+            num_train_epochs=config.n_epochs,
+            per_device_train_batch_size=data_config.batch_size,
+            fp16=device.type == "cuda",
+            bf16=False,  # Causes CPU issues.
+            eval_strategy="steps",
+            use_cpu=True if device.type == "cpu" and not torch.backends.mps.is_available() else False,
+            save_strategy=save_strategy,
+            report_to="none",
+            max_seq_length=provider_config.max_seq_length,
+            gradient_accumulation_steps=config.gradient_accumulation_steps,
+            gradient_checkpointing=provider_config.gradient_checkpointing,
+            learning_rate=lr,
+            warmup_ratio=provider_config.warmup_ratio,
+            weight_decay=provider_config.weight_decay,
+            remove_unused_columns=False,
+            dataloader_pin_memory=provider_config.dataloader_pin_memory,
+            dataloader_num_workers=provider_config.dataloader_num_workers,
+            dataset_text_field="text",
+            packing=False,
+            load_best_model_at_end=True if output_dir_path else False,
+            metric_for_best_model="eval_loss",
+            greater_is_better=False,
+            eval_steps=eval_steps,
+            save_steps=save_steps,
+            logging_steps=logging_steps,
+        )
+
+    def save_model(
+        self,
+        model_obj: AutoModelForCausalLM,
+        trainer: SFTTrainer,
+        peft_config: LoraConfig | None,
+        output_dir_path: Path,
+    ) -> None:
+        """Save the trained model.
+        Args:
+            model_obj: The model to save
+            trainer: The trainer instance
+            peft_config: Optional LoRA configuration
+            output_dir_path: Path to save the model
+        """
+        logger.info("Saving final model")
+        model_obj.config.use_cache = True
+
+        if peft_config:
+            logger.info("Merging LoRA weights with base model")
+            model_obj = trainer.model.merge_and_unload()
+        else:
+            model_obj = trainer.model
+
+        save_path = output_dir_path / "merged_model"
+        logger.info(f"Saving model to {save_path}")
+        model_obj.save_pretrained(save_path)
+
+    async def _run_training(
+        self,
+        model: str,
+        provider_config: dict[str, Any],
+        peft_config: LoraConfig | None,
+        config: dict[str, Any],
+        output_dir_path: Path | None,
+    ) -> None:
+        """Run the training process with signal handling."""
+
+        def signal_handler(signum, frame):
+            """Handle termination signals gracefully."""
+            logger.info(f"Received signal {signum}, initiating graceful shutdown")
+            sys.exit(0)
+
+        signal.signal(signal.SIGTERM, signal_handler)
+        signal.signal(signal.SIGINT, signal_handler)
+
+        # Convert config dicts back to objects
+        logger.info("Initializing configuration objects")
+        provider_config_obj = HuggingFacePostTrainingConfig(**provider_config)
+        config_obj = TrainingConfig(**config)
+
+        # Initialize and validate device
+        device = setup_torch_device(provider_config_obj.device)
+        logger.info(f"Using device '{device}'")
+
+        # Load dataset and tokenizer
+        train_dataset, eval_dataset, tokenizer = await self.load_dataset(model, config_obj, provider_config_obj)
+
+        # Calculate steps per epoch
+        if not config_obj.data_config:
+            raise ValueError("DataConfig is required for training")
+        steps_per_epoch = len(train_dataset) // config_obj.data_config.batch_size
+
+        # Setup training arguments
+        training_args = self.setup_training_args(
+            config_obj,
+            provider_config_obj,
+            device,
+            output_dir_path,
+            steps_per_epoch,
+        )
+
+        # Load model
+        model_obj = self.load_model(model, device, provider_config_obj)
+
+        # Initialize trainer
+        logger.info("Initializing SFTTrainer")
+        trainer = SFTTrainer(
+            model=model_obj,
+            train_dataset=train_dataset,
+            eval_dataset=eval_dataset,
+            peft_config=peft_config,
+            args=training_args,
+        )
+
+        try:
+            # Train
+            logger.info("Starting training")
+            trainer.train()
+            logger.info("Training completed successfully")
+
+            # Save final model if output directory is provided
+            if output_dir_path:
+                self.save_model(model_obj, trainer, peft_config, output_dir_path)
+
+        finally:
+            # Clean up resources
+            logger.info("Cleaning up resources")
+            if hasattr(trainer, "model"):
+                evacuate_model_from_device(trainer.model, device.type)
+            del trainer
+            gc.collect()
+            logger.info("Cleanup completed")
+
+    async def train(
+        self,
+        model: str,
+        output_dir: str | None,
+        job_uuid: str,
+        lora_config: LoraFinetuningConfig,
+        config: TrainingConfig,
+        provider_config: HuggingFacePostTrainingConfig,
+    ) -> tuple[dict[str, Any], list[Checkpoint] | None]:
+        """Train a model using HuggingFace's SFTTrainer"""
+        # Initialize and validate device
+        device = setup_torch_device(provider_config.device)
+        logger.info(f"Using device '{device}'")
+
+        output_dir_path = None
+        if output_dir:
+            output_dir_path = Path(output_dir)
+
+        # Track memory stats
+        memory_stats = {
+            "initial": get_memory_stats(device),
+            "after_training": None,
+            "final": None,
+        }
+
+        # Configure LoRA
+        peft_config = None
+        if lora_config:
+            peft_config = LoraConfig(
+                lora_alpha=lora_config.alpha,
+                lora_dropout=0.1,
+                r=lora_config.rank,
+                bias="none",
+                task_type="CAUSAL_LM",
+                target_modules=lora_config.lora_attn_modules,
+            )
+
+        # Validate data config
+        if not config.data_config:
+            raise ValueError("DataConfig is required for training")
+
+        # Train in a separate process
+        logger.info("Starting training in separate process")
+        try:
+            # Set multiprocessing start method to 'spawn' for CUDA/MPS compatibility
+            if device.type in ["cuda", "mps"]:
+                multiprocessing.set_start_method("spawn", force=True)
+
+            process = multiprocessing.Process(
+                target=self._run_training_sync,
+                kwargs={
+                    "model": model,
+                    "provider_config": provider_config.model_dump(),
+                    "peft_config": peft_config,
+                    "config": config.model_dump(),
+                    "output_dir_path": output_dir_path,
+                },
+            )
+            process.start()
+
+            # Monitor the process
+            while process.is_alive():
+                process.join(timeout=1)  # Check every second
+                if not process.is_alive():
+                    break
+
+            # Get the return code
+            if process.exitcode != 0:
+                raise RuntimeError(f"Training failed with exit code {process.exitcode}")
+
+            memory_stats["after_training"] = get_memory_stats(device)
+
+            checkpoints = None
+            if output_dir_path:
+                # Create checkpoint
+                checkpoint = Checkpoint(
+                    identifier=f"{model}-sft-{config.n_epochs}",
+                    created_at=datetime.now(timezone.utc),
+                    epoch=config.n_epochs,
+                    post_training_job_id=job_uuid,
+                    path=str(output_dir_path / "merged_model"),
+                )
+                checkpoints = [checkpoint]
+
+            return memory_stats, checkpoints
+        finally:
+            memory_stats["final"] = get_memory_stats(device)
+            gc.collect()

llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device.py

@@ -4,7 +4,6 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-import gc
 import logging
 import os
 import time
@@ -47,6 +46,7 @@ from llama_stack.apis.post_training import (
 from llama_stack.distribution.utils.config_dirs import DEFAULT_CHECKPOINT_DIR
 from llama_stack.distribution.utils.model_utils import model_local_dir
 from llama_stack.models.llama.sku_list import resolve_model
+from llama_stack.providers.inline.post_training.common.utils import evacuate_model_from_device
 from llama_stack.providers.inline.post_training.torchtune.common import utils
 from llama_stack.providers.inline.post_training.torchtune.common.checkpointer import (
     TorchtuneCheckpointer,
@@ -554,11 +554,7 @@ class LoraFinetuningSingleDevice:
             checkpoints.append(checkpoint)
 
         # clean up the memory after training finishes
-        if self._device.type != "cpu":
-            self._model.to("cpu")
-            torch.cuda.empty_cache()
-        del self._model
-        gc.collect()
+        evacuate_model_from_device(self._model, self._device.type)
 
         return (memory_stats, checkpoints)
 

llama_stack/providers/registry/post_training.py

@@ -21,6 +21,17 @@ def available_providers() -> list[ProviderSpec]:
                 Api.datasets,
             ],
         ),
+        InlineProviderSpec(
+            api=Api.post_training,
+            provider_type="inline::huggingface",
+            pip_packages=["torch", "trl", "transformers", "peft", "datasets"],
+            module="llama_stack.providers.inline.post_training.huggingface",
+            config_class="llama_stack.providers.inline.post_training.huggingface.HuggingFacePostTrainingConfig",
+            api_dependencies=[
+                Api.datasetio,
+                Api.datasets,
+            ],
+        ),
         remote_provider_spec(
             api=Api.post_training,
             adapter=AdapterSpec(

llama_stack/templates/dependencies.json

@@ -441,6 +441,7 @@
     "opentelemetry-exporter-otlp-proto-http",
     "opentelemetry-sdk",
     "pandas",
+    "peft",
     "pillow",
     "psycopg2-binary",
     "pymongo",
@@ -451,9 +452,11 @@
     "scikit-learn",
     "scipy",
     "sentencepiece",
+    "torch",
     "tqdm",
     "transformers",
     "tree_sitter",
+    "trl",
     "uvicorn"
   ],
   "open-benchmark": [

llama_stack/templates/experimental-post-training/build.yaml

@@ -13,9 +13,10 @@ distribution_spec:
     - inline::basic
     - inline::braintrust
     post_training:
-    - inline::torchtune
+    - inline::huggingface
     datasetio:
     - inline::localfs
+    - remote::huggingface
     telemetry:
     - inline::meta-reference
     agents:

llama_stack/templates/experimental-post-training/run.yaml

@@ -49,16 +49,24 @@ providers:
         type: sqlite
         namespace: null
         db_path: ${env.SQLITE_STORE_DIR:~/.llama/distributions/experimental-post-training}/localfs_datasetio.db
+  - provider_id: huggingface
+    provider_type: remote::huggingface
+    config:
+      kvstore:
+        type: sqlite
+        namespace: null
+        db_path: ${env.SQLITE_STORE_DIR:~/.llama/distributions/huggingface}/huggingface_datasetio.db
   telemetry:
   - provider_id: meta-reference
     provider_type: inline::meta-reference
     config: {}
   post_training:
-  - provider_id: torchtune-post-training
-    provider_type: inline::torchtune
-    config: {
+  - provider_id: huggingface
+    provider_type: inline::huggingface
+    config:
       checkpoint_format: huggingface
-    }
+      distributed_backend: null
+      device: cpu
   agents:
   - provider_id: meta-reference
     provider_type: inline::meta-reference

llama_stack/templates/ollama/build.yaml

@@ -23,6 +23,8 @@ distribution_spec:
     - inline::basic
     - inline::llm-as-judge
     - inline::braintrust
+    post_training:
+    - inline::huggingface
     tool_runtime:
     - remote::brave-search
     - remote::tavily-search

llama_stack/templates/ollama/ollama.py

@@ -13,6 +13,7 @@ from llama_stack.distribution.datatypes import (
     ShieldInput,
     ToolGroupInput,
 )
+from llama_stack.providers.inline.post_training.huggingface import HuggingFacePostTrainingConfig
 from llama_stack.providers.inline.vector_io.faiss.config import FaissVectorIOConfig
 from llama_stack.providers.remote.inference.ollama import OllamaImplConfig
 from llama_stack.templates.template import DistributionTemplate, RunConfigSettings
@@ -28,6 +29,7 @@ def get_distribution_template() -> DistributionTemplate:
         "eval": ["inline::meta-reference"],
         "datasetio": ["remote::huggingface", "inline::localfs"],
         "scoring": ["inline::basic", "inline::llm-as-judge", "inline::braintrust"],
+        "post_training": ["inline::huggingface"],
         "tool_runtime": [
             "remote::brave-search",
             "remote::tavily-search",
@@ -47,7 +49,11 @@ def get_distribution_template() -> DistributionTemplate:
         provider_type="inline::faiss",
         config=FaissVectorIOConfig.sample_run_config(f"~/.llama/distributions/{name}"),
     )
-
+    posttraining_provider = Provider(
+        provider_id="huggingface",
+        provider_type="inline::huggingface",
+        config=HuggingFacePostTrainingConfig.sample_run_config(f"~/.llama/distributions/{name}"),
+    )
     inference_model = ModelInput(
         model_id="${env.INFERENCE_MODEL}",
         provider_id="ollama",
@@ -92,6 +98,7 @@ def get_distribution_template() -> DistributionTemplate:
                 provider_overrides={
                     "inference": [inference_provider],
                     "vector_io": [vector_io_provider_faiss],
+                    "post_training": [posttraining_provider],
                 },
                 default_models=[inference_model, embedding_model],
                 default_tool_groups=default_tool_groups,
@@ -100,6 +107,7 @@ def get_distribution_template() -> DistributionTemplate:
                 provider_overrides={
                     "inference": [inference_provider],
                     "vector_io": [vector_io_provider_faiss],
+                    "post_training": [posttraining_provider],
                     "safety": [
                         Provider(
                             provider_id="llama-guard",

llama_stack/templates/ollama/run-with-safety.yaml

@@ -5,6 +5,7 @@ apis:
 - datasetio
 - eval
 - inference
+- post_training
 - safety
 - scoring
 - telemetry
@@ -80,6 +81,13 @@ providers:
     provider_type: inline::braintrust
     config:
       openai_api_key: ${env.OPENAI_API_KEY:}
+  post_training:
+  - provider_id: huggingface
+    provider_type: inline::huggingface
+    config:
+      checkpoint_format: huggingface
+      distributed_backend: null
+      device: cpu
   tool_runtime:
   - provider_id: brave-search
     provider_type: remote::brave-search

llama_stack/templates/ollama/run.yaml

@@ -5,6 +5,7 @@ apis:
 - datasetio
 - eval
 - inference
+- post_training
 - safety
 - scoring
 - telemetry
@@ -78,6 +79,13 @@ providers:
     provider_type: inline::braintrust
     config:
       openai_api_key: ${env.OPENAI_API_KEY:}
+  post_training:
+  - provider_id: huggingface
+    provider_type: inline::huggingface
+    config:
+      checkpoint_format: huggingface
+      distributed_backend: null
+      device: cpu
   tool_runtime:
   - provider_id: brave-search
     provider_type: remote::brave-search

pyproject.toml

@@ -45,6 +45,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest",
+    "pytest-timeout",
     "pytest-asyncio",
     "pytest-cov",
     "pytest-html",

requirements.txt

@@ -1,206 +1,69 @@
 # This file was autogenerated by uv via the following command:
 #    uv export --frozen --no-hashes --no-emit-project --output-file=requirements.txt
 annotated-types==0.7.0
-    # via pydantic
 anyio==4.8.0
-    # via
-    #   httpx
-    #   llama-stack-client
-    #   openai
 attrs==25.1.0
-    # via
-    #   jsonschema
-    #   referencing
 blobfile==3.0.0
-    # via llama-stack
 cachetools==5.5.2
-    # via google-auth
 certifi==2025.1.31
-    # via
-    #   httpcore
-    #   httpx
-    #   kubernetes
-    #   requests
 charset-normalizer==3.4.1
-    # via requests
 click==8.1.8
-    # via llama-stack-client
 colorama==0.4.6 ; sys_platform == 'win32'
-    # via
-    #   click
-    #   tqdm
 distro==1.9.0
-    # via
-    #   llama-stack-client
-    #   openai
 durationpy==0.9
-    # via kubernetes
 exceptiongroup==1.2.2 ; python_full_version < '3.11'
-    # via anyio
 filelock==3.17.0
-    # via
-    #   blobfile
-    #   huggingface-hub
 fire==0.7.0
-    # via llama-stack
 fsspec==2024.12.0
-    # via huggingface-hub
 google-auth==2.38.0
-    # via kubernetes
 h11==0.16.0
-    # via
-    #   httpcore
-    #   llama-stack
 httpcore==1.0.9
-    # via httpx
 httpx==0.28.1
-    # via
-    #   llama-stack
-    #   llama-stack-client
-    #   openai
 huggingface-hub==0.29.0
-    # via llama-stack
 idna==3.10
-    # via
-    #   anyio
-    #   httpx
-    #   requests
 jinja2==3.1.6
-    # via llama-stack
 jiter==0.8.2
-    # via openai
 jsonschema==4.23.0
-    # via llama-stack
 jsonschema-specifications==2024.10.1
-    # via jsonschema
 kubernetes==32.0.1
-    # via llama-stack
 llama-stack-client==0.2.7
-    # via llama-stack
 lxml==5.3.1
-    # via blobfile
 markdown-it-py==3.0.0
-    # via rich
 markupsafe==3.0.2
-    # via jinja2
 mdurl==0.1.2
-    # via markdown-it-py
 numpy==2.2.3
-    # via pandas
 oauthlib==3.2.2
-    # via
-    #   kubernetes
-    #   requests-oauthlib
 openai==1.71.0
-    # via llama-stack
 packaging==24.2
-    # via huggingface-hub
 pandas==2.2.3
-    # via llama-stack-client
 pillow==11.1.0
-    # via llama-stack
 prompt-toolkit==3.0.50
-    # via
-    #   llama-stack
-    #   llama-stack-client
 pyaml==25.1.0
-    # via llama-stack-client
 pyasn1==0.6.1
-    # via
-    #   pyasn1-modules
-    #   rsa
 pyasn1-modules==0.4.2
-    # via google-auth
 pycryptodomex==3.21.0
-    # via blobfile
 pydantic==2.10.6
-    # via
-    #   llama-stack
-    #   llama-stack-client
-    #   openai
 pydantic-core==2.27.2
-    # via pydantic
 pygments==2.19.1
-    # via rich
 python-dateutil==2.9.0.post0
-    # via
-    #   kubernetes
-    #   pandas
 python-dotenv==1.0.1
-    # via llama-stack
 pytz==2025.1
-    # via pandas
 pyyaml==6.0.2
-    # via
-    #   huggingface-hub
-    #   kubernetes
-    #   pyaml
 referencing==0.36.2
-    # via
-    #   jsonschema
-    #   jsonschema-specifications
 regex==2024.11.6
-    # via tiktoken
 requests==2.32.3
-    # via
-    #   huggingface-hub
-    #   kubernetes
-    #   llama-stack
-    #   requests-oauthlib
-    #   tiktoken
 requests-oauthlib==2.0.0
-    # via kubernetes
 rich==13.9.4
-    # via
-    #   llama-stack
-    #   llama-stack-client
 rpds-py==0.22.3
-    # via
-    #   jsonschema
-    #   referencing
 rsa==4.9
-    # via google-auth
 setuptools==75.8.0
-    # via llama-stack
 six==1.17.0
-    # via
-    #   kubernetes
-    #   python-dateutil
 sniffio==1.3.1
-    # via
-    #   anyio
-    #   llama-stack-client
-    #   openai
 termcolor==2.5.0
-    # via
-    #   fire
-    #   llama-stack
-    #   llama-stack-client
 tiktoken==0.9.0
-    # via llama-stack
 tqdm==4.67.1
-    # via
-    #   huggingface-hub
-    #   llama-stack-client
-    #   openai
 typing-extensions==4.12.2
-    # via
-    #   anyio
-    #   huggingface-hub
-    #   llama-stack-client
-    #   openai
-    #   pydantic
-    #   pydantic-core
-    #   referencing
-    #   rich
 tzdata==2025.1
-    # via pandas
 urllib3==2.3.0
-    # via
-    #   blobfile
-    #   kubernetes
-    #   requests
 wcwidth==0.2.13
-    # via prompt-toolkit
 websocket-client==1.8.0
-    # via kubernetes

tests/integration/post_training/test_post_training.py

@@ -4,20 +4,38 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
+import logging
+import sys
+import time
+import uuid
+
 import pytest
 
-from llama_stack.apis.common.job_types import JobStatus
 from llama_stack.apis.post_training import (
-    Checkpoint,
     DataConfig,
     LoraFinetuningConfig,
-    OptimizerConfig,
-    PostTrainingJob,
-    PostTrainingJobArtifactsResponse,
-    PostTrainingJobStatusResponse,
     TrainingConfig,
 )
 
+# Configure logging
+logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s", force=True)
+logger = logging.getLogger(__name__)
+
+
+@pytest.fixture(autouse=True)
+def capture_output(capsys):
+    """Fixture to capture and display output during test execution."""
+    yield
+    captured = capsys.readouterr()
+    if captured.out:
+        print("\nCaptured stdout:", captured.out)
+    if captured.err:
+        print("\nCaptured stderr:", captured.err)
+
+
+# Force flush stdout to see prints immediately
+sys.stdout.reconfigure(line_buffering=True)
+
 # How to run this test:
 #
 # pytest llama_stack/providers/tests/post_training/test_post_training.py
@@ -25,10 +43,31 @@ from llama_stack.apis.post_training import (
 #   -v -s --tb=short --disable-warnings
 
 
-@pytest.mark.skip(reason="FIXME FIXME @yanxi0830 this needs to be migrated to use the API")
 class TestPostTraining:
-    @pytest.mark.asyncio
-    async def test_supervised_fine_tune(self, post_training_stack):
+    @pytest.mark.integration
+    @pytest.mark.parametrize(
+        "purpose, source",
+        [
+            (
+                "post-training/messages",
+                {
+                    "type": "uri",
+                    "uri": "huggingface://datasets/llamastack/simpleqa?split=train",
+                },
+            ),
+        ],
+    )
+    @pytest.mark.timeout(360)  # 6 minutes timeout
+    def test_supervised_fine_tune(self, llama_stack_client, purpose, source):
+        logger.info("Starting supervised fine-tuning test")
+
+        # register dataset to train
+        dataset = llama_stack_client.datasets.register(
+            purpose=purpose,
+            source=source,
+        )
+        logger.info(f"Registered dataset with ID: {dataset.identifier}")
+
         algorithm_config = LoraFinetuningConfig(
             type="LoRA",
             lora_attn_modules=["q_proj", "v_proj", "output_proj"],
@@ -39,62 +78,74 @@ class TestPostTraining:
         )
 
         data_config = DataConfig(
-            dataset_id="alpaca",
+            dataset_id=dataset.identifier,
             batch_size=1,
             shuffle=False,
+            data_format="instruct",
         )
 
-        optimizer_config = OptimizerConfig(
-            optimizer_type="adamw",
-            lr=3e-4,
-            lr_min=3e-5,
-            weight_decay=0.1,
-            num_warmup_steps=100,
-        )
-
+        # setup training config with minimal settings
         training_config = TrainingConfig(
             n_epochs=1,
             data_config=data_config,
-            optimizer_config=optimizer_config,
             max_steps_per_epoch=1,
             gradient_accumulation_steps=1,
         )
-        post_training_impl = post_training_stack
-        response = await post_training_impl.supervised_fine_tune(
-            job_uuid="1234",
-            model="Llama3.2-3B-Instruct",
+
+        job_uuid = f"test-job{uuid.uuid4()}"
+        logger.info(f"Starting training job with UUID: {job_uuid}")
+
+        # train with HF trl SFTTrainer as the default
+        _ = llama_stack_client.post_training.supervised_fine_tune(
+            job_uuid=job_uuid,
+            model="ibm-granite/granite-3.3-2b-instruct",
             algorithm_config=algorithm_config,
             training_config=training_config,
             hyperparam_search_config={},
             logger_config={},
-            checkpoint_dir="null",
+            checkpoint_dir=None,
         )
-        assert isinstance(response, PostTrainingJob)
-        assert response.job_uuid == "1234"
 
-    @pytest.mark.asyncio
-    async def test_get_training_jobs(self, post_training_stack):
-        post_training_impl = post_training_stack
-        jobs_list = await post_training_impl.get_training_jobs()
-        assert isinstance(jobs_list, list)
-        assert jobs_list[0].job_uuid == "1234"
+        while True:
+            status = llama_stack_client.post_training.job.status(job_uuid=job_uuid)
+            if not status:
+                logger.error("Job not found")
+                break
 
-    @pytest.mark.asyncio
-    async def test_get_training_job_status(self, post_training_stack):
-        post_training_impl = post_training_stack
-        job_status = await post_training_impl.get_training_job_status("1234")
-        assert isinstance(job_status, PostTrainingJobStatusResponse)
-        assert job_status.job_uuid == "1234"
-        assert job_status.status == JobStatus.completed
-        assert isinstance(job_status.checkpoints[0], Checkpoint)
+            logger.info(f"Current status: {status}")
+            if status.status == "completed":
+                break
 
-    @pytest.mark.asyncio
-    async def test_get_training_job_artifacts(self, post_training_stack):
-        post_training_impl = post_training_stack
-        job_artifacts = await post_training_impl.get_training_job_artifacts("1234")
-        assert isinstance(job_artifacts, PostTrainingJobArtifactsResponse)
-        assert job_artifacts.job_uuid == "1234"
-        assert isinstance(job_artifacts.checkpoints[0], Checkpoint)
-        assert job_artifacts.checkpoints[0].identifier == "Llama3.2-3B-Instruct-sft-0"
-        assert job_artifacts.checkpoints[0].epoch == 0
-        assert "/.llama/checkpoints/Llama3.2-3B-Instruct-sft-0" in job_artifacts.checkpoints[0].path
+            logger.info("Waiting for job to complete...")
+            time.sleep(10)  # Increased sleep time to reduce polling frequency
+
+        artifacts = llama_stack_client.post_training.job.artifacts(job_uuid=job_uuid)
+        logger.info(f"Job artifacts: {artifacts}")
+
+    # TODO: Fix these tests to properly represent the Jobs API in training
+    # @pytest.mark.asyncio
+    # async def test_get_training_jobs(self, post_training_stack):
+    #     post_training_impl = post_training_stack
+    #     jobs_list = await post_training_impl.get_training_jobs()
+    #     assert isinstance(jobs_list, list)
+    #     assert jobs_list[0].job_uuid == "1234"
+
+    # @pytest.mark.asyncio
+    # async def test_get_training_job_status(self, post_training_stack):
+    #     post_training_impl = post_training_stack
+    #     job_status = await post_training_impl.get_training_job_status("1234")
+    #     assert isinstance(job_status, PostTrainingJobStatusResponse)
+    #     assert job_status.job_uuid == "1234"
+    #     assert job_status.status == JobStatus.completed
+    #     assert isinstance(job_status.checkpoints[0], Checkpoint)
+
+    # @pytest.mark.asyncio
+    # async def test_get_training_job_artifacts(self, post_training_stack):
+    #     post_training_impl = post_training_stack
+    #     job_artifacts = await post_training_impl.get_training_job_artifacts("1234")
+    #     assert isinstance(job_artifacts, PostTrainingJobArtifactsResponse)
+    #     assert job_artifacts.job_uuid == "1234"
+    #     assert isinstance(job_artifacts.checkpoints[0], Checkpoint)
+    #     assert job_artifacts.checkpoints[0].identifier == "instructlab/granite-7b-lab"
+    #     assert job_artifacts.checkpoints[0].epoch == 0
+    # assert "/.llama/checkpoints/Llama3.2-3B-Instruct-sft-0" in job_artifacts.checkpoints[0].path

uv.lock

@@ -1459,6 +1459,7 @@ dev = [
     { name = "pytest-cov" },
     { name = "pytest-html" },
     { name = "pytest-json-report" },
+    { name = "pytest-timeout" },
     { name = "ruamel-yaml" },
     { name = "ruff" },
     { name = "types-requests" },
@@ -1557,6 +1558,7 @@ requires-dist = [
     { name = "pytest-cov", marker = "extra == 'dev'" },
     { name = "pytest-html", marker = "extra == 'dev'" },
     { name = "pytest-json-report", marker = "extra == 'dev'" },
+    { name = "pytest-timeout", marker = "extra == 'dev'" },
     { name = "python-dotenv" },
     { name = "qdrant-client", marker = "extra == 'unit'" },
     { name = "requests" },
@@ -2852,6 +2854,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/3e/43/7e7b2ec865caa92f67b8f0e9231a798d102724ca4c0e1f414316be1c1ef2/pytest_metadata-3.1.1-py3-none-any.whl", hash = "sha256:c8e0844db684ee1c798cfa38908d20d67d0463ecb6137c72e91f418558dd5f4b", size = 11428, upload-time = "2024-02-12T19:38:42.531Z" },
 ]
 
+[[package]]
+name = "pytest-timeout"
+version = "2.4.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pytest" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/ac/82/4c9ecabab13363e72d880f2fb504c5f750433b2b6f16e99f4ec21ada284c/pytest_timeout-2.4.0.tar.gz", hash = "sha256:7e68e90b01f9eff71332b25001f85c75495fc4e3a836701876183c4bcfd0540a", size = 17973, upload-time = "2025-05-05T19:44:34.99Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/fa/b6/3127540ecdf1464a00e5a01ee60a1b09175f6913f0644ac748494d9c4b21/pytest_timeout-2.4.0-py3-none-any.whl", hash = "sha256:c42667e5cdadb151aeb5b26d114aff6bdf5a907f176a007a30b940d3d865b5c2", size = 14382, upload-time = "2025-05-05T19:44:33.502Z" },
+]
+
 [[package]]
 name = "python-dateutil"
 version = "2.9.0.post0"