Dockerfile.llm-analytics

# syntax=docker/dockerfile:1
#
# Docker image for the LLM Analytics Temporal worker.
#
# Includes ML dependencies (transformers, ONNX Runtime, torch) that are too
# large (~2GB) for the shared PostHog image. These deps live in the `sentiment`
# dependency group in pyproject.toml and are installed via `uv sync --group sentiment`.
#

# Same as pyproject.toml so that uv can pick it up and doesn't need to download a different Python version.
FROM ghcr.io/astral-sh/uv:0.10.2 AS uv

FROM python:3.12.12-slim-bookworm@sha256:78e702aee4d693e769430f0d7b4f4858d8ea3f1118dc3f57fee3f757d0ca64b1
SHELL ["/bin/bash", "-e", "-o", "pipefail", "-c"]

# Copy uv
COPY --from=uv /uv /uvx /bin/

# Set working directory
WORKDIR /code

# uv settings for Docker builds
ENV UV_COMPILE_BYTECODE=1
ENV UV_LINK_MODE=copy
ENV UV_PROJECT_ENVIRONMENT=/python-runtime

# Install system dependencies
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    "build-essential" \
    "git" \
    "libpq-dev" \
    "libxmlsec1=1.2.37-2" \
    "libxmlsec1-dev=1.2.37-2" \
    "libffi-dev" \
    "zlib1g-dev" \
    "pkg-config" \
    && \
    rm -rf /var/lib/apt/lists/*

# Install Python dependencies including sentiment ML deps
RUN --mount=type=cache,id=uv-libxmlsec1.2.37-2,target=/root/.cache/uv \
    --mount=type=bind,source=uv.lock,target=uv.lock \
    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
    uv sync --locked --no-dev --no-install-project --group sentiment --no-binary-package lxml --no-binary-package xmlsec

# Copy project files
COPY manage.py manage.py
COPY common/esbuilder common/esbuilder
COPY common/hogvm common/hogvm/
COPY common/migration_utils common/migration_utils/
COPY posthog posthog/
COPY products/ products/
COPY ee ee/
COPY bin/temporal-django-worker bin/temporal-django-worker

ENV PATH=/python-runtime/bin:$PATH \
    PYTHONPATH=/python-runtime \
    POSTHOG_SENTIMENT_MODEL_CACHE=/opt/posthog-sentiment-model

# Pre-bake the sentiment ONNX model so workers don't download from HuggingFace on startup.
# Downloads from a pinned HuggingFace revision, exports to ONNX, verifies file integrity
# via SHA256 checksums, and runs a smoke test to confirm correct inference output.
#
# To update the model:
#   1. Update MODEL_REVISION to the new commit SHA from HuggingFace
#   2. Run the export locally to compute new SHA256 hashes for config.json and tokenizer.json
#   3. Update EXPECTED_HASHES below
#   4. Rebuild the image
RUN <<'BAKE_MODEL'
python -c "
import hashlib, os, sys, torch
from transformers import AutoTokenizer, pipeline
from optimum.onnxruntime import ORTModelForSequenceClassification

MODEL_NAME = 'cardiffnlp/twitter-roberta-base-sentiment-latest'
MODEL_REVISION = '3216a57f2a0d9c45a2e6c20157c20c49fb4bf9c7'

EXPECTED_HASHES = {
    'config.json': '6f9c837680f529dd63871255651ca177bc259fd7c7f64cd5a4d6fcf0c36b8863',
    'tokenizer.json': '727009a8214ddfa5af1deedf1006d4d06e8e51e54aa5f03566263d4e19bfcdce',
}

cache_dir = os.environ['POSTHOG_SENTIMENT_MODEL_CACHE']
os.makedirs(cache_dir, exist_ok=True)

tokenizer = AutoTokenizer.from_pretrained(MODEL_NAME, revision=MODEL_REVISION)

# PyTorch 2.9+ defaults torch.onnx.export to dynamo=True which breaks optimum
original_export = torch.onnx.export
def export_with_dynamo_disabled(*args, **kwargs):
    kwargs.setdefault('dynamo', False)
    return original_export(*args, **kwargs)
torch.onnx.export = export_with_dynamo_disabled

model = ORTModelForSequenceClassification.from_pretrained(MODEL_NAME, revision=MODEL_REVISION, export=True)
torch.onnx.export = original_export

model.save_pretrained(cache_dir)
tokenizer.save_pretrained(cache_dir)

for filename, expected_sha in EXPECTED_HASHES.items():
    filepath = os.path.join(cache_dir, filename)
    actual_sha = hashlib.sha256(open(filepath, 'rb').read()).hexdigest()
    if actual_sha != expected_sha:
        print(f'HASH MISMATCH for {filename}:', file=sys.stderr)
        print(f'  expected: {expected_sha}', file=sys.stderr)
        print(f'  actual:   {actual_sha}', file=sys.stderr)
        sys.exit(1)
    print(f'  verified {filename}: {actual_sha}')

pipe = pipeline('sentiment-analysis', model=model, tokenizer=tokenizer, top_k=None, truncation=True, max_length=512)
result = pipe('I love this product')[0]
labels = {r['label']: r['score'] for r in result}
assert labels.get('positive', 0) > 0.5, f'Smoke test failed: expected positive > 0.5, got {labels}'
print(f'  smoke test passed: positive={labels[\"positive\"]:.4f}')
print(f'Model baked into {cache_dir}')
"
BAKE_MODEL

RUN chmod +x bin/temporal-django-worker

CMD ["bin/temporal-django-worker"]