Dockerfile

# Multi-stage Dockerfile for production-ready Iris Classification API

# Stage 1: Builder
FROM python:3.10-slim as builder

# Set working directory
WORKDIR /app

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    g++ \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements
COPY requirements.txt .
COPY requirements-api.txt .

# Install Python dependencies
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt && \
    pip install --no-cache-dir -r requirements-api.txt

# Stage 2: Runtime
FROM python:3.10-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    APP_HOME=/app \
    PORT=8000

# Create non-root user
RUN groupadd -r appuser && useradd -r -g appuser appuser

# Set working directory
WORKDIR $APP_HOME

# Copy Python packages from builder
COPY --from=builder /usr/local/lib/python3.10/site-packages /usr/local/lib/python3.10/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Copy application code
COPY --chown=appuser:appuser src/ src/
COPY --chown=appuser:appuser setup.py .
COPY --chown=appuser:appuser README.md .
COPY --chown=appuser:appuser LICENSE .

# Install the package
RUN pip install --no-cache-dir -e .

# Create necessary directories
RUN mkdir -p models data logs && \
    chown -R appuser:appuser models data logs

# Switch to non-root user
USER appuser

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import requests; requests.get('http://localhost:${PORT}/health')" || exit 1

# Expose port
EXPOSE $PORT

# Run the API
CMD ["python", "-m", "uvicorn", "iris_classifier.api:app", "--host", "0.0.0.0", "--port", "8000"]