Dockerfile.alpine

# Alpine-based Dockerfile for knowledgebase-processor
# Smaller image size but requires more careful dependency management

# Build stage
FROM python:3.12-alpine as builder

# Install build dependencies for Alpine
# Note: Alpine uses musl libc which can cause compatibility issues
RUN apk add --no-cache \
    gcc \
    g++ \
    musl-dev \
    linux-headers \
    python3-dev \
    openblas-dev \
    gfortran \
    build-base \
    cmake \
    # Required for some Python packages
    libffi-dev \
    openssl-dev

# Install poetry
RUN pip install --no-cache-dir poetry==1.8.2

WORKDIR /app

# Copy dependency files
COPY pyproject.toml poetry.lock ./

# Configure poetry
RUN poetry config virtualenvs.create false

# Install dependencies - longer build time due to compilation
RUN poetry install --no-interaction --no-ansi --no-root --only main

# Copy and install application
COPY src/ ./src/
COPY README.md ./
RUN poetry install --no-interaction --no-ansi --only-root

# Runtime stage
FROM python:3.12-alpine

# Install runtime dependencies only
RUN apk add --no-cache \
    openblas \
    libgfortran \
    libstdc++ \
    # For health checks
    curl

# Create non-root user
RUN adduser -D -u 1000 kbuser

# Copy from builder
COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

WORKDIR /app
COPY --from=builder /app/src ./src
COPY pyproject.toml README.md ./

# Create data directories
RUN mkdir -p /app/data /app/output /app/metadata && \
    chown -R kbuser:kbuser /app

USER kbuser

ENV PYTHONUNBUFFERED=1

HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD kb --version || exit 1

CMD ["kb", "--help"]