Dockerfile

# Multi-stage production Dockerfile for A2A Conversation Agents
FROM python:3.12-slim AS builder

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

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

# Create virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Copy dependency files
WORKDIR /build
COPY pyproject.toml ./

# Install Python dependencies
RUN pip install --upgrade pip setuptools wheel && \
    pip install hatchling && \
    pip install python-dotenv kafka-python langchain-openai langgraph


# Production stage
FROM python:3.12-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PATH="/opt/venv/bin:$PATH"

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

# Copy virtual environment from builder
COPY --from=builder /opt/venv /opt/venv

# Set working directory
WORKDIR /app

# Copy application code
COPY --chown=appuser:appuser src/ ./src/
COPY --chown=appuser:appuser pyproject.toml ./

# Create logs directory with proper permissions
RUN mkdir -p logs && chown -R appuser:appuser logs

# Switch to non-root user
USER appuser

# Health check (optional - checks if Python can import the module)
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import src.a2a_conversation" || exit 1

# Default command
CMD ["python", "-m", "src.a2a_conversation.main"]