52 lines
1.9 KiB
Docker
52 lines
1.9 KiB
Docker
# syntax=docker/dockerfile:1.7
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# ============================================================================
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# Build stage: create a self-contained venv with all dependencies
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# ============================================================================
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FROM python:3.11-slim-bookworm AS builder
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ENV PYTHONDONTWRITEBYTECODE=1 \
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PYTHONUNBUFFERED=1 \
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PIP_NO_CACHE_DIR=1 \
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PIP_DISABLE_PIP_VERSION_CHECK=1
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# --copies bundles the Python binary itself into /opt/venv so the runtime
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# stage gets a self-contained tree (no symlinks back to /usr/local/bin).
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RUN python -m venv --copies /opt/venv
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ENV PATH=/opt/venv/bin:$PATH
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# Install runtime deps into the venv's site-packages
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RUN pip install \
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fastapi==0.115.* \
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"uvicorn[standard]==0.30.*" \
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redis==5.0.*
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# Pre-compile bytecode for faster cold start on a read-only rootfs
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RUN python -m compileall -q /opt/venv
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# ============================================================================
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# Runtime stage: distroless Python 3.11, non-root, no shell
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# ============================================================================
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# gcr.io/distroless/python3-debian12 ships Python 3.11 with NO shell, NO
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# package manager, and NO setuid binaries. The :nonroot tag pins USER to
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# uid 65532 / gid 65532.
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FROM gcr.io/distroless/python3-debian12:nonroot
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ENV PYTHONDONTWRITEBYTECODE=1 \
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PYTHONUNBUFFERED=1
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WORKDIR /app
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# Self-contained venv (its bin/python and site-packages travel together)
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COPY --from=builder --chown=nonroot:nonroot /opt/venv /opt/venv
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# Application source (its own layer so source-only changes don't bust dep cache)
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COPY --chown=nonroot:nonroot app.py favicon.ico /app/
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USER nonroot
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EXPOSE 8000
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# Invoking the venv's Python directly makes its site-packages discoverable
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# automatically (sys.prefix points inside /opt/venv) — no PYTHONPATH needed.
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ENTRYPOINT ["/opt/venv/bin/python", "-m", "uvicorn"]
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CMD ["app:app", "--host", "0.0.0.0", "--port", "8000"]
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