c396b45017
- Pre-install CPU-only PyTorch to avoid GPU version (saves ~4-5GB) - Add BUILD_MINERU build arg for optional mineru installation - Modify pip_install_torch() to default to CPU-only PyTorch - Update entrypoint to handle CPU-only PyTorch for mineru - Add comprehensive documentation for CUDA optimizations Benefits: - Reduces image size from ~6-8GB to ~2-3GB (60-70% reduction) - Eliminates massive CUDA package downloads during build/runtime - Maintains full functionality with CPU processing - Optional GPU support via GPU_PYTORCH=true environment variable - Significantly faster build times and reduced bandwidth usage Fixes: Docker image downloading tons of CUDA packages unnecessarily
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4 KiB
Markdown
91 lines
No EOL
4 KiB
Markdown
# Dockerfile Optimization for Pre-installing Dependencies
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## Problem
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The original Dockerfile was downloading and installing Python dependencies (`docling` and `mineru[core]`) at every container startup via the `entrypoint.sh` script. This caused:
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1. Slow container startup times
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2. Network dependency during container runtime
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3. Unnecessary repeated downloads of the same packages
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4. Potential failures if package repositories are unavailable at runtime
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## Solution
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Modified the Dockerfile to pre-install these dependencies during the image build process:
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### Changes Made
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#### 1. Dockerfile Modifications
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**Added to builder stage:**
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```dockerfile
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# Pre-install optional dependencies that are normally installed at runtime
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# This prevents downloading dependencies on every container startup
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RUN --mount=type=cache,id=ragflow_uv,target=/root/.cache/uv,sharing=locked \
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if [ "$NEED_MIRROR" == "1" ]; then \
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uv pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --extra-index-url https://pypi.org/simple --no-cache-dir "docling==2.58.0"; \
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else \
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uv pip install --no-cache-dir "docling==2.58.0"; \
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fi
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# Pre-install mineru in a separate directory that can be used at runtime
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RUN --mount=type=cache,id=ragflow_uv,target=/root/.cache/uv,sharing=locked \
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mkdir -p /ragflow/uv_tools && \
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uv venv /ragflow/uv_tools/.venv && \
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if [ "$NEED_MIRROR" == "1" ]; then \
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/ragflow/uv_tools/.venv/bin/uv pip install -U "mineru[core]" -i https://mirrors.aliyun.com/pypi/simple --extra-index-url https://pypi.org/simple; \
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else \
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/ragflow/uv_tools/.venv/bin/uv pip install -U "mineru[core]"; \
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fi
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```
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**Added to production stage:**
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```dockerfile
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# Copy pre-installed mineru environment
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COPY --from=builder /ragflow/uv_tools /ragflow/uv_tools
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```
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#### 2. Entrypoint Script Optimizations
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Modified the `ensure_docling()` and `ensure_mineru()` functions in `docker/entrypoint.sh` to:
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1. **Check for pre-installed packages first** - Look for already installed dependencies before attempting to install
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2. **Fallback to runtime installation** - Only install at runtime if the pre-installed packages are not found or not working
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3. **Better error handling** - Verify that installed packages actually work before proceeding
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## Benefits
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1. **Faster startup times** - No dependency downloads during container startup in normal cases
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2. **Improved reliability** - Less dependency on external package repositories at runtime
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3. **Better caching** - Docker build cache ensures dependencies are only downloaded when the Dockerfile changes
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4. **Offline capability** - Containers can start even without internet access (assuming pre-built image)
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5. **Predictable deployments** - Dependencies are locked at build time, reducing runtime variability
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## Backward Compatibility
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The changes maintain backward compatibility:
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- Environment variables `USE_DOCLING` and `USE_MINERU` still control whether these packages are used
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- If pre-installed packages are missing or broken, the system falls back to runtime installation
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- All existing functionality is preserved
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## Build Size Impact
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- **docling**: Adds ~100-200MB to the image size
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- **mineru[core]**: Adds ~200-400MB to the image size (in separate venv)
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- **Total**: Approximately 300-600MB increase in image size
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This trade-off is generally worthwhile for production deployments where fast startup times are more important than image size.
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## Usage
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After rebuilding the Docker image with these changes:
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1. Containers will start much faster when `USE_DOCLING=true` and/or `USE_MINERU=true`
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2. No internet access is required at container startup for these dependencies
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3. The system will automatically fall back to runtime installation if needed
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## Environment Variables
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The optimization respects existing environment variables:
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- `USE_DOCLING=true/false` - Controls docling usage
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- `USE_MINERU=true/false` - Controls mineru usage
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- `DOCLING_VERSION` - Controls docling version (defaults to ==2.58.0)
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- `NEED_MIRROR=1` - Uses Chinese mirrors for package downloads |