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https://github.com/langflow-ai/langflow.git
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599878da1d
* fix: pre-create LANGFLOW_CONFIG_DIR in docker images to fix named volume permissions The Langflow runtime stage runs as uid=1000 (non-root user), but the official docker_example compose file mounts a named volume at /app/langflow (LANGFLOW_CONFIG_DIR). When Docker creates a fresh named volume, it copies the ownership and permissions of the mount-point directory from the image. Because /app/langflow did not exist in the image, Docker materialized the mount point as root:root, and the non-root container user could not write secret_key, profile_pictures, or per-user subfolders. The container crashed during initialization with PermissionError on /app/langflow/secret_key. Pre-create /app/langflow in every runtime stage and chown it to 1000:0 so a fresh named volume inherits the correct ownership and the container starts cleanly on a rootful Docker daemon. Podman's rootless user-namespace mapping masked this for anyone who validated the compose file on Podman; on a rootful Docker daemon the container exits in a restart loop. Fixes #10437 * revert: drop docker_example/README.md changes The Troubleshooting note will live in the user-facing docs site instead of the in-repo README.
121 lines
4.4 KiB
Docker
121 lines
4.4 KiB
Docker
# syntax=docker/dockerfile:1
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# Keep this syntax directive! It's used to enable Docker BuildKit
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#
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# Backend-only Langflow image
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# - No frontend code or assets
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# - No Playwright
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################################
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# BUILDER
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################################
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FROM ghcr.io/astral-sh/uv:python3.14-trixie-slim AS builder
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WORKDIR /app
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# Required for apify-client
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ENV RUSTFLAGS='--cfg reqwest_unstable'
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# Install build dependencies
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RUN apt-get update \
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&& apt-get upgrade -y \
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&& apt-get install --no-install-recommends -y \
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build-essential \
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gcc \
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git \
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curl \
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&& apt-get clean \
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&& rm -rf /var/lib/apt/lists/*
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# Copy only backend source (excludes frontend)
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COPY ./src/backend ./src/backend
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COPY ./src/lfx ./src/lfx
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COPY ./src/sdk ./src/sdk
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# Workspace bundles (LE-1023 pilot+): each Bundle is shipped as a
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# separate distribution that langflow-base depends on by name (e.g.
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# ``lfx-duckduckgo``). Without copying the source tree, the install
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# below cannot resolve the path-based bundle deps and ends up with a
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# Langflow image missing components that previously lived in lfx.
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COPY ./src/bundles ./src/bundles
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# Create venv and install langflow-base with dependencies
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# Using uv pip instead of uv sync to avoid workspace complexities
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RUN uv venv /app/.venv
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ENV PATH="/app/.venv/bin:$PATH"
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ENV VIRTUAL_ENV="/app/.venv"
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# Install langflow-base with all extras except dev (which includes Playwright).
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# Each pilot-extracted bundle is installed alongside so the runtime image
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# keeps shipping the same component set users had before LE-1023.
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RUN --mount=type=cache,target=/root/.cache/uv \
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uv pip install \
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./src/sdk \
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./src/lfx \
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./src/bundles/duckduckgo \
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./src/bundles/arxiv \
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"./src/backend/base[complete,postgresql]"
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################################
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# RUNTIME
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################################
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FROM python:3.14-slim-trixie AS runtime
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# Install minimal runtime dependencies
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RUN apt-get update \
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&& apt-get upgrade -y \
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&& apt-get install --no-install-recommends -y \
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curl \
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git \
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libpq5 \
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gnupg \
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xz-utils \
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&& apt-get clean \
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&& rm -rf /var/lib/apt/lists/*
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COPY --from=builder /usr/local/bin/uv /usr/local/bin/uv
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COPY --from=builder /usr/local/bin/uvx /usr/local/bin/uvx
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# Install Node.js (required for npx-based MCP stdio servers)
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RUN ARCH=$(dpkg --print-architecture) \
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&& if [ "$ARCH" = "amd64" ]; then NODE_ARCH="x64"; \
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elif [ "$ARCH" = "arm64" ]; then NODE_ARCH="arm64"; \
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else NODE_ARCH="$ARCH"; fi \
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&& NODE_VERSION=$(curl -fsSL https://nodejs.org/dist/latest-v22.x/ \
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| sed -nE "s/.*node-v([0-9]+\.[0-9]+\.[0-9]+)-linux-${NODE_ARCH}\.tar\.xz.*/\1/p" \
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| head -1) \
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&& if [ -z "$NODE_VERSION" ]; then echo "ERROR: Could not determine Node.js version" && exit 1; fi \
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&& curl -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-${NODE_ARCH}.tar.xz" \
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| tar -xJ -C /usr/local --strip-components=1
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# Create non-root user
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RUN useradd --uid 1000 --gid 0 --no-create-home --home-dir /app/data user
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# Copy only the virtual environment
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COPY --from=builder --chown=1000:0 /app/.venv /app/.venv
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ENV PATH="/app/.venv/bin:$PATH"
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# Create home directory and ensure proper ownership
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# The user needs write access to /app/data (home) and /app (workdir).
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# Also pre-create /app/langflow (LANGFLOW_CONFIG_DIR used by the docker_example
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# compose file) with the non-root user as owner, so a fresh named volume mounted
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# at /app/langflow inherits the correct ownership/permissions and the in-container
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# uid=1000 user can write secret_key, profile_pictures, etc. Without this, the
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# volume would be initialized as root:root and Langflow would crash with
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# PermissionError on /app/langflow/secret_key (issue #10437).
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# Note: .venv is already owned by 1000:0 via COPY --chown above, so no recursive chown needed
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RUN mkdir -p /app/data /app/langflow \
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&& chown -R 1000:0 /app/data /app/langflow \
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&& chmod -R g+rwX /app/langflow \
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&& chown 1000:0 /app
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LABEL org.opencontainers.image.title=langflow-backend
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LABEL org.opencontainers.image.authors=['Langflow']
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LABEL org.opencontainers.image.licenses=MIT
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LABEL org.opencontainers.image.url=https://github.com/langflow-ai/langflow
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LABEL org.opencontainers.image.source=https://github.com/langflow-ai/langflow
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USER user
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WORKDIR /app
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ENV LANGFLOW_HOST=0.0.0.0
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ENV LANGFLOW_PORT=7860
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CMD ["python", "-m", "langflow", "run", "--backend-only"]
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