langflow/docker/build_and_push_base.Dockerfile

# syntax=docker/dockerfile:1
# Keep this syntax directive! It's used to enable Docker BuildKit


################################
# BUILDER-BASE
# Used to build deps + create our virtual environment
################################

# 1. use python:3.12.3-slim as the base image until https://github.com/pydantic/pydantic-core/issues/1292 gets resolved
# 2. do not add --platform=$BUILDPLATFORM because the pydantic binaries must be resolved for the final architecture
# Use a Python image with uv pre-installed
FROM ghcr.io/astral-sh/uv:python3.14-trixie-slim AS builder

# Install the project into `/app`
WORKDIR /app

# Enable bytecode compilation
ENV UV_COMPILE_BYTECODE=1

# Copy from the cache instead of linking since it's a mounted volume
ENV UV_LINK_MODE=copy

# Set RUSTFLAGS for reqwest unstable features needed by apify-client v2.0.0
ENV RUSTFLAGS='--cfg reqwest_unstable'

RUN apt-get update \
    && apt-get upgrade -y \
    && apt-get install --no-install-recommends -y \
    # deps for building python deps
    build-essential \
    git \
    # npm
    npm \
    # gcc
    gcc \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Copy files first to avoid permission issues with bind mounts
COPY ./uv.lock /app/uv.lock
COPY ./README.md /app/README.md
COPY ./pyproject.toml /app/pyproject.toml
COPY ./src/backend/base/README.md /app/src/backend/base/README.md
COPY ./src/backend/base/pyproject.toml /app/src/backend/base/pyproject.toml
# Copy lfx metadata files since it's a workspace member
COPY ./src/lfx/pyproject.toml /app/src/lfx/pyproject.toml
COPY ./src/lfx/README.md /app/src/lfx/README.md
# Copy sdk metadata files since it's a workspace member
COPY ./src/sdk/pyproject.toml /app/src/sdk/pyproject.toml
COPY ./src/sdk/README.md /app/src/sdk/README.md
# Workspace bundles (LE-1023 pilot+): every directory under ``src/bundles``
# is a uv workspace member, so each bundle's pyproject.toml must be present
# for ``uv sync --no-install-project`` to resolve the workspace.  Copy the
# whole tree once rather than enumerating each bundle, so a new bundle does
# not require a Dockerfile edit.
COPY ./src/bundles /app/src/bundles

# Install the project's dependencies using the lockfile and settings
# We need to mount the root uv.lock and pyproject.toml to build the base with uv because we're still using uv workspaces
RUN --mount=type=cache,target=/root/.cache/uv \
    RUSTFLAGS='--cfg reqwest_unstable' \
    cd src/backend/base && uv sync --frozen --no-install-project --no-dev --no-editable --extra postgresql

COPY ./src /app/src

COPY src/frontend /tmp/src/frontend
WORKDIR /tmp/src/frontend
# Increase memory and disable concurrent builds to avoid esbuild crashes on emulated architectures
# Force esbuild to use JS implementation on emulated architectures to avoid native binary crashes
RUN npm install \
    && ESBUILD_BINARY_PATH="" NODE_OPTIONS="--max-old-space-size=4096" JOBS=1 npm run build \
    && cp -r build /app/src/backend/base/langflow/frontend \
    && rm -rf /tmp/src/frontend

WORKDIR /app/src/backend/base
# langflow-base ships the core framework only.  The extension bundles
# (lfx-duckduckgo, lfx-arxiv, lfx-ibm, lfx-docling, lfx-firecrawl) are intentionally NOT
# installed in this image: they are dependencies of the full ``langflow``
# distribution, not of the lean ``langflow-base`` core, and we keep that
# boundary at the image layer too.  Consumers who want those components
# should use the ``langflow`` image, or ``pip install`` the bundle (e.g.
# ``lfx-duckduckgo``) alongside langflow-base.
RUN --mount=type=cache,target=/root/.cache/uv \
    RUSTFLAGS='--cfg reqwest_unstable' \
    uv sync --frozen --no-dev --no-editable --extra postgresql

################################
# RUNTIME
# Setup user, utilities and copy the virtual environment only
################################
FROM python:3.14-slim-trixie AS runtime


RUN apt-get update \
    && apt-get upgrade -y \
    && apt-get install --no-install-recommends -y curl git libpq5 gnupg xz-utils \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*
COPY --from=builder /usr/local/bin/uv /usr/local/bin/uv
COPY --from=builder /usr/local/bin/uvx /usr/local/bin/uvx
RUN ARCH=$(dpkg --print-architecture) \
    && if [ "$ARCH" = "amd64" ]; then NODE_ARCH="x64"; \
       elif [ "$ARCH" = "arm64" ]; then NODE_ARCH="arm64"; \
       else NODE_ARCH="$ARCH"; fi \
    && NODE_VERSION=$(curl -fsSL https://nodejs.org/dist/latest-v22.x/ \
                    | sed -nE "s/.*node-v([0-9]+\.[0-9]+\.[0-9]+)-linux-${NODE_ARCH}\.tar\.xz.*/\1/p" \
                    | head -1) \
    && if [ -z "$NODE_VERSION" ]; then echo "ERROR: Could not determine Node.js version" && exit 1; fi \
    && curl -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-${NODE_ARCH}.tar.xz" \
    | tar -xJ -C /usr/local --strip-components=1
RUN useradd user -u 1000 -g 0 --no-create-home --home-dir /app/data

COPY --from=builder --chown=1000 /app/.venv /app/.venv
ENV PATH="/app/.venv/bin:$PATH"

# Pre-create LANGFLOW_CONFIG_DIR (the default location used by the docker_example
# compose file) with the non-root user as owner. When the official compose mounts
# a fresh named volume at /app/langflow, Docker copies this directory's ownership
# and permissions into the new volume, so the in-container uid=1000 user can
# write secret_key, profile_pictures, etc. Without this, the volume is created
# as root:root and Langflow crashes during startup with PermissionError on
# /app/langflow/secret_key. See https://github.com/langflow-ai/langflow/issues/10437
RUN mkdir -p /app/langflow && chown -R 1000:0 /app/langflow && chmod -R g+rwX /app/langflow

LABEL org.opencontainers.image.title=langflow
LABEL org.opencontainers.image.authors=['Langflow']
LABEL org.opencontainers.image.licenses=MIT
LABEL org.opencontainers.image.url=https://github.com/langflow-ai/langflow
LABEL org.opencontainers.image.source=https://github.com/langflow-ai/langflow

USER user
WORKDIR /app

ENV LANGFLOW_HOST=0.0.0.0
ENV LANGFLOW_PORT=7860

CMD ["langflow-base", "run"]