mirror of
https://github.com/langbot-app/LangBot.git
synced 2026-06-08 14:56:03 +00:00
c460bd7814
Compile nsjail 3.6 from source in a dedicated multi-stage build and carry only the binary plus its runtime libs (libprotobuf32, libnl-route-3-200) into the final image. This lets the Box runtime isolate sandboxed code via nsjail user/mount/pid/net namespaces without a host Docker socket — the prerequisite for running Box on LangBot Cloud (k8s), where mounting docker.sock would grant node root and is not acceptable for multi-tenant. The build toolchain (build-essential/bison/flex/protobuf-dev/libnl-dev) stays in the nsjail-build stage and is not present in the shipped image. Verified: image builds (583MB), nsjail --help exits 0, libraries resolve, and the real NsjailBackend executes an isolated command end-to-end on a v6.1/cgroup2 host matching LangBot Cloud prod (rlimit fallback path, since container /sys/fs/cgroup is read-only; PID-namespace isolation confirmed).
61 lines
2.6 KiB
Docker
61 lines
2.6 KiB
Docker
FROM node:22-alpine AS node
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WORKDIR /app
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COPY web ./web
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RUN cd web && npm install && npx vite build
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# Build nsjail from source so the image ships a self-contained sandbox backend
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# that needs no host Docker socket. Pinned to a release tag for reproducibility.
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# Multi-stage keeps the compile toolchain (bison/flex/protobuf-dev/libnl-dev)
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# out of the final image; only the nsjail binary and its small runtime libs
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# (libprotobuf, libnl-route-3) are carried over.
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FROM python:3.12.7-slim AS nsjail-build
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ARG NSJAIL_VERSION=3.6
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends \
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ca-certificates git build-essential \
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autoconf bison flex libtool pkg-config \
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protobuf-compiler libprotobuf-dev libnl-route-3-dev \
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&& git clone --depth 1 --branch "${NSJAIL_VERSION}" https://github.com/google/nsjail.git /nsjail \
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&& make -C /nsjail \
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&& install -m 0755 /nsjail/nsjail /usr/local/bin/nsjail \
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&& rm -rf /var/lib/apt/lists/*
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FROM python:3.12.7-slim
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WORKDIR /app
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COPY . .
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COPY --from=node /app/web/dist ./web/dist
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# nsjail binary built in the dedicated stage above. Self-contained sandbox
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# backend; lets the Box runtime isolate code without a host Docker socket.
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COPY --from=nsjail-build /usr/local/bin/nsjail /usr/local/bin/nsjail
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends gcc ca-certificates curl gnupg \
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# nsjail runtime libraries (the build toolchain stays in the nsjail-build
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# stage; only these shared libs are needed to execute the binary).
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&& apt-get install -y --no-install-recommends libprotobuf32 libnl-route-3-200 \
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# Install the Docker CLI (client only) so the optional langbot_box
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# service can drive the mounted host Docker socket and create sandbox
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# containers. The same image powers langbot / plugin_runtime / box; only
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# box uses the client. Arch-aware via dpkg so multi-arch builds work.
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&& install -m 0755 -d /etc/apt/keyrings \
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&& curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc \
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&& chmod a+r /etc/apt/keyrings/docker.asc \
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&& echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian $(. /etc/os-release && echo \"$VERSION_CODENAME\") stable" > /etc/apt/sources.list.d/docker.list \
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&& apt-get update \
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&& apt-get install -y --no-install-recommends docker-ce-cli \
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&& python -m pip install --no-cache-dir uv \
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&& uv sync \
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&& apt-get purge -y --auto-remove curl gnupg \
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&& rm -rf /var/lib/apt/lists/* \
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&& touch /.dockerenv
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CMD [ "uv", "run", "--no-sync", "main.py" ] |