sandbox-service/Dockerfile.sidecar

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# Aivory sandbox — sidecar image (the FastAPI control service).
#
# This is the small service that the Go backend calls (SANDBOX_BASE_URL). It
# does NOT run user code itself — it drives the Docker daemon to spawn one
# locked-down `aivory-sandbox` container per session. So it needs the docker
# CLI plus access to a Docker socket at runtime (mount /var/run/docker.sock).
#
#   docker build -f Dockerfile.sidecar -t aivory-sandbox-sidecar:latest .
#
# Supports linux/amd64 and linux/arm64. BuildKit supplies TARGETARCH and the
# install step maps it to Docker's static CLI archive naming automatically.

FROM python:3.12-slim-bookworm

ARG DOCKER_CLI_VERSION=27.3.1
ARG TARGETARCH

# Install just the docker CLI (static binary) — not the daemon. The sidecar
# talks to the host daemon over the mounted socket.
RUN set -eux; \
    target_arch="${TARGETARCH:-$(dpkg --print-architecture)}"; \
    case "$target_arch" in \
        amd64) docker_cli_arch="x86_64" ;; \
        arm64) docker_cli_arch="aarch64" ;; \
        *) echo "Unsupported target architecture: $target_arch" >&2; exit 1 ;; \
    esac; \
    apt-get update; \
    apt-get install -y --no-install-recommends curl ca-certificates; \
    docker_cli_archive="/tmp/docker-cli.tgz"; \
    curl -fsSL "https://download.docker.com/linux/static/stable/${docker_cli_arch}/docker-${DOCKER_CLI_VERSION}.tgz" \
        -o "$docker_cli_archive"; \
    tar xzf "$docker_cli_archive" --strip-components=1 -C /usr/local/bin docker/docker; \
    rm -f "$docker_cli_archive"; \
    apt-get purge -y curl; \
    apt-get autoremove -y; \
    rm -rf /var/lib/apt/lists/*; \
    docker --version

WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY app.py .

# Default points at the GHCR runtime image; override at deploy time.
ENV SANDBOX_IMAGE=aivory-sandbox:latest

EXPOSE 8000
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]