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deepseek-kubernetes-sandbox/examples/dsh-agents-as-a-service/gateway/Dockerfile
SREDevOps.org Agent 1a929e3e24 fix(gateway)!: replace token cookies with revocable sessions and harden abuse controls (#40)
- Replace user:token cookies with opaque server-side sessions, revocable on logout, delete, recreate and expiry; bind every credential to the path user and add cross-user regression tests.
- Rate-limit /users and /login, add optional signup invite codes and form same-origin checks, and unify login failures to 401.
- Require explicit ALLOW_INSECURE_COOKIES for plain HTTP, use __Host-dsh_gw_session when secure, and fix secure cookie deletion.
- Strip client-supplied forwarding/SSO headers, add an optional upstream allowlist, per-user in-flight and WebSocket message caps, credential-free handshake errors, and sweep-time state pruning.
- Digest-pin base images, hash-pin gateway dependencies, verify DSH_COMMIT in the build, and run the gateway image as non-root with a pinned Python base.
- Update manifests, production checklist, architecture/security docs and add an SSO preflight script.

BREAKING CHANGE: existing dsh_gw_session=<user>:<token> cookies are invalid; users must sign in again. Unknown users on POST /login now return 401 instead of 404, and the gateway refuses COOKIE_SECURE=false unless ALLOW_INSECURE_COOKIES=1.

Co-authored-by: SREDevOpsAgents <agents@sredevops.org>
2026-10-31 00:57:35 -03:00

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Docker

# syntax=docker/dockerfile:1.7
#
# Example gateway image: the tenant-facing proxy in front of DSH sandboxes.
# The base image is digest-pinned in versions.env (GATEWAY_PYTHON_IMAGE) and
# scripts/check-versions.sh verifies the ARG default below.
#
# Two stages on that base:
# build installs the fully hash-pinned runtime dependencies into /venv as
# a dedicated non-root UID, so the runtime stage copies a venv that
# contains no root-owned files.
# runtime copies /venv and the app, runs as UID 10000 with HOME=/tmp and no
# writable location of its own: usable with readOnlyRootFilesystem.
ARG GATEWAY_PYTHON_IMAGE=docker.io/python:3.12-slim@sha256:aa943ce411423c7582288f18707ff66eddcbaeb510502d747a72aeb34f30d159
# ---------------------------------------------------------------------------
# Build stage: hash-pinned virtualenv owned by the runtime identity.
# ---------------------------------------------------------------------------
FROM $GATEWAY_PYTHON_IMAGE AS build
ARG APP_UID=10000
ARG APP_GID=10000
# No .pyc writes and no user cache dirs: the runtime image stays read-only.
ENV PYTHONDONTWRITEBYTECODE=1 \
PYTHONUNBUFFERED=1 \
PIP_NO_CACHE_DIR=1 \
HOME=/tmp
RUN groupadd --gid "$APP_GID" app \
&& useradd --uid "$APP_UID" --gid "$APP_GID" --no-create-home \
--home-dir /tmp --shell /usr/sbin/nologin app \
&& python -m venv /venv \
&& chown -R "$APP_UID:$APP_GID" /venv
WORKDIR /build
COPY requirements.txt .
# Install as the unprivileged user so every file in /venv is owned by UID 10000.
# --require-hashes makes pip reject any requirement without a matching hash:
# the dependency set in requirements.txt is fully pinned and verified. Use the
# venv's own pip: the system pip would user-install into $HOME instead.
USER $APP_UID:$APP_GID
RUN /venv/bin/pip install --no-cache-dir --require-hashes -r requirements.txt
# ---------------------------------------------------------------------------
# Runtime stage
# ---------------------------------------------------------------------------
FROM $GATEWAY_PYTHON_IMAGE AS runtime
ARG APP_UID=10000
ARG APP_GID=10000
ENV PYTHONDONTWRITEBYTECODE=1 \
PYTHONUNBUFFERED=1 \
HOME=/tmp \
PATH="/venv/bin:$PATH"
RUN groupadd --gid "$APP_GID" app \
&& useradd --uid "$APP_UID" --gid "$APP_GID" --no-create-home \
--home-dir /tmp --shell /usr/sbin/nologin app
WORKDIR /app
# Dependencies come from the build stage: same interpreter, no build tools left
# in the runtime image and nothing owned by root inside /venv.
COPY --from=build --chown=$APP_UID:$APP_GID /venv /venv
COPY --chown=$APP_UID:$APP_GID gateway.py .
EXPOSE 8080
# Run as a fixed non-root UID; HOME=/tmp keeps caches out of the image.
USER 10000
CMD ["uvicorn", "gateway:create_app", "--factory", \
"--host", "0.0.0.0", "--port", "8080", "--no-access-log"]