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fix: keep OAuth flow working on read-only container roots
The DCR client registry created its storage directory eagerly in __init__,
and DCR_STORAGE_PATH defaulted to /var/lib/aegis-mcp — a path that is neither
created in the image nor mounted as a writable volume. Under the hardened
read-only docker-compose, every /oauth/authorize, /oauth/token, and /register
call hit `mkdir('/var/lib/aegis-mcp')` on a read-only filesystem, raising an
unhandled OSError and returning a bare "Internal Server Error" during login.

- oauth_flow.py: defer the storage-dir mkdir from __init__ to _persist (the
  only write path). authorize/token only read the registry, so they no longer
  require a writable filesystem and stop 500-ing.
- docker/Dockerfile: create and chown /var/lib/aegis-mcp.
- docker-compose.yml + docker/docker-compose.yml: add a persistent
  aegis-mcp-data volume mounted at /var/lib/aegis-mcp so DCR registrations
  survive restarts.
- .env.example: document DCR_STORAGE_PATH and set PUBLIC_BASE_URL to the real
  MCP host.
- README.md: spell out exact values (Gitea host, MCP host, callback URL, MCP
  URL) and add a "required writable volumes" section explaining the cause of
  the login 500.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-14 16:28:52 +02:00

52 lines
1.4 KiB
Docker

# syntax=docker/dockerfile:1
# Build stage
FROM python:3.12-slim AS builder
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PIP_DISABLE_PIP_VERSION_CHECK=1
WORKDIR /app
RUN apt-get update \
&& apt-get install -y --no-install-recommends gcc \
&& rm -rf /var/lib/apt/lists/*
COPY requirements.txt ./
RUN pip install --no-cache-dir --user -r requirements.txt
# Runtime stage
FROM python:3.12-slim
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PIP_DISABLE_PIP_VERSION_CHECK=1
ENV NODE_ENV=production
ENV ENVIRONMENT=production
ENV PATH=/home/aegis/.local/bin:$PATH
ENV PYTHONPATH=/app/src:$PYTHONPATH
WORKDIR /app
# Non-root runtime user
RUN useradd -m -u 1000 -s /usr/sbin/nologin aegis
COPY --from=builder --chown=aegis:aegis /root/.local /home/aegis/.local
COPY --chown=aegis:aegis src/ ./src/
COPY --chown=aegis:aegis scripts/ ./scripts/
# /var/log/aegis-mcp -> audit log (mount a writable volume)
# /var/lib/aegis-mcp -> dynamic client registration store (mount a writable, persistent volume)
RUN mkdir -p /var/log/aegis-mcp /var/lib/aegis-mcp /tmp/aegis-mcp \
&& chown -R aegis:aegis /var/log/aegis-mcp /var/lib/aegis-mcp /tmp/aegis-mcp
USER aegis
EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
CMD python -c "import httpx; httpx.get('http://127.0.0.1:8080/health', timeout=5)" || exit 1
CMD ["python", "-m", "aegis_gitea_mcp.server"]