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docker-dosbox-novnc/Dockerfile
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jensandClaude Sonnet 5 3332553cb5 Give each running game its own screen, capped at 10 concurrent
Previously every game shared one always-on Xvnc/fluxbox/websockify
desktop, so starting two games at once meant they fought over focus on
the same screen and the same ALSA device. Now:

- server.sh no longer starts a shared desktop at all - it just runs
  setup_server.py. There's no default display anymore.
- start_game() allocates a free display from GAME_DISPLAY_NUMS
  (:90-:99, one per MAX_CONCURRENT_GAMES=10 slot), spins up a fresh
  Xvnc+fluxbox+websockify for it, and launches the game with DISPLAY set
  to that display. All four processes are tracked together per game.
- stop_game() tears down all four; is_running() does the same lazily if
  the game exited on its own (crash/quit), so a slot doesn't stay stuck
  just because nobody clicked Stop.
- Starting past the 10-slot cap is refused with an error shown on that
  game's row instead of silently failing.
- Each running game's row gets its own "Open Screen" link (client-side
  JS, since the port is only known once the game is actually started)
  instead of one global noVNC link.
- run.sh publishes the whole 8090-8099 noVNC port range up front, since
  Docker can't add port mappings to an already-running container.

Verified end-to-end: two different games running concurrently get fully
independent Xvnc/fluxbox/websockify/game process sets and noVNC
endpoints; stopping one leaves the other untouched; the capacity guard
correctly refuses a start at the limit.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NiNnj78HGx1KWyCCo39HSz
2026-07-28 15:25:00 +02:00

34 lines
1.1 KiB
Docker

# syntax=docker/dockerfile:1
FROM ich777/novnc-baseimage
ENV DISPLAY_NUM=99
ENV GAMES_HOME=/opt/games
ENV SCRIPTS_HOME=/opt/scripts
ENV PATH=${PATH}:${SCRIPTS_HOME}
# unzip/smbclient/python3 are needed at runtime: the games are no longer baked into the
# image, setup_server.py serves an HTML install UI (backed by smbget+unzip) that the user
# drives on ${SETUP_PORT} instead of anything being auto-downloaded at container start.
RUN apt-get update && \
apt-get -y install --no-install-recommends dosbox scummvm alsa-utils unzip smbclient python3 && \
rm -rf /var/lib/apt/lists/*
RUN openssl req -x509 -nodes -newkey rsa:2048 -keyout /tmp/novnc.key -out /tmp/novnc.pem -days 3650 -subj "/C=US/ST=NY/L=NY/O=NY/OU=NY/CN=NY emailAddress=email@example.com"
RUN touch /root/.Xauthority
RUN mkdir -p ${GAMES_HOME}
VOLUME ${GAMES_HOME}
ADD scripts ${SCRIPTS_HOME}
WORKDIR /
EXPOSE 60${DISPLAY_NUM}
EXPOSE 70${DISPLAY_NUM}
EXPOSE 8090-8099
EXPOSE 5900
ENTRYPOINT ["/opt/scripts/server_start.sh", "/opt/scripts/server.sh"]
# see also
# https://github.com/ich777/docker-krusader