ConSol/docker-headless-vnc-container

chromium crashes with VNC_RESOLUTION=1920x1080 (too small space on `/dev/shm`)

raghavkarol opened this issue · 5 comments

toschneck commented

Thx @raghavkarol for the hint. I can't reproduce the error in the current version. It's still a problem? I tried:

docker run -it -p 6901:6901 -e VNC_RESOLUTION=1920x1080 consol/centos-xfce-vnc:1.2.2 chromium-browser https://labs.consol.de

and all works fine. If so, can you please provide the commands to reproduce the error?

raghavkarol commented

Sure, e.g., http://map.norsecorp.com and some other heavy URLs crash chromium and chrome.

The command below consistently crashes chrome:
docker run -it -p 6901:6901 -e VNC_RESOLUTION=1920x1080 consol/centos-xfce-vnc:1.2.2 chromium-browser http://map.norsecorp.com/

while this works:
docker run -it -v /dev/shm:/dev/shm -p 6901:6901 -e VNC_RESOLUTION=1920x1080 consol/centos-xfce-vnc:1.2.2 chromium-browser http://map.norsecorp.com/

toschneck commented

@raghavkarol Ok I took a look at it and the error is reproducible. Due to the fact that our images are not designed to run as root see #3 we can't adjust our startup script to your mentioned solution.
In my opinion the best way for this is to set the flag docker run -it --shm-size=256m like described at: https://stackoverflow.com/questions/30210362/how-to-increase-the-size-of-the-dev-shm-in-docker-container.
To prevent that others will fall into this issue, I will add a hint at the README.md.
This should work also for you, or?

docker run --shm-size=256m -it -p 6901:6901 -e VNC_RESOLUTION=1920x1080 consol/centos-xfce-vnc:1.2.2 chromium-browser http://map.norsecorp.com/
slpcat commented

patch for kubernetes to fix shm size

    livenessProbe:
      tcpSocket:
        port: 5901
      initialDelaySeconds: 1
      timeoutSeconds: 1
    ### checks if http-vnc connection is working
    readinessProbe:
      httpGet:
        path: /
        port: 6901
        scheme: HTTP
      initialDelaySeconds: 1
      timeoutSeconds: 1
    volumeMounts:
      - mountPath: /dev/shm
        name: shm
  volumes:
  - name: shm
    emptyDir:
      sizeLimit: 1024Mi
      medium: Memory
  • 👍1
conmarti commented

I've found another solution for this issue. Both Chromium and Chrome support --disable-dev-shm-usage flag. So there's no need to raise the shm-size.

  • 👍2