Sharing the Xserver with docker container

[Tong Sun]

On Sun, Jan 24, 2021 at 11:06 PM Tong Sun <suntong001 at gmail.com> wrote:
>
> On Sun, Jan 24, 2021 at 10:45 PM Ryan Schmidt <ryandesign at macports.org> wrote:
> >
> >
> >
> > On Jan 24, 2021, at 21:42, Tong Sun wrote:
> >
> > > On Sun, Jan 24, 2021 at 10:31 PM Ryan Schmidt wrote:
> > >
> > >> I found this article about how to do this. Maybe it will help?
> > >>
> > >> https://medium.com/@mreichelt/how-to-show-x11-windows-within-docker-on-mac-50759f4b65cb
> > >>
> > >> Where it says "install XQuartz", don't, since you already have the MacPorts X11.app which is equivalent to but newer than XQuartz.
> > >>
> > >> It sounds like the key may be to set "Allow connections from network clients" in X11.app's Preferences window, close and reopen X11.app, and run "xhost + 127.0.0.1" and "export DISPLAY=host.docker.internal:0" in the Docker image.
> > >
> > > Hmm... I've looked everywhere but cannot find this "Allow connections
> > > from network clients" in X11.app's Preferences window. Where can I
> > > find it?
> > >
> > > Without such step, I'm getting
> > >
> > > $ xhost + 127.0.0.1
> > > xhost:  unable to open display "127.0.0.1:0"
> >
> > Open X11.app. Choose Preferences from the X11 menu. Select the Security tab.
>
> Ah, got it working. Thanks a lot!!
>
> Just that there is 10 extra second delay, which I have no idea where
> it is coming from --
>
> $ time xclip -o -selection clipboard
> Last login: Sun Jan 24 17:05:13 on console
>
> real 0m10.057s
> user 0m0.002s
> sys 0m0.004s
>
> Subsequent requests are served very fast:
>
> $ time xclip -o -selection clipboard
> Last login: Sun Jan 24 17:05:13 on console
>
> real 0m0.014s
> user 0m0.003s
> sys 0m0.002s
>
> until the clipboard content is changed, when there will be another
> extra 10s delay.
>
> Neither  macport's xorg-server nor docker should cause such delay. Weird.

Indeed! try to run the exact same command outside macport's xterm and
docker (in mac native terminal), and got the exact same behavior.