Python Tkinter in Docker .TclError: couldn't connect to display
Solution 1
As described here, you would need an X11 graphic layer.
But since you are already on an '(X)Ubuntu, setting the DISPLAY should be enough:
export DISPLAY=127.0.0.1:0.0
docker run -it -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix yourImage
Check also XAuthority.
Solution 2
You'll have to set DISPLAY in the container. You can add it as an argument to the docker run command like this:
docker run -ti -e DISPLAY=$DISPLAY blah-image blah-command
DISPLAY should be set in the Xubuntu shell you are running the command from.
Solution 3
Type xhost +
in your terminal. Then
docker run --rm \
--network=host --privileged \
-v /dev:/dev \
-e DISPLAY=$DISPLAY \
-v /tmp/.X11-unix:/tmp/.X11-unix \
-v $HOME/.Xauthority:/root/.Xauthority \
-it yourimage
worked for me. xhost +
disables access control. After which a client can connect from any host.
Admin
Updated on June 14, 2022Comments
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Admin almost 2 years
I am new to python and am trying to build a small app. It needs to be a GUI app and I was wanting to containerise it with docker. I am getting the following error and can not find a solution
No protocol specified No protocol specified Traceback (most recent call last): File "tkinker.py", line 7, in <module> tinker = Tk() File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1818, in __init__ self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use) _tkinter.TclError: couldn't connect to display ":0.0"
It starts locally but wont start in docker. My OS is Xubuntu.
I have created a sample app (below), see run-test.sh https://github.com/jeremysells/test/tree/master/docker-tkinter
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Admin over 7 yearsSaidly same issue # docker run -ti -e DISPLAY=$DISPLAY tkinter-test:latest Traceback (most recent call last): File "tkinker.py", line 7, in <module> tinker = Tk() File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1818, in init self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use) _tkinter.TclError: couldn't connect to display ":0.0"
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VonC over 7 yearsSee also github.com/docker/docker/issues/8710#issuecomment-71113263 to expose local xquartz socket on a TCP port.
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SidJ over 7 yearsIs display set in the shell where you start the command? Are you able to run GUIs from outside of docker?
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Admin over 7 yearsYes the display is enabled. When I run
#echo $DISPLAY
it returns ":0.0". I wonder if it has something to do with xauth (stackoverflow.com/questions/16296753/… and wiki.ros.org/docker/Tutorials/GUI). I don't have any free time at the moment, so will have to get back to testing this when I do -
Dan Anderson over 4 yearsUse the IP address of your Linux/UNIX system (not the Docker container). For example,
-e DISPLAY=10.0.0.1:0.0
(replace10.0.0.1
with the IP address of your Linux/UNIX system). -
David Maze over 4 years"Connect" here implies being able to run things like screen captures and keystroke loggers: you really don't want to allow this ability "from any host".
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RayLuo over 3 yearsSo, what is the better alternative, @DavidMaze ?