在 docker 容器上运行 Tkinter

Question

I am new to using docker and I am currently learning how to build a docker image and run it. I successfully managed to build my docker image, however, I am getting this error when running the image:

Traceback (most recent call last):
  File "gui.py", line 1, in <module>
    import tkinter as tk
  File "/usr/local/lib/python3.7/tkinter/__init__.py", line 36, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: Error loading shared library libtk8.6.so: No such file or directory (needed by /usr/local/lib/python3.7/lib-dynload/_tkinter.cpython-37m-x86_64-linux-gnu.so)

Dockerfile:

FROM python:alpine3.8 
COPY . /app
WORKDIR /app
RUN pip3 install -r requirements.txt 
ENTRYPOINT [ "python3" ] 
CMD [ "gui.py" ] 

Requirements.txt:

gspread
oauth2client
fpdf
networkx

I am trying to run a Tkinter app in docker. How can I resolve this? Any help would be really appreciated. Thanks!

Answer 1

Looks like package tk is missing, hope this solves your problem. Install tk package for alpine from your Dockerfile. Modify your dockerfile to install it like below,

FROM python:alpine3.8 
COPY . /app
WORKDIR /app
RUN apk update && apk add tk
RUN pip3 install -r requirements.txt 
ENTRYPOINT [ "python3" ] 
CMD [ "gui.py" ] 

If still there are any missing packages just add them using RUN apk add <package1> <package2>