I've made the following Dockerfile
to build a python application:
FROM python:3.7
WORKDIR /app
# Install python dependencies
ADD requirements.txt /app/
RUN pip3 install --upgrade pip
RUN pip3 install -r requirements.txt
# Copy sources
ADD . /app
# Run detection
CMD ["detect.py" ]
ENTRYPOINT ["python3"]
The requirements.txt
file contains only a few dependencies, including opencv
:
opencv-python
opencv-python-headless
filterpy==1.1.0
lap==0.4.0
paho-mqtt==1.5.1
numpy
Pillow
Building the Docker image works perfectly. When I try to run the image, I got the following error:
ImportError: libGL.so.1: cannot open shared object file: No such file or directory
Traceback (most recent call last):
File "detect.py", line 6, in <module>
import cv2
File "/usr/local/lib/python3.7/site-packages/cv2/__init__.py", line 5, in <module>
from .cv2 import *
ImportError: libGL.so.1: cannot open shared object file: No such file or directory
Seems like the CV2 dependency is not satisfied.
Is there something I missed building the Dockerfile
?
I have tried to replace opencv-python-headless
by python3-opencv
but there is no matching distribution found.
CodePudding user response:
libGL.so.1
could be found in libgl1
, so you could add next to Dockerfile
:
RUN apt update; apt install -y libgl1
Typically, docker images may remove many libraries to make the size small, these dependencies most probably could be already installed in your host system.
So, for me, I usually use dpkg -S
in host system to find which package I needed, then install them in container:
shubuntu1@shubuntu1:~$ dpkg -S libGL.so.1
libgl1:amd64: /usr/lib/x86_64-linux-gnu/libGL.so.1
libgl1:amd64: /usr/lib/x86_64-linux-gnu/libGL.so.1.0.0