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Headless rendering error when executing in Docker

See original GitHub issue

I’m having troubles executing a script in Docker

The script is:

import os
os.environ['DISABLE_MUJOCO_RENDERING'] = '1'

from dm_control import suite

env = suite.load(domain_name="humanoid", task_name="stand")
action_spec = env.action_spec()


print(action_spec)

What doesn’t make sense to me is that when I ssh the machine and execute this script it works without a problem but after building a docker image and running it I get the following:

Traceback (most recent call last):
  File "test_dm_control.py", line 4, in <module>
    from dm_control import suite
  File "/usr/local/lib/python3.6/dist-packages/dm_control/suite/__init__.py", line 28, in <module>
    from dm_control.suite import acrobot
  File "/usr/local/lib/python3.6/dist-packages/dm_control/suite/acrobot.py", line 24, in <module>
    from dm_control import mujoco
  File "/usr/local/lib/python3.6/dist-packages/dm_control/mujoco/__init__.py", line 18, in <module>
    from dm_control.mujoco.engine import action_spec
  File "/usr/local/lib/python3.6/dist-packages/dm_control/mujoco/engine.py", line 44, in <module>
    from dm_control import _render
  File "/usr/local/lib/python3.6/dist-packages/dm_control/_render/__init__.py", line 75, in <module>
    Renderer = import_func()
  File "/usr/local/lib/python3.6/dist-packages/dm_control/_render/__init__.py", line 36, in _import_egl
    from dm_control._render.pyopengl.egl_renderer import EGLContext
  File "/usr/local/lib/python3.6/dist-packages/dm_control/_render/pyopengl/egl_renderer.py", line 43, in <module>
    from dm_control._render.pyopengl import egl_ext as EGL
  File "/usr/local/lib/python3.6/dist-packages/dm_control/_render/pyopengl/egl_ext.py", line 33, in <module>
    from OpenGL import EGL
  File "/usr/local/lib/python3.6/dist-packages/OpenGL/EGL/__init__.py", line 2, in <module>
    from OpenGL.raw.EGL._types import *
  File "/usr/local/lib/python3.6/dist-packages/OpenGL/raw/EGL/_types.py", line 87, in <module>
    raw_eglQueryString = _p.PLATFORM.EGL.eglQueryString
AttributeError: 'NoneType' object has no attribute 'eglQueryString'

The docker file is:

# Use the official image as a parent image
FROM tensorflow/tensorflow:2.0.0-gpu-py3

ENV MJLIB_PATH=/tf/mujoco200_linux/bin/libmujoco200.so
ENV MJKEY_PATH=/tf/mujoco200_linux/bin/mjkey.txt
ENV LD_LIBRARY_PATH=/tf/mujoco200_linux/bin/
ENV PYGLFW_LIBRARY=/tf/mujoco200_linux/bin/libglfw.so.3

# i need this for ffmpeg
ENV PATH="/tf/.local/bin/:${PATH}"

# Run the command inside your image filesystem
RUN pip install --upgrade pip && \
        pip install gym && \
    pip install gym[atari] && \
        pip install dm_control && \
        pip install tqdm && \
        pip install np_utils && \
        pip install opencv-python

The OS both on the server and in Docker is Ubuntu. Thanks a lot for any help you can provide!