Unable to deploy due to missing libGL

Describe the bug Deploy step errors out due to missing libGL.so.1 when importing the library cv2. I would expect that this is part of the image itself- does it mean I need to use a custom image to install libGL?

To reproduce Add an import cv2 statement to the inference.py script bundled with your model. requirements.txt is located in the same directory as inference.py with the following contents:

opencv-contrib-python>=4.3.0.36
numpy>=1.19.0

Expected behavior This inference script is supposed to load an image from a URL given in the payload, and format the contents for inference.

Screenshots or logs Relevant CloudWatch logs:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/workers/ggevent.py", line 203, in init_process
    super(GeventWorker, self).init_process()
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/workers/base.py", line 129, in init_process
    self.load_wsgi()
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/workers/base.py", line 138, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python3.6/dist-packages/gunicorn/util.py", line 350, in import_app
    __import__(module)
  File "/sagemaker/python_service.py", line 440, in <module>
    resources = ServiceResources()
  File "/sagemaker/python_service.py", line 426, in __init__
    self._python_service_resource = PythonServiceResource()
  File "/sagemaker/python_service.py", line 74, in __init__
    self._handler, self._input_handler, self._output_handler = self._import_handlers()
  File "/sagemaker/python_service.py", line 303, in _import_handlers
    spec.loader.exec_module(inference)
  File "/opt/ml/model/code/inference.py", line 6, in <module>
    import cv2
  File "/usr/local/lib/python3.6/dist-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

System information A description of your system. Please provide:

Toolkit version: Sagemaker Python SDK / Tensorflow Serving Container
Framework version: TF 1.15
Python version: 3.6
CPU or GPU: CPU
Custom Docker image (Y/N): N

aws / sagemaker-tensorflow-serving-container

Unable to deploy due to missing libGL #159