title: How can I solve getting Unauthorized Access 401 error when pulling aws deep learning container with docker?
body: <p>I tried building a detectron2 image with docker, in order to use with AWS SageMaker.  The dockerfile looks like this:</p>
  <pre><code>ARG REGION=&quot;eu-central-1&quot;
  
  FROM 763104351884.dkr.ecr.$REGION.amazonaws.com/pytorch-training:1.6.0-gpu-py36-cu101-ubuntu16.04
  
  RUN pip install --upgrade torch==1.6.0+cu101 torchvision==0.7.0+cu101 -f https://download.pytorch.org/whl/torch_stable.html
  
  ############# Detectron2 section ##############
  RUN pip install \
      --no-cache-dir pycocotools~=2.0.0 \
      --no-cache-dir https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/torch1.6/detectron2-0.4%2Bcu101-cp36-cp36m-linux_x86_64.whl
  
     
  ENV FORCE_CUDA=&quot;1&quot;
  # Build D2 only for Volta architecture - V100 chips (ml.p3 AWS instances)
  # ENV TORCH_CUDA_ARCH_LIST=&quot;Volta&quot;
  
  # Set a fixed model cache directory. Detectron2 requirement
  ENV FVCORE_CACHE=&quot;/tmp&quot;
  
  ############# SageMaker section ##############
  
  COPY container_training/sku-110k /opt/ml/code
  WORKDIR /opt/ml/code
  
  ENV SAGEMAKER_SUBMIT_DIRECTORY /opt/ml/code
  ENV SAGEMAKER_PROGRAM training.py
  
  WORKDIR /
  
  ENTRYPOINT [&quot;bash&quot;, &quot;-m&quot;, &quot;start_with_right_hostname.sh&quot;]
  </code></pre>
  <p>The problem is that when I run the docker build command, it fails at pulling the image from the AWS ECR repository. It throws the error</p>
  <blockquote>
  <p>ERROR [internal] load metadata for
  763104351884.dkr.ecr.eu-central-1.amazonaws.com/pytorch-training:1.6.0-gpu  0.4s ------                                                                                                                   &gt; [internal] load metadata for 763104351884.dkr.ecr.eu-central-1.amazonaws.com/pytorch-training:1.6.0-gpu-py36-cu101-ubuntu16.04:
  ------                                                                                                                  failed to solve with frontend dockerfile.v0: failed to create LLB
  definition: unexpected status code [manifests
  1.6.0-gpu-py36-cu101-ubuntu16.04]: 401 Unauthorized</p>
  </blockquote>
  <p>I have to mention that I successfully login before trying to build and I have full ECR permissions on my user.</p>