title: Pytest and virtualenv || Failed to configure container: [Errno 1]
body: <p>I am currently working on a python program for finding flaky tests by running them multiple times. To achieve this goal, I'm executing the tests in a virtualenv in random order using pytest. </p>
  
  <p>When I execute the program on a remote machine via slurm job, I get following error codes:</p>
  
  <pre><code>2019-11-26 18:18:18,642 - CRITICAL - Failed to configure container: [Errno 1] Creating overlay mount for '/' failed: Operation not permitted. Please use other directory modes, for example '--read-only-dir /'.
  
  2019-11-26 18:18:18,777 - CRITICAL - Cannot execute 'pytest': execution in container failed. 
  </code></pre>
  
  <p>This doesn't happen on my local machine, only on the task startet via the slurm job.</p>
  
  <p>This is my first time working with python at this complexity, so I'm not really sure where to start solving the problem.</p>
  
  <p>Thanks a lot in advance!</p>