Update python tooling image

[tolusha]

Signed-off-by: Anatoliy Bazko abazko@redhat.com

What does this PR do?

Updates python tooling image:
quay.io/eclipse/che-python-3.6:nightly -> centos/python-36-centos7:1

[l0rd]

Can't we use python:3.7.4-slim to be consistent with the LS sidecar?

[tolusha]

Command to install dependencies for the Django project failed due to permissions

ERROR: Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/usr/local/lib/python3.7/site-packages/django'
Consider using the `--user` option or check the permissions.

[tolusha]

I can use image with python 3.6 for a sidecar container instead.

[amisevsk]

I don't understand the purpose of this PR. Why are we moving away from using the arbitrary-user-id patched image?

For context, quay.io/eclipse/che-python-3.6:nightly is centos/python-36-centos7:1 with patches to support running on OpenShift.

[tolusha]

@amisevsk
That's a good question
@l0rd ?

[tolusha]

@amisevsk
I've reverted the changes.
This PR is just about fixing description.

[l0rd]

@tolusha I think the misunderstanding is that, to update the image, you should modify the base_images file https://github.com/eclipse/che-devfile-registry/blob/master/arbitrary-users-patch/base_images#L1, not the meta.yaml directly. That may solve your permission issues as well.

@amisevsk the goal here was to make the python base image consistent with python LS sidecar image eclipse-che/che-theia#427

[amisevsk]

So that I'm clear, updating base_images to point to python:3.7.4-slim does not work because the pip install command fails? Have we tried updating the devfile to use --user?

[tolusha]

@amisevsk
I think this PR implies creating a new che-python-3.7 repo, could you handle this pls?

[amisevsk]

Not approving quite yet since I'd like to test the new image before merging.

[amisevsk]

I've created the quay.io repo https://quay.io/repository/eclipse/che-python-3.7

[amisevsk]

Tested python-django devfile with changes and using patched image based off python:3.7.4-slim:

• I was able to connect a debugger to the running application in the main container
  • I believe the install dependencies task will have to be run every start, since pip --user install installs to ~/.local/, which is not persisted.
• I get error markers on imports ([pylint] Unable to import 'rest_framework') for non-project imports.

Before merging, please update python devfiles to use quay.io/eclipse/che-python-3.7:nightly