Docker build is failing

[rohit]

I am not able to build docker container using the latest source code (commit - dbfc0bea227e45ba36756bc5e91aba36f83c2f09 )

Below is the error -

Collecting SQLAlchemy>=1.2.5
  Downloading SQLAlchemy-1.3.15.tar.gz (6.1 MB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
ERROR: Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/base_command.py", line 186, in _main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/commands/install.py", line 331, in run
    resolver.resolve(requirement_set)
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/legacy_resolve.py", line 177, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/legacy_resolve.py", line 333, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/legacy_resolve.py", line 282, in _get_abstract_dist_for
    abstract_dist = self.preparer.prepare_linked_requirement(req)
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/operations/prepare.py", line 516, in prepare_linked_requirement
    req, self.req_tracker, self.finder, self.build_isolation,
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/operations/prepare.py", line 95, in _get_prepared_distribution
    abstract_dist.prepare_distribution_metadata(finder, build_isolation)
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/distributions/sdist.py", line 38, in prepare_distribution_metadata
    self._setup_isolation(finder)
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/distributions/sdist.py", line 96, in _setup_isolation
    reqs = backend.get_requires_for_build_wheel()
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pep517/wrappers.py", line 152, in get_requires_for_build_wheel
    'config_settings': config_settings
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/pep517/wrappers.py", line 255, in _call_hook
    raise BackendUnavailable(data.get('traceback', ''))
BackendUnavailable
The command '/bin/sh -c curl -o "${TMP_CONSTRAINTS}" http://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt && sed -i "/^mistral.*/d" "${TMP_CONSTRAINTS}" && pip install -r "${MISTRAL_DIR}/requirements.txt"' returned a non-zero code: 2

Steps to reproduce -

- using docker
docker build -t mistral -f tools/docker/Dockerfile .

- using docker-compose
docker-compose -f tools/docker/docker-compose/infrastructure.yaml \
             -f tools/docker/docker-compose/mistral-single-node.yaml \
             -p mistral up -d

Apparently, this issue is getting fixed by adding '--no-use-pep517' flag in Dockerfile at 51 line (https://github.com/openstack/mistral/blob/master/tools/docker/Dockerfile#L51)

    pip install --no-use-pep517 -r "${MISTRAL_DIR}/requirements.txt"

Is this valid bug or am I doing something stupid ?

[rohit (rohitchormale)]

Additional Info -

Docker version 19.03.6 on Ubuntu 18.04.4 LTS