Description of problem:

When running packstack installation in a base Centos7 system, following error appears:

[vadmin@openstackqueen yum.repos.d]$ sudo packstack --allinone
ERROR:root:Failed to load plugin from file ssl_001.py
ERROR:root:Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 923, in loadPlugins
    moduleobj = __import__(moduleToLoad)
  File "/usr/lib/python2.7/site-packages/packstack/plugins/ssl_001.py", line 20, in <module>
    from OpenSSL import crypto
  File "/usr/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/usr/lib/python2.7/site-packages/OpenSSL/crypto.py", line 13, in <module>
    from cryptography.hazmat.primitives.asymmetric import dsa, rsa
  File "/usr/lib64/python2.7/site-packages/cryptography/hazmat/primitives/asymmetric/rsa.py", line 14, in <module>
    from cryptography.hazmat.backends.interfaces import RSABackend
  File "/usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 7, in <module>
    import pkg_resources
ImportError: No module named pkg_resources

ERROR:root:Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 988, in main
    loadPlugins()
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 931, in loadPlugins
    raise Exception("Failed to load plugin from file %s" % item)
Exception: Failed to load plugin from file ssl_001.py


ERROR : Failed to load plugin from file ssl_001.py



Version-Release number of selected component (if applicable):


How reproducible:

allways

Steps to Reproduce:
1. Enable RDO repositories in a RHEL 7.4 system.

cd /etc/yum.repos.d/
wget http://trunk.rdoproject.org/centos7/delorean-deps.repo
wget http://trunk.rdoproject.org/centos7/current-passed-ci/delorean-repo

2. install packstack

yum install -y openstack-packstack

3. run packstack allinone option

packstack --allinone

Actual results:

Installation fails with error:

  File "/usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 7, in <module>
    import pkg_resources
ImportError: No module named pkg_resources



Expected results:

packstack command should run fine


Additional info:

File /usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py
is importing pkg_resource provided by python-setuptools but it's not included as dependency. I think that's a missing Requires.