[CentOS7 + Python 2.7]: python::virtualenv fails

[chgarling]

The creation of new virtualenvs fails with:

Error: true && virtualenv --no-site-packages -p python /opt/privacyidea && /opt/privacyidea/bin/pip wheel --help > /dev/null 2>&1 && { /opt/privacyidea/bin/pip wheel --version > /dev/null 2>&1 || wheel_support_flag='--no-use-wheel'; } ; { /opt/privacyidea/bin/pip --log /opt/privacyidea/pip.log install $wheel_support_flag --upgrade pip distribute || /opt/privacyidea/bin/pip --log /opt/privacyidea/pip.log install --upgrade pip distribute ;} returned 1 instead of one of [0]
Error: /Stage[main]/Projects::Privacyidea::Install/Python::Virtualenv[/opt/privacyidea]/Exec[python_virtualenv_/opt/privacyidea]/returns: change from notrun to 0 failed: true && virtualenv --no-site-packages -p python /opt/privacyidea && /opt/privacyidea/bin/pip wheel --help > /dev/null 2>&1 && { /opt/privacyidea/bin/pip wheel --version > /dev/null 2>&1 || wheel_support_flag='--no-use-wheel'; } ; { /opt/privacyidea/bin/pip --log /opt/privacyidea/pip.log install $wheel_support_flag --upgrade pip distribute || /opt/privacyidea/bin/pip --log /opt/privacyidea/pip.log install --upgrade pip distribute ;} returned 1 instead of one of [0]

The puppet code looks like this:

class { 'python' :
version => 'system',
pip => 'present',
dev => 'present',
virtualenv => 'present',
gunicorn => 'absent',
use_epel => false,
}

python::virtualenv { '/opt/privacyidea':
ensure => present,
version => 'system',
owner => 'root',
group => 'root',
cwd => '/opt/privacyidea',
}

Maybe this is in relation with #309. Actually we can not use the python::virtualenv class because of this error. Let me know if you need further information.

[tprestegard]

Can we have an option to disable the hard-coded --no-binary :all: for pip installs (using python::virtualenv)? Trying to install something as basic as IPython for Python 2 fails because building one of its dependencies requires the 'flit' package, which doesn't offer Python 2 packages. I'm on Debian 9 with pip 18.0 and python 2.7.13. I've tried on Ubuntu 18.04 as well (same pip and Python versions) and gotten the same error.

Should be able to reproduce this by doing

virtualenv test_venv --python=/usr/bin/python2
source test_venv/bin/activate
pip install --no-binary :all: IPython

[tprestegard]

OK, I see that I can override this behavior by specifying extra_pip_args => '--no-binary :none:' in the python::virtualenv resource in my manifest file. I had to dig into the source code to figure this out and AFAIK it isn't documented anywhere, so it would be good to fix that, at least.

[bastelfreak]

@tprestegard can you create a PR that updates the README.md?