using DANTE python27 rpm for python base environment (includes python virtualenv), residing in /opt/rh/pythin27, being possible to install in parallel to OS python2.6 without conflicts
using python27 virtualenv to create FoD private python package installation directory for all of FoD's python dependencies to install via pip, so no conflicts (e.g. overwrites) with any other python packages installed via any rpm
especially gunicorn and celeryd binaries (python wrapper scripts) are part of installed python dependencies in virtualenv dierctory
so both init scripts for gunicorn and celeryd have to be adapted to load appropriate environement of python27 environment of python27(/opt/rh/python27/enable) and virtualenv directory (currently /opt/fod/python-virtual/bin/activate) have to be sourced (in that order) and to use the new guncorn/celeryd binary to be started