Puppetboard scenario does not work on CentOS 7

[mattock]

As we have no immediate need for CentOS 7 Puppetmaster with Puppetboard I will just note down the issues encountered with it.

The httpd service does not start because /etc/httpd/conf.modules.d/00-mpm.conf tries to load a conflicting MPM module:

LoadModule mpm_prefork_module modules/mod_mpm_prefork.so

This is probably the reason why we originally set the MPM to "prefork" across all platforms. But now, as we don't purge_configs with puppetlabs-apache this causes a issue. Simply commenting out or removing that line makes httpd start correctly.

Another issue is that the Python module attempts to install python3-virtualenv package which is not present on CentOS 7. This would have to be fixed.

[mattock]

Probably the easiest way to fix the first problem would be to select the MPM module based on $::osfamily.