This adds defined anchor points for external modules to hook into the
software install, config and service dependency chain. This allows
external modules to manage software installation (virtualenv,
containers, etc) and service management (pacemaker) without needing rely
on resources that may change or be renamed.
Change-Id: I00cf4846bb933291469be94c9debed425eddf798
This commit adds support for fedora.
It introduces a params namespace class
to hold data differences between ubuntu and fedora.
It also moves the xfs packages into their own class (swift::xfs)
