To enable the Salt Mine the mine_functions option needs to be applied to a minion. This option can be applied via the minion's configuration file, or the minion's Pillar
So the 'must' part should be a bit better defined...
and maybe add a pillar.example file to show the user how he/she could set it up.
see http://docs.saltstack.com/en/latest/topics/mine/#mine-functions
So the 'must' part should be a bit better defined... and maybe add a pillar.example file to show the user how he/she could set it up.