Comment 3 for bug 1670223

I think here charm-helpers here is not the one at fault, because /var/lib/nagios will be created once nagios-nrpe-server is installed and here glance is calling update_nrpe_config() withouth checking if it's related to nrpe or if nagios-nrpe-server is installed.

glance should be verify it before it attempts to write the configuration.