Forum: Cfengine Help
Subject: Re: "irreconcilable constraints" error when trying to set a role class 
based on a hostname. (Was Re: Machine types)
Author: neilhwatson
Link to topic: https://cfengine.com/forum/read.php?3,18468,18475#msg-18475

I'm going to go off on a rant here.  DNS names should not be used as an 
inventory system.  DNS is used to make host names easier to remember than IP 
addresses.  If a host name is harder to remember than an IP address then the 
naming convention has failed.  
http://watson-wilson.ca/blog/name-conv.html

There is no substitute for a proper inventory system.

When you make class names you need a-zA-Z0-9_ only.  The underscore is the only 
allowable punctuation.  When in doubt classify or canonify.

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