We used something very similar to this where I work (Crittercism). I designed most of it. I used five-part DNS CNAMEs exactly how they're specified in the arti

We used something very similar to this where I work (Crittercism). I designed most of it. I used five-part DNS CNAMEs exactly how they're specified in the article (a bit shocking, actually) except that mine switch the "group name" (prod, staging, CI, etc.) and the geography, with the rationale that "groups" can span several geographic areas (example: a multi-regional production environment), so they're logically the "containers" of geographic regions. Example: rtr01.us-west-2.prod.crittercism.com, NOT rtr01.prod.us-west-2.crittercism.com Great article.