Hi all,

I have no experience writing ansible roles. At the moment I'm trying to 
write a few ansible roles, but I'm not sure how to separate 
responsibilities.

I have two roles.
- prometheus - installs and configures prometheus. 
- mongodb - Installs and configures mongodb database.

Prometheus needs to be configured in order to scrap metrics about mongoDB. 
Basically, it's necessary to put a file on a directory where the prometheus 
server is installed, containing information about mongodb location, etc... 
the question is: Should I configure this on the prometheus role? It seems 
to me that I'm polluting the prometheus role with things that belong 
elsewhere. This way, I'm also coupling the prometheus role with a specific 
use case. It's recommended to create a separate role to configure mongodb 
location on prometheus?

What's the best practice? 

Thanks,
Rui





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