So, I've been working with Chef quite a bit, lately. Every once in a while, I'll bootstrap a new node and it fails with this:
Net::HTTPServerException: 412 "Precondition Failed"
Every single time this has happened to me, I've had stop and scratch my head. Why can't I remember what causes this!? Well, in my case it's usually a misspelled cookbook or recipe name. For example, I might have a
role that looks something like this:
name "sample-server" description "sample apache server" run_list "role[apache::default]"
Can you spot the problem? The opscode cookbook for apache is named apache2!
name "sample-server" description "sample apache server" run_list "role[apache2::default]"
So, one complaint that I have about chef is that
Net::HTTPServerException: 412 "Precondition Failed" should probably say something like
Net::HTTPServerException: 412 "Couldn't find cookbook 'apache'". Oh well... C'est la vie
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