Day 29 in the #vDM30in30 Image from https://flic.kr/p/sqiJKP
Let’s talk about the lifecycle of a Puppet run.
The Puppet agent process collects information about the host it is running on including facts, which it passes to the server. The parser uses that system information and Puppet modules on local disk to compile a configuration for that particular host and returns it to the agent. The agent applies that configuration locally, thus affecting the local state of the host, and files the resulting report with the server, including the facts from the system Essentially, Puppet runs in an atomic fashion: Information it has is locked at the start of the run, and is not changed.
