Log files and the catalog
Logging in Puppet can be enabled on a client node (agent) with the --debug option to Puppet agent. This will output a lot of information. Each plugin file will be displayed as it is being read and executed. Once the catalog compiles, as each resource is applied to the machine, debugging information will be shown on the agent.
However, when you are debugging, your catalog may fail to compile. If this is the case, then you will need to examine the logs on the master. Where the logs are kept on the master depends on the way you have your master configured. The Puppet master process can be run either through a Ruby HTTP library named WEBrick, or via Passenger on a web server such as Apache or Nginx. Also, a third option now ...
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