Communication issues
Before you can begin debugging complex catalog problems, you need your nodes to communicate with each other. Communication problems between nodes and the master can either be network-related or certificate-related (SSL).
Network-related problems
When the Puppet agent is started on a node, one of the first things that the agent does is look up the value for the server option. You can either specify this with --server on the command line, or with server=[hostname] in the puppet.conf configuration file. By default, Puppet will look for a server named puppet. If it cannot find one named puppet, it will then try puppet.[your domain].
Tip
What Puppet believes to be your domain may be obtained by running facter domain.
When you are debugging ...
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