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puppet

What is @@ called in puppet, and what does it do?

I'm learning puppet, and have come across a part of haproxy configuration which looks like the following

@@haproxy::balancermember { $::fqdn:
    listening_service => 'puppet00',
    server_names      => $::hostname,
    ipaddresses       => $::ipaddress,
    ports             => '8140',
    options           => 'check',
 }

I'm trying to work out what the @@ is called and what it does in this config

Solution

  • The manifest is declaring an exported resource for use by another node.

    This allows you to create dynamic configurations that adapt to the shifting set of nodes in a given setup.