This is a puppet module for nfs client/server based on the common credativ puppet modules layout (github.com/credativ/puppet-module-template)
Most common use case for the module is to just include it and configure it in the hiera backend.
So including it via the following line of code or in a ENC declaration (apart from proper configuration in hiera or top-scope variables) is usually enough:
class { 'nfs': }
The module is able to create configuration itself, it just needs appropriate parameters. See the documentation for the main manifest for an explanation of the parameters.
Apart from this specifying a config_source works as well.
class { 'nfs':
config_source => 'puppet:///files/foo/nfs.conf'
}