Vagrantfile which loads Chef attributes from a JSON file

Vagrantfile

# If you want to provide custom Chef attributes that should not end up in Git
# (e.g. secret tokens), copy `chef.json.example` to `chef.json` and edit the
# latter accordingly (in that case, the example file will be ignored).

# ...
  # Configure Chef Solo provisioner
  config.vm.provision :chef_solo do |chef|
    # Tell Vagrant where the cookbooks are located
    chef.cookbooks_path = "vendor/cookbooks"

    # Load node attributes and run list from a JSON file
    json_file = %w(chef.json chef.json.example).select { |f| File.exists? f }.first
    chef.json = JSON.parse(IO.read(json_file))

    # Set Chef log level
    chef.log_level = ENV.fetch("CHEF_LOG", "info").downcase.to_sym
  end
# ...