Nagios and Icinga has support for Gnocchi through a Gnocchi-nagios service. It can be installed with pip:
pip install gnocchi-nagios
Source and Documentation are also available.
Gnocchi-nagios collects perfdata files generated by Nagios or Icinga; transforms them into Gnocchi resources, metrics and measures format; and publishes them to the Gnocchi REST API.