[Gnocchi-api] Gnocchi-api can not be found

To whom it may concern, I got the error message when I restart gnocchi-api as the official installation guide. Here is the error message I got root@c3macserver2:~# service gnocchi-api start Failed to start gnocchi-api.service: Unit gnocchi-api.service not found. root@c3macserver2:~# whereis gnocchi-api gnocchi-api: /usr/bin/gnocchi-api gnocchi-api is already the newest version (4.3.2-0ubuntu2~cloud0). Someone said the new version doesn't include the gnocchi-api, so I am trying to install the previous version. https://stackoverflow.com/questions/47520779/service-gnocchi-api-not-found Need the help to install the previous version of gnocchi-api. My openstack version : stein Ubuntu 18.0.4 Thanks. Kind regards, Walsh