Couchbase4 install on CentOS7 can not been start by systemctl?

Hi engineers ,i installed couchbase on centos7 then can not start up by ‘systemctl start couchbase-server’ or ‘service couchbase-server start’ that print
’Unit couchbase-server.service failed to load: No such file or directory’
,i have to use '/etc/init.d/couchbase-server start ', only i meet this problem?

This issue has been already discussed here:


thank you