The SAP Start Service (sapstartsrv) has been configured as boot service according to SAP Note 823941 - SAP start service on Unix platforms. But sapservice is not started automatically after OS reboot.

Environment

SAP on SUSE Linux

Cause

The system does not have the "sap_server" pattern installed, nor does it have the "insserv-compat" package installed individually.

The pattern is recommended for all SAP systems (and it contains the insserv-compat package).

These are needed to enable the sapinit script.

Resolution

Install either the pattern, or at least the package individually.

After this, please check the status of sapinit with:

chkconfig --list sapinit

If it is reported as off as below, 
sapinit  0:off  1:off  2:off  3:off  4:off  5:off   6:off

enable it with:

chkconfig sapinit on

To switch on for 3 and 5 on server, chkconfig sapinit on --level 53
See Also

823941 - SAP start service on Unix platforms
2578899-SUSE Linux Enterprise Server 15: Installation Note

https://me.sap.com/notes/0003128058