Environment
SUSE Linux Enterprise Server 12 Service Pack 4 (SLES 12 SP4)
iManager 3.1.1
Situation
iManager 3.1.1 was installed while the OS was still SLES 11 SP4 (SysV).
OS was then upgraded to SLES12 SP4 (systemd) and tomcat/iManager no longer auto-started at boot time.
Resolution
Execute the following commands to create entries into systemd and cause Tomcat8 to automatically start after a server reboot.
cp -f /etc/opt/novell/tomcat8/init.d/tomcat8-service.service /usr/lib/systemd/system/novell-tomcat8-service.service
chown -R novlwww:novlwww /usr/lib/systemd/system/novell-tomcat8-service.service
/usr/bin/systemctl enable /usr/lib/systemd/system/novell-tomcat8-service.service
systemctl start novell-tomcat8-service.service
Cause
When iManager 3.1 was installed the OS was SLES11 (SysV) and it used /usr/sbin/rcnovell-tomcat8 to start/stop iManager.
Upgrading to SLES12 removed that symbolic link but did not enable the /etc/opt/novell/tomcat8/init.d/tomcat8-service.service in systemd