Yes that’s the question - your startup seems reasonable.
You have checked SELinux to eliminate that as a possible problem source?
You will find other install notes for CentOS for comparison *SOLVED* Install.py now FAILS on Unbuntu 14.04, Debian 8, Centos 7. What happened? (also same on Ubuntu 16.04) *SOLVED*
Debian is the most common for installs.
EDIT: Note this for general what to try ideas Blank Login Screen After Upgrade To V8