One major undocumented problem that I did not see in the patch notes involves openldap. Specifically there is some error in generating a PID file in the system-d service call. I solved the problem by removing/commenting out the run PID line in /usr/lib/systemd/system/slapd.service
There are a few "known issues" with OpenLDAP [0] in the RHEL 7.5 release notes but I don't see that one mentioned. ICYMI, the openldap-servers package is "deprecated and will not be included in a future major release of Red Hat Enterprise Linux". For RHEL, that means it will remain in the 7.x versions but will not be included in 8.x when it is released (which should be Real Soon Now(tm)). For CentOS, that also (likel…
openldap upstream suggest using these on CentOS / RHEL over the redhat packages, if operating the server components.