ServerName is empty in 10-keystone_wsgi_admin.conf

[Deepak Jon]

ServerName is empty in 10-keystone_wsgi_admin.conf(Newton release) while running packstack --allinone

Error:
ERROR : Error appeared during Puppet run: 10.10.0.87_controller.pp
Error: Could not start Service[httpd]: Execution of '/usr/bin/systemctl start httpd' returned 1: Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.

~]# httpd -t
AH00526: Syntax error on line 7 of /etc/httpd/conf.d/10-keystone_wsgi_admin.conf:
ServerName takes one argument, The hostname and port of the server

Please let me know if more details needed!

[Deepak Jon (deepak-kumar-9)]

Added logs

[Juan Antonio Osorio Robles (juan-osorio-robles)]

We saw this issue in TripleO in RHEL. Is it so that the ServerName parameter for that template in httpd is being filled with the fact $::hostname ? If that's the case, you need to have a domain set for $::hostname else the result will be empty, and you will see that failure. For some reason CentOS doesn't have this problem.