yum install postgresql, python dependencies, and odoo on CentOS 7.

ODOO is installed:

[root@bogon ~]# yum install odoo
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* epel: mirror.premi.st
Package odoo-9.0c_20160829-1.noarch already installed and latest version
Nothing to do
[root@bogon ~]#

postgresql is isntalled and running:

[root@bogon ~]# ps -ef | grep postgres

postgres 2085 1 0 06:42 ? 00:00:00 /usr/bin/postgres -D /var/lib/pgsql/data -p 5432

postgres 2647 2085 0 06:42 ? 00:00:00 postgres: logger process

postgres 2707 2085 0 06:42 ? 00:00:00 postgres: checkpointer process

postgres 2708 2085 0 06:42 ? 00:00:00 postgres: writer process

postgres 2709 2085 0 06:42 ? 00:00:00 postgres: wal writer process

postgres 2710 2085 0 06:42 ? 00:00:00 postgres: autovacuum launcher process

postgres 2711 2085 0 06:42 ? 00:00:00 postgres: stats collector process

root 13455 12708 0 06:51 pts/1 00:00:00 grep --color=auto postgres

however the systemctl command failed to start odoo

[root@bogon ~]# systemctl | grep odoo

● odoo.service               loaded     failed     failed              Odoo Open Source ERP and CRM

[root@bogon ~]#

how can I check what's wrong was there?

the Odoo config file:

[root@bogon ~]# more /etc/odoo/openerp-server.conf
[options]
; This is the password that allows database operations:
; admin_passwd = admin
db_host = 127.0.0.1
db_port = False
db_user = postgres
db_password = postgres
addons_path = /usr/lib/python2.7/site-packages/openerp/addons
logfile = /var/log/odoo/odoo.log
[root@bogon ~]#

the /var/log/odoo/odoo.log is an empty file

[root@bogon ~]# cat /var/log/odoo/odoo.log
[root@bogon ~]#