Installing ansible tower latest to RHEL7.4

Hi

I'm trying to install ansible tower latest on my RHEL7.4, but no luck, I installed all the instructions like installing phython, development tools, ansible, etc. The server is 28GRAM but no idea below why it's still complaining about lacking ram. And password was added, also the locahost was change to the host name on the inventory file.

[root@xxxx01 ansible-tower-setup-bundle-3.2.2-1.el7]# egrep -i "error|fail|warn|fatal" setup.log
[DEPRECATION WARNING]: The use of 'include' for tasks has been deprecated. Use 'import_tasks' for static inclusions or 'include_tasks' for
dynamic inclusions. This feature will be removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False
[DEPRECATION WARNING]: include is kept for backwards compatibility but usage is discouraged. The module documentation details page may explain
more about this rationale.. This feature will be removed in a future release. Deprecation warnings can be disabled by setting
deprecation_warnings=False in ansible.cfg.
[WARNING]: Could not match supplied host pattern, ignoring: database
[WARNING]: Could not match supplied host pattern, ignoring: instance_group_*
[WARNING]: Could not match supplied host pattern, ignoring: CentOS-7*
[WARNING]: Could not match supplied host pattern, ignoring: Ubuntu-14.04
[WARNING]: Could not match supplied host pattern, ignoring: Ubuntu-16.04
[WARNING]: Could not match supplied host pattern, ignoring: OracleLinux-7*
[WARNING]: Could not match supplied host pattern, ignoring: Ubuntu-*
[WARNING]: Could not match supplied host pattern, ignoring: isolated_group_*
TASK [awx_install : Fail play when grabbing SECRET_KEY fails] ************************************************************************************
[WARNING]: Unable to find '/etc/tower/conf.d' in expected paths.
[WARNING]: Unable to find '/etc/tower' in expected paths.
TASK [preflight : Preflight check - Fail if this machine lacks sufficient RAM.] ******************************************************************
fatal: [sdcgigdcapmdw01]: FAILED! => {"changed": false, "msg": "file not found: /var/lib/awx/.tower_version"}
fatal: [sdcgigdcapmdw01]: FAILED! => {"changed": false, "msg": "Please configure passwords in the inventory file before running setup"}
sdcgigdcapmdw01 : ok=16 changed=1 unreachable=0 failed=1

Thanks!