Use the ansible-tower-service stop command to stop the Ansible services and then use the ansible-tower-service status command to ensure the services have been stopped.

ansible-tower-service stop
. . .
Stopping Tower
Redirecting to /bin/systemctl stop rh-postgresql10-postgresql.service
Redirecting to /bin/systemctl stop rabbitmq-server.service
Redirecting to /bin/systemctl stop nginx.service
Redirecting to /bin/systemctl stop supervisord.service

Create a tar archive of the /etc/ansible and /etc/tower directories.

tar -cf ansible.tar /etc/ansible
tar -cf tower.tar   /etc/tower

Additionally, assuming you ran setup.sh to install Ansible Tower, the following command can be run to backup Ansible Tower. Then, if you choose to reinstall Ansible Tower, the setup.sh -r <backup file> command can be used.

setup.sh -b

Use the yum remove command to uninstall the Ansible, RabbitMQ and Python packages.

yum remove ansible-tower\*
yum remove rabbitmq-server
yum remove rh-python36-*

Remove the Postgres script.

rm /etc/profile.d/rh-postgresql10-env.sh

Remove the following directories.

rm -rf /etc/ansible
rm -rf /etc/tower
rm -rf /var/lib/pgsql
rm -rf /var/lib/awx
rm -rf /var/lib/rabbitmq
rm -rf /var/opt/rh/rh-postgresql10/lib/pgsql/data

Use the yum clean command to clean the Ansible Tower repos.

yum clean metadata --enablerepo="ansible-tower,ansible-tower-dependencies"

Ensure the rpm command returns no standard out.

rpm -qa | grep ansible-tower