Playbooks for usage example:

1. Edit hosts file.
2. Edit group_vars all.yml
3. Ping your hosts ansible-playbook -i hosts -e "servers=all" playbooks/ping.yml
4. Install CERTM ansible-playbook -i hosts -e "servers=all" roles/ansible_certm/ansible_certm.yml

Vagrantfile:

1. By default Vagrantfile create 4 VMs based on Centos 8.