ERROR! the role 'prometheus' was not found in /root/dynamic-inventory/roles:/root/.ansible/roles:/usr/share/ansible/roles:/etc/ansible/roles:/root/dynamic-inventory
The error appears to be in '/root/dynamic-inventory/playbook.yml': line 6, column 7, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
roles:
- prometheus
^ here