The playbook install-edge.yml will perform an installation of Apigee Edge. Version 4.16.xx through 4.18.01 can be installed from this playbook.
The upgrade process will be engaged when you invoke the playbook like this:
ansible-playbook install-edge.yml
This playbook assumes that you followed the instructions for setting up (Ansible)[https://github.com/carlosfrias/apigee-opdk-playbook-setup-ansible].