SETUP ========= 1. Copy `group_vars/all.yaml.example` to `group_vars/all.yaml` 2. Fill `group_vars/all.yaml` with the gateway hostname and the content of the `user_ca_key` 3. Add the gateway hostname to `inventory`, set `ansible_host` and `ansible_user` 4. Add the ca hostname to `inventory`, set `ansible_host` and `ansible_user` 5. Add the ca\_request hostname to `inventory`, set `ansible_host` and `ansible_user`