---
- name: Generate nginx vhosts
  template:
    src=templates/{{ item.template }}
    dest="/home/ansible/ansible_playbooks/test.conf"
  with_items: nginx_vhosts

nginx_vhosts:
 - name: sandbox_ssl
   template: 'vhost_base.j2'
   server_name:
     - 'example'
   security_headers: yes
   ssl:
     certificate: '/etc/letsencrypt/live/example/fullchain.pem'
     certificate_key: '/etc/letsencrypt/live/example/privkey.pem'
   locations:
     -
       pattern: /
       extras:
         - 'deny all'

- 
  hosts: localhost
  roles:
    -
      role: nginx
      tags: nginx_local_test

fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'ansible.utils.unsafe_proxy.AnsibleUnsafeText object' has no attribute
 'template'\n\nThe error appears to be in '/home/ansible/ansible_playbooks/roles/nginx/tasks/main.yml': line 2, column 3, but may\nbe elsewhere in the file depending on the exact sy
ntax problem.\n\nThe offending line appears to be:\n\n---\n- name: Generate nginx vhosts\n  ^ here\n"}