iiab/roles/nginx/tasks/main.yml

- name: Put the config file in place
  template: 
      src: '{{ item.src}}'  
      dest: '{{ item.dest }}'
  with_items:
    - { src: "server.conf",dest: "/etc/nginx/" }
    - { src: "nginx.conf",dest: "/etc/nginx/" }
    - { src: "usb-lib.conf",dest: "/etc/nginx/conf.d/" }
#    - { src: "admin-console.ini",dest: "/etc/uwsgi/apps-enabled/" }
# the above should be enough once uwsgi is started
#    - { src: "uwsgi.unit",dest: "/etc/systemd/system/uwsgi.socket" }
    - { src: 'ports.conf' , dest: '/etc/{{ apache_service }}/' , mode: '0644' }
  when: nginx_enabled

- name: Insure that apache2 is not running -- we may need port swap
  systemd:
    name: apache2
    state: stopped

# optional services
- name: Install config for Admin Console
  template: 
    src: admin-console-nginx.conf
# Comment one or the other to revert from nginx back to apache2, if required
#    src: admin-console-apache.conf
    dest: /etc/nginx/conf.d/admin-console.conf
  when: admin_console_enabled and nginx_enabled

# the below slides in nginx's proxypass config files for apache on localhost
# via the ports.conf file installed above
- name: Install proxpass to apache running on localhost port {{ apache_port }}
  include_tasks: uses_apache.yml
  when: nginx_enabled

# the below task contains the same logic contained in the playbooks to enable
# 'runrole nginx' to do the right thing but with the 'src' path set to role's
# templates path ie roles/<rolename>/template/

- name: Install proxpass to other services 'dual mode' roles
  include_tasks: only_nginx.yml
  when: nginx_enabled

- name: Stop and disable nginx when not nginx_enabled
  systemd:
    name: nginx
    state: stopped
    enabled: false
  when: not nginx_enabled

- name: Disable Apache port {{ apache_port }} localhost only
  template:
    dest: /etc/{{ apache_service }}/ports.conf
    src: stock-apache-ports.conf
  when: not nginx_enabled

# should have the logic to handle both modes in the playbook
- name: Enable Apache (a2ensite) for 'dual mode' for the role when NGINX is diabled
  include_tasks: disable.yml
  when: not nginx_enabled

- name: Since we stopped apache2, start it again
  systemd:
    name: apache2
    state: restarted
    enabled: true
    daemon_reload: yes
  when: apache_enabled

- name: Restart nginx to pick up the config files installed
  systemd:
    name: nginx
    state: restarted
    enabled: true
  when: nginx_enabled

#- name: Enable the uwsgi systemd service
#  systemd:
#    name: uwsgi
#    state: restarted
#    enabled: true
#  when: admin_console_enabled and nginx_enabled