Add roles to start and stop nginx

playbooks/roles/mlapi/tasks/main.yml

 ---
-- name: stop running services
+- name: stop celery
   service: name=celery state=stopped
+  sudo: True
+
+- name: stop nginx
   service: name=nginx state=stopped
+  sudo: True
+
+- name: stop ml-service-api
   service: name=ml-service-api state=stopped
   sudo: True
 
@@ -106,8 +112,14 @@
   template: src=default.j2 dest=/etc/nginx/sites-available/default
   sudo: True
 
-- name: start up services
+- name: start celery
   service: name=celery state=started
+  sudo: True
+
+- name: start nginx
   service: name=nginx state=started
+  sudo: True
+
+- name: start ml-service-api
   service: name=ml-service-api state=started
-  sudo: True
\ No newline at end of file
+  sudo: True

playbooks/roles/mlapi/templates/default.j2

 server {
-    listen 8888;
+    listen {{nginx_listen_port}};
     server_name {{ansible_hostname}};
 
     # https://docs.djangoproject.com/en/dev/howto/static-files/#serving-static-files-in-production

playbooks/roles/mlapi/vars/main.yml

@@ -6,4 +6,5 @@ ml_api_settings: ml_service_api.settings
 nltk_data_dir: /usr/share/nltk_data
 remote_user: ubuntu
 ml_branch: master
-ml_api_branch: dev
\ No newline at end of file
+ml_api_branch: dev
+nginx_listen_port: 8888
\ No newline at end of file