Move gunicorn install to top level playbook, parameterize num_workers

playbooks/edxapp_prod.yml

@@ -6,5 +6,6 @@
   roles:
     - common
     - nginx
+    - gunicorn
     - lms
     - ruby

playbooks/edxapp_stage.yml

@@ -6,5 +6,6 @@
   roles:
     - common
     - nginx
+    - gunicorn
     - lms
     - ruby

playbooks/roles/gunicorn/templates/lms.conf.j2

@@ -12,7 +12,7 @@ respawn limit 3 30
 env PID=/var/tmp/lms.pid
 #env NEW_RELIC_CONFIG_FILE=${app_base_dir}/opt/wwc/newrelic.ini
 #env NEWRELIC=${app_base_dir}/bin/newrelic-admin
-env WORKERS=1
+env WORKERS=${lms_num_workers}
 env PORT=8000
 env LANG=en_US.UTF-8
 env DJANGO_SETTINGS_MODULE=lms.envs.aws

playbooks/roles/gunicorn/vars/main.yml

+---
+lms_num_workers: 1
\ No newline at end of file

playbooks/roles/lms/tasks/main.yml

@@ -115,5 +115,5 @@
   - lms
   - cms
   
-- include: ../../gunicorn/tasks/main.yml 
+# Creates LMS upstart file
 - include: ../../gunicorn/tasks/upstart.yml service_variant=lms