moves discern over to celery, creates some deploy plays

playbooks/edx-east/deploy_certs.yml

+- name: Deploy certs
+  hosts: all
+  sudo: True
+  gather_facts: True
+  roles:
+    - common
+    - supervisor
+    - certs

playbooks/edx-east/deploy_devpi.yml

+- name: Deploy devpi
+  hosts: all
+  sudo: True
+  gather_facts: True
+  roles:
+    - common
+    - supervisor
+    - devpi

playbooks/edx-east/deploy_discern.yml

+- name: Deploy discern
+  hosts: all
+  sudo: True
+  gather_facts: True
+  roles:
+    - common
+    - supervisor
+    - discern

playbooks/roles/discern/defaults/main.yml

@@ -11,6 +11,7 @@ DISCERN_MYSQL_USER: 'root'
 DISCERN_MYSQL_PASSWORD: ''
 DISCERN_MYSQL_HOST: 'localhost'
 DISCERN_MYSQL_PORT: '3306'
+DISCERN_LANG: "en_US.UTF-8"
 
 
 discern_app_dir: "{{ COMMON_APP_DIR }}/discern"
@@ -38,6 +39,7 @@ discern_branch: dev
 discern_gunicorn_port: 8070
 discern_gunicorn_host: 127.0.0.1
 
+discern_worker_mult: 2
 discern_env_config:
   ACCOUNT_EMAIL_VERIFICATION: "mandatory"
   AWS_SES_REGION_NAME: "us-east-1"

playbooks/roles/discern/handlers/main.yml

 ---
 - name: discern | restart discern
-  service: name=discern state=restarted
+  supervisorctl: >
+    name=discern
+    supervisorctl_path={{ supervisor_ctl }}
+    config={{ supervisor_cfg }}
+    state=restarted
 
-- name: discern | restart celery
-  service: name=celery state=restarted
+- name: discern | restart discern_celery
+  supervisorctl: >
+    name=discern_celery
+    supervisorctl_path={{ supervisor_ctl }}
+    config={{ supervisor_cfg }}
+    state=restarted

playbooks/roles/discern/tasks/deploy.yml

 ---
+
+
+- name: discern | See if supervisord config file `discern.conf` is installed
+  shell: "[ -f {{ supervisor_cfg_dir }}/discern.conf ] && echo 'Found' || echo ''"
+  register: discern_installed
+  tags:
+  - deploy
+
+- name: discern | See if supervisord `discern_celery.conf` is installed
+  shell: "[ -f {{ supervisor_cfg_dir }}/discern_celery.conf ] && echo 'Found' || echo ''"
+  register: discern_celery_installed
+  tags:
+  - deploy
+
+# Stop discern service.
+- name: discern | stop discern service
+  supervisorctl: >
+    name=discern
+    supervisorctl_path={{ supervisor_ctl }}
+    config={{ supervisor_cfg }}
+    state=stopped
+  when: discern_installed.stdout == 'Found'
+  notify: discern | restart discern
+  tags:
+  - deploy
+
+- name: discern | stop discern_celery service
+  supervisorctl: >
+    name=discern_celery
+    supervisorctl_path={{ supervisor_ctl }}
+    config={{ supervisor_cfg }}
+    state=stopped
+  when: discern_celery_installed.stdout == 'Found'
+  notify: discern | restart discern_celery
+  tags:
+  - deploy
+
+- name: discern | create supervisor scripts - discern, discern_celery
+  template: >
+    src={{ item }}.conf.j2 dest={{ supervisor_cfg_dir }}/{{ item }}.conf
+    owner={{ supervisor_user }} group={{ common_web_user }} mode=0644
+  with_items: ['discern', 'discern_celery']
+  tags:
+  - deploy
+
 #Upload config files for django (auth and env)
 - name: discern | create discern application config env.json file
   template: src=env.json.j2 dest={{ discern_app_dir }}/env.json
   sudo_user: "{{ discern_user }}"
   notify:
-    - discern | restart celery
+    - discern | restart discern_celery
     - discern | restart discern
   tags:
     - deploy
@@ -13,7 +58,7 @@
   template: src=auth.json.j2 dest={{ discern_app_dir }}/auth.json
   sudo_user: "{{ discern_user }}"
   notify:
-    - discern | restart celery
+    - discern | restart discern_celery
     - discern | restart discern
   tags:
     - deploy
@@ -22,7 +67,7 @@
   git: dest={{ discern_code_dir }} repo={{ discern_source_repo }} version={{ discern_branch }}
   sudo_user: "{{ discern_user }}"
   notify:
-    - discern | restart celery
+    - discern | restart discern_celery
     - discern | restart discern
   tags:
     - deploy
@@ -31,7 +76,7 @@
   git: dest={{ discern_ease_code_dir}} repo={{ discern_ease_source_repo }} version={{ discern_ease_version }}
   sudo_user: "{{ discern_user }}"
   notify:
-    - discern | restart celery
+    - discern | restart discern_celery
     - discern | restart discern
   tags:
     - deploy

playbooks/roles/discern/tasks/main.yml

@@ -6,7 +6,7 @@
     createhome=no
     shell=/bin/false
 
-- name: discern | create discern app and data dir
+- name: discern | create discern app dirs owned by discern
   file: >
     path="{{ item }}"
     state=directory
@@ -14,9 +14,13 @@
     group="{{ common_web_group }}"
   with_items:
     - "{{ discern_app_dir }}"
-    - "{{ discern_data_dir }}"
     - "{{ discern_venvs_dir }}"
 
+- name: discern | create discern data dir, owned by {{ common_web_user }}
+  file: >
+    path="{{ discern_data_dir }}" state=directory
+    owner="{{ common_web_user }}"
+
 - name: discern | install debian packages that discern needs
   apt: pkg={{ item }} state=present
   with_items: discern_debian_pkgs

playbooks/roles/discern/templates/discern.conf.j2

-# gunicorn
-
-description "ML API Server"
-author "Vik Paruchuri <vik@edx.org>"
-
-start on runlevel [2345]
-stop on runlevel [!2345]
-
-respawn
-respawn limit 3 30
-
-env PID=/var/run/gunicorn/discern.pid
-env WORKERS={{ ansible_processor_cores * 2 }}
-env PORT={{ discern_gunicorn_port }}
-env ADDRESS={{ discern_gunicorn_host }}
-env LANG=en_US.UTF-8
-env DJANGO_SETTINGS_MODULE={{ discern_settings }}
-
-chdir {{ discern_code_dir }}
-setuid {{ discern_user }}
-
-exec {{ discern_venv_bin }}/gunicorn --preload -b $ADDRESS:$PORT -w $WORKERS --timeout=30 --pythonpath={{ discern_code_dir }} discern.wsgi
+[program:discern]
+
+{% if ansible_processor|length > 0 %}
+command={{ discern_venv_bin }}/gunicorn --preload -b {{ discern_gunicorn_host }}:{{ discern_gunicorn_port }} -w  {{ ansible_processor|length * discern_worker_mult }} --timeout=30 --pythonpath={{ discern_code_dir }} discern.wsgi
+{% else %}
+command={{ discern_venv_bin }}/gunicorn --preload -b {{ discern_gunicorn_host }}:{{ discern_gunicorn_port }} -w  {{ discern_worker_mult }} --timeout=30 --pythonpath={{ discern_code_dir }} discern.wsgi
+{% endif %}
+user={{ common_web_user }}
+directory={{ discern_code_dir }}
+environment=LANG={{ DISCERN_LANG }},DJANGO_SETTINGS_MODULE={{ discern_settings }},SERVICE_VARIANT=discern
+stdout_logfile={{ supervisor_log_dir }}/%(program_name)-stdout.log
+stderr_logfile={{ supervisor_log_dir }}/%(program_name)-stderr.log

playbooks/roles/discern/templates/discern_celery.conf.j2

+[program:discern_celery]
+
+command={{ discern_venv_bin }}/python {{ discern_code_dir }}/manage.py celeryd --loglevel=info --settings=edx_discern.aws --pythonpath={{ discern_code_dir }} -B --autoscale=4,1 --schedule={{ discern_data_dir }}/celerybeat-schedule
+
+user={{ common_web_user }}
+directory={{ discern_code_dir }}
+
+environment=DJANGO_SETTINGS_MODULE=edx_discern.aws,SERVICE_VARIANT=discern
+
+stdout_logfile={{ supervisor_log_dir }}/%(program_name)-stdout.log
+stderr_logfile={{ supervisor_log_dir }}/%(program_name)-stderr.log
+