port gunicorn setup from #354.

Dockerfile

@@ -1,19 +1,20 @@
 FROM python:3.8.3-alpine3.12 as base
 FROM base as builder
-RUN apk --no-cache --update-cache add gcc python3 python3-dev py-pip build-base wget
+RUN apk --no-cache --update-cache add gcc python3 python3-dev py-pip build-base wget libffi-dev
 RUN ln -s /usr/include/locale.h /usr/include/xlocale.h
-RUN pip install pipenv
+RUN pip install pipenv gunicorn gevent
 RUN mkdir -p /src/ngsi-timeseries-api
 COPY Pipfile /src/ngsi-timeseries-api/Pipfile
 COPY Pipfile.lock /src/ngsi-timeseries-api/Pipfile.lock
 RUN cd /src/ngsi-timeseries-api && { pipenv lock -r > /requirements.txt; }
 RUN pip install -r /requirements.txt
 
 FROM base
-RUN apk --no-cache add curl
+RUN apk --no-cache add curl supervisor
 COPY --from=builder /usr/local /usr/local
 COPY . /src/ngsi-timeseries-api/
-WORKDIR /src/ngsi-timeseries-api/src
-ENV PYTHONPATH=$PWD:$PYTHONPATH
+COPY conf/supervisord.conf /etc/supervisord.conf
 
-CMD python app.py
+EXPOSE 8668
+
+CMD ["supervisord", "-c", "/etc/supervisord.conf"]

conf/supervisord.conf

@@ -0,0 +1,10 @@
+[supervisord]
+nodaemon=true
+
+[program:quantumleap]
+command=gunicorn -b 0.0.0.0:8668 uwsgi --log-level DEBUG --worker-class gevent --worker-connections 10000 --config gunicorn.conf.py
+directory=/src/ngsi-timeseries-api/src
+autostart=true
+autorestart=true
+startsecs=10
+startretries=3

src/app.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from utils.hosts import LOCAL
 
 
@@ -10,3 +11,4 @@
                 # validate_responses=True, strict_validation=True
                 )
     app.run(host=LOCAL, port=8668)
+    application = app.app

src/gunicorn.conf.py

@@ -0,0 +1,3 @@
+import multiprocessing
+
+workers = multiprocessing.cpu_count() * 4 + 1

src/uwsgi.py

@@ -0,0 +1,8 @@
+import connexion
+app = connexion.FlaskApp(__name__, port=8668, specification_dir='../specification/')
+app.add_api('quantumleap.yml',
+            arguments={'title': 'QuantumLeap V2 API'},
+            pythonic_params=True,
+            # validate_responses=True, strict_validation=True
+            )
+application = app.app