[Docker/deploy] add uwsgi stats and uwsgi-exporter sidecar

Dockerfile

@@ -4,6 +4,9 @@ COPY . /src/
 RUN pip install -e /src
 RUN pip install -r /src/docker/requirements.txt
 RUN cp /src/docker/pyramid.ini.j2 /pyramid.ini.j2
+# enable stats socket used by uwsgi prometheus exporter
+RUN echo "memory-report = true" >> /etc/uwsgi/uwsgi.ini
+RUN echo "stats = 127.0.0.1:8001" >> /etc/uwsgi/uwsgi.ini
 USER cubicweb
 ENV CW_INSTANCE=intranet
 RUN docker-cubicweb-helper create-instance

deploy/deployment.yaml

@@ -33,6 +33,9 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: intranet
+  annotations:
+    prometheus.io/scrape: true
+    prometheus.io/port: 9117
 spec:
   selector:
     matchLabels:
@@ -87,6 +90,13 @@ spec:
               memory: 500Mi
             limits:
               memory: 500Mi
+        - name: uwsgi-prometheus
+          image: timonwong/uwsgi-exporter
+          args:
+            - '--stats.uri'
+            - 'http://localhost:8001'
+          ports:
+            - containerPort: 9117
         - name: nginx
           image: r.intra.logilab.fr/library/nginx
           imagePullPolicy: Always