Merge branch 'L2SS-536-extend-prometheus-retention' into 'master'

L2SS-536: Extend prometheus retention, and keep the monitoring data between container restarts

Closes L2SS-536

See merge request !198

docker-compose/prometheus.yml

@@ -7,6 +7,9 @@
 
 version: '2'
 
+volumes:
+  prometheus-data: {}
+
 services:
   prometheus:
     image: prometheus
@@ -15,6 +18,8 @@ services:
     container_name: ${CONTAINER_NAME_PREFIX}prometheus
     networks:
       - control
+    volumes:
+      - prometheus-data:/prometheus
     ports:
       - "9090:9090"
     logging:

docker-compose/prometheus/Dockerfile

 FROM prom/prometheus
 
 COPY prometheus.yml /etc/prometheus/prometheus.yml
+
+CMD ["--config.file=/etc/prometheus/prometheus.yml", "--storage.tsdb.path=/prometheus", "--web.console.libraries=/usr/share/prometheus/console_libraries", "--web.console.templates=/usr/share/prometheus/consoles", "--storage.tsdb.retention.time=31d"]