Update Device Emulator to use Redis

Author: jason-fox

docker-compose/common.yml

@@ -35,6 +35,21 @@ services:
     healthcheck:
       test: (wget --server-response --spider --quiet  http://context/user-context.jsonld 2>&1 | awk 'NR==1{print $$2}'|  grep -q -e "200") || exit 1
 
+  # Cache for Sensor Data Readings
+  redis-sensors:
+    labels:
+      org.fiware: 'tutorial'
+    image: redis:8.2.0-alpine
+    container_name: redis
+    hostname: redis-for-sensors
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis-data:/data
+    healthcheck:
+      test: ["CMD", "redis-cli","ping"]
+      interval: 10s
+
   # Databases
   mongo-db:
     labels:
@@ -95,6 +110,8 @@ services:
     image: quay.io/fiware/tutorials.iot-devices
     hostname: iot-sensors
     container_name: fiware-iot-devices
+    depends_on:
+      - redis-sensors
     networks:
       - default
     expose:
@@ -107,6 +124,7 @@ services:
       - WEB_APP_PORT=${TUTORIAL_APP_PORT} # Port used by the content provider proxy and web-app for viewing data
       - IOTA_HTTP_HOST=iot-agent
       - IOTA_HTTP_PORT=${IOTA_SOUTH_PORT}
+      - REDIS_HOST=redis-for-sensors
 
   # Tutorial acts as a Farm Management Information System
   tutorial:
@@ -144,6 +162,7 @@ networks:
 volumes:
   mongo-db: ~
   mongo-config: ~
+  redis-data: ~
   data-models:
     driver: local
     driver_opts: