Deploying Redis to persist Mosquitto sensor data

To install our Redis to persist Mosquitto weather data, we are going to use Redis with persistence and a single list of messages. To deploy this Redis setup in your cluster, follow these steps:

1. Create the PersistentVolume to persist Redis data using the /mnt/data directory in the node:

   $ cat <<EOF | kubectl apply -f -
   apiVersion: v1
   kind: PersistentVolume
   metadata:
     name: db-pv-volume
     labels:
       type: local
   spec:
     storageClassName: manual
     capacity:
       storage: 5Gi
     accessModes:
       - ReadWriteOnce
     hostPath:
       path: "/mnt/data"
   EOF

2. Create a PersistentVolumeClaim using 5 GB of storage or more, depending on how many sensors and how much data you are processing:

   $ cat <<EOF | kubectl apply -f -
   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     ...