Deploying a custom exporter for Prometheus
After configuring all the components, you need to deploy the exporter that Prometheus calls to get data from Redis; this service will be called service1. Remember that Redis was being used to persist temporary data that comes from the Mosquitto topic on the far edge. Before deploying this service, let’s understand the exporter container source code:
from flask import Response, Flask, request, jsonify
import prometheus_client
from prometheus_client import Gauge
import redis
import os
import sys
import json
t = Gauge('weather_metric1', 'temperature')
h = Gauge('weather_metric2', 'humidity')
rhost = os.environ['REDIS_HOST']
rauth = os.environ['REDIS_AUTH']
stopic = os.environ['SENSOR_TOPIC']
r = redis.StrictRedis(host=rhost,\
port=6379,db=0,password=rauth,\
decode_responses...
