Custom httpd exporter

__main__.py

import requests
import time
from prometheus_client import start_http_server
from prometheus_client.core import Gauge, GaugeMetricFamily, CounterMetricFamily, REGISTRY


APP_URL = "http://localhost:80/server-status/?auto"

def get_metrics():
    resp = requests.get(url=APP_URL)
    byte_data = resp.content

    data = str(byte_data, 'UTF-8')

    lines = data.split('\n')

    return lines

def split_pair(pair=""):
    key_and_value = pair.split(':')
    value = key_and_value[1].strip()
    return float(value)

gauge = Gauge('gauge_name', 'gauge description')

class CustomCollector(object):
    def __init__(self):
        pass

    def collect(self):
        lines = get_metrics()
        server_threads = GaugeMetricFamily('httpd_server_threads', 'Number of workers available on the application server', labels=['worker_state'])
        for i in lines:
            if "ServerUptimeSeconds" in i:
                v = split_pair(i)
                yield CounterMetricFamily('httpd_server_uptime', 'How long the application server has been up', value=v)
            elif "CPULoad" in i:
                v = split_pair(i)
                yield GaugeMetricFamily('httpd_server_CPU_load', 'How many requests per second the server is processing', value=v)
            elif "BusyWorkers" in i:
                v = split_pair(i)
                server_threads.add_metric(['busy'], v)
            elif "IdleWorkers" in i:
                v = split_pair(i)
                server_threads.add_metric(['idle'], v)

        yield server_threads

# code to get gauge value here
# gauge.set(gauge_value)

if __name__ == "__main__":
    start_http_server(8080)
    REGISTRY.register(CustomCollector())
    while True: 
        time.sleep(1)