flask_app.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os

import prometheus_client
from flask import request, Response, Flask
from prometheus_client import Counter, Gauge, Summary, Histogram
from prometheus_client.core import  CollectorRegistry
from prometheus_client.multiprocess import MultiProcessCollector

from string import ascii_letters
from random import choice

REGISTRY = CollectorRegistry(auto_describe=False)

MultiProcessCollector(REGISTRY)


requests_total = Counter("app:requests_total", "Total count of requests", ["method", "url_rule"], registry=REGISTRY)


app = Flask(__name__)
app.debug = True


@app.route("/metrics")
def metrics():
    text = "# Process in {0}\n".format(os.getpid())
    return Response(text + prometheus_client.generate_latest(REGISTRY), mimetype="text/plain")


@app.route('/<path:path>')
@app.route('/')
def index(path='/'):
    requests_total.labels(method=request.method, url_rule="total").inc()

    rnd = ''.join([choice(ascii_letters) for x in xrange(10)])

    text = "# Process in {0} rnd={1}\n".format(os.getpid(), rnd)

    return Response(text, mimetype="text/plain")

application = app
print("Debug app init")