Tornado prometheus

HTTP metrics for a tornado application

Installing

pip install tornado-prometheus

Usage

from tornado.web import Application, RequestHandler
from tornado.ioloop import IOLoop

from tornado_prometheus import PrometheusMixIn, MetricsHandler

class SampleApp(PrometheusMixIn, Application):
    pass

if __name__ == '__main__':
  app =  SampleApp([
      (r"/metrics", MetricsHandler),
  ])

  app.listen(8888)
  IOLoop.current().start()

Example output for metric route

# HELP tornado_http_request_duration_seconds HTTP request duration in seconds
# TYPE tornado_http_request_duration_seconds histogram
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="0.01",method="GET"} 0.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="0.05",method="GET"} 0.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="0.1",method="GET"} 1.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="0.5",method="GET"} 1.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="0.75",method="GET"} 1.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="1.0",method="GET"} 1.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="2.5",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="5.0",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="7.5",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="10.0",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="15.0",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="20.0",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="30.0",method="GET"} 2.0
tornado_http_request_duration_seconds_bucket{handler="StatusHandler",le="+Inf",method="GET"} 2.0

# HELP tornado_http_requests_total Total of HTTP requests processed
# TYPE tornado_http_requests_total counter
tornado_http_requests_total{handler="StatusHandler",method="GET",status="2xx"} 2.0