cfb246b804
With Kuryr the CNI requests can take a considerable time given that it has to wait for a VIF from Neutron. Let's increase the number of buckets to have more meaningful data. Change-Id: I74a1ef3139df0f989a5b7d4b2c72bd977b6e7a35
72 lines
2.6 KiB
Python
72 lines
2.6 KiB
Python
# Copyright 2020 Red Hat, Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import flask
|
|
import prometheus_client
|
|
from prometheus_client.exposition import generate_latest
|
|
|
|
from oslo_config import cfg
|
|
from oslo_log import log as logging
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
CONF = cfg.CONF
|
|
_INF = float("inf")
|
|
|
|
|
|
class CNIPrometheusExporter(object):
|
|
"""Provides metrics to Prometheus"""
|
|
|
|
def __init__(self):
|
|
self.application = flask.Flask('prometheus-exporter')
|
|
self.ctx = None
|
|
self.application.add_url_rule(
|
|
'/metrics', methods=['GET'], view_func=self.metrics)
|
|
self.headers = {'Connection': 'close'}
|
|
self._create_metric()
|
|
|
|
def update_metric(self, labels, duration):
|
|
"""Observes the request duration value and count it in buckets"""
|
|
self.cni_requests_duration.labels(**labels).observe(duration)
|
|
|
|
def metrics(self):
|
|
"""Provides the registered metrics"""
|
|
collected_metric = generate_latest(self.registry)
|
|
return flask.Response(collected_metric, mimetype='text/plain')
|
|
|
|
def run(self):
|
|
# Disable obtrusive werkzeug logs.
|
|
logging.getLogger('werkzeug').setLevel(logging.WARNING)
|
|
|
|
address = '::'
|
|
try:
|
|
LOG.info('Starting CNI Prometheus exporter')
|
|
self.application.run(
|
|
address, CONF.prometheus_exporter.cni_exporter_port)
|
|
except Exception:
|
|
LOG.exception('Failed to start Prometheus exporter')
|
|
raise
|
|
|
|
def _create_metric(self):
|
|
"""Creates a registry and records a new Histogram metric."""
|
|
self.registry = prometheus_client.CollectorRegistry()
|
|
metric_name = 'kuryr_cni_request_duration_seconds'
|
|
metric_description = 'The duration of CNI requests'
|
|
buckets = (10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120,
|
|
130, 140, 150, 160, 170, 180, _INF)
|
|
self.cni_requests_duration = prometheus_client.Histogram(
|
|
metric_name, metric_description,
|
|
labelnames={'command', 'error'}, buckets=buckets,
|
|
registry=self.registry)
|