added prometheus metrics exporter

This commit is contained in:
Jenny Danzmayr 2024-03-29 23:38:04 +01:00
parent b173068a76
commit 5cb6f87445
6 changed files with 51 additions and 1 deletions

View file

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from django.conf import settings
from django.contrib.auth import get_user_model
from django.core.cache import cache
from c3nav.mapdata.models.report import Report
if settings.METRCIS:
from prometheus_client import Gauge
from prometheus_client.core import REGISTRY, CounterMetricFamily
from prometheus_client.registry import Collector
users_total = Gauge('c3nav_users_total', 'Total number of users')
users_total.set_function(lambda: get_user_model().objects.count())
reports_total = Gauge('c3nav_reports_total', 'Total number of reports')
reports_total.set_function(lambda: Report.objects.count())
reports_open = Gauge('c3nav_reports_open', 'Number of open reports')
reports_open.set_function(lambda: Report.objects.filter(open=True).count()),
class APIStatsCollector(Collector):
def collect(self):
if settings.CACHES['default']['BACKEND'] == 'django.core.cache.backends.redis.RedisCache':
client = cache._cache.get_client()
for key in client.keys(f"*{settings.CACHES['default'].get('KEY_PREFIX', '')}apistats__*"):
key = key.decode('utf-8').split(':', 2)[2]
yield CounterMetricFamily(f'c3nav_{key}', key, value=cache.get(key))
def describe(self):
return list()
REGISTRY.register(APIStatsCollector())