Prometheus Aggregation Gateway is a aggregating push gateway for Prometheus. As opposed to the official Prometheus Pushgateway, this service aggregates the sample values it receives.
- Counters where all labels match are added up.
- Histograms are added up; if bucket boundaries are mismatched then the result has the union of all buckets and counts are given to the lowest bucket that fits.
- Gauges are also added up (but this may not make any sense)
- Summaries are discarded.
Send metrics in Prometheus format to /metrics/
E.g. if you have the program running locally:
echo 'http_requests_total{method="post",code="200"} 1027' | curl --data-binary @- http://localhost/metrics/Now you can push your metrics using your favorite Prometheus client.
E.g. in Python using prometheus/client_python:
from prometheus_client import CollectorRegistry, Counter, push_to_gateway
registry = CollectorRegistry()
counter = Counter('some_counter', "A counter", registry=registry)
counter.inc()
push_to_gateway('localhost', job='my_job_name', registry=registry)Then have your Prometheus scrape metrics at /metrics.
Available on DockerHub weaveworks/prom-aggregation-gateway
Comparison to Prometheus Pushgateway
According to https://prometheus.io/docs/practices/pushing/:
The Pushgateway never forgets series pushed to it and will expose them to Prometheus forever...
The latter point is especially relevant when multiple instances of a job differentiate their metrics in the Pushgateway via an instance label or similar.
This restriction makes the Prometheus pushgateway inappropriate for the usecase of accepting metrics from a client-side web app, so we created this one to aggregate counters from multiple senders.
Prom-aggregation-gateway presents a similar API, but does not attempt to be a drop-in replacement.
See https://github.com/weaveworks/promjs/ for a JS client library for Prometheus that can be used from within a web app.
If you have any questions about, feedback for or problems with prom-aggregation-gateway:
- Invite yourself to the Weave Users Slack.
- Ask a question on the #general slack channel.
- File an issue.
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