/prometheus-metrics-combiner

Primary LanguageGoMIT LicenseMIT

Prometheus Metrics Combiner

Build

A simple HTTP server that fetches Prometheus metrics from multiple upstream services, combines them, and exposes them on a single /metrics endpoint.

For example, if you have a Kubernetes pod with multiple containers with separate metrics endpoints you can use this to expose a single endpoint for scraping.

Building

This requires Go 1.25

go build

Usage

The server is configured via command-line flags.

Command-Line Flags

  • -port <number>: The port for the HTTP server to listen on (default 8080)
  • -url <url>: An upstream URL to fetch metrics from, can be specified multiple times
  • -prefix <string>: Optional filter, only lines starting with this prefix will be included in the output, can be specified multiple times