pyrra

Pyrra turns SLO management with Prometheus from a YAML nightmare into something humans can actually use. Write a high-level SLO definition, and Pyrra auto-generates the Prometheus recording rules, alerting rules, and error budget dashboards. One binary, one web UI, and your SLOs are managed without building custom Grafana dashboards from scratch.

If you're running Prometheus and need SLOs without hand-crafting recording rules, Pyrra is the fastest path. Sloth is the similar alternative that generates Prometheus rules from specs but with less active development. Google's SLO Generator works for multi-backend setups. Datadog and Nobl9 are the commercial SLO platforms.

The catch: Pyrra is tightly coupled to Prometheus — if your observability stack uses Datadog or Grafana Mimir natively, Pyrra doesn't help. The project has 1,400 stars and a small community, so edge cases may require reading source code. And SLOs only matter if your team actually acts on error budget burns — Pyrra gives you the data, but the organizational discipline is on you.