# sensu/sensu

Monitoring for today's infrastructure.

Repository: https://github.com/sensu/sensu
Canonical: https://ross.abutalabs.com/products/sensu
Homepage: https://sensu.io
Language: Ruby
License: MIT
License Family: permissive
Topics: monitoring
Archived: true
Last push: 2019-12-31T23:01:24+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5532, "days_push": 2437, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2865, forks 378 (observed 2026-08-28T04:07:26.596695+00:00)

## What it is
Sensu 1.x (Sensu Core) is a Ruby-based, scalable monitoring framework for composing infrastructure monitoring systems with checks, handlers, and plugins. The project reached end-of-life on December 31, 2019 and has been superseded by Sensu Go.

## Use cases
- monitor servers and infrastructure health
- alert on failed service checks
- collect monitoring events and forward them to databases or incident tools
- monitor cloud platforms like AWS and Kubernetes
- replace Nagios-style check-based monitoring

## When to choose
- maintaining a legacy Sensu 1.x deployment that cannot yet be migrated
- studying the architecture of the original Sensu project

## When to avoid
- starting any new monitoring project - this version is end-of-life and its package repositories are gone
- you want the actively developed version - use Sensu Go instead
- you need commercial support or current integrations

## Facets
- artifact type: framework
- maturity: abandoned
- function: monitoring, alerting
- domain: monitoring, infrastructure-as-code, cloud-computing
- platform: windows, cross-platform, self-hosted
- tags: observability-pipeline, infrastructure-monitoring, end-of-life, superseded-by-sensu-go, ruby, publish-subscribe, checks-and-handlers, devops, linux

## Member repositories
- sensu/sensu (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:26.596695+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:48:29.083562+00:00, confidence not recorded.
  - readme: https://github.com/sensu/sensu (fetched 2026-08-28T04:07:26.596695+00:00, sha 1309cfb1af9c)
  - homepage: https://sensu.io (fetched 2026-08-29T09:56:09.524967+00:00, sha 7c7b990c753f)
  - site_page: https://sensu.io/features (fetched 2026-08-29T09:56:09.530762+00:00, sha 03fa941f60f0)
  - site_page: https://sensu.io/features/monitoring-integrations (fetched 2026-08-29T09:56:09.535225+00:00, sha a002f254ccb8)
  - site_page: https://docs.sensu.io/sensu-go/latest/installation/verify (fetched 2026-08-29T09:56:09.538883+00:00, sha 32c9aced86a2)
  - site_page: https://docs.sensu.io/sensu-go/latest/reference/assets (fetched 2026-08-29T09:56:09.540473+00:00, sha 85cfc0f93529)
  - site_page: https://sensu.io/pricing (fetched 2026-08-29T09:56:09.532950+00:00, sha 1f1a3d773389)
  - site_page: https://sensu.io/oops (fetched 2026-08-29T09:56:09.543238+00:00, sha 3a0ead35520d)
- Data as of 2026-08-30T08:39:29.467469+00:00.