# Icinga/icinga2

The core of our monitoring platform with a powerful configuration language and REST API.

Repository: https://github.com/Icinga/icinga2
Canonical: https://ross.abutalabs.com/products/icinga2
Homepage: https://icinga.com/docs/icinga2/latest
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: icinga, monitoring, notification, cluster, metrics, elastic, graylog, influxdb, graphite, opentsdb, rest-api, tls, distributed-monitoring, performance
Last push: 2026-08-26T15:14:04+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 4753, "days_push": 7, "days_rel": 15, "gap_med": 0.0, "n_releases_24m": 29}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2233, forks 617 (observed 2026-08-28T04:06:29.229002+00:00)

## What it is
Icinga 2 is the core monitoring server of the Icinga stack, checking availability of network resources, sending outage notifications, and generating performance data. It features a powerful configuration DSL, a REST API, and supports scalable distributed monitoring across multiple locations.

## Use cases
- monitor server and network infrastructure uptime
- set up alerting when services go down
- build a distributed monitoring cluster across data centers
- export performance metrics to graphite or influxdb
- self-hosted nagios alternative with a rest api
- monitor hybrid cloud and on-prem environments

## When to choose
- you need scalable, self-hosted infrastructure monitoring with notifications
- you want a REST API and a flexible configuration language for automation
- you run large or multi-site environments needing distributed monitoring

## When to avoid
- you only want lightweight application/APM tracing rather than host and service checks
- you need a turnkey UI without deploying the separate Icinga Web 2 component
- you prefer a fully managed SaaS monitoring solution

## Facets
- artifact type: application
- maturity: stable
- function: monitoring, alerting, api-framework, configuration-management
- domain: monitoring, infrastructure-as-code, self-hosted, microservices
- platform: windows, cross-platform, self-hosted
- tags: icinga, nagios-compatible, distributed-monitoring, rest-api, dsl, time-series-metrics, infrastructure-monitoring, gpl, devops, linux, web-server

## Member repositories
- Icinga/icinga2 (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:29.229002+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 2026-08-30T02:44:23.755495+00:00, confidence not recorded.
  - readme: https://github.com/Icinga/icinga2 (fetched 2026-08-28T04:06:29.229002+00:00, sha 6174522854a3)
  - homepage: https://icinga.com/docs/icinga2/latest (fetched 2026-08-29T10:25:24.080447+00:00, sha 00c819803649)
  - site_page: https://icinga.com/docs (fetched 2026-08-29T10:25:24.091657+00:00, sha a9f26fd220b0)
  - site_page: https://icinga.com/docs/icinga-2/latest (fetched 2026-08-29T10:25:24.098971+00:00, sha 00c819803649)
  - site_page: https://icinga.com/docs/icinga-2/latest/doc/02-installation (fetched 2026-08-29T10:25:24.100644+00:00, sha b4523270b7dc)
  - site_page: https://icinga.com/docs/icinga-2/latest/doc/02-installation/01-Debian (fetched 2026-08-29T10:25:24.133035+00:00, sha 63801e6859a8)
  - site_page: https://icinga.com/docs/icinga-2/latest/doc/02-installation/02-Ubuntu (fetched 2026-08-29T10:25:24.159709+00:00, sha dd858203172a)
  - site_page: https://icinga.com/docs/icinga-2/latest/doc/02-installation/03-Raspberry-Pi-OS (fetched 2026-08-29T10:25:24.197606+00:00, sha 5ca9ca10a9a1)
  - site_page: https://icinga.com/docs/icinga-2/latest/doc/02-installation/04-Fedora (fetched 2026-08-29T10:25:24.230544+00:00, sha d6abea732ab3)
  - site_page: https://icinga.com/pricing (fetched 2026-08-29T10:25:24.083613+00:00, sha ec7061f7d1e1)
- Data as of 2026-08-30T08:39:29.467469+00:00.