Munin
Munin is free, open-source software for monitoring networked resources and examining performance problems and trends.
What Munin is
Munin is free, open-source software for monitoring networked resources and examining performance problems and trends. It runs on Linux in a self-hosted setup, with a master that regularly connects to monitored nodes to collect metrics. The maker says servers are polled every five minutes. Munin displays results as graphs in a web interface and stores data in RRD files. It can monitor computers, networks, storage area networks, applications, and weather measurements. More than 500 plugins are available, and users can write custom plugins in any language. Administrators can configure alerts when plugin data exceeds defined limits, using command-line tools or systems such as Nagios and Icinga. SNMP plugins can collect data from remote machines, and TLS can encrypt communication between master and nodes, with optional certificate checks against a shared authority. Packaged installs use munin-node on monitored nodes and munin on the master; the project recommends packages over source installs. The homepage lists version 2.0.69 as the latest stable release.
Good
- Free and open source.
- More than 500 available plugins.
- Custom plugins can be written in any language.
- TLS support for master-node communication.
Watch out
- Homepage lists version 2.0.69 as latest stable.
- Commercial private support and training are no longer offered by the named lead developer.
Who it suits
Munin suits administrators who want self-hosted monitoring across computers, networks, applications, or other listed resources. Its plugin options and alert integrations may fit setups that need custom metrics or threshold alerts.
Verdict
Munin combines graph-based monitoring with a broad plugin approach and configurable alerts. It is a self-hosted option, with package-based installation recommended by the project.
Plans and prices
From Munin's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Munin | Free | open-source monitoring software · packages, tarballs or source |
The facts
Each one read from Munin's own pages, with the date it was checked.
What it does
- Alerts
- Munin can alert administrators when plugin data breaches defined limits, using command line tools or systems such as Nagios or Icinga.checked 11 Oct 2026
- Architecture
- Munin uses a master and node architecture in which the master regularly connects to nodes to collect metrics.checked 11 Oct 2026
- Commercial support
- The commercial offerings page says private support and training are no longer provided by the named lead developer for the foreseeable future.checked 11 Oct 2026
- Graphs
- Munin presents monitored information as graphs through a web interface and stores data in RRD files.checked 11 Oct 2026
- Install requirements
- A packaged installation uses the munin-node package on each monitored node and the munin package on the master; the maker recommends packages over source installs.checked 11 Oct 2026
- Integrations
- The maker documents alert integrations with Nagios and Icinga and supports SNMP plugins for collecting data from remote machines.checked 11 Oct 2026
- Monitoring scope
- Munin can monitor computers, networks, SANs, applications and weather measurements.checked 11 Oct 2026
- Plugins
- The site says Munin has more than 500 available plugins and lets users write custom plugins in any language.checked 11 Oct 2026
- Polling
- The maker says Munin polls servers once every five minutes.checked 11 Oct 2026
- Purpose
- Munin is a networked resource monitoring tool for analyzing resource trends and performance problems.checked 11 Oct 2026
- Release information
- The homepage lists version 2.0.69 as the latest stable release, posted November 22, 2021.checked 11 Oct 2026
- Scale
- The maker describes deployments from a home Raspberry Pi to clusters with more than 100 nodes.checked 11 Oct 2026
- Security
- Munin supports TLS for encrypted communication between master and nodes, with an option to verify certificates against a shared certificate authority.checked 11 Oct 2026
- Support
- The project points users to its FAQ, guide, OFTC IRC channel, mailing list archive and GitHub issues.checked 11 Oct 2026
The company
- Founded
- 2002checked 28 Sep 2026
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