Muninwrt - a Munin node for small Linux systems

Last Modified: Thursday 30 April 2026, 13:32

Munin is a networked resource monitoring tool that helps analyze resource trends.

Although Munin is an older tool, it can outperform Prometheus/AlertManager/Grafana on small systems, thanks to its lightweight design and use of an RRD-based fixed-size database.

Muninwrt is a Munin node implemented in perl, similar to pmmn, with all plugins located in /etc/munin/plugins.

It works on small Linux systems: OpenWRT, RUTX, Tiny Core Linux, piCore and so on, and even Debian 🥳.

As of version 1.0.0, Muninwrt no longer depends on xinetd.

Just add this to your munin.conf:

[chez.wam;sb-bose]
  address ssh://tc@sb-bose -t /etc/munin/munin-pmmn
  use_node_name yes

You must have ssh installed and a properly configured authorized_keys.

Building

get the sdk, untar it, then cd to it

./scripts/feeds update -a
make tools/install
make toolchain/install

cd feeds/packages/utils
git clone https://github.com/czodroid/muninwrt
cd ../../..
./scripts/feeds update -a
./scripts/feeds install muninwrt
make menuconfig

Then in Utilities ---> select muninwrt <*> muninwrt

make package/muninwrt/compile
make package/index

opkg .ipk is a file like bin/packages/arm_cortex-a7_neon-vfpv4/packages/muninwrt_1.0.1-1_all.ipk

Install by Releases

You can get the release here: https://github.com/czodroid/muninwrt/releases

Then copy this file to your router and install it:

opkg install /tmp/muninwrt_1.0.1-1_all.ipk

Install by hand

On OpenWRT, you will need to install perl and possibly the perlbase-getopt and perlbase-file packages for the plugins.

You must also run /etc/munin/share/munin-node-configure to configure all interfaces, systemd and thermal acpi if your operating system allows it (which is done when you install a release).

Source code

https://github.com/czodroid/muninwrt

License

License: GPL-2.0 (http://www.gnu.org/copyleft)

Copyright: (C) 2014-2026 Olivier Sirol czo@free.fr