Install and Configure Munin in Ubuntu

October 11, 2023

Munin is a potent networked resource monitoring tool that offers insightful information about resource patterns and aids in the detection of performance problems. Munin offers a default installation that needs a little adjustment to produce detailed graphs and reports due to its plug-and-play nature. This article provides instructions for setting up Munin and using it to efficiently monitor and assess network resources.

Step 1: Installation

Installing the Munin package on both the monitoring master and the nodes you want to monitor is required before you can use Munin, For an Ubuntu/Debian-based system, adhere to these steps:

1. Install Munin on each node

sudo apt-get install munin-node

2. Install Munin on the master:

sudo apt-get install munin

Step 2: Configuration

Adding the relevant configurations to the node and master configuration files constitutes Munin configuration. the actions listed below:

1. Configure the Munin node:

Each node’s ‘/etc/munin/munin-node.conf’ file should be modified to include your master’s IP address in the access list. Edit the lines that follow:

allow ‘^127.’

allow ‘^$’

2. Restart the Munin node service:

Restart the Munin node service to apply the configuration changes:

sudo service munin-node restart

3. Configure the Munin master:

On the master server, modify the file “/etc/munin/munin.conf” and add the previously configured nodes. Add the required node names and IP addresses to the configuration. For instance:

[] address[]address[] address 2001:db8::de:caf:bad

4. Access the Munin web interface:

Once Munin has been installed, open your web browser and go to http://localhost/munin/ to access the web interface.

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Munin Components in Ubuntu:

The monitoring process is carried out by a number of parts that make up Munin. The key elements are summarized as follows:

1. Munin Master:

The following command-line applications are available on the Munin master:

– “munin-cron”: Uses cron to run other Munin programs every five minutes.

– “munin-update”: Collects information from computers running Munin-node. typically carried out by munin-cron.

-‘munin-limits’: Searches for any out-of-bounds values. usually controlled by munin-cron.

-‘munin-httpd’: Launches the Munin master web interface.

2. Munin Node:

Programs from the following categories make up the Munin node:

The demons -“munin-node”: Executes on all nodes where data is gathered.

 – “munin-asyncd”: A daemon that executes simultaneously with munin-node and queries the local munin-node before spooling the results.

Command-line programs

“munin-node-configure”: Automatically sets up plugins for the local node.

Produces plugin documentation with the -munindoc option.

 – “munin-run”: Using this command, a plugin is run in a manner akin to a munin-node.

 -‘munin-async’: A command-line program referred to as an “asynchronous proxy node” that enables munin-update to access the munin async spool without having to wait for the node to execute plugins.

Munin with Nginx Configuration in Ubuntu:

You can set up Munin to operate without a hitch if you’re using Nginx as your web server. The steps are as follows:

1. Munin Configuration:

To enable CGI-based graph rendering, remove the comment from or add the following line to ‘/etc/munin/munin.conf’ presuming the configurations below are present:

html_strategy cgi

2. FastCGI Configuration:

Start two FastCGI processes using the external “spawn-fcgi” program: one for Munin CGI graphing and one for HTML creation. According to your installation, adjust the paths:

spawn-fcgi /usr/lib/munin/cgi/munin-cgi-graph -s /var/run/munin/fastcgi-graph.sock -U www-data -u munin -g

spawn-fcgi /usr/lib/munin/cgi/munin-cgi-html -s /var/run/munin/fastcgi-html.sock -U www-data -u munin -g

Webserver Configuration:

Add the following location blocks to your Nginx configuration file to make it work with Munin.

 Nginx configuration file:

location ^~ /munin-cgi/munin-cgi-graph/ {

          fastcgi_split_path_info ^(/munin-cgi/munin-cgi-graph)(.*);

          fastcgi_param PATH_INFO $fastcgi_path_info;

          fastcgi_pass unix:/var/run/munin/FastCGI-graph.sock;

          include fastcgi_params;


location /munin/static/ {

           alias /etc/munin/static/;


location /munin/ {

 fastcgi_split_path_info ^(/munin)(.*);

 fastcgi_param PATH_INFO $fastcgi_path_info;

 fastcgi_pass unix:/var/run/munin/FastCGI-html.sock;

 include fastcgi_params;


Munin is a powerful tool for monitoring networked resources that makes it easier to collect and analyze data from several hosts. Munin’s capabilities can be used to efficiently monitor and manage your network resources if you adhere to the installation and configuration procedures described in this article.


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