SerwerWeb.pl

The following guide describes how to install the Munin monitoring software from a Debian system 10.
Thanks to it, we will be able to monitor our server and its many parameters.

We start the terminal and update the repositories and the system:

apt update
apt upgrade

We install a web server so that we can get to the graphic part of the interface through the website:

apt install apache2 libcgi-fast-perl libapache2-mod-fcgid

We run the apache modules:

a2enmod fcgid

We install Munin:

apt install munin munin-node munin-plugins-extra

We go to the directory with plugins and run some of the necessary ones:

cd /etc/munin/plugins

ln -s /usr/share/munin/plugins/mysql_ mysql_
ln -s /usr/share/munin/plugins/mysql_bytes mysql_bytes
ln -s /usr/share/munin/plugins/mysql_innodb mysql_innodb
ln -s /usr/share/munin/plugins/mysql_isam_space_ mysql_isam_space_
ln -s /usr/share/munin/plugins/mysql_queries mysql_queries
ln -s /usr/share/munin/plugins/mysql_slowqueries mysql_slowqueries
ln -s /usr/share/munin/plugins/mysql_threads mysql_threads

The next step is to edit the Munin configuration file.

edit file:

nano /etc/munin/munin.conf

And we configure it as follows:

# Example configuration file for Munin, generated by 'make build'

# The next three variables specifies where the location of the RRD
# databases, the HTML output, logs and the lock/pid files. They all
# must be writable by the user running munin-cron. They are all
# defaulted to the values you see here.
#
dbdir /var/lib/munin
htmldir /var/cache/munin/www
logdir /var/log/munin
rundir /var/run/munin

# Where to look for the HTML templates
#
tmpldir /etc/munin/templates

# Where to look for the static www files
#
#staticdir /etc/munin/static

# temporary cgi files are here. note that it has to be writable by
# the cgi user (usually nobody or httpd).
#
# cgitmpdir / var / lib / munin / cgi-tmp

# (Exactly one) directory to include all files from.
includedir /etc/munin/munin-conf.d
[...]
# a simple host tree
[server1.example.com]
 address 127.0.0.1
 use_node_name yes
[...]

Now we create vhost munina

cd /etc/apache2/conf-enabled/

ln -s /etc/munin/apache24.conf munin.conf

service apache2 restart

edit file:

nano /etc/munin/apache24.conf

It should look like this:

Alias ​​/ munin / var / cache / munin / www

 # Require local
 Require all granted
 Options FollowSymLinks SymLinksIfOwnerMatch


ScriptAlias /munin-cgi/munin-cgi-graph /usr/lib/munin/cgi/munin-cgi-graph

 # Require local
 Require all granted
 Options FollowSymLinks SymLinksIfOwnerMatch
 
 SetHandler fcgid-script
 
 
 SetHandler cgi-script
 

We are restarting Apache and Munin to reload the changes:

systemctl restart apache2.service

systemctl restart munin-node.service

That's practically it, after going to :

our address // munin / we should see the monitoring statistics page.