Install munin first:
yum install epel-release -y
yum install munin munin-cgi munin-node munin-apache munin-common munin-plugins-ruby -y
Check the services that munin has installed in systemd:
systemctl list-unit-files | grep -i munin
Enable all available munin plugins:
munin-node-configure --shell --families=contrib,auto | sh -x
Start and enable munin-node which collects data on the system, we restrict this service to localhost:
sed -i /etc/munin/munin-node.conf -e "s,^host \*,#host \*,g"
sed -i /etc/munin/munin-node.conf -e "s,^#host 127.0.0.1,host 127.0.0.1,g"
systemctl enable munin-node --now
Enable munin in systemd timer:
sed -i /etc/munin/munin.conf -e "s,#graph_strategy cron,graph_strategy cron,g"
sed -i /etc/munin/munin.conf -e "s,#html_strategy cron,html_strategy cron,g"
sed -i /etc/munin/munin.conf -e "s,#htmldir,htmldir,g"
systemctl enable munin.timer --now
check if munin timer is running properly
systemctl list-timers --all
and finally add a virtualhost to apache or nginx to show the graphs. Check the examples here (Periodically generate graphs and HTML pages).
For apache:
<VirtualHost _IP_:80>
ServerName _IP_
DocumentRoot /var/www/html
Alias /munin/static/ /etc/munin/static/
<Directory /etc/munin/static>
Require all granted
</Directory>
# Disabling caching
RewriteEngine On
<FilesMatch "\.(html|htm|jpg|png)$">
FileETag None
<IfModule mod_headers.c>
Header unset ETag
Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
Header set Pragma "no-cache"
Header set Expires "Wed, 12 Jan 1980 05:00:00 GMT"
</IfModule>
</FilesMatch>
# Password protect the folder
<Directory /var/www/html>
AuthType Basic
AuthName "restricted area"
AuthUserFile /var/www/.htpasswd
require valid-user
</Directory>
ScriptAlias /munin-cgi/munin-cgi-graph /var/www/html/munin/cgi/munin-cgi-graph
# ScriptAlias /munin /var/www/html/munin/cgi/munin-cgi-html
<Directory /var/www/html/munin/cgi>
Require valid-user
AuthName "restricted area"
AuthUserFile /var/www/.htpasswd
<IfModule mod_fcgid.c>
SetHandler fcgid-script
</IfModule>
<IfModule !mod_fcgid.c>
SetHandler cgi-script
</IfModule>
</Directory>
CustomLog /var/log/httpd/munin-access.log combined
ErrorLog /var/log/httpd/munin-error.log
</VirtualHost>
Create your .htpasswd file :
htpasswd -c /var/www/.htpasswd monit
and reload apache.
for nginx add the following to your monit vhost:
location = / {
rewrite ^/$ munin/ redirect; break;
}
location /munin/static/ {
alias /etc/munin/static/;
expires modified +1w;
}
location /munin/ {
auth_basic "Restricted";
auth_basic_user_file /var/www/.htpasswd;
alias /var/www/html/munin/;
expires modified +310s;
}
location ^~ /munin-cgi/munin-cgi-graph/ {
auth_basic "Restricted";
auth_basic_user_file /var/www/.htpasswd;
access_log off;
fastcgi_split_path_info ^(/munin-cgi/munin-cgi-graph)(.*);
fastcgi_param PATH_INFO $fastcgi_path_info;
fastcgi_pass unix:/var/run/munin/munin-cgi-graph.sock;
include fastcgi_params;
}
then run
service nginx reload
systemctl enable munin-cgi-graph.socket --now
