Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:install_munin_sur_redhat_centos [2025/11/09 19:16] – Jean-Baptiste
+++ tech:install_munin_sur_redhat_centos [2026/06/07 19:12] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>Brouillon}}
+# Install de Munin sur RedHat /CentOS
+Source : http://tecadmin.net/installing-munin-in-centos-rhel-and-fedora/
+Install
+~~~bash
+yum install epel-release
+yum --enablerepo=epel install munin munin-node rrdtool
+~~~
+Changement binding sur localhost (inutile d'écouter sur les cartes réseaux, car on communique en localhost)
+~~~bash
+sed -i -e 's/^host \*/host 127.0.0.1/' /etc/munin/munin-node.conf
+~~~
+Création MDP
+~~~bash
+htpasswd -cm /etc/munin/munin-htpasswd muninadmin
+~~~
+Nous ajoutons dans le fichier /etc/httpd/conf.d/munin.conf la ligne suivante :
+`/etc/httpd/conf.d/munin.conf`
+~~~apache
+Alias /munin /var/www/html/munin
+~~~
+Sur ma conf j'ai dû aussi ajouter un `DirectoryIndex index.html`
+Normalement ça devrait ressembler à :
+`/etc/httpd/conf.d/munin.conf`
+~~~apache
+# This file can be used as a .htaccess file, or a part of your apache
+# config file.
+#
+# For the .htaccess file option to work the munin www directory
+# (/var/www/html/munin) must have "AllowOverride all" or something close
+# to that set.
+#
+# As a config file enclose it in <directory> like so:
+#
+<directory /var/www/html/munin>
+AuthUserFile /etc/munin/munin-htpasswd
+AuthName "Munin"
+AuthType Basic
+require valid-user
+# This next part requires mod_expires to be enabled.
+#
+# We could use <IfModule mod_expires> around here, but I want it to be
+# as evident as possible that you either have to load mod_expires _or_
+# you coment out/remove these lines.
+# Set the default expiery time for files 5 minutes 10 seconds from
+# their creation (modification) time.  There are probably new files by
+# that time.
+ExpiresActive On
+ExpiresDefault M310
+# Ajout
+DirectoryIndex index.html
+</directory>
+ScriptAlias /munin-cgi/munin-cgi-graph /var/www/cgi-bin/munin-cgi-graph
+<Location /munin-cgi/munin-cgi-graph>
+  AuthUserFile /etc/munin/munin-htpasswd
+  AuthName "Munin"
+  AuthType Basic
+  require valid-user
+</Location>
+# Ajout
+Alias /munin /var/www/html/munin
+~~~
+~~~bash
+systemctl enable munin-node
+systemctl start munin-node
+~~~
+En vérifie que la conf est ok
+~~~bash
+apachectl -t
+~~~
+Si ok
+~~~bash
+systemctl reload httpd
+~~~
+NB, les graphes sont générés grâce à la cron `/etc/cron.d/munin`
+## Notes brouillon
+CentOS6
+### MySQL
+~~~bash
+ln -s /usr/share/munin/plugins/mysql_* /etc/munin/plugins/
+service munin-node restart
+~~~
+`/etc/munin/plugin-conf.d/munin-node`
+~~~
+[diskstats]
+user munin
+[iostat_ios]
+user munin
+[mysql*]
+user root
+env.mysqlopts --defaults-extra-file=/var/lib/munin/.my.cnf
+~~~
+`/var/lib/munin/.my.cnf`
+~~~ini
+[mysqldump]
+user=root
+password=P@ssw0rd
+[mysql]
+user=root
+password=P@ssw0rd
+[mysqladmin]
+user=root
+password=P@ssw0rd
+[mysqlshow]
+user=root
+password=P@ssw0rd
+~~~
+~~~bash
+chown munin:munin /var/lib/munin/.my.cnf
+chmod 600 /var/lib/munin/.my.cnf
+service munin-node restart
+~~~
+### Apache
+`/etc/httpd/conf/httpd.conf`
+~~~apache
+LoadModule status_module modules/mod_status.so
+ExtendedStatus On
+<Location /server-status>
+    SetHandler server-status
+    Order deny,allow
+    Deny from all
+    Allow from 127.0.0.1 ::1
+</Location>
+~~~
+~~~bash
+service httpd restart
+~~~
+~~~bash
+ln -s /usr/share/munin/plugins/apache_* /etc/munin/plugins/
+service munin-node restart
+~~~
+## Pb MySQL bug : mysql innodb free tablespace
+Voir :
+* https://forums.cpanel.net/threads/munin-plugin-warn-mysql-innodb-free-tablespace.208591/
+Test
+~~~bash
+su - munin -s /bin/bash
+cd /etc/munin/plugins
+./mysql_innodb
+~~~
+Erreur
+~~~
+./mysql_innodb: Error: No visible tables use InnoDB
+free.value U
+~~~
+Désactiver la sonde
+~~~bash
+unlink /etc/munin/plugins/mysql_innodb
+service munin-node restart
+~~~