Outils personnels

Monit installation

De wikiGite

Sur Debian

  1. Installation

apt-get install monit

Dans /etc/monit/monitrc, décommenter : 

set daemon  120 #*** NOTE POUR DEBIAN : c'est le paramètre de /etc/default/monit CHECK_INTERVAL qui est prioritaire
(lancement du démon avec "-d" dans l'init.d), c'est lui qu'il faut donc modifier !
set logfile syslog facility log_daemon
set mailserver   localhost             # primary mailserver

Modifier le format du mail : 

set mail-format {

From: monit-<*** nom du serveur ****>@systea.net Subject: $EVENT $SERVICE Message: $DATE $SERVICE : $EVENT $DESCRIPTION Monit $ACTION : $SERVICE 

}

Donner le destinataire : 

set alert fsoyer@systea.net                       # receive all alerts

Eventuellement, ouvrir le "embedded webserver" au localhost pour au moins pouvoir lancer un "monit status" ou "monit summary" (voir plus bas pour redirection php si APACHE installé): 

set httpd port 2812 and
    use address localhost  # only accept connection from localhost
    allow localhost        # allow localhost to connect to the server and

Note S'il ny a pas d'Apache, ouvrir le port 2812 et configurer monit en SSL autonome : 

set httpd port 2812 and
   SSL Enable 
   PEMFILE /etc/apache2/ssl/apache.pem
   allow admin:'cela2M!'      # require user 'admin' with password

Note2 L'ouverture du port 2812 peut être un trou de sécurité. Ne l'ouvrir qu'en connaissance de cause.

Vérifier que : 

include /etc/monit/monit.d/*

est décommenté (ajouter le "monit" au milieu).

Créer le répertoire au besoin.

Sur CentOS / RedHat

Récupérer la dernière version de paquet sur dag.wieers.com (CentOS4 = RHEL4) 

# wget http://dag.wieers.com/rpm/packages/monit/monit-4.9-2.el4.rf.i386.rpm

Installer : 

# rpm -i monit-4.9-2.el4.rf.i386.rpm

Attention le fichier de conf est /etc/monit.conf


Configuration des services

Exemple de fichier de config /etc/monit/monit.d/isp129.systea.net, type DEBIAN, surveillance locale : 

###############################################################################
## Isp129.systea.net local
###############################################################################
#
check system isp129.systea.net
    if loadavg (1min) > 6 then alert
    if loadavg (5min) > 4 then exec "/root/bin/top.sh"
    if memory usage > 85% then exec "/root/bin/top.sh"
    if cpu usage (user) > 70% then exec "/root/bin/top.sh"
    if cpu usage (system) > 50% then exec "/root/bin/top.sh"
    if cpu usage (wait) > 60% then exec "/root/bin/top.sh"
check process apache2 with pidfile /var/run/apache2.pid
    start program = "/etc/init.d/apache2 start"
    stop program  = "/etc/init.d/apache2 stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 80 then restart
check process proftpd1 with pidfile /var/run/proftpd.pid
    start program = "/etc/init.d/proftpd start"
    stop program  = "/etc/init.d/proftpd stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 21 then restart
check process postfix2 with pidfile /var/spool/postfix/pid/master.pid
    start program = "/etc/init.d/postfix start"
    stop program  = "/etc/init.d//postfix stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 25 then restart
check process mysql5 with pidfile /var/run/mysqld/mysqld.pid
    start program = "/etc/init.d/mysql start"
    stop program  = "/etc/init.d/mysql stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 3306 then restart
check process postgresql7 with pidfile /var/lib/postgresql/7.4/main/postmaster.pid
    start program = "/etc/init.d/postgresql-7.4 start"
    stop program  = "/etc/init.d/postgresql-7.4 stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 5432 then restart
check device root with path /dev/sda1
    if space usage > 75% for 5 times within 15 cycles then alert
    if space usage > 90% then alert

Exemple de fichier de config /etc/monit/monit.d/dpixnet.ephoto.fr, type CENTOS, surveillance locale : 

###############################################################################
## dpixnet.ephoto.fr local
###############################################################################
#
check system dpixnet.ephoto.fr
    if loadavg (1min) > 6 then alert
    if loadavg (5min) > 4 then exec "/opt/systools/top.sh"
    if memory usage > 85% then exec "/opt/systools/top.sh"
    if cpu usage (user) > 70% then exec "/opt/systools/top.sh"
    if cpu usage (system) > 50% then exec "/opt/systools/top.sh"
    if cpu usage (wait) > 60% then exec "/opt/systools/top.sh"
check process httpd with pidfile /var/run/httpd.pid
    start program = "/etc/init.d/httpd start"
    stop program  = "/etc/init.d/httpd stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 80 then restart
check process sendmail with pidfile /var/run/sendmail.pid
    start program = "/etc/init.d/sendmail start"
    stop program  = "/etc/init.d/sendmail stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 25 then restart
check process mysql5 with pidfile /var/run/mysqld/mysqld.pid
    start program = "/etc/init.d/mysqld start"
    stop program  = "/etc/init.d/mysqld stop"
    if cpu > 60% for 2 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if failed port 3306 then restart
check device root with path /dev/mapper/VolGroup00-LogVol00
    if space usage > 75% for 5 times within 15 cycles then alert
    if space usage > 90% then alert
check device home with path /dev/mapper/VolGroup00-LogVol04
    if space usage > 75% for 5 times within 15 cycles then alert
    if space usage > 90% then alert

Fichier top.sh : 

#!/bin/bash
LOG=/root/top.log
top -d 5 -b -n 5 > $LOG
cat $LOG | mail -s "top.log isp129" fsoyer@systea.net

Exemple de /etc/monit/monit.d/isp129.systea.net sur atuin qui surveille isp129 en remote : 

###############################################################################
## Isp129.systea.net remote
###############################################################################
#
check host isp129.systea.net with address 80.64.226.29
       if failed icmp type echo count 3 with timeout 10 seconds then alert

Accès au webserver de l'extérieur sans ouvrir de port supplémentaire

Apache doit être opérationnel sur la machine

Créer /var/www/monit, y copier /home/fsoyer/Documents/Documents divers - logiciels/monit/monit.php en index.php.

Créer /etc/apache2/conf.d/monit.conf : 

<IfModule mod_alias.c>
  Alias /monit "/var/www/monit"
</IfModule>

<DirectoryMatch /var/www/monit/>
  Options -FollowSymLinks
  AllowOverride All
  order deny,allow
#  deny from all
#  allow from 127.0.0.0/255.0.0.0
</DirectoryMatch>

Créer /var/www/.htaccess : 

AuthUserFile /var/www/monit/.htpasswd
 AuthName "Restricted Access"
 Require valid-user
 AuthType Basic

<Files .*>
deny from all
</Files>

Et créer le fichier de mots de passe avec user admin/cela2M! : 

# htpasswd -c /var/www/monit/.htpasswd admin
Récupérée de « https://wiki.kogite.fr/index.php?title=Monit_installation&oldid=1858 »