Version actuelle datée du 22 mars 2009 à 14:14

Introduction

Article "bloc-note" sur l'installation de Nagios 3.0.6 sur Corni.peaudeau.fr.

But du Nagios: surveillance des services sur r14493.ovh.net, a.k.a rps.pedrono.fr.

Installation

Guide d'installation

Installation Nagios 3.x - Ubuntu quickstart

Téléchargement de Nagios

jules@corni:/home/jules/$ wget http://switch.dl.sourceforge.net/sourceforge/nagios/nagios-3.0.6.tar.gz
jules@corni:/home/jules/$ tar xvzf nagios-3.0.6.tar.gz
jules@corni:/home/jules/$ wget http://puzzle.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.13.tar.gz
jules@corni:/home/jules/$ tar xvzf nagios-plugins-1.4.13.tar.gz

Vérification des prérequis

jules@corni:/home/jules/nagios-3.0.6$ dpkg -l|grep gcc
jules@corni:/home/jules/nagios-3.0.6$ dpkg -l|grep build
jules@corni:/home/jules/nagios-3.0.6$ sudo apt-get update
jules@corni:/home/jules/nagios-3.0.6$ sudo apt-get install build-essential
jules@corni:/home/jules/nagios-3.0.6$ sudo apt-cache search gd2
jules@corni:/home/jules/nagios-3.0.6$ sudo apt-get install libgd2-xpm-dev

Gestion des droits utilisateurs

jules@corni:/home/jules/nagios-3.0.6$ sudo useradd -m nagios
jules@corni:/home/jules/nagios-3.0.6$ sudo passwd nagios
Enter new UNIX password: 
Retype new UNIX password: 
passwd: password updated successfully
jules@corni:/home/jules/nagios-3.0.6$ 
jules@corni:/home/jules/nagios-3.0.6$ sudo usermod -G nagios nagios
jules@corni:/home/jules/nagios-3.0.6$ sudo groupadd nagcmd
jules@corni:/home/jules/nagios-3.0.6$ sudo usermod -a -G nagcmd nagios
jules@corni:/home/jules/nagios-3.0.6$ sudo usermod -a -G nagcmd www-data

Compilation de Nagios

jules@corni:/home/jules/nagios-3.0.6$ sudo ./configure --with-command-group=nagcmd
...
*** Configuration summary for nagios 3.0.6 12-01-2008 ***:

 General Options:
 -------------------------
        Nagios executable:  nagios
        Nagios user/group:  nagios,nagios
       Command user/group:  nagios,nagcmd
            Embedded Perl:  no
             Event Broker:  yes
        Install ${prefix}:  /usr/local/nagios
                Lock file:  ${prefix}/var/nagios.lock
   Check result directory:  ${prefix}/var/spool/checkresults
           Init directory:  /etc/init.d
  Apache conf.d directory:  /etc/apache2/conf.d
             Mail program:  /bin/mail
                  Host OS:  linux-gnu

 Web Interface Options:
 ------------------------
                 HTML URL:  http://localhost/nagios/
                  CGI URL:  http://localhost/nagios/cgi-bin/
 Traceroute (used by WAP):  
Review the options above for accuracy.  If they look okay,
type 'make all' to compile the main program and CGIs.

jules@corni:/home/jules/nagios-3.0.6$ sudo make all
...
jules@corni:/home/jules/nagios-3.0.6$ sudo make install
...
jules@corni:/home/jules/nagios-3.0.6$ sudo make install-init
...
jules@corni:/home/jules/nagios-3.0.6$ sudo make install-config
...
jules@corni:/home/jules/nagios-3.0.6$ sudo make install-commandmode
...

Compilation et installation des nagios-plugins

jules@corni:/home/jules/nagios-3.0.6$ cd ../nagios-plugins-1.4.13/
jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo ./configure --with-nagios-user=nagios --with-nagios-group=nagios
...
jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo make
...
jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo make install
...

Configuration de Nagios

Contacts et ContactGroups

jules@corni:/home/jules/nagios-3.0.6$ sudo vi /usr/local/nagios/etc/objects/contacts.cfg 
...
define contact{
        contact_name                    nagiosadmin    
        use                             generic-contact
        alias                           Nagios Admin   
        email                           jules@pedrono.fr        
        }

define contact{
        contact_name                    denis           
        use                             generic-contact 
        alias                           Denis Peaudeau
        email                           denispeaudeau@gmail.com
        }
...
define contactgroup{
        contactgroup_name       admins
        alias                   Nagios Administrators
        members                 nagiosadmin,denis
        }

Installation configuration Apache

jules@corni:/home/jules/nagios-3.0.6$ sudo make install-webconf
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/apache2/conf.d/nagios.conf

*** Nagios/Apache conf file installed ***

jules@corni:/home/jules/nagios-3.0.6$ sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
New password: 
Re-type new password: 
Adding password for user nagiosadmin
jules@corni:/home/jules/nagios-3.0.6$ sudo htpasswd /usr/local/nagios/etc/htpasswd.users denis
New password: 
Re-type new password: 
Adding password for user denis
jules@corni:/home/jules/nagios-3.0.6$ 
jules@corni:/home/jules/nagios-3.0.6$ sudo /etc/init.d/apache2 reload
 * Reloading web server config apache2
apache2: Could not reliably determine the server's fully qualified domain name, using 192.168.0.30 for ServerName
                                                                                                                                                                                                         [ OK ]
jules@corni:/home/jules/nagios-3.0.6$

Sécurisation des accès

A FAIRE Sécuriser les accès CGI

Lancement de Nagios

Création des liens symbolique pour l'init du système

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo ln -s /etc/init.d/nagios /etc/rcS.d/S99nagios

Vérification de la configuration de Nagios

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Nagios 3.0.6
Copyright (c) 1999-2008 Ethan Galstad (http://www.nagios.org)
Last Modified: 12-01-2008
License: GPL

Reading configuration data...

Running pre-flight check on configuration data...

Checking services...
	Checked 8 services.
Checking hosts...
	Checked 1 hosts.
Checking host groups...
	Checked 1 host groups.
Checking service groups...
	Checked 0 service groups.
Checking contacts...
	Checked 2 contacts.
Checking contact groups...
	Checked 1 contact groups.
Checking service escalations...
	Checked 0 service escalations.
Checking service dependencies...
	Checked 0 service dependencies.
Checking host escalations...
	Checked 0 host escalations.
Checking host dependencies...
	Checked 0 host dependencies.
Checking commands...
	Checked 24 commands.
Checking time periods...
	Checked 5 time periods.
Checking for circular paths between hosts...
Checking for circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors:   0

Things look okay - No serious problems were detected during the pre-flight check
jules@corni:/home/jules/nagios-plugins-1.4.13$

Lancement de Nagios

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo /etc/init.d/nagios start
Starting nagios: done.
jules@corni:/home/jules/nagios-plugins-1.4.13$ ps fax
...
10688 ?        Ssl    0:00 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

Accès au service

Nagios sur Corni

Configuration des notifications

Installation de postfix

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo apt-get install postfix
...

Postfix configuré comme "Système satellite".
Nom de courrier pour le from: nagios@home.peaudeau.fr
Relay: smtp.free.fr
ATTENTION A LA FREQUENCE ET AUX ETATS DECLENCHEURS DES NOTIFICATIONS

Installation de mailutils

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo apt-get install mailutils
...
jules@corni:/home/jules/nagios-plugins-1.4.13$ ma
mail                         mailx                        make-memtest86+-boot-floppy  make-ssl-cert                mandb                        mawk                         
mailq                        make                         make_method                  man                          manpath                      
jules@corni:/home/jules/nagios-plugins-1.4.13$ which mail
/usr/bin/mail

Modification du fichier de commandes Nagios

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo vi /usr/local/nagios/etc/objects/commands.cfg

Substitution sed des référence à /bin/mail:

:%s/\/bin\/mail/\/usr\/bin\/mail/gc

Les nouvelles commandes:

# notify-host-by-email command definition
define command{
        command_name    notify-host-by-email
        command_line    /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
        }

# notify-service-by-email command definition
define command{
        command_name    notify-service-by-email
        command_line    /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /usr/bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$
        }

Prise en compte de la configuration:

jules@corni:/home/jules/nagios-plugins-1.4.13$ sudo /etc/init.d/nagios restart
Running configuration check...done.
Stopping nagios: .done.
Starting nagios: done.
jules@corni:/home/jules/nagios-plugins-1.4.13$

Pour la suite...

MONITORING - Installation de NRPE sur le RPS

MONITORING - Configuration du monitoring RPS

MONITORING - Installation Nagios 3.0.6 sur Corni : Différence entre versions

Version actuelle datée du 22 mars 2009 à 14:14

Sommaire

Introduction

Installation

Guide d'installation

Téléchargement de Nagios

Vérification des prérequis

Gestion des droits utilisateurs

Compilation de Nagios

Compilation et installation des nagios-plugins

Configuration de Nagios

Contacts et ContactGroups

Installation configuration Apache

Sécurisation des accès

Lancement de Nagios

Création des liens symbolique pour l'init du système

Vérification de la configuration de Nagios

Lancement de Nagios

Accès au service

Configuration des notifications

Installation de postfix

Installation de mailutils

Modification du fichier de commandes Nagios

Pour la suite...

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