Monitoraggio di sistemi Windows con Nagios
Configurazione dell'agente sulla macchina Windows da monitorare:
- Da prompt di DOS (su suppone Cygwin installato con wget e unzip)
- Scaricare il client Windows ed installarlo:
cd %TEMP% wget http://files.nakednuns.org/x-0.3.x/NSClient%2B%2B-Win32-0.3.2.zip mkdir %SYSTEMDRIVE%\NSClient++ unzip NSClient++-Win32-0.3.2.zip -d %SYSTEMDRIVE%\NSClient++ DEL NSClient++-Win32-0.3.2.zip
cd %SYSTEMDRIVE%\NSClient++ nsclient++ /install
- Open the services manager and make sure the NSClientpp service is allowed to interact with the desktop (see the 'Log On' tab of the services manager). If it isn't already allowed to interact with the desktop, check the box to allow it to.
- Edit the NSC.INI file (located in the C:\NSClient++ directory) and make the following changes:
- Uncomment all the modules listed in the [modules] section, except for CheckWMI.dll and RemoteConfiguration.dll
- Optionally require a password for clients by changing the 'password' option in the [Settings] section.
- In the [Settings] section, uncomment the 'allowed_hosts' option. Add the IP address of the Nagios server to this line, or leave it blank to allow all hosts to connect.
- In the [NSClient] section, make sure the 'port' option is uncommented and set to '12489' (the default port).
- Avviare l'agente in test
nsclient++.exe /test
Se non ci sono messaggi di errore, digitare
exit
- Avviare l'agente
nsclient++.exe /start
Si deve vedere l'icona nella Systray
Configurazione dell'agente monitorante Linux
SI suppone di voler monitorare il tutto da una macchina linux, la quale è interrgata poi via NRPE da un server centrale Nagios.
- Verificare che si stata completata la configurazione dei NRPE
HOSTTOCHECK=192.168.1.100
- Testare il ping
/usr/lib/nagios/plugins/check_fping $HOSTTOCHECK FPING OK - $HOSTTOCHECK (loss=0%, rta=0.380000 ms)|loss=0%;;;0;100 rta=0.000380s;;;0.000000
- Testare che NSClient++ sia accessibile da questa macchina Linux:
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -v CLIENTVERSION -p 12489 NSClient++ 0.3.2.9 2008-05-17
Testare anche i comandi che si vorranno monitorare:
- Per verificare che l'agente sia attivo:
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -v CLIENTVERSION -p 12489 NSClient++ 0.3.2.9 2008-05-17
- Per l'Uptime
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -v UPTIME -p 12489 System Uptime - 85 day(s) 16 hour(s) 34 minute(s)
- Per il CPU Load
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -p 12489 -v CPULOAD -l 5,80,90 CPU Load 14% (5 min average) | '5 min avg Load'=14%;80;90;0;100
- Per l'utilizzo di memoria
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -p 12489 -v MEMUSE -w 80 -c 90 Memory usage: total:1255.98 Mb - used: 651.92 Mb (52%) - free: 604.06 Mb (48%) | 'Memory usage'=651.92Mb;1004.78;1130.38;0.00;1255.98
- Per lo spazio sul disco C:
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -p 12489 -v USEDDISKSPACE -l c -w 80 -c 90 c:\ - total: 4.88 Gb - used: 4.48 Gb (92%) - free 0.40 Gb (8%) | 'c:\ Used Space'=4.48Gb;3.90;4.39;0.00;4.88
- Per lo spazio sul disco D:
/usr/lib/nagios/plugins/check_nt -H $HOSTTOCHECK -p 12489 -v USEDDISKSPACE -l d -w 80 -c 90 d:\ - total: 29.00 Gb - used: 22.10 Gb (76%) - free 6.90 Gb (24%) | 'd:\ Used Space'=22.10Gb;23.20;26.10;0.00;29.00
- Se tutto è corretto, aggiungere i comandi in nrpe_local.cfg
sudoedit /etc/nagios/nrpe_local.cfg command[check-manserver-ping]=/usr/lib/nagios/plugins/check_fping 192.168.1.100 command[check-manserver-nsclient]=/usr/lib/nagios/plugins/check_nt -H 192.168.1.100 -p 12489 -v CLIENTVERSION command[check-manserver-uptime]=/usr/lib/nagios/plugins/check_nt -H 192.168.1.100 -p 12489 -v UPTIME p 12489 command[check-manserver-cpuload]=/usr/lib/nagios/plugins/check_nt -H 192.168.1.100 -p 12489 -v CPULOAD -l 5,80,90 command[check-manserver-memuse]=/usr/lib/nagios/plugins/check_nt -H 192.168.1.100 -p 12489 -v MEMUSE -w 80 -c 90 command[check-manserver-disk-c]=/usr/lib/nagios/plugins/check_nt -H 192.168.1.100 -p 12489 -v USEDDISKSPACE -l c -w 80 -c 90 command[check-manserver-disk-d]=/usr/lib/nagios/plugins/check_nt -H 192.168.1.100 -p 12489 -v USEDDISKSPACE -l d -w 80 -c 90
- Riavviare nrpe
sudo /etc/init.d/nagios-nrpe-server restart
Configurazione del Server Nagios
- Testare se nrpe riesce ad colloquiare con l'host linux monitorante:
/usr/lib/nagios/plugins/check_nrpe -H man.rvmgroup.it -c check-manserver-ping FPING OK - 192.168.1.100 (loss=0%, rta=0.380000 ms)|loss=0%;;;0;100 rta=0.000380s;;;0.000000
- Definire l'host: dato che l'host Windows da monitorare non è raggiungibile, si deve definire l'host con un comando di monitoraggio fittizio che dia sempre host up, e dargli l'IP pubblico raggiungibile della macchina linux monitorante:
- Definire il comando di host checking:
sudoedit /etc/nagios/misccommands.cfg
define command{
command_name check-host-dummy-up
command_line $USER1$/check_dummy 0 -H $HOSTADDRESS$
}
- Definire quindi l'host:
sudoedit /etc/nagios/hosts.cfg
define host{
use generic-host
host_name manserver.mannesmann.priv
alias Mannesmann Server
address man.rvmgroup.it
check_command check-host-dummy-up
}
Assegnare l'host ad un nuovo gruppo:
sudoedit /etc/nagios/hostgroups.cfg
define hostgroup{
hostgroup_name Mannesmann
alias Thyssenkrupp Mannex
contact_groups nagios-admins
members manserver.mannesmann.priv
}
Definire i servizi da monitorare:
sudoedit /etc/nagios/services.cfg
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description PING
check_command check-nrpe!check-manserver-ping
}
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description NSCLIENT
check_command check-nrpe!check-manserver-nsclient
}
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description UPTIME
check_command check-nrpe!check-manserver-uptime
}
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description CPULOAD
check_command check-nrpe!check-manserver-ping
}
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description MEMUSE
check_command check-nrpe!check-manserver-memuse
}
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description DISK-C
check_command check-nrpe!check-manserver-disk-c
}
define service{
use generic-service
host_name manserver.mannesmann.priv
service_description DISK-D
check_command check-nrpe!check-manserver-disk-d
}
- Testare la configurazione e riavviare:
sudo nagios -v /etc/nagios/nagios.cfg sudo /etc/init.d/nagios restart