[root@wallet01 ~]# useradd nagios
[root@wallet01 ~]# id nagios
uid=501(nagios) gid=502(nagios) groups=502(nagios)
[root@wallet01 ~]# tar zxvf nagios-plugins-2.2.1.tar.gz
[root@wallet01 ~]# cd nagios-plugins-2.2.1
[root@wallet01 nagios-plugins-2.2.1]# ./configure --prefix=/usr/local/nagios \
--with-cgiurl=/nagios/cgi-bin \
--with-nagios-user=nagios \
--with-nagios-group=nagios
[root@wallet01 nagios-plugins-2.2.1]# make
[root@wallet01 nagios-plugins-2.2.1]# make install
[root@wallet01 ~]# yum install -y xinetd
[root@wallet01 ~]# tar zxvf nrpe-3.2.1.tar.gz
[root@wallet01 ~]# cd nrpe-3.2.1
[root@wallet01 nrpe-3.2.1]# ./configure --prefix=/usr/local/nagios --enable-ssl
[root@wallet01 nrpe-3.2.1]# make all
[root@wallet01 nrpe-3.2.1]# make install
[root@wallet01 nrpe-3.2.1]# make install-plugin
[root@wallet01 nrpe-3.2.1]# make install-daemon
[root@wallet01 nrpe-3.2.1]# make install-config
[root@wallet01 nrpe-3.2.1]# make install-inetd
[root@wallet01 ~]# vi /etc/xinetd.d/nrpe
# default: off
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
disable = no
socket_type = stream
port = 5666
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nrpe
server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
log_on_success =
}
[root@wallet01 ~]# vi /etc/services
nrpe 5666/tcp # nagios
[root@wallet01 ~]# vi /usr/local/nagios/etc/nrpe.cfg
allowed_hosts=192.168.1.200
command[check_cpu]=/usr/local/nagios/libexec/check_cpu.sh -w 80 -c 90
command[check_memory]=/usr/local/nagios/libexec/check_memory.py -w 20 -c 10
command[check_disk]=/usr/local/nagios/libexec/check_disk.pl -w 20 -c 10
command[check_network]=/usr/local/nagios/libexec/check_bandwidth.sh -w 900 -c 950 em1
command[check_uptime]=/usr/local/nagios/libexec/check_uptime
[root@wallet01 ~]# yum install -y vnstat
[root@wallet01 ~]# cd /usr/local/nagios/libexec
[root@wallet01 libexec]# chmod a+x check_cpu.sh
[root@wallet01 libexec]# ./check_cpu.sh -w 80 -c 90
OK - CPU Usage |CPU_USER=3;;;; CPU_SYSTEM=1;;;; CPU_IDLE=96;;;; CPU_IOWAIT=0;;;; CPU_ST=0;;;;
[root@wallet01 libexec]# chmod a+x check_memory.py
[root@wallet01 libexec]# ./check_memory.py -w 20 -c 10
OK: Free memory percentage is 89% (43004 MiB)
[root@wallet01 libexec]# chmod a+x check_disk.pl
[root@wallet01 libexec]# ./check_disk.pl -w 20 -c 10
DISK OK
[root@wallet01 libexec]# chmod a+x check_bandwidth.sh
[root@wallet01 libexec]# ./check_bandwidth.sh -w 900 -c 950 em1
NIC em1 Status: OK - rx: 10 KBps - tx: 46 KBps|Rx(KBps)=10;;;; Tx(KBps)=46;;;;
[root@wallet01 libexec]# ./check_uptime
Uptime OK: 16 day(s) 0 hour(s) 20 minute(s) | uptime=23060.000000;;;
[root@wallet01 ~]# service xinetd start
[root@wallet01 ~]# service xinetd status
xinetd (pid 18791) is running...
[root@wallet01 ~]# netstat -tunlp | grep 5666
tcp 0 0 :::5666 :::* LISTEN 18791/xinetd
[root@monitor ~]# vi /etc/icinga/objects/commands.cfg
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
define command{
command_name check_http
command_line $USER1$/check_http -H $HOSTADDRESS$ -p $ARG1$ -e $ARG2$
}
[root@monitor ~]# vi /etc/icinga/objects/templates.cfg
define host{
name generic-host ; The name of this host template
notifications_enabled 1 ; Host notifications are enabled
event_handler_enabled 1 ; Host event handler is enabled
flap_detection_enabled 1 ; Flap detection is enabled
failure_prediction_enabled 1 ; Failure prediction is enabled
process_perf_data 1 ; Process performance data
retain_status_information 1 ; Retain status information across program restarts
retain_nonstatus_information 1 ; Retain non-status information across program restarts
notification_period 24x7 ; Send host notifications at any time
register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
}
define host{
name linux-server ; The name of this host template
use generic-host ; This template inherits other values from the generic-host template
check_period 24x7 ; By default, Linux hosts are checked round the clock
check_interval 5 ; Actively check the host every 5 minutes
retry_interval 1 ; Schedule host check retries at 1 minute intervals
max_check_attempts 10 ; Check each Linux host 10 times (max)
check_command check-host-alive ; Default command to check Linux hosts
notification_period workhours ; Linux admins hate to be woken up, so we only notify during the day
; Note that the notification_period variable is being overridden from
; the value that is inherited from the generic-host template!
notification_interval 120 ; Resend notifications every 2 hours
notification_options d,u,r ; Only send notifications for specific host states
contact_groups admins ; Notifications get sent to the admins by default
register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL HOST, JUST A TEMPLATE!
}
define service{
name generic-service ; The 'name' of this service template
active_checks_enabled 1 ; Active service checks are enabled
passive_checks_enabled 1 ; Passive service checks are enabled/accepted
parallelize_check 1 ; Active service checks should be parallelized (disabling this can lead to major performance problems)
obsess_over_service 1 ; We should obsess over this service (if necessary)
check_freshness 0 ; Default is to NOT check service 'freshness'
notifications_enabled 1 ; Service notifications are enabled
event_handler_enabled 1 ; Service event handler is enabled
flap_detection_enabled 1 ; Flap detection is enabled
failure_prediction_enabled 1 ; Failure prediction is enabled
process_perf_data 1 ; Process performance data
retain_status_information 1 ; Retain status information across program restarts
retain_nonstatus_information 1 ; Retain non-status information across program restarts
is_volatile 0 ; The service is not volatile
check_period 24x7 ; The service can be checked at any time of the day
max_check_attempts 3 ; Re-check the service up to 3 times in order to determine its final (hard) state
check_interval 1 ; Check the service every 10 minutes under normal conditions
retry_interval 2 ; Re-check the service every two minutes until a hard state can be determined
contact_groups admins ; Notifications get sent out to everyone in the 'admins' group
notification_options w,u,c,r ; Send notifications about warning, unknown, critical, and recovery events
notification_interval 60 ; Re-notify about service problems every hour
notification_period 24x7 ; Notifications can be sent out at any time
register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
}
[root@monitor ~]# vi /etc/icinga/objects/linux.cfg
define host{
use linux-server
host_name wallet01
alias wallet01
icon_image redhat.gif
statusmap_image redhat.gd2
address 192.168.40.50
}
define hostgroup{
hostgroup_name tomcat-server
alias tomcat-server
members wallet01
}
define service{
hostgroup_name tomcat-server
use generic-service
service_description alive
check_command check_ping!100.0,20%!500.0,60%
}
define service{
hostgroup_name tomcat-server
use generic-service
service_description os cpu usage
check_command check_nrpe!check_cpu
}
define service{
hostgroup_name tomcat-server
use generic-service
service_description os memory usage
check_command check_nrpe!check_memory
}
define service{
hostgroup_name tomcat-server
use generic-service
service_description os disk usage
check_command check_nrpe!check_disk
}
define service{
hostgroup_name tomcat-server
use generic-service
service_description os network usage
check_command check_nrpe!check_network
}
define service{
hostgroup_name tomcat-server
use generic-service
service_description os uptime
check_command check_nrpe!check_uptime
}
define service{
host_name wallet01
use generic-service,nagiosgraph
service_description gsoaweb status
check_command check_http!80!200
}
[root@monitor ~]# vi /etc/icinga/icinga.cfg
cfg_file=/etc/icinga/objects/linux.cfg
[root@monitor ~]# service icinga start
Running configuration check...OK
Starting icinga: Starting icinga done.
[root@monitor ~]# service icinga status
Icinga (pid 23725) is running...