View Source: NagiosNotes - Waikato Linux Users Group

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! Passive Service / Host Checks

Passive checks allow you to feed status information into [Nagios] at a time of your choosing rather than having [Nagios] continuously poll some device.

The typically way to implement them is using NSCA (Nagios Service Command Acceptor)

NSCA runs on the same server as [Nagios] and listens on a port to accept incoming results.

__Example Nagios Passive service template__
<verbatim>
# APC UPS Passive Check
define service {
        use                             generic-service
        name                            g-apc-ups

        service_description             APC UPS Power
        max_check_attempts              1
        normal_check_interval           5
        retry_check_interval            1
        notification_interval           30
        notification_period             24x7
        notification_options            u,w,c,r

contact_groups                  admin-lists

        flap_detection_enabled          0
        active_checks_enabled           0
        check_command                   check_ping

        register                        0
}
# Machines connected to an APC ups
define service {
        use                     g-apc-ups
        hostgroup_name          ups_servers
}
</verbatim>

__Example NSCA config__
<verbatim>
####################################################
# NSCA Daemon Config File
# Last Modified: 25 Feb 2005
####################################################

# PORT NUMBER
server_port=5667

# ALLOWED HOST ADDRESSES
allowed_hosts=192.168.70.10,192.168.70.234
# Plaintext passwords!
password=your-password
decryption_method=1

nsca_user=nagios
nsca_group=nagios
debug=0
command_file=/var/log/nagios/rw/nagios.cmd
alternate_dump_file=/var/log/nagios/rw/nsca.dump
aggregate_writes=0
append_to_file=0
max_packet_age=30
</verbatim>

__Example to generate a passive event__
<verbatim>
#!/bin/bash
#
# Setup some defaults to be used by the notification scripts

HOSTNAME=`hostname`
NAGIOS_HOST="x.x.x.x"
NSCA_CONFIG="/etc/nsca.conf"
SERVICE="APC UPS Power"

send_alert() {

        echo "$HOSTNAME    $SERVICE        $1      $2
" | /usr/bin/send_nsca -H $NAGIOS_HOST -c $NSCA_CONFIG &>/dev/null

}
</verbatim>

Source the above script and then call ''send_alert "0" "Status Msg here"''

* 0 == OK
* 1 = WARNING
* 2 = CRITICAL
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Last edited on Monday, May 8, 2006 4:13:19 pm by MattBrown
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