搭建nagios的目的就是爲了他的報警系統，nagios據我所瞭解可以有三種報警：
一、聲音報警
二、電子郵件報警
三、手機短訊報警
四、傳真告警
下面是我的郵件報警的配置過程：
1、開啓系統自帶的sendmail郵件系統
service sendmail start
如果沒有安裝，可以yum一下
yum install -y sendmail*
service sendmail restart
測試發送郵件：
echo "test" | mail [email protected]
注：iptables和selinux設置
2、配置nagios中報警郵箱
vi /usr/local/nagios/etc/objects/contacts.cfg
define contact{
contact_name mail ; Short name of user
alias null ; Full name of user
service_notification_period 24x7 （和如下時間模版（timeperiod）保持一致）
host_notification_period 24x7
service_notification_options w,u,c,r
host_notification_options d,u,r
service_notification_commands notify-service-by-email
host_notification_commands notify-host-by-email
email [email protected]
}
在email那裏加上自己的郵箱，如果有多個可以用逗號隔開
3、設置報警方式：
define timeperiod{
timeperiod_name 24x7
alias 24 Hours A Day, 7 Days A Week
sunday 00:00-24:00
monday 00:00-24:00
tuesday 00:00-24:00
wednesday 00:00-24:00
thursday 00:00-24:00
friday 00:00-24:00
saturday 00:00-24:00
}
這兩個notify-service-by-email 和 notify-host-by-email 是在command.cfg那裏定義的，看看是怎麼定義的：# 'notify-service-by-email' command definition
define command{
command_name notify-service-by-email
command_line echo " ** $NOTIFICATIONTYPE$ Service Alert: $HOSTNAME$/$HOSTADDRESS$ $SERVICEDESC$ is $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$ Additional Info:$SERVICEOUTPUT$ "| formail -I "Subject: $HOSTADDRESS$*$SERVICEOUTPUT$*$LONGDATETIME$"| sendmail -oi $CONTACTEMAIL$
}
# '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" | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$
}
這裏已經默認配置好，我們不用修改直接調用就是了
最後重啓服務：
service nagios retart
進行破環性測試！