很久沒有更新博客了，記錄下我在生產環境下安裝nagios3.2.0，
一、nagios 的安裝
1.1 基礎支持套件
1）gcc glibc glibc-common gd gd-devel xinetd openssl-devel
# yum install -y gcc glibc glibc-common gd gd-devel xinetd openssl-devel
2）部署lamp環境 yum install httpd mysql mysql-server php php-mysql -y ，或源碼安裝
1.2 創建nagios用戶和用戶組
# /usr/sbin/useradd -m nagios
# /usr/sbin/useradd apache -M -s /sbin/nologin
# /usr/sbin/groupadd nagcmd
# /usr/sbin/usermod -a -G nagcmd nagios
# /usr/sbin/usermod -a -G nagcmd apache
1.3 編譯安裝nagios
# wget http://sourceforge.net/projects/nagios/files/nagios-3.x/nagios-3.2.0/nagios-3.2.0.tar.gz/download
# tar zxvf nagios-3.2.0.tar.gz
# cd nagioss-3.2.0
# ./configure --prefix=/usr/local/nagios --with-group=nagios --with-user=nagios --with-command-group=nagcmd
# make all
# make install
# make install-init
# make install-config
# make install-commandmode
# make install-webconf
驗證程序是否被正確安裝
切換目錄到安裝路徑（這裏是/usr/local/nagios），看是否存在etc、bin、sbin、share、var 這五個目錄，
1.4 設置開機自起
# chkconfig --add nagios
# chkconfig nagios on
1.5 安裝nagios插件
# wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
# tar zxvf nagios-plugins-1.4.15.tar.gz
# cd nagios-plugins-1.4.15
# ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules
# make && make install
1.6 創建apache目錄驗證文件
# htpasswd -c /usr/local/nagios/etc/htpasswd nagios
1.7 給nagios用戶開權限，讓他能夠查看信息
# vim /usr/local/nagios/etc/cgi.cfg 在所有的nagiosadmin後面添加nagios用，隔開
:%s/nagiosadmin/nagiosadmin\,nagios/g
到這裏nagios 的安裝也就基本完成了，啓動apache，你可以通過web來訪問了
1.8 定義監控項 在/usr/local/nagios/etc/objects目錄下
時間timeperiods.cfg 配置文件
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
}
插件commands.cfg
define command{
command_name check-host-alive
command_line $USER1$/check_ping -H $HOSTADDRESS$ -w 3000.0,80% -c 5000.0,100% -p 5
}
監控誰localhost.cfg
define host {
host_name fudong
alias test
address 0.0.0.0
check_command check-host-alive
notification_options d,u,r
check_interval 1
max_check_attempts 2
contact_groups admins
notification_interval 10
notification_period 24x7
}
聯繫人contacts.cfg
define contact {
contact_name kyo
alias kyo
host_notification_period 24x7
host_notification_options d,u,r
service_notification_period 24x7
service_notification_options w,u,c,r
service_notification_commands notify-service-by-email
host_notification_commands notify-host-by-email
email [email protected]
}
define contactgroup{
contactgroup_name admins
alias Nagios Administrators
members nagiosadmin,kyo
}
1.9 檢查錯誤
# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
二、監控遠程主機nrpe插件的安裝(被監控主機上的)
2.1 解決perl編譯問題與時間同步
# echo "export LC_ALL=C">>/etc/profile
# source /etc/profile
# /usr/sbin/ntpdate pool.ntp.org
# uptime
2.2 安裝Nagios所需要的基礎軟件包
# yum install gcc glibc glibc-common gd gd-devdel openssl-devel -y
2.3 建立nagios用戶
# useradd nagios
2.4 安裝插件
# tar zxvf nagios-plugins-1.4.15.tar.gz
# cd nagios-plugins-1.4.15
# ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
# make && make install
2.5 安裝NRPE
# wget http://prdownloads.sourceforge.net/sourceforge/nagios/nrpe-2.13.tar.gz
# tar zxvf nrpe-2.13.tar.gz
# cd nrpe-2.13
# ./configure
# make all
# make install-plugin #監控機需要安裝check_nrpe 這個插件，被監控機並不需要，
# make install-daemon
# make install-daemon-config
# make install-xinetd
2.6 在被監控機上開啓nrpe
# vim /etc/xinetd.d/nrpe
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
flags = REUSE
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_failure += USERID
disable = no
only_from = 192.168.18.254 ＃監控主機的ip，保證他可以連接進來！
}
2.7 編輯/etc/services 文件，增加NRPE服務
# vim /etc/services
nrpe 5666/tcp
# service xinetd restart
2.8 查看NRPE是否啓動與測試
# netstat -an |grep 5666
# /usr/local/nagios/libexec/check_nrpe -H 192.168.18.188
NRPE v2.12 返回當前NRPE的版本 也就是在本地用check_nrpe連接nrpe daemon是正常的。
注：爲了後面工作的順利進行，注意本地防火牆要打開5666能讓外部的監控機訪問。
# iptables -I INPUT -p tcp --dport 5666 -j ACCEPT
2.9 查看NRPE的監控命令
# vim /usr/local/nagios/etc/nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_u]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
通過以上字段來定義命令，以及接收命令後執行的插件。
重啓nagios服務