Nagios 搭建與配置
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實(shí)驗(yàn)環(huán)境 centos6.5 兩臺(tái)
實(shí)驗(yàn)步驟
一.安裝Nagios的依賴關(guān)系:
yum -y install httpd gcc glibc glibc-common gd gd-devel php php-MySQL mysql mysql-devel mysql-server xinetd
二.安裝配置Nagios(監(jiān)控本機(jī))
添加nagios運(yùn)行所需要的用戶和組:
useradd nagios
把a(bǔ)pache加入到nagios組
usermod -a -G nagios apache
上傳nagios包,加壓后編譯安裝nagios:
tar -zxf nagios-4.0.3.tar.gz
cd nagios-4.0.3
./configure --with-command-group=nagios --enable-event-broker
make all (編譯全部)
make install (安裝)
make install-init (生成啟動(dòng)腳本文件)
make install-commandmode (設(shè)置組的執(zhí)行權(quán)限)
make install-config (生成配置文件)
make install-webconf (安裝nagios的web文件到httpd的conf.d目錄下)
為email指定您想用來(lái)接收nagios警告信息的郵件地址,默認(rèn)是本機(jī)的nagios用戶:
vim /usr/local/nagios/etc/objects/contacts.cfg
修改配置 email nagios@localhost 這個(gè)是默認(rèn)設(shè)置
創(chuàng)建一個(gè)登錄nagios web程序的用戶,這個(gè)用戶帳號(hào)在以后通過(guò)web登錄nagios認(rèn)證時(shí)所用:htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
以上過(guò)程配置結(jié)束以后需要啟動(dòng)httpd:
/etc/init.d/httpd start
編譯、安裝nagios-plugins(插件)
tar -zxf nagios-plugins-1.5.tar.gz
cd nagios-plugins-1.5
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
檢查其主配置文件的語(yǔ)法是否正確:
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
如果上面的語(yǔ)法檢查沒(méi)有問(wèn)題,接下來(lái)就可以正式啟動(dòng)nagios服務(wù)了: service nagios start
關(guān)閉selinux:setenforce 0
關(guān)閉防火墻:service iptables stop
修改本地監(jiān)控配置文件:vim /usr/local/nagios/etc/objects/localhost.cfg
通過(guò)web界面查看nagios:
http://your_nagios_IP/nagios
這時(shí)候已將可以監(jiān)控Linux本機(jī)。瀏覽器測(cè)試:‘IP地址’/nagios
三.基于NRPE(橋梁)監(jiān)控遠(yuǎn)程Linux主機(jī)
配置-監(jiān)控端
1).安裝NRPE
tar -xf nrpe-2.12.tar.gz
cd nrpe-2.12
./configure --with-nrpe-user=nagios \
--with-nrpe-group=nagios \
--with-nagios-user=nagios \
--with-nagios-group=nagios \
--enable-command-args \
--enable-ssl
make all
make install-plugin (設(shè)置插件權(quán)限)
2).添加策略
vim /usr/local/nagios/etc/objects/commands.cfg
添加:define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
3).定義監(jiān)控對(duì)象,復(fù)制一個(gè)模板 cp localhost.cfg linux.cfg
編輯模塊文件:
vim linux.cfg (:%s /localhost/linux/g[修改localhost為linux])
host_name linux
address 被監(jiān)控端的IP
將這五行注釋掉
define hostgroup{
hostgroup_name linux-servers ; The name of the hostgroup
alias Linux Servers ; Long name of the group
members linux ; Comma separated list of hosts that belong to this group
}
修改 check_command 為 check_nrpe_procs(中間的部分不用動(dòng)只修改最后的部分)
4).添加模塊
vim /usr/local/nagios/etc/objects/commands.cfg
添加:
define command{
command_name check_nrpe_disk
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c "check_disk"
}
define command{
command_name check_nrpe_users
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c "check_users"
}
define command{
command_name check_nrpe_procs
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c "check_procs"
}
define command{
command_name check_nrpe_load
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c "check_load"
}
define command{
command_name check_nrpe_swap
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c "check_swap"
}
vim vim /usr/local/nagios/etc/nagios.cfg 添加一條
cfg_file=/usr/local/nagios/etc/objects/linux.cfg
cd objects/
5).給權(quán)限:
chown nagios.nagios linux.cfg chmod 664 linux.cfg
6).啟動(dòng)服務(wù):
service nagios restart
2.安裝配置-被監(jiān)控端
1)先添加nagios用戶
useradd -s /sbin/nologin nagios
2)NRPE依賴于nagios-plugins,因此,需要先安裝nagios-plugins
tar -zxf nagios-plugins-1.5.tar.gz
cd nagios-plugins-1.5
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make all
make install
3)安裝NRPE
tar -xf nrpe-2.12.tar.gz
cd nrpe-2.12.tar.gz
./configure --with-nrpe-user=nagios \
--with-nrpe-group=nagios \
--with-nagios-user=nagios \
--with-nagios-group=nagios \
--enable-command-args \
--enable-ssl
make all
make install-plugin
make install-daemon
make install-daemon-config
make install-xinetd (生成臨時(shí)服務(wù))
4).修改文件:
vim /etc/xinetd.d/nrpe
only-from=127.0.0.1 10.1.1.2(這個(gè)是監(jiān)控端nagios的IP)(nrpe允許以上IP的機(jī)器通過(guò)nrpe查詢服務(wù))
vim /etc/services
文件最后添加一條:nrpe 5666/tcp nrpe
5).啟動(dòng)守護(hù)進(jìn)程
service xinetd start
6).配置NRPE
vim /usr/local/nagios/etc/nrpe.cfg
log_facility=daemon
pid_file=/var/run/nrpe.pid
server_address=被監(jiān)控端的IP
server_port=5666
nrpe_user=nagios
nrpe_group=nagios
allowed_hosts=監(jiān)控端的IP
command_timeout=60
connection_timeout=300
debug=0
command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p / (記得修改?。?/p>
command[check_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200(記得修改!)
添加一條:command[check_swap]=/usr/local/nagios/libexec/check_disk -w 40% -c 20%
7).啟動(dòng)NRPE
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d(臨時(shí)啟動(dòng))
或者將如下內(nèi)容定義為vim /etc/init.d/nrped腳本:
!/bin/bash
chkconfig: 2345 88 12
description: NRPE DAEMON
NRPE=/usr/local/nagios/bin/nrpe
NRPECONF=/usr/local/nagios/etc/nrpe.cfg
case "$1" in
start)
echo -n "Starting NRPE daemon..."
$NRPE -c $NRPECONF -d
echo " done."
;;
stop)
echo -n "Stopping NRPE daemon..."
pkill -u nagios nrpe
echo " done."
;;
restart)
$0 stop
sleep 2
$0 start
;;
*)
echo "Usage: $0 start|stop|restart"
;;
esac
exit 0
chmod -R 777 /etc/init.d/nrped
8).啟動(dòng)服務(wù)
/etc/init.d/nrped start
service xinetd restart
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