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Nagios是一款開源的免費網絡監視工具,能有效監控Windows、Linux和Unix的主機狀態,交換機路由器等網絡設置,打印機等。在系統或服務狀態異常時發出郵件或短信報警第一時間通知網站運維人員,在狀態恢復后發出正常的郵件或短信通知。
前提時間需要同步
1.nagios依賴于php、http
2.查看依賴包是否已經被安裝好
#rpm -q gcc glibc glibc-common gd gd-devel xinetd openssl-devel
默認的是沒有gd-devel和xinetd的
# yum -y localinstall gd-devel-2.0.35-11.el6.x86_64.rpm # yum install xinetd
3.添加nagios用戶組、用戶
# groupadd nagcmd # useradd -G nagcmd nagios # id nagios uid=501(nagios) gid=502(nagios) 組=502(nagios),501(nagcmd) # usermod -a -G nagcmd apache
4.安裝nagios和nagios-plugins
# tar xf nagios-4.0.2.tar.gz # cd nagios-4.0.2 # ./configure --prefix=/usr/local/nagios --with-command-group=nagcmd --enable-event-broker --sysconfdir=/etc/nagios # make all # make install # make install-init # make install-commandmode # make install-config # make install-webconf # htpasswd -c /etc/nagios/htpasswd.users nagiosadmin New password: Re-type new password: Adding password for user nagiosadmin # service httpd restart # chkconfig --add nagios # chkconfig nagios on # tar xf nagios-plugins-1.5.tar.gz # cd nagios-plugins-1.5 # ./configure --with-nagios-user=nagios --with-nagios-group=nagios # make && make install # service nagios start 關閉selinux,防止selinux組織腳本運行
5.登錄nagios-web界面
http://nagiosIP/nagios
輸入用戶名和密碼
6.被監控端安裝nagios-plugins
所需軟件nagios-plugins、nrpe
# tar xf nagios-plugins-1.5.tar.gz # useradd -s /sbin/nologin nagios # cd nagios-plugins-1.5 # ./configure --with-nagios-user=nagios --with-nagios-group=nagios # make all # make install
7.被監控端安裝nrpe
# tar xf nrpe-2.15.tar.gz # cd nrpe-2.15 # ./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 # /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d //啟動nrpe服務 或者 # vim /etc/init.d/nrped #!/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 # /etc/init.d/nrped start
8.在主監控添加nrpe的定義
# 'check_nrpe' command definition define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ }
9.增加主機監控配置項
# vim /etc/nagios/objects/131.cfg define host{ use linux-server host_name 192.168.235.131 alias 192.168.235.131 address 192.168.235.131 } define service{ use generic-service host_name 192.168.235.131 service_description load check_command check_nrpe!check_load } define service{ use generic-service host_name 192.168.235.131 service_description PING check_command check_ping!100.0,20%!200.0,50% max_check_attempts 5 normal_check_interval 1 } define service{ use generic-service host_name 192.168.235.131 service_description FTP check_command check_ftp!21 max_check_attempts 5 normal_check_interval 1 } define service{ use generic-service host_name 192.168.235.131 service_description SSH check_command check_ssh max_check_attempts 5 normal_check_interval 1 } define service{ use generic-service host_name 192.168.235.131 service_description HTTP check_command check_http max_check_attempts 5 normal_check_interval 1 } # vim /etc/nagios/nagios.cfg cfg_file=/etc/nagios/objects/131.cfg # service nagios reload 重載刷新nagios-web界面可以看到添加的被監控主機
好了,此處nagios已經被安裝好了,而且被監控節點也已經上線了!
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