Debian 系統安裝 Nagios 伺服器監控端

標籤：

1. 安裝
   apt-get update
   apt-get install nagios* perl
   apt-get install --no-install-recommends pnp4nagios
   apt-get install apache2 apache2-utils php5 php-pear

2. 修改npcd設定
   # vim /etc/default/npcd
   Run="yes"
   # service npcd start

3. 添加process_perfdata.pl執行許可權
   chmod +x /usr/lib/pnp4nagios/libexec/process_perfdata.pl
4. 修改commands.cfg設定(注釋舊命令)
   vi /etc/nagios3/commands.cfg
   

   # ‘process-host-perfdata‘ command definitiondefine command{   command_name   process-host-perfdata   #command_line   /usr/bin/printf "%b" "$LASTHOSTCHECK$\t$HOSTNAME$\t$HOSTSTATE$\t$HOSTATTEMPT$\t$HOSTSTATETYPE$\t$HOSTEXECUTIONTIME$\t$HOSTOUTPUT$\t$HOSTPERFDATA$\n" >> /var/lib/nagios3/host-perfdata.out   command_line   /usr/bin/perl /usr/lib/pnp4nagios/libexec/process_perfdata.pl   }# ‘process-service-perfdata‘ command definitiondefine command{   command_name   process-service-perfdata   #command_line   /usr/bin/printf "%b" "$LASTSERVICECHECK$\t$HOSTNAME$\t$SERVICEDESC$\t$SERVICESTATE$\t$SERVICEATTEMPT$\t$SERVICESTATETYPE$\t$SERVICEEXECUTIONTIME$\t$SERVICELATENCY$\t$SERVICEOUTPUT$\t$SERVICEPERFDATA$\n" >> /var/lib/nagios3/service-perfdata.out   command_line   /usr/bin/perl /usr/lib/pnp4nagios/libexec/process_perfdata.pl   }

   commands.cfg Code
5. 修改nagios.cfg配置
   vi /etc/nagios3/nagios.cfg 修改以下3行配置
   process_performance_data=1
   host_perfdata_command=process-host-perfdata
   service_perfdata_command=process-service-perfdata
   修改check_external_commands=1 (未修改可能導致web網站無法Re-schedule監控項)
   修改enable_flap_detection=0 (雖然文檔裡說預設是0，但實際為1.改為0之後就解決了flapping state)
6. 修改services_nagios2.cfg配置
   vi /etc/nagios3/conf.d/services_nagios2.cfg
   notification_interval 1
   vi /etc/nagios3/conf.d/generic-service_nagios2.cfg
   notification_interval 1

7. 刪除install.php
   # cd /usr/share/pnp4nagios/html
   # mv install.php install.php.bak

8. Nagios外掛程式目錄: /usr/lib/nagios/plugins/
9. 添加pnp4nagios外掛程式
   vi /etc/nagios3/conf.d/pnp4nagos.cfg 追加如下配置
   

   define host {        name       host-pnp        action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$‘class=‘tips‘rel=‘/pnp4nagios/index.php/popup?host=$HOSTNAME$&srv=_HOST_        register   0        process_perf_data       1}define service {        name       srv-pnp        action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$‘class=‘tips‘rel=‘/pnp4nagios/index.php/popup?host=$HOSTNAME$&srv=$SERVICEDESC$        register   0        process_perf_data       1}

   Code
10. 預設是沒有監控記憶體的，若需要監控複製check_mem.sh檔案到外掛程式目錄，再添加相關設定檔
    添加自訂執行命令
    vi /etc/nagios3/conf.d/custom_commond.cfg
    

    define command{        command_name        check_mem        command_line        $USER1$/check_mem.sh -w $ARG1$ -c $ARG2$        }

    Code添加原生check_mem服務
    vi /etc/nagios3/conf.d/localhost_nagios2.cfg  添加如下配置
    

    define service{        use                             local-service,srv-pnp        host_name                       localhost        service_description             check_mem        check_command                   check_mem!80!90        }

    Code
11. 監控伺服器網卡流量
    apt-get install snmpd snmp-mibs-downloader
    vi /etc/snmp/snmpd.conf（可備份snmpd.conf,修改下面的localhost－IP為伺服器IP，儲存此檔案即可）
    

    com2sec notConfigUser 127.0.0.1 public com2sec notConfigUser localhost-IP public group notConfigGroup v1 notConfigUser group notConfigGroup v2c notConfigUser view systemview included .1.3.6.1.2.1.1 view systemview included .1.3.6.1.2.1.2 view systemview included .1.3.6.1.2.1.25.1.1 view all included .1 access notConfigGroup "" any noauth exact all none none 

    Code

    重啟snmpd服務
    下載check_traffic.sh到外掛程式目錄
    cd /usr/lib/nagios/plugins/
    測試執行
    ./check_traffic.sh -V 2c -C public -H your_ip -I 2 -w 1200,1500 -c 1700,1800 -K -B
    # vi /etc/nagios3/conf.d/custom_commond.cfg  追加

    define command{        command_name    check_traffic        command_line    $USER1$/check_traffic.sh -V 2c -C public -H $HOSTADDRESS$ -I $ARG1$ -w $ARG2$ -c $ARG3$ -M -b}

    Code

12. 當服務停止時重新監控失敗，運行以下2行命令
    # dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios3/rw
    # dpkg-statoverride --update --add nagios www-data 751 /var/lib/nagios3

13. 配置發送郵件功能
    apt-get install ssmtp   (備用：apt-get install sendmail-bin  sendmail)
    修改ssmpt.conf檔案配置
    # vi /etc/ssmtp/ssmtp.conf  追加Google郵箱配置方式(勿開啟2步驗證)
    

    AuthUser=NagiosAdminAuthPass=PassWordFromLineOverride=YESmailhub=smtp.gmail.com:587UseSTARTTLS=YES

    Code

    service sendmail stop
    chkconfig sendmail off
    cd /usr/sbin
    mv sendmail sendmail.bak
    ln -s /usr/sbin/ssmtp /usr/sbin/sendmail
    測試發郵件即可

14. 添加被監控機需要注意
    監控其他主機，需要添加check_nrpe命令，但在Debian系統中，添加check_nrpe命令會提示重複，但是卻找不到其他地方有配置。
    所以需要將check_nrpe改成其他名
    

    define command{        command_name custom_check_nrpe        command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$        }

    Code

Debian 系統安裝 Nagios 伺服器監控端