Nagios是一款開源電腦系統和網絡監視工具，能夠有效監控windows,linux，Uninx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運維人員，在狀態恢復後發出正常的郵件或短信報警通知。
Nagios Core 是一個開源的系統，Nagios XI是收費的。我們這裏安裝前者。
一、Nagios 結構說明
Nagios 結構上來說， 可分爲核心和插件兩個部分。Nagios 的核心部分只提供了很少的監控功能，因此要搭建一個完善的 IT 監控管理系統，用戶還需要在 Nagios 服務器安裝相應的插件，插件可以從 Nagios 官方網站下載 http://www.nagios.org/，也可以根據實際要求自己編寫所需的插件。
Nagios 可實現的功能特性：
監控網絡服務（SMTP、POP3、HTTP、FTP、PING 等）；
監控本機及遠程主機資源（CPU 負荷、磁盤利用率、進程 等）；
允許用戶編寫自己的插件來監控特定的服務，方便地擴展自己服務的檢測方法，支持多種開發語言（Shell、Perl、Python、PHP 等）
具備定義網絡分層結構的能力，用"parent"主機定義來表達網絡主機間的關係，這種關係可被用來發現和明晰主機宕機或不可達狀態；
當服務或主機問題產生與解決時將告警發送給聯繫人（通過 EMail、短信、用戶定義方式）；
可以支持並實現對主機的冗餘監控；
可用 WEB 界面用於查看當前的網絡狀態、通知和故障歷史、日誌文件等；
二．Nagios工作原理
Nagiosq的功能是監控服務和主機，但也是 他 自身並不包括這部分功能，所有的監控，檢測功能都是通過各種插件來完成的。
啓動Nagios後他會週期性的自動調用插件去檢查服務器狀態 ，同時Nagios會維持一個列隊，所有插件返回來的狀態信息都進入列隊 ，Nagios每次都從隊首開始讀取信息，並進行處理，把狀態結果通過web結果通過顯示出來
Nagios提供了許多插件，利用這些插件可以方便的監控很多服務狀態，安裝完成 後，在Nagios主目錄下的/libexec裏放有nagios自的可以使用的所有插件，如，check_disk是檢查磁盤空間的插件，check_load是檢查CPU負載的，等等。每一個插件可以通過運行 ./check_xxx –h 來查看使用方法和功能；
Nagios可以識別4種狀態返回信息，即0（OK）表示狀態正常/綠色，1（WARNING）表示出現警告/X色，2（CRITTCAL）表示出現 非常嚴重 的錯誤/紅色，3（UNKNOWN）表示未知錯誤 、深X色。Nagios根據插件返回來的值，來判斷 監控對象的狀態，並通過web顯示出來，以提供管理員及時發現故障
再說報警功能，如果 監控系統發現問題不能報警那就沒有意義了，所以報警也是nagios很重要的功能之一，但是，同樣的，Nagios自身業沒有報警部分的代碼，甚至沒有插件，而是交給用戶或者其他 相關開源項目組去完成
Nagios安裝，是指基本平臺，也就是Nagios軟件包的安裝，它是監控體系的框架，也是所有監控基礎。
Nagios通過NRPE來遠端管理服務
Nagios執行安裝在它裏面的check_nrpe插件，並告訴check_nrpe去檢測哪些服務。
通過SSL,check_nrpe連接遠端 機子上的NRPE daemon
NRPE運行本地的各種插件去檢測本地的服務和狀態
最後，NRPE把檢測的結果傳給主機端check_nrpe,check_nrpe在把結果 送到Nagios狀態隊列中，
Nagios依次讀取隊列中信息，再把結果顯示出來
二．Nagios部署
備註：默認情況下Nagios沒有數據庫，可以安裝NDOUtils保存Nagios數據到Mysql數據庫中。
1、環境準備
設置或停止防火牆：
[root@localhost ~]# systemctl stop firewalld.service [root@localhost ~]# systemctl disable firewalld.service
關閉selinux：
臨時關閉： [root@localhost ~]# setenforce 0 永久關閉（修改配置文件）： [root@localhost ~]# vi /etc/selinux/config 改成SELINUX=disabled
[root@localhost ~]# rpm -qa httpd* [root@localhost ~]# rpm -e --nodeps 包名 有多個httpd*，用腳本刪除for name in `rpm -qa httpd*`;do rpm -e --nodeps $name;done
[root@localhost ~]# rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm [root@localhost ~]# yum install wget lrzsz vim lynx lsof netstat-tools unzip -y
時區設置：
[root@localhost ~]timedatectl [root@localhost ~]timedatectl list-timezones #該命令列出了所有的時區 [root@localhost ~]timedatectl set-timezone Asia/Shanghai #該命令把時區設置爲上海
時間同步：
[root@localhost ~]# ntpdate time.nist.gov #如果沒有yum安裝此命令 [root@localhost ~]# /usr/sbin/ntpdate time.nist.gov [root@localhost ~]# crontab -e */10**** /usr/sbin/ntpdate time.nist.gov >/dev/null 2>&1
2、源碼安裝nagios core（主程序）
參考：https://support.nagios.com/kb/article/nagios-core-installing-nagios-core-from-source-96.html#_ga=2.130440076.2034626946.1559144380-1378811618.1556870555
[root@localhost ~]# yum install -y gcc glibc glibc-common wget unzip httpd php gd php-gd gd-devel perl postfix [root@localhost ~]# cd /tmp [root@localhost tmp]# wget -O nagioscore.tar.gz https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.3.tar.gz [root@localhost tmp]# tar zxvf nagioscore.tar.gz [root@localhost tmp]# cd /tmp/nagioscore-nagios-4.4.3/ [root@localhost nagioscore-nagios-4.4.3]# ./configure [root@localhost nagioscore-nagios-4.4.3]# make all [root@localhost nagioscore-nagios-4.4.3]# make install-groups-users [root@localhost nagioscore-nagios-4.4.3]# usermod -a -G nagios apache
#安裝主程序
[root@localhost nagioscore-nagios-4.4.3]# make install [root@localhost nagioscore-nagios-4.4.3]# make install-daemoninit [root@localhost nagioscore-nagios-4.4.3]# systemctl enable httpd.service
#配置目錄權限
[root@localhost nagioscore-nagios-4.4.3]# make install-commandmode
#安裝示例配置文件
[root@localhost nagioscore-nagios-4.4.3]# make install-config
#安裝nagios的web接口,會在/etc/httpd/conf.d目錄中創建nagios.conf文件
[root@localhost nagioscore-nagios-4.4.3]# make install-webconf
執行上述操作後，會在/usr/local/nagios目錄下產生如下目錄：
bin：nagios執行程序所在的目錄，nagios文件即爲主程序。
etc：nagios配置文件目錄，當make install-config完以後etc下面就會出現默認的配置文件。
sbin：nagios CGI文件所在目錄，這裏存放的是一些外部命令執行程序。
share：nagios網頁文件目錄，存放一些html文件。
var：nagios日誌文件、pid等文件目錄。
Libexec：系統默認插件的存儲位置
修改nagios警告信息的郵件地址
[root@localhost ~]# vi /usr/local/nagios/etc/objects/contacts.cfg email [email protected] ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
nagiosadmin設置密碼
root@localhost ~]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin [root@localhost ~]# systemctl start httpd.service [root@localhost ~]# systemctl start nagios.service
http://192.168.146.128/nagios
不使用默認nagiosadmin賬號，新增gxm賬號並配置權限，如果不配置點擊Hosts會報紅色錯誤。
[root@localhost ~]# htpasswd -bc /usr/local/nagios/etc/htpasswd.users gxm 123456
[root@localhost ~]# cd /usr/local/nagios/etc/ [root@localhost etc]# sed -i 's#nagiosadmin#gxm#g' cgi.cfg [root@localhost etc]# grep gxm cgi.cfg authorized_for_system_information=gxm authorized_for_configuration_information=gxm authorized_for_system_commands=gxm authorized_for_all_services=gxm authorized_for_all_hosts=gxm authorized_for_all_service_commands=gxm authorized_for_all_host_commands=gxm [root@localhost etc]# systemctl restart httpd.service
#檢查語法錯誤
[root@localhost etc]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg Nagios Core 4.4.3 Copyright (c) 2009-present Nagios Core Development Team and Community Contributors Copyright (c) 1999-2009 Ethan Galstad Last Modified: 2019-01-15 License: GPL Website: https://www.nagios.org Reading configuration data... Read main config file okay... Read object config files okay... Running pre-flight check on configuration data... Checking objects... Checked 8 services. Checked 1 hosts. Checked 1 host groups. Checked 0 service groups. Checked 1 contacts. Checked 1 contact groups. Checked 24 commands. Checked 5 time periods. Checked 0 host escalations. Checked 0 service escalations. Checking for circular paths... Checked 1 hosts Checked 0 service dependencies Checked 0 host dependencies Checked 5 timeperiods Checking global event handlers... Checking obsessive compulsive processor commands... Checking misc settings... Total Warnings: 0 Total Errors: 0 Things look okay - No serious problems were detected during the pre-flight check
3、安裝nagios插件（監控功能通過插件完成）
上述安裝的Nagios主程序只是一個控制中心，而能夠起到服務監測和系統監測等功能的是衆多Nagios的插件，沒有插件的Nagios系統其實只是一個空殼。因此在安裝了Nagios平臺之後我們還需要安裝插件。
[root@localhost ~]# yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils epel-release [root@localhost ~]# yum install -y perl-Net-SNMP 或者 [root@localhost ~]# cd /tmp [root@localhost ~]# wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm [root@localhost ~]# rpm -ihv epel-release-latest-7.noarch.rpm [root@localhost ~]# subscription-manager repos --enable=rhel-7-server-optional-rpms [root@localhost ~]# yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils [root@localhost ~]# yum install -y perl-Net-SNMP [root@localhost ~]# cd /tmp [root@localhost ~]# wget --no-check-certificate -O nagios-plugins.tar.gz https://github.com/nagios-plugins/nagios-plugins/archive/release-2.2.1.tar.gz [root@localhost ~]# tar zxvf nagios-plugins.tar.gz [root@localhost ~]# cd /tmp/nagios-plugins-release-2.2.1/ [root@localhost nagios-plugins-release-2.2.1]# ./tools/setup [root@localhost nagios-plugins-release-2.2.1]# ./configure [root@localhost nagios-plugins-release-2.2.1]# make [root@localhost nagios-plugins-release-2.2.1]# make install [root@localhost nagios-plugins-release-2.2.1]# systemctl start nagios.service [root@localhost nagios-plugins-release-2.2.1]# systemctl stop nagios.service [root@localhost nagios-plugins-release-2.2.1]# systemctl restart nagios.service [root@localhost nagios-plugins-release-2.2.1]# systemctl status nagios.service [root@localhost libexec]# ll /usr/local/nagios/libexec -rwxr-xr-x 1 root root 210656 5月 31 11:54 check_apt -rwxr-xr-x 1 root root 2354 5月 31 11:54 check_breeze -rwxr-xr-x 1 root root 214653 5月 31 11:54 check_by_ssh lrwxrwxrwx 1 root root 9 5月 31 11:54 check_clamd -> check_tcp -rwxr-xr-x 1 root root 163022 5月 31 11:54 check_cluster -r-sr-xr-x 1 root root 211527 5月 31 11:54 check_dhcp -rwxr-xr-x 1 root root 227293 5月 31 11:54 check_disk -rwxr-xr-x 1 root root 9477 5月 31 11:54 check_disk_smb -rwxr-xr-x 1 root root 127110 5月 31 11:54 check_dummy -rwxr-xr-x 1 root root 3868 5月 31 11:54 check_file_age -rwxr-xr-x 1 root root 6512 5月 31 11:54 check_flexlm lrwxrwxrwx 1 root root 9 5月 31 11:54 check_ftp -> check_tcp -rwxr-xr-x 1 root root 209501 5月 31 11:54 check_hpjd -rwxr-xr-x 1 root root 375004 5月 31 11:54 check_http -r-sr-xr-x 1 root root 227225 5月 31 11:54 check_icmp -rwxr-xr-x 1 root root 169900 5月 31 11:54 check_ide_smart -rwxr-xr-x 1 root root 15283 5月 31 11:54 check_ifoperstatus -rwxr-xr-x 1 root root 13435 5月 31 11:54 check_ifstatus lrwxrwxrwx 1 root root 9 5月 31 11:54 check_imap -> check_tcp -rwxr-xr-x 1 root root 6992 5月 31 11:54 check_ircd lrwxrwxrwx 1 root root 9 5月 31 11:54 check_jabber -> check_tcp -rwxr-xr-x 1 root root 187685 5月 31 11:54 check_load -rwxr-xr-x 1 root root 6673 5月 31 11:54 check_log -rwxr-xr-x 1 root root 22741 5月 31 11:54 check_mailq -rwxr-xr-x 1 root root 173210 5月 31 11:54 check_mrtg -rwxr-xr-x 1 root root 170431 5月 31 11:54 check_mrtgtraf -rwxr-xr-x 1 root root 186817 5月 31 11:54 check_nagios lrwxrwxrwx 1 root root 9 5月 31 11:54 check_nntp -> check_tcp lrwxrwxrwx 1 root root 9 5月 31 11:54 check_nntps -> check_tcp -rwxr-xr-x 1 root root 219815 5月 31 11:54 check_nt -rwxr-xr-x 1 root root 218463 5月 31 11:54 check_ntp -rwxr-xr-x 1 root root 208212 5月 31 11:54 check_ntp_peer -rwxr-xr-x 1 root root 207193 5月 31 11:54 check_ntp_time -rwxr-xr-x 1 root root 250160 5月 31 11:54 check_nwstat -rwxr-xr-x 1 root root 9461 5月 31 11:54 check_oracle -rwxr-xr-x 1 root root 193042 5月 31 11:54 check_overcr -rwxr-xr-x 1 root root 223263 5月 31 11:54 check_ping lrwxrwxrwx 1 root root 9 5月 31 11:54 check_pop -> check_tcp -rwxr-xr-x 1 root root 224192 5月 31 11:54 check_procs -rwxr-xr-x 1 root root 185576 5月 31 11:54 check_real -rwxr-xr-x 1 root root 9687 5月 31 11:54 check_rpc -rwxr-xr-x 1 root root 1537 5月 31 11:54 check_sensors lrwxrwxrwx 1 root root 9 5月 31 11:54 check_simap -> check_tcp -rwxr-xr-x 1 root root 268781 5月 31 11:54 check_smtp -rwxr-xr-x 1 root root 269786 5月 31 11:54 check_snmp lrwxrwxrwx 1 root root 9 5月 31 11:54 check_spop -> check_tcp -rwxr-xr-x 1 root root 185227 5月 31 11:54 check_ssh lrwxrwxrwx 1 root root 9 5月 31 11:54 check_ssmtp -> check_tcp -rwxr-xr-x 1 root root 166806 5月 31 11:54 check_swap -rwxr-xr-x 1 root root 252843 5月 31 11:54 check_tcp -rwxr-xr-x 1 root root 186950 5月 31 11:54 check_time lrwxrwxrwx 1 root root 9 5月 31 11:54 check_udp -> check_tcp -rwxr-xr-x 1 root root 199442 5月 31 11:54 check_ups -rwxr-xr-x 1 root root 163288 5月 31 11:54 check_uptime -rwxr-xr-x 1 root root 157647 5月 31 11:54 check_users -rwxr-xr-x 1 root root 3040 5月 31 11:54 check_wave -rwxr-xr-x 1 root root 157770 5月 31 11:54 negate -rwxr-xr-x 1 root root 151307 5月 31 11:54 urlize -rwxr-xr-x 1 root root 1914 5月 31 11:54 utils.pm -rwxr-xr-x 1 root root 2791 5月 31 11:54 utils.sh
4、安裝nrpe（在需要監控的服務器上部署）
NRPE依賴於nagios-plugins，所以要一起安裝。
可參考：https://support.nagios.com/kb/article.php?id=515
[root@localhost ~]# yum install -y gcc glibc glibc-common openssl openssl-devel perl wget [root@localhost ~]# cd /tmp [root@localhost ~]# wget --no-check-certificate -O nrpe.tar.gz https://github.com/NagiosEnterprises/nrpe/archive/nrpe-3.2.1.tar.gz [root@localhost ~]# tar zxvf nrpe.tar.gz [root@localhost ~]# cd /tmp/nrpe-nrpe-3.2.1/ [root@localhost nrpe-nrpe-3.2.1]# ./configure --enable-command-args [root@localhost nrpe-nrpe-3.2.1]# make all [root@localhost nrpe-nrpe-3.2.1]# make install-groups-users [root@localhost nrpe-nrpe-3.2.1]# make install [root@localhost nrpe-nrpe-3.2.1]# make install-config [root@localhost nrpe-nrpe-3.2.1]# echo >> /etc/services [root@localhost nrpe-nrpe-3.2.1]# echo '# Nagios services' >> /etc/services [root@localhost nrpe-nrpe-3.2.1]# echo 'nrpe 5666/tcp' >> /etc/services [root@localhost nrpe-nrpe-3.2.1]# make install-init [root@localhost nrpe-nrpe-3.2.1]# systemctl enable nrpe.service
#添加nagios服務器IP，運行服務器連接nrpe
[root@localhost nrpe-nrpe-3.2.1]# vi /usr/local/nagios/etc/nrpe.cfg allowed_hosts=127.0.0.1,192.168.146.128 dont_blame_nrpe=1 [root@localhost nrpe-nrpe-3.2.1]# systemctl start nrpe.service [root@localhost ~]# cat /usr/lib/systemd/system/nrpe.service [root@localhost nrpe-nrpe-3.2.1]# /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1 NRPE v3.2.1 [root@localhost nrpe-nrpe-3.2.1]# /usr/local/nagios/libexec/check_nrpe -H 192.168.146.128 NRPE v3.2.1
測試插件和NRPE
[root@localhost nrpe-nrpe-3.2.1]# vi /usr/local/nagios/etc/nrpe.cfg command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20 [root@localhost nrpe-nrpe-3.2.1]# /usr/local/nagios/libexec/check_nrpe -H 127.0.0.1 -c check_load WARNING - load average: 0.06, 0.06, 0.09|load1=0.060;0.150;0.300;0; load5=0.060;0.100;0.250;0; load15=0.090;0.050;0.200;0; [root@localhost ~]# netstat -tnlp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1062/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1372/master tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 60275/nrpe tcp6 0 0 :::80 :::* LISTEN 57918/httpd tcp6 0 0 :::22 :::* LISTEN 1062/sshd tcp6 0 0 ::1:25 :::* LISTEN 1372/master tcp6 0 0 :::5666 :::* LISTEN 60275/nrpe
5、安裝PNP插件（監控功能通過插件完成）
可參考：https://www.cnblogs.com/caoguo/p/5022230.html
[root@localhost ~]# yum -y install rrdtool librrds-perl perl-rrdtool -y [root@localhost ~]# tar zxvf pnp4nagios-0.6.26.tar.gz [root@localhost ~]# cd pnp4nagios-0.6.26 [root@localhost pnp4nagios-0.6.26]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios [root@localhost pnp4nagios-0.6.26]# make all [root@localhost pnp4nagios-0.6.26]# make install [root@localhost pnp4nagios-0.6.26]# make install-webconf [root@localhost pnp4nagios-0.6.26]# make install-config [root@localhost pnp4nagios-0.6.26]# make install-init [root@localhost pnp4nagios-0.6.26]# cd ./sample-config [root@localhost pnp4nagios-0.6.26]# make install-webconf
配置pnp4nagios
[root@localhost pnp4nagios-0.6.26]# cd /usr/local/pnp4nagios/etc/ [root@localhost etc]# mv misccommands.cfg-sample misccommands.cfg [root@localhost etc]# mv rra.cfg-sample rra.cfg [root@localhost etc]# mv nagios.cfg-sample nagios.cfg [root@localhost etc]# cd pages/ [root@localhost pages]# mv web_traffic.cfg-sample web_traffic.cfg [root@localhost pages]# cd ../check_commands/ [root@localhost check_commands]# mv check_all_local_disks.cfg-sample check_all_local_disks.cfg [root@localhost check_commands]# mv check_nrpe.cfg-sample check_nrpe.cfg [root@localhost check_commands]# mv check_nwstat.cfg-sample check_nwstat.cfg [root@localhost check_commands]# /etc/init.d/npcd start [root@localhost check_commands]# chkconfig npcd on 配置Nagios數據輸出接口(以BULK模式運行)詳情參考官網https://docs.pnp4nagios.org/pnp-0.6/config#bulk_mode：
[root@localhost ~]# vi /usr/local/nagios/etc/nagios.cfg process_performance_data=1 #默認爲0，修改爲1 並在該文件中添加下面的內容 # # service performance data # service_perfdata_file=/usr/local/pnp4nagios/var/service-perfdata service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$ service_perfdata_file_mode=a service_perfdata_file_processing_interval=15 service_perfdata_file_processing_command=process-service-perfdata-file # # host performance data starting with Nagios 3.0 # host_perfdata_file=/usr/local/pnp4nagios/var/host-perfdata host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$ host_perfdata_file_mode=a host_perfdata_file_processing_interval=15 host_perfdata_file_processing_command=process-host-perfdata-file
配置command.cfg：
[root@localhost ~]# vi /usr/local/nagios/etc/objects/commands.cfg
在該文件中添加下面的內容
define command{
command_name process-service-perfdata-file
command_line /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/service-perfdata
}
define command{
command_name process-host-perfdata-file
command_line /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/host-perfdata
}在模板配置文件中添加圖表圖標模板：
[root@localhost ~]# vi /usr/local/nagios/etc/objects/templates.cfg
在該文件中添加下面的內容
define host {
name host-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
register 0
}
define service {
name service-pnp
action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
register 0
}在監控主機和服務中調用圖表模板（在主機和服務後面添加新的模板）：
[root@localhost ~]# vi /usr/local/nagios/etc/objects/localhost.cfg
按下面的內容修改（不是添加）該文件
define host{
use linux-server,host-pnp
host_name localhost
alias localhost
address 127.0.0.1
}
define service{
use local-service,service-pnp
host_name localhost
service_description PING
check_command check_ping!100.0,20%!500.0,60%
}
define service{
use local-service,service-pnp
host_name localhost
service_description Root Partition
check_command check_local_disk!20%!10%!/
}重啓nagios和apache：
[root@localhost ~]# systemctl restart nagios.service [root@localhost ~]# systemctl restart httpd.service
訪問nagios界面即可看到圖表小圖標：
要全綠色，不綠色就按照提示解決。
[root@localhost check_commands]# mv /usr/local/pnp4nagios/share/install.php /tmp/
全綠色後刷新，正常如下：
監控本機
==============================================================================
[root@localhost ~]# cd /usr/local/nagios/etc/objects
[root@localhost ~]# vim localhost.cfg
define host{
use linux-server
host_name localhost
alias localhost
address 127.0.0.1
}
# Define an optional hostgroup for Linux machines
define hostgroup{
hostgroup_name linux-servers ; The name of the hostgroup
alias Linux Servers ; Long name of the group
members localhost ; Comma separated list of hosts that belong to this group
}
# Define a service to "ftp" the local machine
define service{
use local-service ; Name of service template to use
host_name localhost
service_description FTP
check_command check_ftp
}
# Define a service to "nfs" the local machine
define service{
use local-service ; Name of service template to use
host_name localhost
service_description NFS
check_command check_tcp!2049
}監控遠程主機
==============================================================================
[root@localhost ~]# cd /usr/local/nagios/etc/objects
[root@localhost ~]# cp localhost.cfg 192.168.0.164.cfg
[root@localhost ~]# vim 192.168.0.164.cfg
define host{
use linux-server
host_name testserver
alias host196
address 192.168.0.164
}
#define hostgroup{
# hostgroup_name testserver ; The name of the hostgroup
# alias host; Long name of the group
# members localhost ; Comma separated list of hosts that belong to this group
#}
define service{
use local-service
host_name testserver
service_description PING
check_command check_ping!100.0,20%!500.0,60%
}
define service{
use local-service
host_name testserver
service_description HTTP
check_command check_http
# notifications_enabled 0
}
define service{
use local-service
host_name testserver
service_description NFS
check_command check_tcp!2049
# notifications_enabled 0
}=============================================================================
更改主配置文件
[root@localhost ~]# vim /usr/local/nagios/etc/nagios.cfg 添加一行 cfg_file=/usr/local/nagios/etc/objects/192.168.122.100.cfg 檢測新的配置文件是否正確 [root@localhost ~]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg Total Warnings: 0 Total Errors: 0 Things look okay - No serious problems were detected during the pre-flight check
重啓nagios，web登錄確認是否新增了主機。
監控本機和遠程主機參考：
https://blog.51cto.com/1585654/1386857
nagios默認不用mysql存儲，可以使用NDOUtils插件實現mysql存儲：
https://support.nagios.com/kb/article/ndoutils-installing-ndoutils-406.html