{"id":37464,"date":"2026-01-05T20:41:01","date_gmt":"2026-01-05T17:41:01","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=37464"},"modified":"2026-01-05T20:41:01","modified_gmt":"2026-01-05T17:41:01","slug":"centos-6-uzerine-nagios-kurulumu-kapsamli-bir-rehber","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/centos-6-uzerine-nagios-kurulumu-kapsamli-bir-rehber\/","title":{"rendered":"CentOS 6 \u00dczerine Nagios Kurulumu: Kapsaml\u0131 Bir Rehber"},"content":{"rendered":"<p><body><\/p>\n<h2>CentOS 6 \u00dczerine Nagios Kurulumu: Kapsaml\u0131 Bir Rehber<\/h2>\n<p>G\u00fcn\u00fcm\u00fcz\u00fcn karma\u015f\u0131k BT altyap\u0131lar\u0131nda sistemlerin ve a\u011f hizmetlerinin kesintisiz \u00e7al\u0131\u015fmas\u0131 hayati \u00f6nem ta\u015f\u0131maktad\u0131r. Olas\u0131 sorunlar\u0131 \u00f6nceden tespit etmek, performans\u0131 izlemek ve hizmet kesintilerini minimuma indirmek i\u00e7in g\u00fc\u00e7l\u00fc bir izleme \u00e7\u00f6z\u00fcm\u00fcne ihtiya\u00e7 duyulur. Nagios, bu ihtiya\u00e7lar\u0131 kar\u015f\u0131lamak \u00fczere tasarlanm\u0131\u015f, a\u00e7\u0131k kaynakl\u0131 ve olduk\u00e7a pop\u00fcler bir izleme sistemidir. Bu makalede, CentOS 6 i\u015fletim sistemi \u00fczerine Nagios Core ve Nagios Plugins&#8217;in ad\u0131m ad\u0131m nas\u0131l kurulaca\u011f\u0131n\u0131, temel yap\u0131land\u0131rmalar\u0131n nas\u0131l yap\u0131laca\u011f\u0131n\u0131 ve uzaktaki Linux makinelerinin NRPE (Nagios Remote Plugin Executor) arac\u0131l\u0131\u011f\u0131yla nas\u0131l izlenece\u011fini ayr\u0131nt\u0131l\u0131 bir \u015fekilde ele alaca\u011f\u0131z.<\/p>\n<p>CentOS 6, kararl\u0131l\u0131\u011f\u0131 ve uzun s\u00fcreli deste\u011fi ile bilinen bir i\u015fletim sistemi olmas\u0131na ra\u011fmen, art\u0131k \u00f6mr\u00fcn\u00fcn sonuna gelmi\u015f ve g\u00fcvenlik g\u00fcncellemeleri almamaktad\u0131r. Bu rehber, \u00f6zellikle eski sistemlerle \u00e7al\u0131\u015fmak zorunda olan veya test ortamlar\u0131 kuran kullan\u0131c\u0131lar i\u00e7in bir referans niteli\u011findedir. Modern sistemlerde (CentOS 7\/8, Rocky Linux, AlmaLinux) kurulum s\u00fcre\u00e7leri benzer olsa da baz\u0131 paket isimleri ve sistem y\u00f6netimi komutlar\u0131nda farkl\u0131l\u0131klar olabilir. Ancak Nagios&#8217;un temel mant\u0131\u011f\u0131 ve yap\u0131land\u0131rma felsefesi b\u00fcy\u00fck \u00f6l\u00e7\u00fcde ayn\u0131 kalmaktad\u0131r.<\/p>\n<h3>Nagios Nedir ve Neden Kullan\u0131l\u0131r?<\/h3>\n<p>Nagios, sunucular\u0131, a\u011f cihazlar\u0131n\u0131, uygulamalar\u0131 ve hizmetleri izlemek i\u00e7in tasarlanm\u0131\u015f g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. Temel amac\u0131, altyap\u0131n\u0131zdaki potansiyel sorunlar\u0131 hen\u00fcz kullan\u0131c\u0131lar\u0131 etkilemeden \u00f6nce tespit etmenizi sa\u011flamakt\u0131r. Nagios&#8217;un ba\u015fl\u0131ca \u00f6zellikleri ve faydalar\u0131 \u015funlard\u0131r:<\/p>\n<ul>\n<li><strong>Kapsaml\u0131 \u0130zleme:<\/strong> CPU kullan\u0131m\u0131, bellek, disk alan\u0131, a\u011f trafi\u011fi, \u00e7al\u0131\u015fan s\u00fcre\u00e7ler gibi sunucu kaynaklar\u0131n\u0131 izler. HTTP, HTTPS, FTP, SSH, SMTP, POP3, IMAP gibi a\u011f hizmetlerinin durumunu kontrol eder.<\/li>\n<li><strong>Uyar\u0131 Mekanizmalar\u0131:<\/strong> Tan\u0131mlanan e\u015fik de\u011ferleri a\u015f\u0131ld\u0131\u011f\u0131nda veya bir hizmet \u00e7\u00f6kt\u00fc\u011f\u00fcnde e-posta, SMS veya \u00f6zel betikler arac\u0131l\u0131\u011f\u0131yla y\u00f6neticilere uyar\u0131 g\u00f6nderir.<\/li>\n<li><strong>Geni\u015fletilebilirlik:<\/strong> Binlerce topluluk taraf\u0131ndan geli\u015ftirilmi\u015f eklenti (plugin) sayesinde hemen hemen her \u015feyi izleyebilir. Kendi \u00f6zel izleme betiklerinizi kolayca entegre edebilirsiniz.<\/li>\n<li><strong>Raporlama:<\/strong> Hizmet kesintileri, performans verileri ve olay ge\u00e7mi\u015fi hakk\u0131nda detayl\u0131 raporlar sunar.<\/li>\n<li><strong>\u00d6zelle\u015ftirilebilir Kontrol Paneli:<\/strong> Web tabanl\u0131 aray\u00fcz\u00fc sayesinde t\u00fcm izlenen sistemlerin ve hizmetlerin durumunu tek bir yerden g\u00f6r\u00fcnt\u00fcleyebilirsiniz.<\/li>\n<\/ul>\n<h3>\u00d6n Gereksinimler<\/h3>\n<p>Nagios kurulumuna ba\u015flamadan \u00f6nce a\u015fa\u011f\u0131daki \u00f6n gereksinimlerin kar\u015f\u0131land\u0131\u011f\u0131ndan emin olunuz:<\/p>\n<ul>\n<li><strong>\u0130\u015fletim Sistemi:<\/strong> CentOS 6 y\u00fckl\u00fc bir sunucu. Minimal kurulum yeterlidir.<\/li>\n<li><strong>Kullan\u0131c\u0131 Yetkileri:<\/strong> Root eri\u015fimi veya sudo yetkilerine sahip bir kullan\u0131c\u0131.<\/li>\n<li><strong>\u0130nternet Ba\u011flant\u0131s\u0131:<\/strong> Gerekli paketleri ve Nagios kaynak dosyalar\u0131n\u0131 indirmek i\u00e7in aktif internet ba\u011flant\u0131s\u0131.<\/li>\n<li><strong>Temel Linux Bilgisi:<\/strong> Komut sat\u0131r\u0131 kullan\u0131m\u0131, dosya d\u00fczenleme ve servis y\u00f6netimi hakk\u0131nda temel bilgi.<\/li>\n<li><strong>Kaynaklar:<\/strong> Minimum 1GB RAM ve 10GB disk alan\u0131 tavsiye edilir (izlenecek cihaz say\u0131s\u0131na g\u00f6re artabilir).<\/li>\n<\/ul>\n<h3>Ad\u0131m 1: Sistem G\u00fcncelleme ve Gerekli Paketlerin Kurulumu<\/h3>\n<p>Kuruluma ba\u015flamadan \u00f6nce sistemin g\u00fcncel oldu\u011fundan ve Nagios ile eklentileri derlemek i\u00e7in gerekli t\u00fcm geli\u015ftirme ara\u00e7lar\u0131n\u0131n ve k\u00fct\u00fcphanelerin y\u00fckl\u00fc oldu\u011fundan emin olmal\u0131y\u0131z.<\/p>\n<h4>Sistem G\u00fcncellemesi<\/h4>\n<p>Sisteminizi en son paketlerle g\u00fcncelleyin:<\/p>\n<pre><code>yum update -y<\/code><\/pre>\n<h4>Geli\u015ftirme Ara\u00e7lar\u0131 ve Ba\u011f\u0131ml\u0131l\u0131klar<\/h4>\n<p>Nagios&#8217;u kaynak koddan derleyece\u011fimiz i\u00e7in derleyici (GCC), make ve di\u011fer geli\u015ftirme ara\u00e7lar\u0131na ihtiyac\u0131m\u0131z var. Ayr\u0131ca Nagios web aray\u00fcz\u00fc i\u00e7in Apache web sunucusu (httpd), PHP ve GD grafik k\u00fct\u00fcphaneleri de gereklidir.<\/p>\n<pre><code>yum install -y httpd php gcc glibc glibc-common gd gd-devel make net-snmp openssl-devel xinetd unzip<\/code><\/pre>\n<ul>\n<li><code>httpd<\/code>: Apache web sunucusu.<\/li>\n<li><code>php<\/code>: Nagios web aray\u00fcz\u00fc i\u00e7in gereklidir.<\/li>\n<li><code>gcc<\/code>, <code>glibc<\/code>, <code>glibc-common<\/code>, <code>make<\/code>: Derleme ara\u00e7lar\u0131 ve temel k\u00fct\u00fcphaneler.<\/li>\n<li><code>gd<\/code>, <code>gd-devel<\/code>: Nagios web aray\u00fcz\u00fcndeki grafikler i\u00e7in GD k\u00fct\u00fcphanesi.<\/li>\n<li><code>net-snmp<\/code>: SNMP tabanl\u0131 izleme i\u00e7in (iste\u011fe ba\u011fl\u0131 ama faydal\u0131).<\/li>\n<li><code>openssl-devel<\/code>: SSL\/TLS deste\u011fi i\u00e7in geli\u015ftirme k\u00fct\u00fcphaneleri.<\/li>\n<li><code>xinetd<\/code>: NRPE (Nagios Remote Plugin Executor) i\u00e7in kullan\u0131lacak s\u00fcper sunucu.<\/li>\n<li><code>unzip<\/code>: S\u0131k\u0131\u015ft\u0131r\u0131lm\u0131\u015f dosyalar\u0131 a\u00e7mak i\u00e7in.<\/li>\n<\/ul>\n<h4>SELinux ve G\u00fcvenlik Duvar\u0131 Yap\u0131land\u0131rmas\u0131<\/h4>\n<p>CentOS sistemlerinde SELinux ve g\u00fcvenlik duvar\u0131 (iptables) Nagios&#8217;un \u00e7al\u0131\u015fmas\u0131n\u0131 engelleyebilir. Kurulumu basitle\u015ftirmek ad\u0131na, test ortamlar\u0131nda SELinux&#8217;u ge\u00e7ici olarak devre d\u0131\u015f\u0131 b\u0131rakabilir veya izinlerini d\u00fczenleyebilirsiniz. \u00dcretim ortamlar\u0131nda ise gerekli izinleri sa\u011flaman\u0131z \u00f6nerilir.<\/p>\n<h5>SELinux&#8217;u Devre D\u0131\u015f\u0131 B\u0131rakma (Ge\u00e7ici)<\/h5>\n<pre><code>setenforce 0<\/code><\/pre>\n<h5>SELinux&#8217;u Kal\u0131c\u0131 Olarak Devre D\u0131\u015f\u0131 B\u0131rakma<\/h5>\n<p><code>\/etc\/selinux\/config<\/code> dosyas\u0131n\u0131 d\u00fczenleyin ve <code>SELINUX=enforcing<\/code> sat\u0131r\u0131n\u0131 <code>SELINUX=disabled<\/code> olarak de\u011fi\u015ftirin. Ard\u0131ndan sistemi yeniden ba\u015flatman\u0131z gerekir.<\/p>\n<pre><code>sed -i 's\/SELINUX=enforcing\/SELINUX=disabled\/g' \/etc\/selinux\/config\nreboot<\/code><\/pre>\n<h5>G\u00fcvenlik Duvar\u0131 (iptables) Yap\u0131land\u0131rmas\u0131<\/h5>\n<p>Nagios web aray\u00fcz\u00fcne eri\u015fim sa\u011flamak i\u00e7in HTTP (port 80) ve HTTPS (port 443) portlar\u0131n\u0131 g\u00fcvenlik duvar\u0131nda a\u00e7mal\u0131s\u0131n\u0131z.<\/p>\n<pre><code>iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT\niptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT\nservice iptables save\nservice iptables restart<\/code><\/pre>\n<h3>Ad\u0131m 2: Nagios Kullan\u0131c\u0131s\u0131 ve Grubu Olu\u015fturma<\/h3>\n<p>G\u00fcvenlik ve yetkilendirme amac\u0131yla Nagios&#8217;un kendi \u00f6zel kullan\u0131c\u0131s\u0131 ve grubu alt\u0131nda \u00e7al\u0131\u015fmas\u0131 \u00f6nerilir. Ayr\u0131ca Apache web sunucusunun da Nagios komut dosyalar\u0131na eri\u015febilmesi i\u00e7in ayn\u0131 gruba dahil edilmesi gerekir.<\/p>\n<pre><code>useradd nagios\ngroupadd nagcmd\nusermod -a -G nagcmd nagios\nusermod -a -G nagcmd apache<\/code><\/pre>\n<ul>\n<li><code>nagios<\/code>: Nagios servisinin \u00e7al\u0131\u015faca\u011f\u0131 kullan\u0131c\u0131.<\/li>\n<li><code>nagcmd<\/code>: Nagios komut dosyalar\u0131na eri\u015fimi kontrol eden grup.<\/li>\n<li><code>apache<\/code>: Apache web sunucusu kullan\u0131c\u0131s\u0131.<\/li>\n<\/ul>\n<h3>Ad\u0131m 3: Nagios Core ve Eklentilerini \u0130ndirme<\/h3>\n<p>Nagios Core ve Nagios Plugins&#8217;in en son kararl\u0131 s\u00fcr\u00fcmlerini resmi Nagios web sitesinden indirmeniz gerekmektedir. \u0130ndirme i\u015flemini genellikle <code>\/usr\/local\/src<\/code> dizininde yapar\u0131z.<\/p>\n<pre><code>cd \/usr\/local\/src\nwget https:\/\/assets.nagios.com\/downloads\/nagioscore\/releases\/nagios-4.4.6.tar.gz  # En son s\u00fcr\u00fcm\u00fc kontrol edin (\u00d6rn: https:\/\/www.nagios.org\/downloads\/nagios-core\/ adresinden en g\u00fcncel s\u00fcr\u00fcm\u00fc al\u0131n)\nwget https:\/\/nagios-plugins.org\/download\/nagios-plugins-2.3.3.tar.gz             # En son s\u00fcr\u00fcm\u00fc kontrol edin (\u00d6rn: https:\/\/www.nagios.org\/downloads\/nagios-plugins\/ adresinden en g\u00fcncel s\u00fcr\u00fcm\u00fc al\u0131n)<\/code><\/pre>\n<p>\u0130ndirilen dosyalar\u0131 ar\u015fivden \u00e7\u0131kar\u0131n:<\/p>\n<pre><code>tar -xzf nagios-4.4.6.tar.gz\ntar -xzf nagios-plugins-2.3.3.tar.gz<\/code><\/pre>\n<h3>Ad\u0131m 4: Nagios Core&#8217;u Derleme ve Kurma<\/h3>\n<p>\u015eimdi Nagios Core kaynak kodunu derleyip sistemimize kuraca\u011f\u0131z. Bu ad\u0131mda bir\u00e7ok <code>make install-*<\/code> komutu kullanarak Nagios&#8217;un farkl\u0131 bile\u015fenlerini kuruyoruz.<\/p>\n<pre><code>cd \/usr\/local\/src\/nagios-4.4.6\n.\/configure --with-command-group=nagcmd\nmake all\nmake install\nmake install-init\nmake install-config\nmake install-commandmode\nmake install-webconf<\/code><\/pre>\n<ul>\n<li><code>.\/configure --with-command-group=nagcmd<\/code>: Nagios&#8217;u, harici komut dosyalar\u0131na <code>nagcmd<\/code> grubunun eri\u015febilece\u011fi \u015fekilde yap\u0131land\u0131r\u0131r.<\/li>\n<li><code>make all<\/code>: Ana program\u0131, CGI&#8217;lar\u0131 ve HTML dosyalar\u0131n\u0131 derler.<\/li>\n<li><code>make install<\/code>: Ana program\u0131, CGI&#8217;lar\u0131 ve HTML dosyalar\u0131n\u0131 kurar.<\/li>\n<li><code>make install-init<\/code>: Nagios&#8217;un sistem ba\u015flang\u0131c\u0131nda otomatik olarak ba\u015flamas\u0131 i\u00e7in init beti\u011fini kurar.<\/li>\n<li><code>make install-config<\/code>: \u00d6rnek yap\u0131land\u0131rma dosyalar\u0131n\u0131 kurar. Bu dosyalar \u00fczerinde de\u011fi\u015fiklik yapaca\u011f\u0131z.<\/li>\n<li><code>make install-commandmode<\/code>: Harici komut dosyalar\u0131n\u0131n do\u011fru izinlere sahip olmas\u0131n\u0131 sa\u011flar.<\/li>\n<li><code>make install-webconf<\/code>: Apache i\u00e7in Nagios web aray\u00fcz\u00fc yap\u0131land\u0131rma dosyas\u0131n\u0131 kurar.<\/li>\n<\/ul>\n<h3>Ad\u0131m 5: Nagios Web Aray\u00fcz\u00fc Yap\u0131land\u0131rmas\u0131<\/h3>\n<p>Nagios web aray\u00fcz\u00fcne eri\u015fim i\u00e7in bir y\u00f6netici kullan\u0131c\u0131s\u0131 olu\u015fturmal\u0131 ve Apache&#8217;yi yap\u0131land\u0131rmal\u0131y\u0131z.<\/p>\n<h4>Web Aray\u00fcz\u00fc \u0130\u00e7in Y\u00f6netici Kullan\u0131c\u0131s\u0131 Olu\u015fturma<\/h4>\n<p>Nagios web aray\u00fcz\u00fcne giri\u015f yapmak i\u00e7in <code>nagiosadmin<\/code> ad\u0131nda bir kullan\u0131c\u0131 ve \u015fifre olu\u015fturun. \u015eifreyi g\u00fcvenli bir \u015fekilde belirleyin.<\/p>\n<pre><code>htpasswd -c \/usr\/local\/nagios\/etc\/htpasswd.users nagiosadmin<\/code><\/pre>\n<p>Sizden <code>nagiosadmin<\/code> kullan\u0131c\u0131s\u0131 i\u00e7in bir \u015fifre girmeniz ve onaylaman\u0131z istenecektir.<\/p>\n<h4>Apache&#8217;yi Ba\u015flatma ve Ba\u015flang\u0131ca Ekleme<\/h4>\n<p>Apache web sunucusunu ba\u015flat\u0131n ve sistem ba\u015flang\u0131c\u0131nda otomatik olarak \u00e7al\u0131\u015fmas\u0131 i\u00e7in yap\u0131land\u0131r\u0131n:<\/p>\n<pre><code>service httpd start\nchkconfig httpd on<\/code><\/pre>\n<h4>Apache Yap\u0131land\u0131rma Dosyas\u0131n\u0131 Kontrol Etme<\/h4>\n<p><code>make install-webconf<\/code> komutu, Apache i\u00e7in <code>\/etc\/httpd\/conf.d\/nagios.<\/p>\n","protected":false},"excerpt":{"rendered":"CentOS 6 \u00dczerine Nagios Kurulumu: Kapsaml\u0131 Bir Rehber\nG\u00fcn\u00fcm\u00fcz\u00fcn karma\u015f\u0131k BT altyap\u0131lar\u0131nda sistemlerin ve a\u011f hizmetlerinin kesintisiz \u00e7a","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[241],"tags":[],"class_list":{"0":"post-37464","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-linux","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - 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