{"id":5628,"date":"2018-12-11T15:58:23","date_gmt":"2018-12-11T15:58:23","guid":{"rendered":"https:\/\/www.appservgrid.com\/paw92\/?p=5628"},"modified":"2018-12-28T20:05:28","modified_gmt":"2018-12-28T20:05:28","slug":"how-to-install-and-configure-nagios-on-centos-7","status":"publish","type":"post","link":"https:\/\/www.appservgrid.com\/paw92\/index.php\/2018\/12\/11\/how-to-install-and-configure-nagios-on-centos-7\/","title":{"rendered":"How To Install and Configure Nagios on CentOS 7"},"content":{"rendered":"

Nagios is one of the most popular open source monitoring systems. Nagios keeps an inventory of your entire IT infrastructure and ensures your networks, servers, applications, services, and processes are up and running. In case of failure or suboptimal performance Nagios will send notification alerts via various methods.<\/p>\n

This tutorial describes how to install and configure Nagios Core on a CentOS 7 server.<\/p>\n

Prerequisites<\/h2>\n

Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges<\/a>.<\/p>\n

Disable SELinux or set in permissive mode as instructed here<\/a>.<\/p>\n

Update your CentOS system and install Apache<\/a>, PHP<\/a> and all the packages necessary to download and compile the Nagios main application and Nagios plugins:<\/p>\n

sudo yum update
\nsudo yum install httpd php php-cli gcc glibc glibc-common gd gd-devel net-snmp openssl-devel wget
\nsudo yum install make gettext autoconf net-snmp-utils epel-release perl-Net-SNMP postfix unzip automake<\/p>\n

Installing Nagios on CentOS<\/h2>\n

Perform the following steps to install the latest version of Nagios Core from source.<\/p>\n

1. Downloading Nagios<\/h3>\n

We\u2019ll download Nagios source in the \/usr\/src directory which is the common location to place source files.<\/p>\n

Navigate to the directory with:<\/p>\n

Download the latest version of Nagios from the project Github repository<\/a> using the following wget command<\/a>:<\/p>\n

sudo wget https:\/\/github.com\/NagiosEnterprises\/nagioscore\/archive\/nagios-4.4.2.tar.gz<\/p>\n

Once the download is complete extract the tar file<\/a> with:<\/p>\n

sudo tar zxf nagios-*.tar.gz<\/p>\n

Before continuing with the next steps, make sure you change to the Nagios source directory by typing:<\/p>\n

2. Compiling Nagios<\/h3>\n

To start the build process run the configure script which will perform a number of checks to make sure all of the dependencies on your system are present:<\/p>\n

Upon successful completion, the following message will be printed on your screen:<\/p>\n

*** Configuration summary for nagios 4.4.2 2018-08-16 ***:<\/p>\n

General Options:
\n————————-
\nNagios executable: nagios
\nNagios user\/group: nagios,nagios
\nCommand user\/group: nagios,nagios
\nEvent Broker: yes
\nInstall $: \/usr\/local\/nagios
\nInstall $: \/usr\/local\/nagios\/include\/nagios
\nLock file: \/run\/nagios.lock
\nCheck result directory: \/usr\/local\/nagios\/var\/spool\/checkresults
\nInit directory: \/lib\/systemd\/system
\nApache conf.d directory: \/etc\/httpd\/conf.d
\nMail program: \/sbin\/sendmail
\nHost OS: linux-gnu
\nIOBroker Method: epoll<\/p>\n

Web Interface Options:
\n————————
\nHTML URL: http:\/\/localhost\/nagios\/
\nCGI URL: http:\/\/localhost\/nagios\/cgi-bin\/
\nTraceroute (used by WAP): \/bin\/traceroute<\/p>\n

Review the options above for accuracy. If they look okay,
\ntype ‘make all’ to compile the main program and CGIs.<\/p>\n

Start the compilation process using the make command:<\/p>\n

The compilation may take some time, depending on your system. Once the build process is completed, the following message will be printed on your screen:<\/p>\n

….
\n*** Compile finished ***
\n…
\nFor more information on obtaining support for Nagios, visit:<\/p>\n

Nagios Support Home<\/a><\/p><\/blockquote>\n