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Lesson1 Nagios Core Basics Master Network Monitoring RHEL9
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A tutorial on how to configure Nagios Core server and clients (Linux and Windows). Nagios Core is a monitoring and alerting software package that notify system administrators of any system or server issues. • Download Nagios Core: http://nag.is/coresys • Download Nagios XI: http://nag.is/xisys • Download Nagios Plugins: http://nag.is/plugsys • Website: https://www.nagios.com • WATCH PART 2: • Nagios Core Part 2: Client (Linux W... • Thank you for watching!! Please let me know how you are using Nagios XI or Core in your environment. • Please subscribe to get updates on new videos :) • • Twitter: sysadmgirl • Facebook: sysadmgirl • • Prerequisites • yum install httpd php gcc glibc glibc-common gd gd-devel • Accounts: • /usr/sbin/useradd -m nagios • passwd nagios • /usr/sbin/groupadd nagcmd # Used for Web Interface • /usr/sbin/usermod -a -G nagcmd nagios • /usr/sbin/usermod -a -G nagcmd apache • Download source code • wget https://sourceforge.net/projects/nagi... • wget http://www.nagios-plugins.org/downloa... • Extract the Nagios source code tarball. • tar -xvzf nagios-4.1.1.tar.gz • cd nagios-4.1.1 • Run the Nagios configure and compile source code • ./configure --with-command-group=nagcmd • make all • make install • make install-init • make install-config • make install-commandmode • vi /usr/local/nagios/etc/objects/contacts.cfg • Change email address assoicated with install • Nagios web config file • make install-webconf • nagiosadmin account for Nagios web interface • htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin • service httpd restart • Install the Nagios Plugins • tar xzf nagios-plugins-2.1.1.tar.gz • cd nagios-plugins-2.1.1 • ./configure --with-nagios-user=nagios --with-nagios-group=nagios • make • make install • Add Nagios services • chkconfig --add nagios • chkconfig nagios on • Verify the sample Nagios configuration files. • /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg • service nagios start • • Check SELinux • getenforce • Change to permissive mode. • setenforce 0 • Modifiy /etc/selinux/config for system to remain in permission mode • OR modifiy selinux permissions to allow nagios • chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/ • chcon -R -t httpd_sys_content_t /usr/local/nagios/share/ • Log into Nagios web interface • username: nagiosadmin • password: set with htpasswd util • http://localhost/nagios/ • iptables • modify /etc/sysconfig/iptables to allow 80 443
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