Prerequisites
Compiler:
yum install httpd php gcc glibc glibc-common gd gd-devel make net-snmp net-snmp-utils unzip
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
Installation
For RHEL/CentOS users:
./configure --with-command-group=nagcmd
For Ubuntu users:
./configure --with-command-group=nagcmd -–with-mail=/usr/bin/sendmail --with-httpd-conf=/etc/apache2/
All systems:
make all make install make install-init make install-config make install-commandmode make install-webconf cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/ chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
For Ubuntu users:
sudo a2ensite nagios sudo a2enmod rewrite cgi
For RHEL/CentOS users:
/etc/init.d/nagios start /etc/init.d/httpd start or service httpd start
For Ubuntu users using
systemd : sudo cp /etc/init.d/skeleton /etc/init.d/nagios sudo vi /etc/init.d/nagios (and add the following lines) DESC="Nagios" NAME=nagios DAEMON=/usr/local/nagios/bin/$NAME DAEMON_ARGS="-d /usr/local/nagios/etc/nagios.cfg" PIDFILE=/usr/local/nagios/var/$NAME.lock systemctl restart apache2 systemctl start nagios
Create a Default User for Web Access.
Add a default user for Web Interface Access:
htpasswd –c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Nagios Plugin Installation
cd /tmp/nagios-plugins-2.2.0 ./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_script_exec_t /usr/local/nagios/sbin/
chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/
chcon -R -t httpd_sys_content_t /usr/local/nagios/share/
Test:
Restart the nagios and httpd service:
sudo service nagios restart sudo service httpd restart
enter url: ip_address/nagios