How to Install Nagios 4.4.9 On RHEL / ROCKY LINUX / ALMALINUX 8

Nagios Center is an open source IT foundation checking and cautioning stage fabricated utilizing PHP. It is utilized for observing strategic IT framework parts like organization foundation, servers, network conventions, framework measurements, applications, and administrations.

Also, Nagios Center backings cautioning (when basic foundation parts come up short and recuperate), through email, SMS, or custom content, and announcing of the verifiable record of occasions, blackouts, warnings, and ready reaction for later investigation.

Critically, Nagios Center boats with different Programming interface's that furnish coordination with existing or outsider applications as well as local area created additional items.

This article will walk you through the most common way of introducing Nagios Center 4.4.6 and Nagios Modules 2.3.3 in RHEL 8 Linux conveyance.

To introduce Nagios Center bundle from sources, you really want to introduce following conditions including Apache HTTP server and PHP utilizing the default dnf bundle director.

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Change Hostname 

hostnamectl set-hostname svr-nagios

Configure static IP Address 

nano /etc/sysconfig/network-scripts/ifcfg-enp0s17

 reboot and login to your server again

Next handicap SELinux which is in implementing mode as a matter of course or you can set it in tolerant mode.

sed -i 's/SELINUX=.*/SELINUX=permissive/g' /etc/selinux/config

setenforce 0

Then, begin the HTTPD administration for the present, empower it to naturally begin at framework boot and check its status utilizing the systemctl orders.

dnf install -y gcc glibc glibc-common perl httpd php wget gd gd-devel nano openssl-devel make gettext automake autoconf net-snmp net-snmp-utils

systemctl start httpd 

systemctl enable httpd

Presently download the Nagios Center source bundle utilizing wget order, separate it and move into the removed registry as displayed.

wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.4.9.tar.gz

tar -zxvf nagios-4.4.9.tar.gz

cd nagios-4.4.9

run the accompanying orders to arrange the source bundle and assemble it.

./configure

make all

After that make the Nagios Client and Gathering, and add the Apache client to the Nagios Gathering as follows.

make install-groups-users

usermod -aG nagios apache

Presently introduce the double records, CGIs, and HTML documents with utilizing the accompanying orders.

make install

make install-init

run the accompanying orders to introduce and design the outside order record, an example setup document and the Apache-Nagios design record.

make install-commandmode

make install-config

make install-webconf

In this step, you want to get the Nagios Center web console utilizing HTTP fundamental validation. Thus, you'll have to make an Apache client record to have the option to sign into Nagios - this record will go about as the Nagios Head account.

htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

you really want to introduce important Nagios modules. Yet, before you download and introduce the Nagios modules, you want to introduce the necessary bundles for accumulating and constructing the module bundle.

dnf install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils

Then download and remove the most recent form of the Nagios Modules utilizing the accompanying orders.

cd

wget https://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz

tar -zxvf nagios-plugins-2.3.3

cd nagios-plugins-2.3.3

Move into the extricated index, aggregate, form and introduce the Nagios Modules introduce the Nagios Modules as follows.

./configure

make

make install

Right now, you have set up the Nagios Center assistance and designed it to work with the Apache HTTP server. Presently you want to restart the HTTPD administration. Additionally, begin and empower the Nagios administration and check in the event that it is going as follows.

systemctl restart httpd

systemctl start nagios 

systemctl enable nagios 

In the event that you have firewall running, you want to open port 80 in the firewall.

firewall-cmd --permanent --zone=public --add-port=80/tcp 

firewall-cmd --reload

In this last step, you can now get to the Nagios web console. Open your internet browser and guide it toward Nagios Center web index, for instance (supplant the IP address or FDQN with your own qualities).

http://youripaddress/nagios

Login

username : nagiosadmin

password : yourpassword

Congrats! You have effectively introduced Nagios Center on your RHEL 8 server. Assuming you have any inquiries, utilize the input structure beneath to contact us.