It is a network monitoring tool that helps you to monitor your network status.
Icinga gets data and after various performance give you status over Internet anywhere.

So, in this lecture we will cover the installation of Icinga 2.

First of all make sure you’ve root privileges.

$ sudo su –

As it depends upon other packages. So, configure EPEL repository on Centos 8 / RHEL 8.

rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

Also enable the optional & extra repositories.

subscription-manager repos –enable rhel-8-server-optional-rpms
subscription-manager repos –enable rhel-8-server-extras-rpms

Adding Icinga 2 Repository

Now, add Icinga 2 repository.

rpm –import https://package.icinga.com/icinga.key
yum install https://package.icinga.com/epel/icinga-rpm-release-8-latest.noarch.rpm

Installing Icinga 2

yum -y install icinga2

Start and enable Icinga Services.

systemctl start icinga2

systemctl enable icinga2

SELinux

Make sure you’ve installed SELinux.

Now install the given package for targeted policy.

yum install -y icinga2-selinux

Plugin is necessary for monitoring. So install Nagios Plugin.

Installing Nagios Plugin

yum -y install nagios-plugins-all

Configuring DB IDO MySQL

DB IDO helps to export all the configuration & status information to database. So, we must have DB server.

If you’ve already installed then skip the below step.

yum -y install mariadb-server mariadb

Now, start and enable MariaDB services.

systemctl start mariadb

systemctl enable mariadb

Make sure to Secure your MariaDB installation.

Installing IDO modules for MySQL

Now install IDO modules for MySQL

yum -y install icinga2-ido-mysql

Creating Database for Icinga2

Now create a Database after logging as a root user. It will help you to set up web interface.

mysql -u -root -p

CREATE DATABASE icinga2;

GRANT ALL PRIVILEGES ON icinga2.* to icinga2@localhost IDENTIFIED BY ‘icinga123’;
FLUSH PRIVILEGES;
quit

Now import the Icinga 2 IDO schema by running this command

mysql -u -root -p icinga2 < /usr/share/icinga2-ido-mysql/schema/mysql.sql

Enabling IDO MySQL Modules

Now, Enable IDO MYSQL modules.

icinga2 feature list

Output:

Disabled features: api command compatlog elasticsearch gelf graphite influxdb livestatus opentsdb perfdata statusdata syslog
Enabled features: checker ido-mysql mainlog notification

You can see that ido-mysql is already enabled.
If not enabled you can do it by this command.

icinga2 feature enable ido-mysql

For smooth performance, you can also enable command feature.

icinga2 feature enable command

Configuration of IDO DB MySQL module

After enabling IDO module icinga2 changes the file path to /etc/icinga2/features-enabled/ido-mysql.conf.
You can set up DB manually.

vi /etc/icinga2/features-enabled/ido-mysql.conf

Provide your details according to your own requirements.
Now restart icinga2 services.

systemctl restart icinga2

Make sure icinga2 is running.

systemctl status icinga2.

Firewall

If firewall blocks you, give permissions to disable it.

firewall-cmd –permanent –add-port=5665/tcp
firewall-cmd –reload You’ve all done we will cover the web configuration of Icinga 2 in next tutorial.
READ: How to Setup Icinga 2 Web interface on Centos / RHEL 8.

The post How to Install Icinga 2 on Centos / RHEL 8 appeared first on Linux Windows and android Tutorials.

• Web Server
• PHP 5.6.0 and above with cURL, gettext,intl,mbstring,OpenSSL, and XML support.
• LDAP libray(PHP) or Active Directory Authentication.
• PHP libraries for MySQL or PostgreSQL

Installing PHP and its Extensions

As stated above you must have PHP version 5.6 or above. You should consider the latest version available on Centos / Redhat base repositories. You would need to enable SCL repository and server respectively.
For Centos

yum install -y centos-release-scl

For RHEL

subscription-manager repos –enable rhel-8-server-optional-rpms
subscription-manager repos –enable rhel-server-rhscl-7-rpms

For Centos

 yum -y install rh-php71-php-json rh-php71-php-pgsql rh-php71-php-xml rh-php71-php-intl rh-php71-php-common rh-php71-php-pdo rh-php71-php-mysqlnd rh-php71-php-cli rh-php71-php-mbstring rh-php71-php-fpm rh-php71-php-gd rh-php71-php-zip rh-php71-php-ldap rh-php71-php-imagick

For RHEL

 yum -y install rh-php71-php-json rh-php71-php-pgsql rh-php71-php-xml rh-php71-php-intl rh-php71-php-common rh-php71-php-pdo rh-php71-php-mysqlnd rh-php71-php-cli rh-php71-php-mbstring rh-php71-php-fpm rh-php71-php-gd rh-php71-php-zip rh-php71-php-ldap

Make sure to configure time zone in the php.ini
Now, restart php-fpm services.
Enable Php-fpm services.

Adding Icinga2 Repository

Make sure to add Icinga2 repository if you’ve not already set up it.

rpm –import https://packages.icinga.com/icinga.key
yum install https://packages.icinga.com/epel/icinga-rpm-release-8-latest.noarch.rpm

Installing Icinga2 Web

yum command can be used on Centos/RHEL to install Icinga web package alongwith Icinga CLI & Apache server.

yum -y install icingaweb2 icingacli httpd

Enable Apache Services

systemctl enable httpd

Set up SELinux
Allow Firewall

firewall-cmd –permanent –add-service=http
firewall-cmd –reload

Prepare Icinga Web Setup

Icinga CLI is used for adminstration in command line. Icinga web and CLI must have access to logs&configuration. Add user for web server.

groupadd -r icingaweb2
usermod -a -G icingaweb2 apache

Create Icinga Web 2 configuration directory.

icingacli setup config directory –group icingaweb2

Restart Php-fpm and Apache services.

systemctl restart httpd
systemctl restart rh-php71-php-fpm

For first visit Icinga web setup wizard will guide you through all these steps for the successfull installation.

http://youripaddress/icingaweb2/setup

A token needed to be generated for security reasons. Use this command to generate token.

icingacli setup token create.

Output:
The newly generated setup token is: 04fa4ea1baf4f0b9
use token and click Next.

Choose the modules you’ve installed in Icinga 2

Next screen shows the info timezone and PHP extensions.

Check out all requirements are fulfilled.
A warning of missing PHP Image magic extensions on RHEL 8.
You can install it from Centos repository.

yum -y install http://mirror.centos.org/centos/7/sclo/x86_64/sclo/sclo-php71/sclo-php71-php-pecl-imagick-3.4.3-2.el7.x86_64.rpm
systemctl restart httpd
systemctl restart rh-php71-php-fpm

On next step create Icinga Web 2 user accoutn. Select Database and move to Next.

Login to MySQL server.

mysql -u root -p

Create Database to store Authenication Information.

CREATE DATABASE icingawebdb;
GRANT ALL privileges on icingawebdb.* to icingaweb@localhost IDENTIFIED by ‘icinga123’;
quit

Enter details to proceed.

Choose Authentication backend and move to Next step

Enter the domain account details and remember them for future use.

Select where to save the application and other details and move Next.

Review your settings on the coming screen and move Next.
Configure monitoring module for Icinga Web2. Provide required informations alongwith

Command Transport Setup

These will help you to send commands to monitoring assistances. Icinga Web supports Local Command File, Remote Command File, and Icinga 2 API as a Command Transport.
You can also design your own.
We use here Local Command file for demo. You can choose your required one.

Run the below command to set up API.

Icinga2 API

icinga2 api setup

Output:

View API user detail from /etc/icinga2/conf.d/api-users.conf file

cat /etc/icinga2/conf.d/api-users.conf

Output:

Rstart icinga2 services.

systemctl restart icinga2

Now use user & password from above file.
Make sure to protect from bad ones.

Review your configuration and you are all set up.
Click on Login to Icinga Web 2.

Now login to see dashboard.

Congratulations! you have done installing Icinga Web 2.

The post How to Setup Icinga 2 Web interface on Centos / RHEL 8. appeared first on Linux Windows and android Tutorials.

It was originally created as a fork of the Nagios system monitoring application in 2009. The Icinga developers also seek to reflect community needs more closely and to integrate patches more quickly.

Why Icinga? To gain control over the resources available on our network (Servers, Switches, Routers, etc.), which would prevent possible failures before they occur.

Some of its characteristics are:

• Performance oriented: Icinga 2 is built to be fast. Thanks to its multithreaded design, it can run thousands of checks each second without any sign of CPU strain.
• Distributed: combine high availability clusters with a distributed setup, and you have a best practice scenario for large and complex environments.
• Rule based Configuration:monitoring as code with dynamic configurations. Apply rules to hosts and services to create a continuous monitoring environment.

Installation on CentOS 7

Adding Icinga repository and installing Icinga2

There is an Icinga repository for Red Hat Linux, and therefore it is compatible with CentOS. Add the repository:

               sudo -i

Then we enter our password and we are already a root user.

After that, we wrote the following:

               yum install https://packages.icinga.com/epel/icinga-rpm-release-7-latest.noarch.rpm

For this tutorial you need to have the EPEL repository activated, if you do not have it activated you can do it with the following command:

               yum install epel-release

Once the installation process is complete, we proceed to install Icinga2:

              yum install icinga2

Once the package is installed, we proceed to start and enable the service.

             systemctl start icinga2

And:

             systemctl enable icinga2

By default, the installation of icinga2 enables three functionalities: checker, notification and maillog. With the following instruction, we can see all the features:

             icinga2 feature list

As it was said before, Icinga is a Nagios fork, bringing as an advantage the compatibility with its plugins. Thanks to the EPEL repository, it’s just a command.

              yum install nagios-plugins-all

If we manage CentOS security with the selinux control system.

             yum install icinga2-selinux

Then we must restart the service

             systemctl restart icinga2

DB IDO on Icinga2 – Installing MariaDB

Icinga2 works with a DBMS that can be either MariaDB or postgreSQL. In this case we will use MariaDB, if we don’t have it installed, we must do it:

               yum install mariadb-server mariadb

After that, we must to enable it and start it:

             systemctl enable mariadb

And:

             systemctl start mariadb

With the mysql_secure_installation script we can define the password and other options of MariaDB. We answer Y,N,Y,Y.

                mysql_secure_installation

At this point we must install the Ido-mysql module or functionality:

              yum install icinga2-ido-mysql

Now we will create the user and database dedicated to icinga2. We’re accessing the mariadb console:

mysql -u root -p

Once logged in, we proceed to create the database:

               CREATE DATABASE icinga2;

And later, we will create the user dedicated to icinga, with his password and with permissions to alter everything in the icinga2 database:

              GRANT ALL PRIVILEGES ON icinga2.* TO ‘icinga2user’@’localhost’ IDENTIFIED BY ‘icinga2pss’;

Now we must repeat the process but for icinga web:

               CREATE DATABASE icinga2web;

               GRANT ALL PRIVILEGES ON icinga2web.* TO ‘icinga2webuser’@’localhost’ IDENTIFIED BY ‘icinga2webpss’;

And finally, we must to refresh all privileges:

               FLUSH PRIVILEGES;

We leave the mariadb console with exit. And to import the mysql ido schema into our mariadb configuration, we write:

               mysql -u root -p icinga2 < /usr/share/icinga2-ido-mysql/schema/mysql.sql

We enabled the icinga2 module gone mysql and then restarted the service.

              icinga2 feature enable ido-mysql

After that:

              systemctl restart icinga2

Instalando Icinga 2 Web

Until now we have installed the server part of Icinga2, now it is the turn of the web interface that works with a web server. We chose apache in this tutorial, installed it, enabled it and started the service.

               yum install httpd

To enable it:

                  systemctl enable httpd

and to start it:

                 systemctl start httpd

And we execute the following commands to enable the port in the firewall:

              firewall-cmd –add-service=http

And:

             firewall-cmd –permanent –add-service=http

Icinga2web uses REST API for its internal processes and we must enable it to get full functionality.

We enabled it with the command:

             icinga2 api setup

Now we will edit the file: api-users to define username and password:

              nano /etc/icinga2/conf.d/api-users.conf

We replace user and password with the one we want.

In my case:

Another file we need to edit is the ido-mysql.conf to match the mariadb parameters we have configured.

In this case the file looks like this.

And now, we restart the icinga2 service.

             systemctl restart icinga2

Now we must enable the SCL repository to continue with the installation in an optimal way.

              yum install centos-release-scl

We proceed to install Icinga Web 2

            yum install icingaweb2 icingacli

If you use SELinux, then you will also need to install:

               yum install icingaweb2-selinux

The next thing you need to do is to install packages to work with FPM (FastCGI Process Manager):

               yum install rh-php71-php-fpm

Start the service:

              systemctl start rh-php71-php-fpm.service

And enable it:

              systemctl enable rh-php71-php-fpm.service

Now the module for mysql:

              yum install rh-php71-php-mysqlnd

And restart the service:

              systemctl restart rh-php71-php-fpm.service

We must now create a token that we will use in the web installer.

               icingacli setup token create

Finally we must restart apache

             systemctl restart httpd

It is highly recommended to modify the timezone in /etc/opt/rh/rh-php71/php.ini. In my case I’ll put America/caracas.

            nano /etc/opt/rh/rh-php71/php.ini

We restart the apache services and the php fpm.

               systemctl restart httpd

               systemctl restart rh-php71-php-fpm

And with this we can complete the installation from our web browser.

              http://IP_SERVER/icingaweb2/

In that initial screen we must add the token we have generated and click on next.

The following screen shows the active modules: Activate Doc and Monitoring:

 

On the next screen, verify that we meet the software requirements.

Next it asks us the form of authentication: we choose database.

Next, on the next screen, we will place the requested parameters of mariadb. Click on next.

The next screen is for naming the backend. We leave it the same. Click on next.

Now it’s time to set up the administrative account

It is the turn of the log. We left everything the same.

Check that everything is on the screen shown and click next.

And now, monitoring module:

The screen that will be shown is the backend monitoring screen, we leave everything the same.

In the next screen, we must place the parameters of MariaDB for icinga.

Now we must configure command transport with the parameters that we configure in the file: etc/icinga2/conf.d/api-users.conf

On the next screen we leave it the same:

we’ll see the summary and that’s it.

We have already successfully completed the installation process.

Now we can log in.

And we can finally get into the dashboard. If we can see it, it means everything went great.

Icinga2 is a great Nagios-based network monitoring program. Its installation under CentOS is a bit long but the process is not complex and does not require much effort.

Please share this tutorial on social networks for your friends to take advantage of.

The post How to install Icinga 2 and Icinga 2 web on CentOS 7? appeared first on Linux Windows and android Tutorials.