Designed to be efficient and quite simple, Doppler comes to us. Doppler is an open-source tool to monitor our system, either remotely or locally. Of course, it is born with the objective of being used in small servers where the information to obtain is very precise and that does not consume so many resources.

But let’s not deceive ourselves, it is a very well done project and with it, we will be able to obtain basic information from our computer without spending any resources on a very nice web interface.

What can I monitor with Doppler?

Using Doppler we will get some basic data like:

• CPU temperature. It is necessary to install the lm-sensors package.
• CPU Load.
• RAM usage (Mb).
• Swap usage (Mb) In case your system does not have swap configured or available the value will always be 0.
• Disk usage (Mb) If you connect a new hard disk, it will automatically be reflected in the graph.
• Network I/O (kb/s)

As you can see is the basic information about the performance of the system. However, there is other information we may be able to obtain.

• Hostname
• Operating system
• CPU core count
• Uptime
• Process count

The project looks interesting and in the future, it is planned to incorporate other features such as log support and GPU temperature monitoring.

So, let’s install it.

How to install the Doppler monitoring tool on Debian 10?

First, we will have to install lm-sensors so that the application is able to show the CPU temperature. So let’s go for it.

Open a terminal and run the following:

 :~$ sudo apt install lm-sensors

Now we can install Doppler by downloading its binary compiled for Linux. For that, we’ll use wget. The latest version is 0.1.0.

:~$ wget https://github.com/EnKrypt/Doppler/releases/download/v0.1.0/doppler-0.1.0-linux-x64 -O doppler

So, if you want to use doppler as a command inside Linux, move it to /usr/local/bin. It is the most comfortable to work with.

 :~$ sudo cp doppler /usr/local/bin

The next step is to give permission to execute the downloaded binary. So we’ll use this other command:

:~$ sudo chmod +x /usr/local/bin/doppler

Now we can launch it using the doppler command.

By default the application runs using port 3456, so make sure that port is available in the firewall. However, we can change it.

Also by default the time interval in which Doppler works is 2.5 seconds. A fairly adequate refresh time but we can also change it.

In case you want to change the port and data refresh time, you can use this command:

:~$ doppler p [port] i [intervale]
:~$ doppler -p 1234 -i 6000

This will make Doppler available at Port 1234 with a 6-second interval.

Then, open your favorite web browser and go to http://your-server:1234 you will see this:

As you can see, everything is very simple and well organized. Ideal for modest computers and home servers. It’s the beauty of the variety: we have a lot to choose from.

Conclusion

There are many applications in Linux and every day they are more efficient and oriented to many diverse needs. Proof of this we have Doppler that is profiled as an alternative to more powerful tools but with options that many times we do not need. Simple, fast and without configuration problems, Doppler is a great application to monitor small servers.

We thank the developer of the application for making it available to everyone, and we will follow closely and invite you to visit the Github repository of the project for more information.

So, check other monitoring tools on this link.

The post How to install the Doppler monitoring tool on Debian 10? 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.

NMAP is a popular network scanning and sniffing tools is also a powerful tool for port scanning type safety assessment, is widely used in the security scan, NMAP is a useful online tool, also is often used in the production and development, mainly for port open view of detection and LAN information collection, etc., different Linux distributions generally also with NMAP package management tool, can also choose to go to the website to download the source code package compiled installation.

Install nmap

In case, you are unable to use nmap command, use below command to install it

 centos：yum install nmap
 ubuntu：apt-get install nmap  

Check that the installation is successful

 nmap -v

Nmap usage method

• Scan IP which common TCP port and UDP port are open

nmap 127.0.0.1 or nmap -sS -sU -p 1-65535 127.0.0.1

• Scan multiple IP addresses or subnet

nmap 127.0.0.1 172.16.6.1
nmap 172.16.6.1-100
nmap 172.16.6.0/24  

In the scan result, if the state column is open, it means the state is open; if it is filtered, it may be filtered by a firewall; if it is closed, it means the port is closed.

• Scans which hosts are alive in the subnet

nmap -n -sP 172.16.6.0/24

• Nmap route trace

namp –traceroute 8.8.8.8  

• Scans IP or subnet hosts for port

nmap -p 12598 127.0.0.1
nmap -p 12598 172.16.6.0/24

• An option that goes one step further and gives you more information about the services running on a specific host is ‘-A’.

nmap -A 127.0.0.1

• Nmap scans the operating system type using the -O option

nmap -O 12598 127.0.0.1

• For an in-depth understanding of the use of the nmap command, use it to examine the man pages

man nmap

Conclusions

nmap is one of those utilities that have so many options and capabilities, it can actually be overwhelming. As is the case with those types of utilities, you will end up using only a fraction of its capabilities to help get a specific job done. If you want to use it at its full potential, you’re in for a lot of trial and error and some hands-on experience with real networks.

So, you can read our post abour networks in this link.

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The post Linux Nmap network scanning tool installation and use appeared first on Linux Windows and android Tutorials.

Install Docker and Docker-compose

The first thing to do is to install Docker and Docker compose in our system. For centos7, use the following command.

For the rest of the releases, it’s best to read the official Docker documentation.

[root@localhost ~]# yum install docker python-pip docker-compose -y

Check that the installation is successful

 [root@localhost ~]# docker-compose -v && docker -v

Deploy zabbix using Docker-compose

• First, create a folder and then create docker-compose.yml files in it

[root@localhost ~]# mkdir zabbix
[root@localhost ~]# cd zabbix/
[root@localhost zabbix]# touch docker-compose.yml

• Edit docker-compose.yml file

[root@localhost zabbix]# vim docker-compose.yml 
 version: '3'
 services:
   zabbix-mysql:
     image: mysql:5.6
     container_name: zabbix-mysql
     ports:
       - '3306:3306'
     environment:
       MYSQL_ROOT_PASSWORD: zabbix
     volumes:
       - /root/zabbix/mysql-data:/var/lib/mysql
 zabbix-server:
     image: zabbix/zabbix-server-mysql:ubuntu-3.0.4
     container_name: zabbix-server
     environment:
       DB_SERVER_HOST: "zabbix-mysql"
       MYSQL_USER: root
       MYSQL_PASSWORD: zabbix
     ports:
       - '10051:10051'
     links:
       - zabbix-mysql
     depends_on:
       - zabbix-mysql
 zabbix-web:
     image: zabbix/zabbix-web-nginx-mysql:ubuntu-3.0.4
     container_name: zabbix-web
     environment:
       DB_SERVER_HOST: zabbix-mysql
       MYSQL_USER: root
       MYSQL_PASSWORD: zabbix
       ZBX_SERVER_HOST: "zabbix-server"
       PHP_TZ: Asia/Shanghai
     ports:
       - '80:80'
       - '443:443'
     links:
       - zabbix-mysql
       - zabbix-server
     depends_on:
       - zabbix-mysql
       - zabbix-server

Important environment variable Settings

• Zabbix-web-nginx-mysql and zabbix-web-nginx-mysql image versions remain consistent (ubuntu-3.0.4 or other)
• MYSQL_ROOT_PASSWORD: mysql root password
• MYSQL_USER: Connect the mysql user
• MYSQL_PASSWORD: Connect the mysql password

Running and testing zabbix

[root@localhost ~]# docker-compose up -d
[root@localhost ~]# docker-compose ps

Wait 2 minutes for the database initialization to complete

Next, open your web browser and go to your server using the port 80.

Log in using Zabbix’s default user and password
user: Admin password:zabbix
After that, you will see the dashboard

In a nutshell with Docker Compose, you no longer need to use shell scripts to start the container. In the configuration file, all containers are defined through the services, and then the application is started, stopped, and restarted using the docker-compose script, along with the services in the application and all containers that depend on the services. Docker Compose is a tool for defining and running multi-container Docker applications. it USES YAML files to configure the service of the application and a single command to perform the creation and startup of all containers. The docker-compose cli tool allows users to run commands for multiple containers simultaneously.

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Glances is a cross-platform system monitoring tool written in Python. Glances helps us keep an eye on our system, just the website project says.

Among its main features, we have that it is possible to choose to display system information on the terminal or remotely through a web interface. It also has an API that allows third-party applications to use Glances.

Some of the parameters that Glance allows you to monitor are there:

• CPU.
• Memory.
• Load.
• Process list.
• Network interface.
• Disk I/O.
• IRQ / Raid.
• Sensors.
• Filesystem (and folders).
• Docker.

As you can see, the information you can get by using it is varied. So, let’s install Glances.

1. Check the Python version

In this first step, you must verify which version of python your CentOS 7 system has. This is because Glances requires at least Python 2.7 or Python 3.4. So run this command:

:~$ su
:~# python -version

At the moment I’m using CentOS 7 and I’ve always updated it. However, in case you don’t have a valid version of python, you can use this tutorial.

So, let’s continue.

2. Install Glances on CentOS 7

Now it’s the turn to install Glances. We have several ways to do this. Both are very easy so I’ll tell you how it is.

The first way to install Glances is to do it through the auto install script. To do this, you can use CURL or wget to download the script and run it with bash.

:~# curl -L https://bit.ly/glances | /bin/bash

or

:~# wget -O- https://bit.ly/glances | /bin/bash

It’s really simple and this method guarantees you to have the last version ready for production, i.e. the master branch.

However, we are using CentOS 7 and that means stability, right? then we are going to install the latest stable version of Glances and for that, I will use pip.

:~# yum install python-devel

Then, install pip from the EPEL repository.

:~# yum install epel-release

Now, install pip.

Now, upgrade pip.

:~# pip install --upgrade pip

When the installation is finished, it is necessary to install gcc.

:~# yum install gcc

Next, install psutil using pip.

:~# pip install psutil

Finally, install glances.

:~# pip installa glances

If you want to use additional libraries to enable other features of glans, you can use this command as well.

:~# pip install glances[action,browser,cloud,cpuinfo,chart,docker,export,folders,gpu,ip,raid,snmp,web,wifi]

And that’s it.

3. Using Glances

Now let’s use it. Execute the command glances to initialize the monitoring locally.

:~# glances

If you are running glances in a server, you can run.

:~# glances -s

In the client machine, just run.

:~# glances -c IP

Finally, if you nat to use the web interface run on the server.

:~# glances -w

On the client machine, open the web browser and go to http://IP_SERVER:61208.

Of course, don’t forget to add the rules to the firewall to open the glances port.

:~# firewall-cmd --zone=public --add-port=61208/tcp --permanent
:~# firewall-cmd --reload

And that’s it.

Conclusion

Glances is a pretty good tool to monitor your CentOS 7 server. It is built in Python and its memory consumption is quite efficient. Its installation in CentOS is something simple for a user accustomed to terminal commands.

Please share this article in your social networks.

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

To monitor the processes and the memory of your computer, there are tools such as top and htop, however, Hegemon is presented as a modular alternative to them. It is also written in Rust, which guarantees that its consumption will be very fair.

Some of its features are:

• Monitor CPU and memory usage, temperatures, and fan speeds.
• Expand any data stream to reveal a more detailed graph and additional information Adjustable update interval.
• Clean MVC architecture with good code quality.
• Unit tests.

For now, it only supports Linux, but in the future, the development team has in mind to include support for Mac OS and BSD.

So, let’s install Hegemon.

1. Install Rust Language

Hegemon is a tool built in Rust. Therefore, you must install it and configure it properly in order to run it.

We recently taught you how to do it, so there won’t be any problems.

2. Install Hegemon

One of the dependencies is Rust, but when its installation is complete, it is now necessary to install the system’s sensors. With this, Hegemon will be able to measure the temperature of your processors and show information closer to reality.

For RHEL and CentOS:

:~# yum install lm_sensors-devel

If you use Fedora:

:~$ sudo dnf install lm_sensors-devel7

In case you are using Debian, Ubuntu and Linux Mint.

:~$ sudo apt install libsensors4-dev

Now using the Rust cargo package manager, you can install Hegemon without problems.

:~$ cargo install hegemon

Then, run it.

:~$ hegemon

And you will see.

As you can see in the image, you can expand the information shown by pressing the space keyboard. In addition, you can change the default monitoring frequency to 3.

To exit, press q.

Conclusion

While Hegemon is at an early stage of development, the fact that it is modular makes it interesting. In other words, you can expand its functionality on your own. Being programmed in Rust gives us the opportunity to have a good tool without sacrificing resources.

Please share this post with your friends.

The post How to install Hegemon. A system monitor for Linux. appeared first on Linux Windows and android Tutorials.

For any system administrator it is essential to monitor the network it manages. At the same time, it is very important to have the right tool to do that task.

LibreNMS is a tool with a web interface for monitoring services within a network. It is released under GPLV3, so it is open source. It includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, HP and many more.

You can install it in the main Linux distributions oriented to it, for example, Debian, Ubuntu Server, CentOS, Suse and RHEL. It requires a web server, PHP and a database manager like MariaDB.

Let’s start.

0.- What you need

Installing LibreNMS is not as complicated as it may seem, but the following must be taken into account:

• It is necessary to have knowledge about the Linux terminal.
• You must be able to access through ssh.
• Commands must be run as root user. So your user must be able to have that privilege.

Let’s get to work.

1.- Upgrade the system

It’s always a good idea to have your operating system updated when you start an installation like this one. With this you will have the latest security patches on your system and it will be safer.

:~$ su
:~# apt update && apt upgrade

And with this it’s done.

2.- Install Apache Web server

The second step to install LibreNMS in Debian is to install a web server. In this case, I will use Apache Web server.

:~# apt install apache2

Then enable the service to start with the system.

:~# systemctl enable apache2

Finally, go to your web browser and access from the IP address of the server. http://IP_SERVER

If you see the image above, apache web server is correctly installed.

2. Install PHP

In order to run LibreNMS you need to install PHP.

:~# apt install php7.0-cli php7.0-curl php7.0-mbstring php7.0-gd libapache2-mod-php7.0 php7.0-snmp php7.0-xml php7.0-mysql php7.0-zip php7.0-json

At the end of the installation, you must test the installation. Create a file in /var/www/html/ and put some simple PHP code like this.

:~# nano /var/www/html/test.php

<?php
echo "PHP IS WORKING";
?>

Now, try open it from the browser.

If the code works then PHP is correctly installed.

3. Install MariaDB

In order to continue installing LibreNMS you have to install MariaDB. LibreNMS requires a database manager and MariaDB is simple, powerful and free.

:~# apt install mariadb-server

Now start, and enable the MariaDB service.

:~# systemctl enable mariadb
:~# systemctl start mariadb

Now you have to configure MariaDB. So, run the mysql_secure_installation script. There you will be able to define the password and other things.

:~# mysql_secure_installation

After defining the password, you will be asked other questions. Answer as you like, I did it Y, N, Y, Y.

The next step to install LibreMNS in Debian 9 is to create a database dedicated to the tool. It is also necessary to create a new user and assign necessary permissions.

:~# mysql -u root -p

CREATE DATABASE librenms;
USE librenms;
GRANT ALL PRIVILEGES ON librenms.* TO 'librenmsuser'@'localhost' IDENTIFIED BY 'librenmspss';
FLUSH PRIVILEGES;
exit;

Obviously, it replaces the data with what you consider appropriate. Choose a secure password.

Finally, edit the file /etc/mysql/mariadb.conf.d/50-server.cnf and leave it as in the image. You just nedd to add the following in mysqld section.

:~# nano /etc/mysql/mariadb.conf.d/50-server.cnf

innodb_file_per_table=1
sql-mode=""
lower_case_table_names=0

Then, restart the service:

:~# systemctl restart mariadb

MariaDB is done.

4. Install some required packages

In order for the installation to be ideally achieved, it is necessary to install some extra packages. Run:

:~# apt install composer fping git graphviz imagemagick mtr-tiny nmap python-memcache python-mysqldb rrdtool snmp snmpd whois

5. Install LibreNMS

Now it is the turn to install LibreNMS. First, create a system user with home located at /opt/librenms

:~# useradd librenms -d /opt/librenms -M -r
:~# usermod -a -G librenms www-data

You can now download LibreNMS cloning its repository thanks to Git.

:~# cd /opt/
:~# git clone https://github.com/librenms/librenms.git librenms

Now, change the owner of the folder.

:~# chown -R librenms:librenms /opt/librenms

It is now necessary to copy the initial configuration file.

:~# cp /opt/librenms/snmpd.conf.example /etc/snmp/snmpd.conf

Replace RANDOMSTRINGGOESHERE line and set your own.

:~# nano /etc/snmp/snmpd.conf

Then, you must download a distro detection script.

:~# curl -o /usr/bin/distro https://raw.githubusercontent.com/librenms/librenms-agent/master/snmp/distro

The next thing is to make the script executable and then restart the snmpd service.

:~# chmod +x /usr/bin/distro
:~# systemctl restart snmpd

Next, copy the cron script provided by LibreNMS to the /ect/cron.d directory.

:~# cp /opt/librenms/librenms.nonroot.cron /etc/cron.d/librenms

And finally, Copy the logrotate script too.

:~# cp /opt/librenms/misc/librenms.logrotate /etc/logrotate.d/librenms

Next, move the folder from /opt/ to /var/www/html

:~# mv librenms/ /var/www/html/

Finally run:

:~# cd /var/www/html/libremns
:~# ./scripts/composer_wrapper.php install --no-dev

6. Access from the web browser

Now you must complete the installation from the web. Go to http://IP_SERVER/libremns/html/

You will see this:

Now enter the parameters of the database you configured previously.

Then, it will start the configuration of the database. If you don’t see any errors, you can continue.

Now you have to configure your username and password.

If all goes well, you’ll see this. Click on generate config.

After creating the whole process. You access the log in screen. http://IP_SERVER/librenms/html/index.php/login

That’s it.

Conclusion

This type of tool is of great help to system administrators. LibreNMS is easy to install but you have to have a certain level of knowledge.

Spread this article on your social networks.

The post How to install LibreNMS on Debian 9? appeared first on Linux Windows and android Tutorials.

Nagios

Quite an ancient tool, originally called Nagios (author Ethan Galstadt). During the development process, a split occurred in the developer’s camp and a fork (Icinga) appeared. Now these systems develop independently, but there is much more in common than differences. Nagios exists in the free (core) and paid editions, Icinga is an honest Open source. Initially, a server-oriented daemon on bare C, the daemon is managed through a C-like config (looks like ISC BIND config). All checks are collected in a live queue and executed in strict order. This imposes certain limitations on scalability – the server will keep a large number of checks without difficulty, but the more of them, the more time passes between them. A couple of thousand checks (400 servers x 5 checks per server) makes the monitoring system virtually meaningless – there is too much time between checks. As an option, there is a client application called NRPE, it allows you to test locally, on the client (for those cases when it is not possible to check the service remotely), but this is an option. In addition, the checks through the client are conducted on the initiative of the server, so this does not affect the scalability. Nagios extends very well, plugins are written very simply (and there are a lot of them). Nagios is famous for its powerful and flexible system of readings – in the database it can write letters and send sms and messages to a pager, but there is a whole set of plug-ins – from an automatic call to a traffic light (not figuratively, but literally – this joy is controlled via ModBus). Icinga has two web interfaces to choose from – classic CGI and more modern in PHP. Subjectively, CGI is more convenient, although less flexible. The progenitor (nagios core) has only a CGI-version of the interface. It is important to note that Nagios does not know how and does not want to collect the statistics of answers, therefore it is meaningless to expect beautiful graphs in the style of Munin / Ganglia / Cacti from it. There is a bridge for Icinga connection with Ganglia, this is a fairly popular tandem in which Icinga responds primarily to the network map, hosts overview and notifications.

Main advantages of Nagios

• Simple file format. It can be easily configured using any self-written utilities
• Allows to leave comments with a timestamp
• There are plug-ins for all cases from third-party manufacturers

Disadvantages of Nagios

• There are no built-in visualization tools (except the network map)
• The complexity of scaling without the use of third-party plug-ins
• There is no way to monitor performance
• Can not be configured via interface
• You need to restart the server to take effect of the configuration changes
• Each plug-in runs as a separate process

Cacti

Initially, this tool is positioned to quickly and easily build SNMP statistics, but with the use of plugins (notify + treshold), it acquires the capabilities of a monitoring system. This PHP application, settings and configurations are stored in the MySQL database (the statistics are stored in RRD, which has a beneficial effect on the performance of the service). Very simple installation and initial setup (everything is done via the web interface), in general, scales well (especially if you use spine with a multithreaded SNMP questionnaire), a large number of basic templates for testing different types of devices. The main disadvantage of the application is its SNMP-centricity. This service is well suited for data collection from equipment, tolerable for collecting typical statistics of service performance (disk space, load CPU, etc.) and disgusting to collect complex and atypical metrics. Customization is poor.

Main advantages of Cacti

• High deployment speed with minimal additional coding
• Simplicity and convenience of the diagram browsing interface and their settings (do not immediately learn something complicated)

Disadvantages of Cacti

• A fairly rapid increase in the number of similar settings in the case of a large number of environments and Java application servers.
• Limited performance of non-native JMX solutions for Cacti.

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