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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What is Zabbix?

Zabbix is quite a wonder. It is an open-source application that works under the client-server architecture. In other words, when installed on any server, it requires an agent to be installed on the client computers. In this way, the application will be able to monitor all the behavior of the nodes as well as the performance of the network.

On the other hand, the development of Zabbix is quite positive and constant, which makes it quite safe and functional. In addition to being quite mature in its development supports several database management systems including the popular MariaDB, MySQL, PostgreSQL or proprietary alternatives such as Oracle and IBM DB2.

In this post, we will install step by step the Zabbix server on CentOS 8 / RHEL 8 / Oracle Linux 8.

Install Zabbix on CentOS 8 / RHEL 8 / Oracle Linux 8

As expected, Zabbix has precompiled binaries available for RHEL 8 and derivatives. These are available from the official repository, but there are some prerequisites we must meet. One of them is that we need a web server running on our computer. Besides that, a database management system like MariaDB.

Install LAMP on CentOS 8 / RHEL 8 / Oracle Linux 8

In this case, we have a complete tutorial where you can install LAMP on CentOS 8 / RHEL 8 / Oracle Linux 8. There, step by step, you will be able to get a web server running as well as the database manager MariaDB.

Read, How to install LAMP on CentOS 8 / RHEL 8 / Oracle Linux 8?

Create the Zabbix user on MariaDB

Once the server is running correctly. It is necessary to create a new user and database for Zabbix. To do this, open the MySQL console and run:

:~# mysql -u root -p 
> CREATE DATABASE zabbixdb;
> GRANT ALL PRIVILEGES ON zabbixdb.* TO 'zabbixuser'@'localhost' IDENTIFIED BY 'zabbixpss';
> FLUSH PRIVILEGES;
> exit;

Install Zabbix on CentOS 8 / RHEL 8 / Oracle Linux 8 (I)

Then we can install Zabbix without problems. We will achieve this by using the official Zabbix repository for RHEL 8.

So as a root user, run the following command to add the GPG key from the repository:

:~# rpm --import http://repo.zabbix.com/RPM-GPG-KEY-ZABBIX

Then add the repository as such:

:~# rpm -ivh https://repo.zabbix.com/zabbix/4.0/rhel/8/x86_64/zabbix-release-4.0-2.el8.noarch.rpm

Then proceed to install the Zabbix packages.

:~# dnf install zabbix-server-mysql zabbix-web-mysql zabbix-agent zabbix-get zabbix-sender zabbix-java-gateway

If you want you can modify the PHP timezone on the Zabbix configuration file.

:~# nano /etc/httpd/conf.d/zabbix.conf

Uncomment the line date.timezone and add your timezone.

php_value date.timezone [TIMEZONE]

The next step is to load the initial Zabbix database.

:~# zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql -u zabbixuser -p zabbixdb

Then, it is necessary to specify the database parameters in the Zabbix configuration file.

:~# nano /etc/zabbix/zabbix_server.conf

In this file, you have to modify the following values

DBHost:localhost
DBName=[DB_name]
DBUser=[Mariadb_zabbix_user]
DBPassword=[Password]

Save the changes and close the file. The next step is to open the Zabbix ports in the Firewall so that it can run smoothly.

:~# firewall-cmd --permanent --add-port=10050/tcp
success
:~# firewall-cmd --permanent --add-port=10051/tcp
success
:~# firewall-cmd --reload
success

Finally, start the service. If you want Zabbix to run at system startup, you can add these commands:

:~# systemctl enable zabbix-server
:~# systemctl start zabbix-server
:~# systemctl restart httpd

Install Zabbix on CentOS 8 / RHEL 8 / Oracle Linux 8 (II)

The last thing we need to do before we have our Zabbix server running is to complete the installation using the web browser. Open it and go to http://your-server/ you will see this

Then, the installer will check the prerequisites.

Now, we have to set the parameters of the database that we have previously defined.

Then, set up some server details.

In the end, you will see the summary and the message that Zabbix has been successfully installed.

After finishing the process, you will see the login screen. Log in with admin as user and zabbix as password.

Finally, you will see the dashboard. And that is it.

Install the Zabbix agent on the nodes

In order for Zabbix to monitor correctly, it is necessary to install the agents in each of the nodes. Probably, they use different operating systems, so the installation can vary in each of them.

First, you have to add the Zabbix repository for each system. In case you use Ubuntu 18.04:

:~$ wget https://repo.zabbix.com/zabbix/4.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_4.0-2+bionic_all.deb
:~$ sudo dpkg -i zabbix-release_4.0-2+bionic_all.deb
:~$ sudo apt update

Then, install Zabbix with the following command:

:~$ sudo apt install zabbix-agent

If you use CentOS 8, add the repository with this command:

:~# rpm -ivh https://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-2.el7.noarch.rpm

Then, install the agent with the following command:

:~# yum install zabbix zabbix-agent

Finally, if you use Debian 9:

:~$ wget https://repo.zabbix.com/zabbix/4.0/debian/pool/main/z/zabbix-release/zabbix-release_4.0-2+stretch_all.deb
:~# dpkg -i zabbix-release_4.0-2+stretch_all.deb
:~# apt update

And you install it with the command:

:~$ apt install zabbix-agent

Conclusion

Zabbix is an important application in any network service. Thanks to it it is possible to do complete monitoring on the operation of the same one. It also verifies the state of the nodes. In this post, you have learned to install it on the server-side.

The post How to install Zabbix server on CentOS 8 / RHEL 8 / Oracle Linux 8 ? appeared first on Linux Windows and android Tutorials.

What is Zabbix?

Zabbix is a powerful tool for network monitoring. It is open-source and uses database handlers to process the data collected from your analyses.

There are too many features that make Zabbix a necessary tool in a network because with it the sysadmin can have detailed information about what happens in it. In addition, you can have real-time monitoring with their due reports.

Install Zabbix on Debian 10

The procedure for installing Zabbix is quite simple. On the other hand, we will work on the terminal installing and preparing the installation of Zabbix. Then, you will have to complete the process using the web browser.

In addition, all post will use the root user. To be the root user, open the terminal and run:

:~$ su

So, let us start.

1) Install LAMP Stack on Debian 10

Zabbix has a very friendly web interface to obtain the monitoring results. In this sense, as it is a web application, it is required to have installed LAMP on Debian 10.

So, you can read How to install LAMP on Debian 10?

Besides that, you have to install these PHP modules with this command:

:~# apt install php php php-mysql php-curl php-json php-cgi php-xml php-mbstring php-bcmath

So, we can continue.

2) Create the Zabbix database and the MariaDB user

Zabbix requires a database manager. But it also requires a database. Creating the database is simple, but it is recommended to create a user dedicated to it.

Enter the MariaDB console with the following command:

:~# mysql -u root -p

Then, create a new database and the new user.

> CREATE DATABASE zabbixdb;
> GRANT ALL ON zabbixdb.* TO 'zabbixuser'@'localhost' IDENTIFIED BY 'zabbixpss';
> FLUSH PRIVILEGES;
> exit;

That is all for MariaDB.

3) Add the Zabbix repository for Debian 10

A great advantage that Zabbix gives us is that it has a repository for Debian 10. So, all this makes the installation process even easier.

To add the repository, just download the DEB file provided by the project and install it.

:~# wget -c http://repo.zabbix.com/zabbix/4.0/debian/pool/main/z/zabbix-release/zabbix-release_4.0-2%2Bbuster_all.deb

Then, install it.

:~# dpkg -i zabbix-release_4.3-1+buster_all.deb

4) Install Zabbix on Debian 10 (I)

After the repository has been successfully added, it is necessary to update APT.

:~# apt update

Next, we can install the packages without problems with the following command:

:~# apt install zabbix-server-mysql zabbix-agent zabbix-frontend-php

Once Zabbix is installed, you need to start the default database that comes with the installation. The process is very simple, just use this command:

:~# zcat /usr/share/doc/zabbix-server-mysql/create.sql.gz | mysql -u zabbixuser -p zabbixdb

In order to make Zabbix configured correctly with MariaDB, it is necessary to change some parameters in its configuration.

To do this, edit the file /etc/zabbix/zabbix_server.conf

:~# nano /etc/zabbix/zabbix_server.conf

Then, modify the following parameters:

DBHost
DBName
DBUser
DBPassword

Of course, set the MariaDB parameters that you have configured.

Next, save the changes and close the file.

Finally, restart the services.

:~# systemctl restart apache2
:~# systemctl restart mariadb
:~# systemctl restart zabbix-server

5) Install Zabbix on Debian 10 (II)

Now you have to complete the installation using the web browser. Open it and go to your server http://server-ip/zabbix and you will see the following:

Next, the wizard will check for the prerequisites.

Now, you have to configure the DB connection.

Next, the server details.

Now, the installation summary.

If everything was OK, you will see this.

Then you can log in. The default user is admin and the password is zabbix. After that, you will see the dashboard.

Conclusion

Zabbix is one of those applications that you have to have on a server to control the entire network. especially when there are many nodes and it is necessary to know what is the performance of it. In this post, you have learned how to install it in Debian 10, Buster.

Please share this post with your friends and join our Telegram channel.

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In this site, we have already talked about Zabbix, this fantastic application that serves to monitor various services within a network. However, it is not only limited to services but also to specific nodes. So, it is open source with all the advantages we can have over it and also has agents available for various systems.

So, let us start to install Zabbix server 4.

1. Install Apache web server and PHP

Zabbix Server has a quite nice web interface that can be accessed from the clients. This interface requires a web server and PHP. Therefore, the first step in this guide is to install them both. Open a terminal and run:

:~$ su
:~# yum install httpd php php-mysql php php-mysql php-curl php-json php-cgi php-xml php-mbstring php-bcmath

Next, create a new file for test PHP.

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

And add the following:

<?php
phpinfo();
?>

Then, it is necessary to add the rules to the firewall to allow Apache and PHP access.

:~# firewall-cmd --permanent --add-service=http
:~# firewall-cmd --reload

After that, start and enable the service.

:~# systemctl enable httpd
:~# systemctl start httpd

Finally, open your web browser and go to http://SERVER_IP/test.php.

Now, Apache and PHP are correctly installed.

2. Install and configure MariaDB

The way Zabbix manages data efficiently is thanks to a robust and reliable database handler. Zabbix allows the use of MySQL, MariaDB, and PostgreSQL. For now, I will use MariaDB. So, the next step is to install and configure it.

:~# yum install mariadb-server

After that, star and enable the MariaDB service:

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

Now, set a root the password using the mysql_secure_installation script.

:~# mysql_secure_installation

As you can see, there are several parameters that you can configure. In the case of this tutorial, you can answer as you want because it does not affect anything. However, I recommend you read them carefully and make the best decision. In my case, I have answered Y, N, Y, Y.

After that, it is necessary to create a database and user for Zabbix.

:~# mysql -u root -p
CREATE DATABASE zabbixdb;
GRANT ALL PRIVILEGES ON zabbixdb.* TO 'zabbixuser'@'localhost' IDENTIFIED BY 'zabbixpss';
FLUSH PRIVILEGES;
exit;

3. Install Zabbix Server 4

There is a fairly simple way to install Zabbix server 4. It is to do it through an external repository and then use yum. So let us go for it.

:~# rpm --import http://repo.zabbix.com/RPM-GPG-KEY-ZABBIX
:~# rpm -ivh https://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-1.el7.noarch.rpm

Next, install Zabbix 4 agent and others required packages.

:~# yum install zabbix-server-mysql zabbix-web-mysql zabbix-agent zabbix-get zabbix-sender zabbix-java-gateway

Now, edit the PHP timezone on the Zabbix configuration file.

:~# nano /etc/httpd/conf.d/zabbix.conf

And uncomment the “date.timezone” setting and replace it with your timezone:

php_value date.timezone YOURTIMEZONE

Next, import the initial database for Zabbix.

:~# zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql -u zabbixuser -p zabbixdb

After that, you have to specify the databases parameters on the Zabbix configuration.

:~# nano /etc/zabbix/zabbix_server.conf

DBHost=localhost
DBName=zabbixdb
DBUser=zabbixuser
DBPassword=YOUR_PASSWORD

Next, set the firewall rule for Zabbix.

:~# firewall-cmd --permanent --zone=public --add-port=10051/tcp
:~# firewall-cmd --permanent --zone=public --add-port=10050/tcp
:~# firewall-cmd --reload

Finally, enable and start the Zabbix services.

:~# systemctl enable zabbix-server
:~# systemctl start zabbix-server
:~# systemctl enable zabbix-server 
:~# systemctl start zabbix-server
:~# systemctl restart httpd

After that, complete the installation.

4. Complete the installation

Now, open your web browser and go to http://SERVER_IP/zabbix and you will see this.

So, let us start.

First, the wizard will check the prerequisites. Click on next.

Next, configure the database connection. You have to type your credentials.

Next, configure the server details.

After that, you will see the installation summary.

You have successfully installed Zabbix.

Now, login into the main screen. The user is admin y and the password is Zabbix.

And you will see the dashboard.

So, that’s it.

Conclusion

With this Zabbix is installed. This wonderful monitoring program, what remains is to install the agent in each of the nodes you want to visualize.

Its installation is quite simple and only requires a little time and knowledge.

Please share this article with your friends.

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As the article title says, Zabbix is a fantastic open-source application that monitors networks within a given topology. It was first created by Alexei Vladishev, specialized in networks with an important user base and an active community, that is always contributing both in its development and in its support for users. Uses MySQL, PostgreSQL, SQLite, Oracle or IBM DB2 as database. Its backend is written in C and the web frontend is written in PHP.

Let’s get to work: installing the Prerequisites

The first thing we must always do is to make sure that our system is up to date. For them we write on a terminal:

           sudo apt update && sudo apt -y upgrade

With this single line we do two things: the first is to refresh the cache of the repositories and the second is to update them without being asked if we want to do it.

Once our system is updated with the latest security patches, the next thing we need to do is install a LAMP server. We can do it with the following instructions, always from the terminal:

          sudo apt install apache2 libapache2-mod-php7.2 mysql-server-5.7 mysql-client php7.2 php7.2-mysql php7.2-curl php7.2-json php7.2-cgi php-xml php-mbstring php-bcmath

Already with that we will have a basic LAMP server running on our system.

Then we must change our timezone in the php.ini file. As an example I will put America/Caracas.

           sudo nano /etc/php/7.2/apache2/php.ini

For the changes to take effect, we must restart the apache service2.

sudo systemctl restart apache2.service

Installing Zabbix

Now we can add the Zabbix repository for Ubuntu 18.04 and then install it using the APT package manager. To add the repository just install a.deb file that we download with the following command:

          wget http://repo.zabbix.com/zabbix/3.4/ubuntu/pool/main/z/zabbix-release/zabbix-release_3.4-1%2Bbionic_all.deb

and then we install it with:

sudo dpkg -i zabbix-release_3.4-1+bionic_all.deb

As we have added a new repository, we must refresh the cache of it, we do it with:

sudo apt update

And we proceed to install in a single command: the Zabbix server, the agent and the  front-end to access from the web browser:

          sudo apt install zabbix-server-mysql zabbix-agent zabbix-frontend-php

Configure MySql

At this point, we already have Zabbix installed but we need to configure mysql so that the program knows how to use it.

            sudo mysql_secure_installation

Where we will define our root key. The rest of the questions can be answered according to our taste. In my case, I said: Y,N,Y,Y.

Now we must log in to mysql with the password we have previously defined, to create the database and the zabbix user.

         sudo mysql -u root -p

          CREATE DATABASE zabbix;

And select the database with:

           use zabbix;

Now we must create a mysql user that has permissions on the Zabbix database.

         GRANT ALL ON zabbix.* TO ‘zabbixuser’@’localhost’ IDENTIFIED BY ‘zabbixpss’;

We briefly explain: zabbix is the database; zabixuser is the username mysql and zabbixpss is the password for that username. Obviously when you do the tutorial don’t tell anyone the password 😉

Now we leave mysql writing exit

At this point we must enable the ubuntu root user for the following commands to work.

sudo -i

And then:

      sudo passwd root

it will ask us for a new password and that’s it.

We log in as root:

su

Next, copy the mysql configuration to the new user.

      zcat /usr/share/doc/zabbix-server-mysql/create.sql.gz | mysql -uzabbix -p zabbix

Defining the basic settings of Zabbix

We are almost finished, for now we have to define some parameters in the Zabbix configuration file so that it can work correctly.

          nano /etc/zabbix/zabbix_server.conf

We must modify these parameters so that you can communicate with mysql:

DBHost=localhost

DBName=zabbix

DBUser=zabbixuser

DBPassword=zabbixpss

For these changes to take effect we must restart the Zabbix, apache and mysql services.

For apache:

           systemctl restart apache2.service

Next, the zabbix server:

           systemctl restart zabbix-server.service

And Finally, mysql:

           systemctl restart mysql.service

We have finally completed the process, and can view your front-end from the web browser.

          http://ip_server/zabbix

and we should see something like this.

We click on next

After clicking on next we are presented with a screen where we must enter the mysql configuration parameters:

Then we can name the zabbix instance that we have just created:

You will then give us the summary of the pre-installation:

And finally, we did it: Zabbix-server is installed!!

When you access the zabbix directory again from your browser, you will be able to log in.

To log in as administrator, the user is admin and the password is zabbix, with this we will enter the dashboard

Of course, in this instantiation the Dashboard is empty, the agent is already installed in the machines to be monitored, and then add them to Zabbix.

Zabbix is a very useful server tool for monitoring services and today we have learned how to install it in our Ubuntu Server 18.04.

Please share this article through your social networks.

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