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ZABBIX Installation and Configuration on CentOS

Zabbix is a highly integrated network monitoring solution. It is open-source and offers multiple features in one single package. It is not required to install any additional software on the monitored host. The use of services like SMTP and HTTP can be confirmed using some normal checks.

From servers and proxies, Zabbix will select the data needed for your analysis with custom intervals ensuring accuracy in every measurement! There is a back-end database from where you can refer to values and define problem thresholds which are also known as triggers. You can use macro variables to create notifications which will be more meaningful and helpful and send them in customized manner as per the escalation schedules, media types, and the recipients. You can also automate actions using remote commands.

Within the solution, there is a visualization feature available that quickly graphs the monitored items. You can also check functionality and response time on a website with the collection of data of mouse clicks on it. Zabbix monitoring solution can also provide one single view for many items by creating custom graphs for it. There is also a dashboard style overview in it for which Zabbix creates custom screens, network maps and slide shows.

You can install and configure Zabbix on Windows hosts or UNIX and track information like disk space, CPU load, network utilization, and more. Zabbix proxy collects data from Zabbix agents installed on any remote servers and can send it to Zabbix server which will be then stored in Zabbix database. Alexei Vladishev created the first Zabbix release in April 2001, naming it Zabbix 1.0 alpha 1.

Step by Step Procedure to Install and Configure Zabbix on CentOS

Prerequisites

  • Cent-OS machine
  • MySQL Database
  • Root Privilege
  • Hardware requirements:
    • 128 MB of Physical memory
    • 256 MB of Disk space

ZABBIX Server Installation

1. Update your repositories

Run below command to update your existing repositories

sudo yum update
2. Install official repository

Run below command to install official repository of zabbix

 sudo rpm -ivh http://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-1.el7.noarch.rpm
3. Enable repository

Run below commands to enable recently installed repository

    sudo yum --enablerepo="base" -y install yum-utils  
    sudo yum-config-manager --enable rhel-7-server-optional-rpms
4. Configure MySQL Database for Zabbix

Login MySQL and Run below commands to create new zabbix user and database

    mysql> CREATE DATABASE zabbixdb CHARACTER SET UTF8;
    mysql> GRANT ALL PRIVILEGES on zabbixdb.* to zabbix@localhost IDENTIFIED BY 'zabbix';
    mysql> FLUSH PRIVILEGES;
    mysql> quit
5. Zabbix server configuration

Run below command to open zabbix_server.conf file for configuration

sudo vim /etc/zabbix/zabbix_server.conf 

Now update and uncomment these below values as per your configuration

 

    • DBHost=localhost (enter your host name or ip address here)
    • DBName=zabbixdb (enter your database name here)
    • DBUser=zabbix (enter your database user here)
  • DBPassword=zabbix (enter your database password here)

Save and exit

6. Start zabbix service

Run below command to start zabbix-server

  sudo service zabbix-server start

Run below command to enable zabbix-server

  sudo systemctl enable zabbix-server
7. Tunning Frontend

Run below command to open zabbix.conf file

sudo vim /etc/httpd/conf.d/zabbix.conf
8. Enable Time Zone

Enable timezone by uncomment below line then save and exit

php_value date.timezone Europe/Riga 
9. Restart Services

Run below commands to restart following services

    sudo service httpd restart  
    sudo service mariadb restart  
    sudo service zabbix-server restart
10. Check Status

Run below commands to check status of following services

    sudo service httpd status  
    sudo service mariadb status  
    sudo service zabbix-server status

Output of these above commands should be active e.g. [Active: active (running)]

11. Configuration web browser
    • Open your favourite browser and insert this URL (ip_address/zabbix)
    • If you see this Welcome Page then click `Next step` button
    • Check pre-requisites and click `Next step` button
zabbix 02 1
    • Click `Next step` button after configure DB connection
zabbix 03 1
    • Click `Next step` button after enter Zabbix Server details
zabbix 04 1
    • Confirm everything and click `Next step` button
zabbix 05 1
    • Click `Finish` button
zabbix 06 1
12. Login Zabbix
    • Username: Admin (default)
    • Password: zabbix (default)
zabbix 07 1
13. System Information on Dashboard
    • Zabbix server is running:         Yes        hostname:10051 (default port)
zabbix 08 1

If you see below error or your zabbix server is not running

#Error: Zabbix server is not running: the information displayed may not be current

then run below commands to install and execute policies :

    sudo yum install policycoreutils-python
    sudo checkmodule -M -m -o zabbix_server_add.mod zabbix_server_add.te
    sudo semodule_package  -m zabbix_server_add.mod -o zabbix_server_add.pp
    sudo semodule -i zabbix_server_add.pp
14. Restart Services

Run below commands to restart following services

    sudo service zabbix-server restart  
    sudo service httpd restart  
    sudo service mariadb restart
15. Reload cache

Run below commands to reload cache of zabbix-server

  sudo zabbix_server -R config_cache_reload

ZABBIX Agent Installation

Zabbix agents sits on remote servers and collects data then sends it to zabbix servers for further processing and calculations. Zabbix agents can be Passive or Active, which means there is two different behaviour of communication between zabbix servers and zabbix agents. Active agents itself initiates to make connection with zabbix server and if there exists a firewall between agent and server then prefer Active agent so that you do not have to configure firewall settings to open specific port to open a specific socket.

1. To install zabbix agent

Run below command to install zabbix-agent

sudo yum install zabbix-agent

Run below command to open zabbix_agentd.conf file for configuration

 sudo vim /etc/zabbix/zabbix_agentd.conf

Edit below values and leave other values as it is (default):

  • #LogFileSize=1
    LogFileSize=100
    (increase size of log file to store logs)
  • #EnableRemoteCommands=0
    EnableRemoteCommands=1
  • #LogRemoteCommands=0
    LogRemoteCommands=1
  • #Server=
    Server=127.0.0.1
    (list of servers that can query your agent and here if server is on same
    machine you are working, then use 127.0.0.1)
  • #ServerActive=
    ServerActive=127.0.0.1
    (the server’s ip to which agent will send data)
  • #Hostname=
    # Hostname=Zabbix server
    (comment this line, server identifies agent by its hostname)
  • #RefreshActiveChecks=120
    RefreshActiveChecks=60

save and exit

2. Enable Zabbix agent

Run below command to enable zabbix-agent

 sudo systemctl enable zabbix-agent

Run below command to start zabbix-agent

 sudo systemctl start zabbix-agent

Run below command to check the status of zabbix-agent

sudo service zabbix-agent statusNo need to install any additional software on the monitored host.

 

We have walked through the steps necessary to install and configure ZABBIX on a CentOS server. While we have only scratched the surface of what is possible with this powerful monitoring tool, we hope that you now have a basic understanding of how to get started using it for your own needs.

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