Zabbix Tutorial: Learn Monitoring from Scratch (2026)
Zabbix was my go-to monitoring tool when I needed agent-based monitoring with built-in visualization and alerting. It provides auto-discovery, templates, triggers, and a web UI out of the box without assembling separate components.
By the end of this tutorial, you will understand how to set up Zabbix server and agents, create templates and triggers, configure notifications, and use Zabbix auto-discovery for large environments.
Zabbix Server and Agent Installation
Zabbix uses a central server with agents on monitored hosts. The server requires a database (PostgreSQL or MySQL) and a web frontend (PHP). Agents collect data and send it to the server. Proxy servers distribute load in large environments.
sudo apt install zabbix-server-pgsql zabbix-frontend-php php-pgsql zabbix-agent
sudo -u postgres createuser zabbix
sudo -u postgres createdb -O zabbix zabbix
zcat /usr/share/zabbix-sql-scripts/postgresql/server.sql.gz | sudo -u zabbix psql zabbixTemplates: Reusable Monitoring Configuration
Templates group related items, triggers, and graphs for a device type. Zabbix ships with templates for Linux, Windows, network devices, databases, and web servers. Custom templates extend monitoring for specific applications. Template inheritance enables base and custom monitoring layers.
# Zabbix UI:
# Configuration -> Templates -> Import
# Select OS Linux by Zabbix agent template
# Link template to hosts for automatic monitoringItems, Triggers, and Actions
Items define what data to collect (CPU load, disk usage, HTTP response). Triggers evaluate item data and change state (OK, Warning, High, Disaster). Actions send notifications when triggers fire. Trigger expressions use functions like avg(), last(), min(), max() with time periods.
{Template OS Linux:system.cpu.load[all,avg15].last()}>5
and {Template OS Linux:system.cpu.load[all,avg15].avg(5m)}>3Auto-Discovery and Low-Level Discovery
Zabbix auto-discovery finds devices on the network by IP range. Low-level discovery (LLD) automatically creates items, triggers, and graphs for dynamic resources like mounted filesystems, network interfaces, and running services. LLD rules use JSON discovery data.
# Zabbix UI:
# Configuration -> Discovery -> Create discovery rule
# IP range: 10.0.1.1-254
# Check: ICMP ping, Port 10050 (Zabbix agent)
# Action: Add host to group 'Auto-discovered servers'Web Monitoring and Alerts
Zabbix web scenarios simulate user interactions with web applications. Each scenario has steps that check URLs, response codes, text patterns, and response times. Triggers alert when pages return errors or load too slowly. Alert media include email, SMS, Slack, and custom scripts.
zabbix_get -s 10.0.1.50 -k web.test.in[website,step1,lastcode]
zabbix_get -s 10.0.1.50 -k web.test.time[website,step1,total]
# Configure actions in Zabbix UI:
# Administration -> Media types -> Create Slack webhookZabbix Proxy for Distributed Monitoring
Zabbix proxies collect data on behalf of the server in remote locations or large environments. The proxy buffers data if the server is unreachable and sends it when connectivity resumes. Proxies reduce server load and support monitoring across NAT and firewalls.
# /etc/zabbix/zabbix_proxy.conf
Server=10.0.0.1
Hostname=proxy-nyc
DBName=zabbix_proxy
DBUser=zabbix
systemctl start zabbix-proxyFrequently Asked Questions
What is the difference between Zabbix and Nagios?
Zabbix has built-in web UI, templates, auto-discovery, and a database backend without separate components. Nagios requires manual configuration and separate addons for visualization and graphing.
Does Zabbix support cloud monitoring?
Yes, through templates for AWS, Azure, and GCP. Zabbix can monitor cloud resources via API polling and cloud-native metric endpoints.
What is the difference between Zabbix active and passive checks?
Active checks: Zabbix agent connects to server and sends data periodically. Passive checks: server connects to agent and requests data. Active checks reduce server load in large environments.
How does Zabbix handle high availability?
Zabbix supports HA for the server component with active/passive nodes sharing a database. Zabbix proxies naturally distribute load and provide isolation between locations.
Originally published on Ayodhyyya. Last updated June 1, 2026.