Zabbix built-in HA Vs Pacemaker/corosync

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 Built-in HA in Zabbix

Since Zabbix 7.0, Zabbix Server has built-in high availability (HA) support. This means:

  • You can run multiple Zabbix server nodes.
  • Only one is active at a time.
  • The others are standby and can take over if the active one fails.
  • Failover is handled internally by Zabbix, using database coordination (it stores node status in the DB).

So why Pacemaker and Corosync then?

You don’t need Pacemaker + Corosync for the Zabbix Server itself anymore if you’re using built-in HA.

However, there are still scenarios where Pacemaker/Corosync may be useful:

When to Use Pacemaker/Corosync

  1. Database Failover:

  • Zabbix’s built-in HA does not handle database HA.
  • Pacemaker/Corosync can manage MySQL/MariaDB/PostgreSQL clusters with automatic failover.

       2. Frontend High Availability:

  • Zabbix frontend (Apache/Nginx + PHP) does not have built-in HA.
  • You can use Pacemaker/Corosync (or HAProxy/Keepalived) to manage failover of frontend nodes and virtual IPs.

       3. Virtual IP Management:

  • Built-in HA in Zabbix does not provide a virtual IP.

Tools like Pacemaker or Keepalived are needed if you want a static virtual IP for the Zabbix server that always points to the active node.


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