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These notes are for upgrading from Zabbix 4.4.x to Zabbix 5.0.0. All notes are grouped into:
Critical- the most critical information related to the upgrade process and the changes in Zabbix functionality
Informational- all remaining information describing the changes in Zabbix functionality
It is possible to upgrade to Zabbix 5.0.0 from versions before Zabbix 4.4.0. See the upgrade procedure section for all relevant information about upgrading from previous Zabbix versions.
The minimum required PHP version has been upped to 7.2.0 from 5.4.0.
This change also affects the ability to install Zabbix frontend from packages in some distributions. See detailed instructions for installing Zabbix frontend from packages on RHEL/CentOS 7 and the affected Debian/Ubuntu versions.
The IBM DB2 database is no longer supported by Zabbix.uu
Microsoft Internet Explorer 11 is no longer supported by Zabbix.
mbedTLS (PolarSSL) crypto library is no longer supported by Zabbix. Supported crypto libraries are GnuTLS and OpenSSL.
Minimum database versions required for Zabbix 5.0.0 have been upped to:
Numeric (float) data type now supports precision of approximately 15 digits and range from approximately -1.79E+308 to 1.79E+308 (with exception of PostgreSQL 11 and earlier versions). This is by default for new installations. However, when upgrading existing installations, a manual database upgrade patch must be applied. The patch will alter data columns of history and trends tables, which usually contain lots of data, therefore it is expected to take some time to complete. Since the exact estimate depends on server performance, database management system configuration and version, and it cannot be predicted, it is recommended to first test the patch outside the production environment.
Please execute the appropriate patch (SQL file) for your database:
Note that with TimescaleDB the compression support must only be turned on after applying this patch.
The fullscreen mode has been removed from the Monitoring sections of the frontend. The same effect (showing only page title and content) now can be achieved by hiding the new vertical menu. The kiosk mode (page content only, no page title at all) remains.
The screen for configuring frontend defaults no longer has a Dropdown first entry option, because dropdowns for host group and host selection have been replaced with multiselect fields in the frontend.
The EnableRemoteCommands parameter is now deprecated. Remote commands are still disabled by default, but in the new configuration files that is expressed by using the new DenyKey parameter (
DenyKey=system.run[*]). Remote commands can be enabled by removing (or commenting out)
The maximum allowed length of an item key has been raised from 256 to 2048 characters.
It is now possible to manually clear the SNMP cache on Zabbix server and proxy. Due to adding a new runtime control option, Net-SNMP version 5.3.0 or higher is now required for SNMP support.