In Zabbix 6.0, service monitoring functionality has been reworked significantly (see What's new in Zabbix 6.0.0 for the list of changes).
This page describes how services and SLAs defined in earlier Zabbix versions are changed during an upgrade to Zabbix 6.0 or newer.
In older Zabbix versions, services had two types of dependencies: soft and hard. After an upgrade, all dependencies will become equal.
If a service "Child service" was previously linked to "Parent service 1" via hard dependency and additionally "Parent service 2" via soft dependency, after an upgrade the "Child service" will simply be linked to two parent services ("Parent service 1" and "Parent service 2").
The 'Status calculation algorithm' will be upgraded using the following rules:
If you have upgraded from Zabbix pre-6.0 to Zabbix 6.0.0, 6.0.1 or 6.0.2, see Known issues for Zabbix 6.0 documentation.
Previously, SLA targets had to be defined for each service separately. Since Zabbix 6.0, SLA has become a separate entity which contains information about service schedule, expected service level objective (SLO) and downtime periods to exclude from the calculation. Once configured, an SLA can be assigned to multiple services through service tags.
During an upgrade:
SLA:<ID>and the same tag will be specified in the Service tags parameter of the corresponding SLA.