Change of trigger status is the most frequent and most important source of events.
Each time the trigger changes its state, an event is generated. The event contains details of the trigger state's change - when did it happen and what the new state is.
Zabbix periodically scans the IP ranges defined in network discovery rules. Frequency of the check is configurable for each rule individually. Once a host or a service is discovered, a discovery event (or several events) are generated.
Zabbix generates the following events:
|Service Up||Every time Zabbix detects active service.|
|Service Down||Every time Zabbix cannot detect service.|
|Host Up||If at least one of the services is UP for the IP.|
|Host Down||If all services are not responding.|
|Service Discovered||If the service is back after downtime or discovered for the first time.|
|Service Lost||If the service is lost after being up.|
|Host Discovered||If host is back after downtime or discovered for the first time.|
|Host Lost||If host is lost after being up.|
Active agent auto-registration creates events in Zabbix.
If configured, active agent auto-registration can happen when a previously unknown active agent asks for checks. The server adds a new auto-registered host, using the received IP address and port of the agent.
For more information, see the active agent auto-registration page.
Internal events happen when:
Internal events are supported since Zabbix 2.2. The aim of introducing internal events is to allow users to be notified when any internal event takes place, for example, an item becomes unsupported and stops gathering data.