3 Triggers - 1 Configuring a trigger - 《Zabbix 5.0 MANUAL》

Overview

Click on Triggers in the row of the host
Enter parameters of the trigger in the form

Configuration

The Trigger tab contains all the essential trigger attributes.

All mandatory input fields are marked with a red asterisk.

In addition the Inherited and trigger tags option allows to view tags defined on template level, if the trigger comes from that template. If there are multiple templates with the same tag, these tags are displayed once and template names are separated with commas. A trigger does not “inherit” and display host-level tags.

Parameter Description

Name/Value Set custom tags to mark trigger events.
Tags are a pair of tag name and value. You can use only the name or pair it with a value. A trigger may have several tags with the same name, but different values.
User macros, user macro context, low-level discovery macros and macro with {{ITEM.VALUE}}, {{ITEM.LASTVALUE}} and low-level discovery macros are supported in event tags. Low-level discovery macros can be used inside macro context.
{TRIGGER.ID} macro is supported in trigger tag values. It may be useful for identifying triggers created from trigger prototypes and, for example, suppressing problems from these triggers during maintenance.
If the total length of expanded value exceeds 255, it will be cut to 255 characters.
See all macros supported for event tags.
can be used for event correlation, in action conditions and will also be seen in Monitoring → Problems or the Problems widget.
Supported since Zabbix 3.2.0.

Parameter	Description
Name/Value	Set custom tags to mark trigger events. Tags are a pair of tag name and value. You can use only the name or pair it with a value. A trigger may have several tags with the same name, but different values. User macros, user macro context, low-level discovery macros and macro with `{{ITEM.VALUE}}`, `{{ITEM.LASTVALUE}}` and low-level discovery macros are supported in event tags. Low-level discovery macros can be used inside macro context. {TRIGGER.ID} macro is supported in trigger tag values. It may be useful for identifying triggers created from trigger prototypes and, for example, suppressing problems from these triggers during maintenance. If the total length of expanded value exceeds 255, it will be cut to 255 characters. See all macros supported for event tags. can be used for event correlation, in action conditions and will also be seen in Monitoring → Problems or the Problems widget. Supported since Zabbix 3.2.0.

The Dependencies tab contains all the dependencies of the trigger.

Click on Add to add a new dependency.

You can also configure a trigger by opening an existing one, pressing the Clone button and then saving under a different name.

Testing expressions

It is possible to test the configured trigger expression as to what the expression result would be depending on the received value.

Following expression from an official template is taken as an example:

In the Expression constructor, all individual expressions are listed. To open the testing window, click on Test below the expression list.

In the testing window you can enter sample values (“80, 70, 0, 1” in this example) and then see the expression result, by clicking on the Test button.

The result of the individual expressions as well as the whole expression can be seen.

“TRUE” result means the specified expression is correct. In this particular case A, “80” is greater than {$TEMP_WARN} specified value, “70” in this example. Respectively, “TRUE” result appears.

Chosen Expression type is “OR”/“TRUE”. If at least one of the specified conditions (A or B in this case) is TRUE, overall result will be TRUE as well. That means, current value exceeds the warning value and a Problem has occurred.