same value line trigger detection

[Spirou]

Hi,

i have an item "SNMP Trap" and it work well. Now i make a trigger and want check if a new line is detected in the item snmptrap but the problem is i have the same line value but ofc not the same date :



How to detect with functions there is a new line appear ?

regards.

[DmitryL]

Hello Spirou,

Did you considered diff function?

Checking if last and previous values differ.
Supported value types: float, int, str, text, log
Returns:
1 - last and previous values differ
0 - otherwise

https://www.zabbix.com/documentation/2.4/manual/appendix/triggers/functions

Best regards,
Dmitry

[Spirou]

Hello Spirou,

Did you considered diff function?

Checking if last and previous values differ.
Supported value types: float, int, str, text, log
Returns:
1 - last and previous values differ
0 - otherwise

https://www.zabbix.com/documentation/2.4/manual/appendix/triggers/functions

Best regards,
Dmitry

Hi,

I try with "nodata" fonction :

{Host:snmptrap[.1.3.6.1.4.1.674.10892.2.0.2000].nodata(30)}=0

but cant acknowledge ....

[Spirou]

The problem with "diff" fonction is it check difference between last and previous "value" and my value is the same ! the only difference is on the "TIMESTAMP" and "LOCAL TIME".

[DmitryL]

Yes, but your value contains timestamp.
So the strings are different.

[Spirou]

right, i try with "diff(log)=1" and it work !
now i must acknowledge the trigger, any idea ?

[DmitryL]

Could you please explain what do you meen by acknowledge trigger?

[Spirou]

ofc,

now i have my trigger detecting new line diff(log) for my trap.
But the trigger is always "disaster" and i dont know how to reset trigger.

[DmitryL]

Ok, so you want to set trigger state to OK.
ACK is something different

What condition would you like to OK state?

[Spirou]

yes

i explain you :

i have my trigger alert (disaster) with OID : x.x.2002
I want reset the x.x.2002 trigger if i have another trigger (x.x.2004) set to 1 !

in another term :

if x.x.2004 = 1 then reset x.x.2002 to 0

ill hope i am clear

regards

[DmitryL]

Ok now i get it

Look in documentation

https://www.zabbix.com/documentation/2.4/manual/config/triggers/expression

Under Hysteresis

You need one trigger, like

({TRIGGER.VALUE}=0 and {server:item.diff(log)}=1) OR
({TRIGGER.VALUE}=1 and {server2.item.diff(log)]=0)

This trigger will fire when your server1 item will get new value line, and go to OK state when server2 item gets new value line.

[Spirou]

Ok i see, i go check tyvm

[Spirou]

I make this but seems not work :

{hostest:snmptrap[.1.3.6.1.4.1.674.10892.2.0.2002].diff(log)}=0 and {hostest:snmptrap[.1.3.6.1.4.1.674.10892.2.0.2004].diff(log)}=0

[Spirou]

should i need to create another trigger ?

what does mean {TRIGGER.VALUE}=1 : is it the value of the current trigger ?

[DmitryL]

Try this. Whole expression is one trigger.

({TRIGGER.VALUE}=0 and {hostest:snmptrap[.1.3.6.1.4.1.674.10892.2.0.2002].diff(log)}=0) OR
({TRIGGER.VALUE}=1 and {hostest:snmptrap[.1.3.6.1.4.1.674.10892.2.0.2004].diff(log)}=0)

{TRIGGER.VALUE}=0 means that trigger is in OK status =1 PROBLEM