How do I convert a 0/1 value set to a pair of strings (e.g. down/up)?

[mj-jbell]

I'm trying to set up port monitoring on a Zabbix server, and currently this is logged as a 0 if the port's down, and a 1 if the port is up.

The goal is to have a trigger fire, with a subject line something like this:

PROBLEM: HTTP port on web-server-01 is DOWN

... and this ...

OK: HTTP port on web-server-01 is UP

...

So I've tried to do this by configuring the trigger something like this:

The HTTP port on {HOST.NAME} is {ITEM.VALUE}

But this isn't terribly useful since it only says that it's 0 or 1 ... so is there a way to translate this 0 or 1 to "DOWN" or "UP"?

[LenR]

See value mapping

[mj-jbell]

DERP.

I got it, thanks.

[aib]

But this isn't terribly useful since it only says that it's 0 or 1 ... so is there a way to translate this 0 or 1 to "DOWN" or "UP"?

By default, Zabbix have some "Value Mapping" presets.
One has a name "Service State" and mapping 0 & 1 to Down & Up.

So, the easiest way to use it - configure your item to use "Service State" value mapping for the field "Show value"

[tchjts1]

As Aib mentioned, value mapping will help in some areas, but not all.

At least in my 2.0.9 setup, a graph will still indicate only the return code instead of the value mapping - unfortunately. I think maybe this was going to be addressed in a newer release than what I am running.

My workaround is simply to create a custom graph and in the graph description I put the legend, such as:
"My App Services 0 = Down; 1 = Up" or whatever the case may be.

Alerts will correctly show the value mapping along with the return code though without any modification.

[dstrickler]

As of Zabbix v6.x, you can see a post here that explains how to do it. In short, you can use Value Mapping on a Template to make it pretty easy. While my example uses the words Up and Down, you can change it to anything you want. Or you can expand it to handle more than two values.