Hi Tobias,
On 09.09.2017 15:49, Tobias Köck wrote:
> I am wondering what is the difference between a macro access with
>
> ... = $host.variable$
This is a simple way to let the user include macros in most of the
variables, so the are evaluated dynamically on check execution etc.
> and
>
> ... = macro($host.variable$)?
As of your example in the other mails of this thread, the example is
used inside {{ }}, a custom function.
Now this custom function is evaluated when the variable is retrieved,
and the macro() functions helps you to get the values "when you need them".
Summary:
vars.something = "$host.name$"
// is evaluated when Icinga needs it
vars.something = {{
var name = macro("$host.name$")
return name + ".example.com"
}}
// Helps you with custom implementations
An example:
https://www.icinga.com/docs/icinga2/latest/doc/08-advanced-topics/#access-object-attributes-at-runtime
Regards
Markus Frosch
--
Icinga Open Source Monitoring
https://www.icinga.com
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