Thanks, now I understand - this wasn't clear from the docs.
Am 28.05.2015 um 20:04 schrieb Michael Friedrich:
> Am 27.05.2015 um 07:27 schrieb Klaus Muth:
>> Hi
>>
>> I'm trying to define and use a global function in icinga2 and failing
>> miserable:
>>
>> in functions.conf:
>> function test(str) {
>> str = str.replace("X", "u")
>> return "bla"+str.replace("bla", "blubb")
>> }
>>
>> this does reload without error.
>>
>> In host object:
>> object Host "gnarf" {
>> import "generic-host"
>> # more config [...]
>> action_url = "bla" + test("XXbrrrm bla")
>> }
>>
>> gives me a
>> critical/config: Error: Invalid field access (for value of type 'Host'):
>> 'test'
>
> Icinga 2 is right about that. Using user-defined functions in object
> attributes are limited to a defined scope. Currently that's just
> supported for
>
> * custom attributes
> * set_if in command arguments w/ boolean return values
> * command attribute in *Command objects
> * expressions (assign/ignore where) w/ boolean return values
>
> Given that you are using string replace two times, it would be more
> reasonable at the time to define a local variable and use built-in
> prototype functions for the string type.
> http://docs.icinga.org/icinga2/latest/doc/module/icinga2/chapter/library-reference#string-type
>
> imagine /etc/icinga2/conf.d # cat test.conf
> ...
> object Host "foo" {
> import "generic-host"
> vars.bla = "abcdefghijklmnopqrstuvwxyz"
> var t = vars.bla.replace("a", "b")
> var u = t.replace("b", "c")
>
> action_url = "ß" + t
> }
>
> imagine /etc/icinga2/conf.d # icinga2 object list --name foo
> Object 'foo' of type 'Host':
> % declared in '/etc/icinga2/conf.d/test.conf', lines 6:1-6:17
> * __name = "foo"
> * action_url = "ßbbcdefghijklmnopqrstuvwxyz"
> % = modified in '/etc/icinga2/conf.d/test.conf', lines 12:3-12:23
> * address = ""
> * address6 = ""
> * check_command = "hostalive"
> % = modified in '/etc/icinga2/conf.d/templates.conf', lines 19:3-19:29
> * check_interval = 60
> % = modified in '/etc/icinga2/conf.d/templates.conf', lines 16:3-16:21
> * check_period = ""
> * command_endpoint = ""
> * display_name = "foo"
> * enable_active_checks = true
> * enable_event_handler = true
> * enable_flapping = false
> * enable_notifications = true
> * enable_passive_checks = true
> * enable_perfdata = true
> * event_command = ""
> * flapping_threshold = 30
> * groups = [ ]
> * icon_image = ""
> * icon_image_alt = ""
> * max_check_attempts = 5
> % = modified in '/etc/icinga2/conf.d/templates.conf', lines 15:3-15:24
> * name = "foo"
> * notes = ""
> * notes_url = ""
> * retry_interval = 30
> % = modified in '/etc/icinga2/conf.d/templates.conf', lines 17:3-17:22
> * templates = [ "foo", "generic-host" ]
> % = modified in '/etc/icinga2/conf.d/test.conf', lines 6:1-6:17
> % = modified in '/etc/icinga2/conf.d/templates.conf', lines 14:1-14:28
> * type = "Host"
> * vars
> * bla = "abcdefghijklmnopqrstuvwxyz"
> % = modified in '/etc/icinga2/conf.d/test.conf', lines 8:3-8:41
> * volatile = false
> * zone = ""
>
>
>
> Given user-defined functions in combination with object attributes I
> remember discussing that with Gunnar a while ago, but IIRC this is not
> that simple to support, neither context-wise nor implementation-wise.
> Although I cannot find any referenced issue in the development tracker,
> so feel free to propose a feature request, or sponsor a patch even.
>
> So you'll see, Icinga 2 is more than just playing with stuff. But
> certainly you'll acknowledge the fact that developers should enjoy their
> software while granting you free license and usage.
>
> Regards,
> Michael
>
> PS: https://twitter.com/dnsmichi/status/603984281514434561
>
>
>
Freundliche Grüße
--
Klaus Muth
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