Custom variable precedence. Not working?

Icinga Web Modules Icinga Director
1

I’m having a problem with the precedence of custom variables. I have an apply rule to check for space in windows drives defined in a array with predefined thresholds.

apply Service for (config in host.vars.wdrive) {

name = "Disk " + config + ":"

import "st_windisk_snmp"

icon_image = "harddisk.png"

assign where host.vars.snmp && match("w*", host.vars.OS)

vars.critical = "98"

vars.path = config

vars.warning = "95"

import DirectorOverrideTemplate

}

I have created a new host which I (meaning the user) want to have different thresholds so I set the “critical” and “warning” custom vars to 92 and 90 (instead of 98 / 95) in the host itself.

object Host "TRUE_HOST.TRUE.DOMAIN." {

import "Standard-Host"

import "Windows_Server"

display_name = "TRUE_HOST"

address = "10.10.10.10"

notes = "Pizza Server"

groups = [ "pizzas" ]

vars.OS = "w2019"

vars.critical = "92"

vars.host_type = "virt"

vars.location = "par"

vars.services = [ "A Real Service", "Another Real Service" ]

vars.snmp = true

vars.warning = "90"

vars.wdrive = [ "D", "E" ]

}

After deploying the configuration I still got the same thresholds on the check instead of the ones defined at host level. The inspect check shows:

‘/path/here/check_windisk_snmp.pl’ ‘10. 10.10.10’ ‘public’ ‘95’ ‘98’ ‘E’

I thought that variables defined at the host level took precedence over variables defined anywhere else. Isn’t that so?

Versions 
Program Version	2.11.3-1
Icinga web 2.8.2
PHP Version 7.3.11
director 1.7.2
2

No surprise it was my faulty understanding of what the heck is going on with custom variables, findings below (may still be wrong but are working):

If you setup values in the apply rule they take precedence and that’s it. So the fix:

  • Leave empty values in Service rule (inherited values are OK)
  • Set what used to be the default values of the Apply rule in the appropiate Host Template
  • Override the host template defaults in the host/s you need to have diffferent check values.

That works. Perhaps some troubled soul in the future will find it helpful.