[dev.icinga.com #11402] Explain how to use functions for wildcard matches for arrays and/or dictionaries in assign where expressions

[icinga-migration]

This issue has been migrated from Redmine: https://dev.icinga.com/issues/11402

Created by dedkus on 2016-03-17 10:31:17 +00:00

Assignee: mfriedrich
Status: Resolved (closed on 2016-03-17 14:53:53 +00:00)
Target Version: 2.4.5
Last Update: 2016-04-20 08:15:59 +00:00 (in Redmine)

Icinga Version: 2.4.4
Backport?: Already backported
Include in Changelog: 1

---

Hi,
I like to have host templates like
type1-printer-host
type2-printer-host

and assign a group of printer by
object HostGroup "printers-lexmark" {
display_name = "Lexmark Printers"
assign where host.vars.vendor == "lexmark" && match("*printer-host",host.templates))
}

the same with services
apply Service "Alerts" {
display_name = "Status"
import "printer-service"
match("*printer-host",host.templates))
check_command="check_printer"
vars.command="alerts"
}

icinga2 object list --name 'jip-060'

• templates = [ "jip-060", "x950-printer-host", "generic-host" ]
  % = modified in '/etc/icinga2/conf.d/printer-host.conf', lines 35:1-35:21
  % = modified in '/etc/icinga2/conf.d/templates-host.conf', lines 167:1-167:33
  % = modified in '/etc/icinga2/conf.d/templates.conf', lines 14:1-14:28
  --

unfortunaltely it is not evaluated, even checkconfig is finw with it.

Changesets

2016-03-17 14:49:13 +00:00 by mfriedrich e6f1439

Docs: Explain how to use functions for wildcard matches for arrays and/or dictionaries

... in assign where expressions

fixes #11402

2016-03-17 15:29:19 +00:00 by mfriedrich eeda5fe

Docs: Explain how to use functions for wildcard matches for arrays and/or dictionaries

... in assign where expressions

fixes #11402

2016-04-11 08:38:34 +00:00 by mfriedrich 24836a4

Docs: Explain how to use functions for wildcard matches for arrays and/or dictionaries

... in assign where expressions

fixes #11402

2016-04-20 08:06:59 +00:00 by mfriedrich 20cb2e4

Docs: Explain how to use functions for wildcard matches for arrays and/or dictionaries

... in assign where expressions

fixes #11402

---

Relations:

• relates #11402

[icinga-migration]

Updated by mfriedrich on 2016-03-17 14:52:27 +00:00

• Subject changed from apply Service or assign Group with match *printer-host",host.templates not working to Explain how to use functions for wildcard matches for arrays and/or dictionaries in assign where expressions
• Category changed from Configuration to Documentation
• Status changed from New to Assigned
• Assigned to set to mfriedrich
• Target Version set to 2.4.5

Your match() call is wrong, this will never return true. You're comparing a wildcard string with an array of host templates.

match("*printer-host",host.templates)

You could go for a function which takes the host and the wildcard match as arguments.

template Host "lexmark-printer-host" {
  vars.printer_type = "Lexmark"
}

object Host "myprinter" {
  import "generic-host"
  import "lexmark-printer-host"

  address = "192.168.1.1"
}

/* register a global function for the assign where call */
globals.check_host_templates = function(host, search) {
  /* iterate over all host templates and check if the search matches */
  for (tmpl in host.templates) {
    if (match(search, tmpl)) {
      return true
    }
  }

  /* nothing matched */
  return false
}

object HostGroup "printers-lexmark" {
  display_name = "Lexmark Printers"
  /* call the global function and pass the arguments */
  assign where check_host_templates(host, "lexmark*")
}

I've now converted this issue into a documentation issue adding such examples. This should help in the future.

Next time please consider discussing this topic in the community channels such as the forum. It is merely not a bug but a configuration problem.

[icinga-migration]

Updated by mfriedrich on 2016-03-17 14:53:53 +00:00

• Status changed from Assigned to Resolved
• Done % changed from 0 to 100

Applied in changeset e6f1439.

[icinga-migration]

Updated by mfriedrich on 2016-03-17 14:57:54 +00:00

• Relates set to 11106

[icinga-migration]

Updated by mfriedrich on 2016-03-17 15:29:36 +00:00

• Backport? changed from Not yet backported to Already backported