Different var syntax

[tn-mm]

Hi,

I want to create an object file like this:

apply Service for (hdisk => config in host.vars.disks)  {
  import "generic-service"

  check_command = "disk"
  command_endpoint = host.name
  **vars += config**
  vars.disk_wfree = "10%"
  vars.disk_cfree = "5%"
  assign where "config.disk"
}

I think its not possible, or does anybody knows a way?

icinga2_var:
  domain.de:
    - name: disk
      type: Service
      imports:
        - generic-service
      apply: true
      apply_for: hdisk => config in host.vars.disks
      file: 'zones.d/global-templates/services.conf'
      check_command: disk
      command_endpoint: host.name
      vars:
        - disk_wfree: "10%"
        - disk_cfree: "5%"
      assign: config.disk

Edit: Better readability

[Donien]

Hi,

could you explain what exactly you try to achieve? I'm not sure whether the vars += config part is the relevant one.

Also, how does host.vars.disks look like at your host? Is it an actual array, a dictionary, etc.?

Please try to use code blocks and proper indentation next time to make everything more readable for people who'd like to help :)

---

Small example achieving vars += config:

vars:
  icinga2_objects:
    - name: host1
      type: Host
      file: "local.d/testing.conf"
      address: "localhost"
      check_command: "hostalive4"
      vars:
        disks:
          - "disk1"
          - "disk2"
          - "disk3"
    - name: Disk
      type: Service
      file: "local.d/testing.conf"
      apply: true
      apply_for: hdisk => config in host.vars.disks
      check_command: disk
      vars: + config
      assign:
        - host.vars.disks

The above results in the following

object Host "host1" {

  address = "localhost"
  check_command = "hostalive4"
  vars.disks = [ "disk1", "disk2", "disk3", ]
}
 
apply Service for (hdisk => config in host.vars.disks)  {

  check_command = "disk"
  vars += config
  assign where host.vars.disks
}

As you can probably tell, you can't have both vars += config and vars.foo = "bar" at the same time (as far as I can tell).

---

Example achieving vars.foo = "bar"

vars:
  icinga2_objects:
    - name: host1
      type: Host
      file: "local.d/testing.conf"
      address: "localhost"
      check_command: "hostalive4"
      vars:
        disks:
          - "disk1"
          - "disk2"
          - "disk3"
    - name: Disk
      type: Service
      file: "local.d/testing.conf"
      apply: true
      apply_for: config in host.vars.disks
      check_command: disk
      vars:
        foo: "bar"
        disk_partitions: config
        disk_wfree: "10%"
      assign:
        - host.vars.disks

->

object Host "host1" {

  address = "localhost"
  check_command = "hostalive4"
  vars.disks = [ "disk1", "disk2", "disk3", ]
}
 
apply Service for (config in host.vars.disks)  {

  check_command = "disk"
  vars.foo = "bar"
  vars.disk_partitions = config
  vars.disk_wfree = "10%"
  assign where host.vars.disks
}

[tn-mm]

Hi.
Thank you for your answer.

What I want to achieve is that we use the configuration from host.
vars += config

and overwrite 2 values by default:

vars.disk_wfree = "10%"
vars.disk_cfree = "5%"

With Icinga it is working. But there is no way with the collection I think

[Donien]

Hm, this sounds tricky or even 'impossible'.
If I define a dictionary key twice, the last one overwrites the previous ones.

my_dict:
  varname: "first value"
  varname: "second value"

my_dict.varname = "second value"

To implement vars += config followed by vars.some_key = "some value" we'd need to define

vars: + config
vars:
  some_key: "some value"

This is not possible AFAIK.

[mkayontour]

You could define your defaults in a template an import it to your assign rule. Then the Icinga mechanics will solve the problem for you.

Just use

imports:
  - mydefault-template