How to add custom variables to a template?

[Napsty]

Context

Icinga2 supports the definition of custom variables in the templates, for example host templates. These custom vars are then automatically applied on all the Hosts using this host template.

template Host "generic-host" {
  check_command = "hostalive_4"
  max_check_attempts = 3
  check_interval = 1m
  retry_interval = 30s
  vars.custom_var = "Feuerstein"
}

But how can this be added with the Puppet module?

Expected Behavior

Adding the custom variable to the host template "generic-host", configured in Puppet:

profile::icinga2master::icinga2_object_host:
  generic-host:
    check_command: hostalive_4
    check_interval: 1m
    max_check_attempts: 3
    retry_interval: 30s
    vars.custom_var: 'Feuerstein'
    target: /etc/icinga2/conf.d/templates.conf
    template: true

Results in the following template in the final config file (/etc/icinga2/conf.d/templates.conf):

template Host "generic-host" {
  check_command = "hostalive_4"
  max_check_attempts = 3
  check_interval = 1m
  retry_interval = 30s
  vars.custom_var = "Feuerstein"
}

Current Behavior

Puppet run falls on its nose, stating that:

Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Resource Statement, Icinga2::Object::Host[generic-host]: has no parameter named 'vars.custom_var' (file: /etc/puppetlabs/code/environments/production/site/profile/manifests/icinga2master.pp, line: 35) on node icinga2
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

I also tried it with vars.custom_var: '-:Feuerstein' but same error.

Your Environment

• Module version (puppet module list): icinga-icinga2 (v3.3.1)
• Puppet version (puppet -V): 7.19.0
• Operating System and version: Ubuntu 22.04

Thanks for any hints.

[lbetz]

Hi Claudio,

vars has to be a hash. So your yaml code must look like that:

profile::icinga2master::icinga2_object_host:
  generic-host:
    check_command: hostalive_4
    check_interval: 1m
    max_check_attempts: 3
    retry_interval: 30s
    vars
      custom_var: Feuerstein
    target: /etc/icinga2/conf.d/templates.conf
    template: true

[Napsty]

@lbetz Lennart, as always, you're faster than I documenting the current problem internally ;-). Will try this!

[lbetz]

I am on vacation at home.

On 21. Sep 2022, at 09:37, Claudio Kuenzler @.***> wrote:

@lbetz https://github.com/lbetz Lennart, as always, you're faster than I documenting the current problem internally ;-). Will try this!

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[Napsty]

Working, thanks for the quick solution!