Puppet with Hiera - Custom variables

[Stephen]

Hello,

At the moment I do not use Hiera to store any config at all, but I want to.

Currently, I can use the variable "$mysettings::config::envtype" in my classes, as long as I put 'require mysettings::config' at the head of those classes.

In my environment, I use this variable to hold "PROD", "DEV", "PERFTEST", "QA", etc (It derives this from IP subnet).


I have this in my hiera.yaml file, which successfully pulls the data from, for example, the os/RedHat.yaml file when needed.
  - name: "OS defaults"
    path: "os/%{facts.os.family}.yaml"
   

   
How do I use my variable above in the same way? I've tried the below, and a number of other syntaxes, and can't get it working. ie. I want to retrieve config from the envtype/DEV.yaml file, but it's not returning anything.
  - name: "Envtype data"
    path: "envtype/%{'mysettings::config::envtype'}.yaml"
   

Apologies if this is explained in documentation, I have gone over it and it's just not clicking for me. Should I be doing it this way, should I be using custom facts, should I be doing something else?

I'm on Puppet PE v2017.1.0.

Thanks for any help.

[Arnau]

Hi,

I don't know if there's another (or better) way, but I use a custom fact for the environment. Then you can tell hiera to use this new fact in the hierarchy tree:

As an example:
node:

/etc/facter/facts.d/local.yaml

---

env: "prod"

puppet server:
/etc/puppet/hiera.yaml

---

:backends:

  - yaml

  - eyaml

:hierarchy:

  - "%{environment}/hieradb/%{::env}/cert/%{::clientcert}"

Notice that %{environment} refers to puppet environemnt. (In my case those are the git branches that I create).

HTH,

Arnau

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[Stephen]

Thank you very much for this. I have successfully tested it!

I perfer the idea of Puppet 'knowing' which yaml file to use by way of a passed variable, rather than having to read from disk for it (and if there is a way to do this, I'd like to hear it).

But your solution works and it's not complicated, so thank you :)

Kind regards,
Stephen

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[Arnau]

Hi,

the typical scenario for running nodes in differnet environments is to use r10k.

https://docs.puppet.com/pe/latest/r10k_run.html

git + r10k . It's a well known combo that works perefctly.

Best,

Arnau

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