Device42 as Puppet ENC

What

A simple integration that allows you to set up and manage External Node Classification for Puppet using Device42.

Why

As a single point of truth for your network, Device42 is a perfect candidate for providing External Node Classification for your Puppet infrastructure.

D42 as a Puppet ENC allows you to manage the classifications of all your Puppet nodes in one place.

Setup (basic, WIP):

• Create a custom field for devices on D42 called "node_classes" that stores JSON. This field can be called whatever you like, but should be unique.

• Fill in settings.yaml with values that match your setup, including the name of your custom field.

• Run pip install -r requirements.txt

• Put your node classification (as JSON) into the "node_classes" custom field on D42. Writing ENC from Puppetlabs

• Switch your Puppet Master's configuration to use ENC

• ex:

  ENC is configured in /etc/puppetlabs/puppet/puppet.conf
  [master]
  	external_nodes = /home/puppetmaster/d42enc/d42_enc_fetcher.py
  	node_terminus = exec

Example:

Test the output of the ENC.

$ ./d42_enc_fetcher.py puppet.example.com --verbose
fetching node classification for: puppet.example.com
d42 appliance host: 192.168.0.1
node_classes_field is set to: node_classes
---
classes:
  environment: production
  listexample:
  - 0
  - 1
  - 2
  - 3
  common:
  example:
    parameters: work

Note: do not use --verbose when ENC is actually in use. Output needs to be only YAML containing the node classification

Content of node_classes on device named puppet.example.com on D42:

{
  "classes": {
    "common": null,
    "example": {
      "parameters": "work"
    },
    "listexample": [0,1,2,3],
    "environment": "production"
  }
}

Upcoming Features / TODO

• Revisit custom field data type. Perhaps use native YAML instead of JSON
• Testing alongide the standard (Pupppet D42 Integration)[https://github.com/device42/puppet_to_device42_sync_py]
• Further integration examples.