Custom type and provider

[Rafael Tomelin]

Hi guys,

I am creating a type in custom provider, but I am not able to understand the following question.

I created a basic type to understand the concept of things, as follows:

Puppet::Type.newtype(:mydir) do

    @doc = "First custom type."

    

    ensurable do

        defaultvalues

        defaultto :present

    end

    newparam(:name, :namevar => true) do

    end

    newparam(:install_location) do

    end

end

After creating the provider, but does not recognize the same and displays the following error:

Error: Could not find a suitable provider for mydir

Notice: Applied catalog in 0.63 seconds

Puppet::Type.type(:mydir).provide(:linux) do

    defaultfor :operatingsystem => :linux

    confine    :operatingsystem => :linux

    commands :mkdir => "mkdir"

    commands :rm => "rm"

    

    def exists?

        Puppet.info("checking if is already deployed")

        deploy_dir = "#{resource[:install_location]}/#{resource[:name]}"

        File.directory?(deploy_dir) and Dir.entries(deploy_dir).size > 2

    end

    def create

        Puppet.info("Deploying the appliction")

        deploy_dir = "#{resource[:install_location]}/#{resource[:name]}"

        mkdir('-p', deploy_dir)

    end

    def destroy

        Puppet.info("Removing the appliction")

        deploy_dir = "#{resource[:install_location]}/#{resource[:name]}"

        rm('-rf',deploy_dir)

    end

end

  What I did not envisage is how Puppet identifies the provider to be used in the OS?

--

Atenciosamente,

Rafael Tomelin

skype: rafael.tomelin

E-mail: rafael....@gmail.com

RHCE      - Red Hat Certified Engineer
PPT-205 - Puppet Certified Professional 2017
Zabbix    - ZABBIX Certified Specialist
LPI3 
ITIL v3

[Nick Lewis]

It looks like the trouble here is that "linux" isn't a valid value for operatingsystem. If you look at some examples in puppet, you can see that common values of operatingsystem are like "fedora", "centos", "suse". The fact you want to use here is osfamily, which is "linux".

 

--

Atenciosamente,

Rafael Tomelin

skype: rafael.tomelin

E-mail: rafael....@gmail.com

RHCE      - Red Hat Certified Engineer
PPT-205 - Puppet Certified Professional 2017
Zabbix    - ZABBIX Certified Specialist
LPI3 
ITIL v3

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[Rafael Tomelin]

Yes,

Esuqeci had already altered or removed the following lines:

     defaultfor: operatingsystem =>: linux

     confine: operatingsystem =>: linux

But it had no effect

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[Martin Alfke]

> On 21. Sep 2018, at 22:57, Rafael Tomelin <rafael....@gmail.com> wrote:
>
> Yes,
>
> Esuqeci had already altered or removed the following lines:
> defaultfor: operatingsystem =>: linux
> confine: operatingsystem =>: linux

defaultfor: kernel => :Linux

operatingsystem is something like suse, debian, centos
osfamily is something like redhat or debian

hth,
Martin

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[David Schmitt]

Hi Rafael,

if you are just starting out with this, I'd highly recommend looking into the Resource API. It makes the development of types much easier, is a supported part of this week's puppet 6 release, and available as a separate download for previous puppet versions. The PDK also has support for getting you started with a ready to go skeleton using 'pdk new provider'.

See https://puppet.com/docs/puppet/6.0/custom_resources.html for all the details.

Cheers, David

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Cheers, David

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[Rafael Tomelin]

Hi David Schmitt,

I create de new module, class and provider with pdk the according this site puppet.  My puppet is version 'puppet --version . 5.5.6'.

But, the return error: Could not autoload puppet/type/foo: no such file to load -- puppet/resource_api 

My type is:

cat lib/puppet/type/foo.rb 

require 'puppet/resource_api'

Puppet::ResourceApi.register_type(

  name: 'foo',

  docs: <<-EOS,

      This type provides Puppet with the capabilities to manage ...

    EOS

  features: [],

  attributes:   {

    ensure:      {

      type:    'Enum[present, absent]',

      desc:    'Whether this resource should be present or absent on the target system.',

      default: 'present',

    },

    name:        {

      type:      'String',

      desc:      'The name of the resource you want to manage.',

      behaviour: :namevar,

    },

  },

)

My provider:

cat lib/puppet/provider/foo/foo.rb 

require 'puppet/resource_api/simple_provider'

# Implementation for the foo type using the Resource API.

class Puppet::Provider::Foo::Foo < Puppet::ResourceApi::SimpleProvider

  def get(_context)

    [

      {

        name: 'foo',

        ensure: 'present',

      },

      {

        name: 'bar',

        ensure: 'present',

      },

    ]

  end

  def create(context, name, should)

    context.notice("Creating '#{name}' with #{should.inspect}")

  end

  def update(context, name, should)

    context.notice("Updating '#{name}' with #{should.inspect}")

  end

  def delete(context, name)

    context.notice("Deleting '#{name}'")

  end

end

My init.pp

class first_type {

  foo{ 'my_type':

    ensure => present,

  }

}

What`s problem : Could not autoload puppet/type/foo: no such file to load -- puppet/resource_api 

The provider write the ruby, is possible create provider with python? If yes, is change ruby to python?

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--

[David Schmitt]

Hi Rafael,

on puppet versions prior to puppet6, you need to install the puppet-resource_api gem to support the provider. You can use the puppetlabs-resource_api module for that.

Cheers, David

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[Rafael Tomelin]

Hi,

Thanks, solved!

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