Reflect provider change in puppet-openstacklib

With the creation of the new openstack_config provider, some processing
that was done in nova_config has been centralized in
openstack_config.

Impacted methods are :

  * section
  * setting
  * separator

Also, this commit adds the fact that, when passing a specific string
(ensure_absent_val) the provider will behave as if ensure => absent was
specified. '<SERVICE DEFAULT>' is the default value for
ensure_absent_val.

The use case is the following :

nova_config { 'DEFAULT/foo' : value => 'bar' } # will work as usual

nova_config { 'DEFAULT/foo' : value => '<SERVICE DEFAULT>' } # will mean absent

That means that all the current :

if $myvar {
  nova_config { 'DEFAULT/foo' : value => $myvar }
} else {
  nova_config { 'DEFAULT/foo' : ensure => absent }
}

can be removed in favor of :

nova_config { 'DEFAULT/foo' : value => $myvar }

If for any reason '<SERVICE DEFAULT>' turns out to be a valid value for
a specific parameter. One could by pass that doing the following :

nova_config { 'DEFAULT/foo' : value => '<SERVICE DEFAULT>',
ensure_absent_val => 'foo' }

Change-Id: I7ba9bf6c07edd7248e401ef5f55abf6e3464a0a3
Depends-On: I0eeebde3aac2662cc7e69bfad7f8d2481463a218

README.md

@@ -68,6 +68,36 @@ Implementation
 
 nova is a combination of Puppet manifest and ruby code to delivery configuration and extra functionality through types and providers.
 
+### Types
+
+#### nova_config
+
+The `nova_config` provider is a children of the ini_setting provider. It allows one to write an entry in the `/etc/nova/nova.conf` file.
+
+```puppet
+nova_config { 'DEFAULT/verbose' :
+  value => true,
+}
+```
+
+This will write `verbose=true` in the `[DEFAULT]` section.
+
+##### name
+
+Section/setting name to manage from `nova.conf`
+
+##### value
+
+The value of the setting to be defined.
+
+##### secret
+
+Whether to hide the value from Puppet logs. Defaults to `false`.
+
+##### ensure_absent_val
+
+If value is equal to ensure_absent_val then the resource will behave as if `ensure => absent` was specified. Defaults to `<SERVICE DEFAULT>`
+
 Limitations
 -----------
 

lib/puppet/provider/nova_config/ini_setting.rb

@@ -1,32 +1,10 @@
 Puppet::Type.type(:nova_config).provide(
   :ini_setting,
-  :parent => Puppet::Type.type(:ini_setting).provider(:ruby)
+  :parent => Puppet::Type.type(:openstack_config).provider(:ini_setting)
 ) do
 
-  # the setting is always default
-  # this if for backwards compat with the old puppet providers for nova_config
-  def section
-    resource[:name].split('/', 2)[0]
-  end
-
-  # assumes that the name was the setting
-  # this is to maintain backwards compat with the the older
-  # stuff
-  def setting
-    resource[:name].split('/', 2)[1]
-  end
-
-  def separator
-    '='
-  end
-
   def self.file_path
     '/etc/nova/nova.conf'
   end
 
-  # this needs to be removed. This has been replaced with the class method
-  def file_path
-    self.class.file_path
-  end
-
 end

lib/puppet/type/nova_config.rb

@@ -3,6 +3,7 @@ Puppet::Type.newtype(:nova_config) do
   ensurable
 
   newparam(:name, :namevar => true) do
+    desc 'Section/setting name to manage from nova.conf'
     newvalues(/\S+\/\S+/)
   end
 
@@ -40,6 +41,11 @@ Puppet::Type.newtype(:nova_config) do
     defaultto false
   end
 
+  newparam(:ensure_absent_val) do
+    desc 'A value that is specified as the value property will behave as if ensure => absent was specified'
+    defaultto('<SERVICE DEFAULT>')
+  end
+
   autorequire(:package) do
     'nova-common'
   end

spec/unit/provider/nova_config/ini_setting_spec.rb

@@ -14,6 +14,17 @@ $LOAD_PATH.push(
     'inifile',
     'lib')
 )
+$LOAD_PATH.push(
+  File.join(
+    File.dirname(__FILE__),
+    '..',
+    '..',
+    '..',
+    'fixtures',
+    'modules',
+    'openstacklib',
+    'lib')
+)
 require 'spec_helper'
 provider_class = Puppet::Type.type(:nova_config).provider(:ini_setting)
 describe provider_class do
@@ -35,4 +46,23 @@ describe provider_class do
     expect(provider.section).to eq('dude')
     expect(provider.setting).to eq('foo')
   end
+
+  it 'should ensure absent when <SERVICE DEFAULT> is specified as a value' do
+    resource = Puppet::Type::Nova_config.new(
+      {:name => 'dude/foo', :value => '<SERVICE DEFAULT>'}
+    )
+    provider = provider_class.new(resource)
+    provider.exists?
+    expect(resource[:ensure]).to eq :absent
+  end
+
+  it 'should ensure absent when value matches ensure_absent_val' do
+    resource = Puppet::Type::Nova_config.new(
+      {:name => 'dude/foo', :value => 'foo', :ensure_absent_val => 'foo' }
+    )
+    provider = provider_class.new(resource)
+    provider.exists?
+    expect(resource[:ensure]).to eq :absent
+  end
+
 end