Add support for PowerDNS 4 backend

Change-Id: Ie9cc92622e1bf281fc07c97f480f5a3c16b7e6f3

manifests/backend/pdns4.pp

@@ -0,0 +1,74 @@
+# == Class designate::backend::pdns4
+#
+# Configure PowerDNS 4 as backend
+#
+# == Parameters
+#
+# [*api_token*]
+#  (Required) Token string to authenticate with the PowerDNS Authoritative
+#  Server.
+#
+# [*pdns4_hosts*]
+#  (Optional) Host running DNS service.
+#  Defaults to ['127.0.0,1'].
+#
+# [*pdns4_port*]
+#  (Optional) TCP port to connect to DNS service.
+#  Defaults to 53.
+#
+# [*mdns_hosts*]
+#  (Optional) Array of hosts where designate-mdns service is running.
+#  Defaults to ['127.0.0.1'].
+#
+# [*mdns_port*]
+#  (Optional) TCP Port to connect to designate-mdns service.
+#  Defaults to 5354.
+#
+# [*api_endpoint*]
+#  (Optional) URL to access the PowerDNS Authoritative Server.
+#  Defaults to 'http://127.0.0.1:8081'.
+#
+# [*tsigkey_name*]
+#  (Optional) Name of TSIGKey.
+#  Defaults to undef.
+#
+# [*manage_pool*]
+#  (Optional) Manage pools.yaml and update pools by designate-manage command
+#  Defaults to true
+#
+class designate::backend::pdns4 (
+  $api_token,
+  $pdns4_hosts  = ['127.0.0.1'],
+  $pdns4_port   = 53,
+  $mdns_hosts   = ['127.0.0.1'],
+  $mdns_port    = 5354,
+  $api_endpoint = 'http://127.0.0.1:8081',
+  $tsigkey_name = undef,
+  $manage_pool  = true,
+) {
+
+  include designate::deps
+  include designate::params
+
+  if $manage_pool {
+    file { '/etc/designate/pools.yaml':
+      ensure  => present,
+      path    => '/etc/designate/pools.yaml',
+      owner   => $designate::params::user,
+      group   => $designate::params::group,
+      mode    => '0640',
+      content => template('designate/pdns4-pools.yaml.erb'),
+      require => Anchor['designate::config::begin'],
+      before  => Anchor['designate::config::end'],
+    }
+
+    exec { 'designate-manage pool update':
+      command     => 'designate-manage pool update',
+      path        => '/usr/bin',
+      user        => $designate::params::user,
+      refreshonly => true,
+      require     => Anchor['designate::service::end'],
+      subscribe   => File['/etc/designate/pools.yaml'],
+    }
+  }
+}

releasenotes/notes/pdns4-07768cbace039aee.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The new ``designate::backend::pdns4`` class has been added. This class
+    supports setting up PowerDNS 4 backend.

spec/classes/designate_backend_pdns4_spec.rb

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+#
+# Unit tests for designate::backend::pdns4
+#
+require 'spec_helper'
+
+describe 'designate::backend::pdns4' do
+
+  shared_examples 'designate-backend-pdns4' do
+
+    let :params do
+      { :api_token => 'mytoken' }
+    end
+
+    context 'with default params' do
+      it 'configures named and pool' do
+        is_expected.to contain_file('/etc/designate/pools.yaml').with(
+          :ensure => 'present',
+          :path   => '/etc/designate/pools.yaml',
+          :owner  => 'designate',
+          :group  => 'designate',
+          :mode   => '0640',
+        )
+        is_expected.to contain_exec('designate-manage pool update').with(
+          :command     => 'designate-manage pool update',
+          :path        => '/usr/bin',
+          :user        => 'designate',
+          :refreshonly => true,
+        )
+      end
+    end
+
+    context 'with pool management disabled' do
+      before do
+        params.merge!({
+          :manage_pool => false
+        })
+      end
+      it 'does not configure pool' do
+        is_expected.to_not contain_file('/etc/designate/pools.yaml')
+        is_expected.to_not contain_exec('designate-manage pool update')
+      end
+    end
+
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      it_behaves_like 'designate-backend-pdns4'
+    end
+  end
+
+end

templates/pdns4-pools.yaml.erb

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+---
+- name: default
+  description: Default pool
+  attributes: {}
+
+  targets:
+<% @pdns4_hosts.each do |pdns4_host| -%>
+    - type: pdns4
+      description: PowerDNS4 DNS Server <%= pdns4_host %>
+
+      masters:
+<% @mdns_hosts.each do |mdns_host| -%>
+        - host: <%= mdns_host %>
+          port: <%= @mdns_port.to_s %>
+<% end -%>
+
+      options:
+        host: <%= pdns4_host %>
+        port: <%= @dns_port.to_s %>
+        api_endpoint: <%= @api_endpoint %>
+        api_token: <%= @api_token %>
+  <%- if @tsigkey_name -%>
+        tsigkey_name: <%= @tsigkey_name %>
+  <%- end -%>
+<% end -%>