Add cell0 database creation in postgresql

Add cell0 database creation like stx patched in [1].
Also fixes an faulty comment in the same resource for mysql.

[1]
https://git.starlingx.io/cgit/stx-integ/tree/config/puppet-modules/openstack/puppet-nova-11.4.0/centos/patches/0003-Create-nova_cell0-database.patch

Change-Id: I4183ed4417c9beeccf8b7355ac217088302d0160

manifests/db/mysql.pp

@@ -34,7 +34,7 @@
 # [*setup_cell0*]
 #   (Optional) Setup a cell0 for the cell_v2 functionality. This option will
 #   be set to true by default in Ocata when the cell v2 setup is mandatory.
-#   Defaults to false
+#   Defaults to true
 #
 
 class nova::db::mysql(

manifests/db/postgresql.pp

@@ -24,12 +24,18 @@
 #    (Optional) Privileges given to the database user.
 #    Default to 'ALL'
 #
+# [*setup_cell0*]
+#   (Optional) Setup a cell0 for the cell_v2 functionality. This option will
+#   be set to true by default in Ocata when the cell v2 setup is mandatory.
+#   Defaults to true
+#
 class nova::db::postgresql(
   $password,
-  $dbname     = 'nova',
-  $user       = 'nova',
-  $encoding   = undef,
-  $privileges = 'ALL',
+  $dbname      = 'nova',
+  $user        = 'nova',
+  $encoding    = undef,
+  $privileges  = 'ALL',
+  $setup_cell0 = true,
 ) {
 
   include ::nova::deps
@@ -42,6 +48,17 @@ class nova::db::postgresql(
     privileges    => $privileges,
   }
 
+  if $setup_cell0 {
+    # need for cell_v2
+    ::openstacklib::db::postgresql { 'nova_cell0':
+      password_hash => postgresql_password($user, $password),
+      dbname        => "${dbname}_cell0",
+      user          => $user,
+      encoding      => $encoding,
+      privileges    => $privileges,
+    }
+  }
+
   Anchor['nova::db::begin']
   ~> Class['nova::db::postgresql']
   ~> Anchor['nova::db::end']

releasenotes/notes/add-cell0-db-postgresql-8bb48f15e4e77554.yaml

@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    nova::db::postgresql now creates the nova_cell0 database
+upgrade:
+  - |
+    nova::db::postgresql now creates the nova_cell0 database, you can disable
+    this behaviour by setting setup_cell0 to false.

spec/classes/nova_db_postgresql_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe 'nova::db::postgresql' do
 
-  shared_examples_for 'nova::db::postgresql' do
+  shared_examples 'nova::db::postgresql' do
     let :req_params do
       { :password => 'pw' }
     end
@@ -16,12 +16,30 @@ describe 'nova::db::postgresql' do
         req_params
       end
 
-      it { is_expected.to contain_postgresql__server__db('nova').with(
-        :user     => 'nova',
-        :password => 'md557ae0608fad632bf0155cb9502a6b454'
+      it { should contain_openstacklib__db__postgresql('nova').with(
+        :password_hash => 'md557ae0608fad632bf0155cb9502a6b454',
+        :dbname        => 'nova',
+        :user          => 'nova',
+        :encoding      => nil,
+        :privileges    => 'ALL',
+      )}
+
+      it { should contain_openstacklib__db__postgresql('nova_cell0').with(
+        :password_hash => 'md557ae0608fad632bf0155cb9502a6b454',
+        :dbname        => 'nova_cell0',
+        :user          => 'nova',
+        :encoding      => nil,
+        :privileges    => 'ALL',
       )}
     end
 
+    context 'when disabling cell0 setup' do
+      let :params do
+        { :setup_cell0 => false}.merge(req_params)
+      end
+
+      it { is_expected.to_not contain_openstacklib__db__postgresql('nova_cell0') }
+    end
   end
 
   on_supported_os({