Sanitize nova_manage output in provider

nova-manage can output a warning message in some cases (see [1] for
an example with the latest oslo.db), and that confuses the nova_manage
provider.

Since the command in a provider cannot separate stdout and stderr[2],
we use a workaround with Puppet::Util::Execution.execute, and
use that instead of the provider command in the nova_cells and
nova_cell_v2 providers.

[1] - https://logs.rdoproject.org/23/9323/2/experimental/gate-weirdo-dlrn-master-puppet-scenario001/Z6a290513d2904561a2adc60ddbfd7084/weirdo-project/puppet.txt.gz
[2] - https://github.com/puppetlabs/puppet/blob/master/lib/puppet/util/execution.rb#L14-L16

Change-Id: I79f76592672d968b96338b3e0f6a86c9b7faeb93
(cherry picked from commit 682174b778)

lib/puppet/provider/nova.rb

@@ -38,6 +38,20 @@ class Puppet::Provider::Nova < Puppet::Provider::Openstack
     Puppet::Provider::Openstack.request(service, action, properties, @credentials)
   end
 
+  def self.nova_manage_request(*args)
+    # Not using the nova-manage command directly,
+    # so we can disable combining of stderr/stdout output.
+    Puppet::Util::Execution.execute("#{Puppet::Util.which('nova-manage')} #{args.join(' ')}", {
+      :failonfail         => true,
+      :combine            => false,
+      :custom_environment => {}
+    })
+  end
+
+  def nova_manage_request(*args)
+    self.class.nova_manage_request(args)
+  end
+
   def self.conf_filename
     '/etc/nova/nova.conf'
   end

lib/puppet/provider/nova_cell_v2/nova_manage.rb

@@ -8,8 +8,6 @@ Puppet::Type.type(:nova_cell_v2).provide(
 
   desc "Manage nova cellv2 cells"
 
-  optional_commands :nova_manage => 'nova-manage'
-
   mk_resource_methods
 
   def initialize(value={})
@@ -18,7 +16,7 @@ Puppet::Type.type(:nova_cell_v2).provide(
   end
 
   def self.instances
-    cells_list = nova_manage("cell_v2", "list_cells", "--verbose")
+    cells_list = nova_manage_request("cell_v2", "list_cells", "--verbose") 
 
     cells_list.split("\n")[3..-2].collect do |cell|
       $name, $uuid, $transport_url, $database_connection = cell.split('|')[1..-1].map{ |x| x.strip}
@@ -93,7 +91,7 @@ Puppet::Type.type(:nova_cell_v2).provide(
         optional_opts.push(opt).push(resource[param])
       end
     end
-    cell_uuid = nova_manage('cell_v2', 'create_cell',
+    cell_uuid = nova_manage_request('cell_v2', 'create_cell',
       optional_opts, "--verbose"
     )
     @property_hash = {
@@ -119,7 +117,7 @@ Puppet::Type.type(:nova_cell_v2).provide(
   def flush
     @property_hash.update(@property_flush)
     if @property_flush[:ensure] == :absent
-      nova_manage("cell_v2", "delete_cell", "--cell_uuid", @property_hash[:uuid])
+      nova_manage_request("cell_v2", "delete_cell", "--cell_uuid", @property_hash[:uuid])
     elsif @property_flush[:transport_url] or @property_flush[:database_connection]
       opts = []
       if not @property_flush[:transport_url]
@@ -140,8 +138,8 @@ Puppet::Type.type(:nova_cell_v2).provide(
       end
       opts.push('--database_connection').push(@property_flush[:database_connection])
 
-      nova_manage("cell_v2", "update_cell", "--cell_uuid", @property_hash[:uuid], opts)
+      nova_manage_request("cell_v2", "update_cell", "--cell_uuid", @property_hash[:uuid], opts)
     end
     @property_flush = {}
   end
-end
+end

lib/puppet/provider/nova_cells/nova_manage.rb

@@ -20,15 +20,18 @@
 # nova_cells provider
 #
 
-Puppet::Type.type(:nova_cells).provide(:nova_manage) do
+require File.join(File.dirname(__FILE__), '..','..','..', 'puppet/provider/nova')
+
+Puppet::Type.type(:nova_cells).provide(
+  :nova_manage,
+  :parent => Puppet::Provider::Nova
+) do
 
   desc "Manage nova cells"
 
-  optional_commands :nova_manage => 'nova-manage'
-
   def self.instances
     begin
-      cells_list = nova_manage("cell", "list")
+      cells_list = nova_manage_request("cell", "list")
     rescue Exception => e
       if e.message =~ /No cells defined/
         return []
@@ -63,14 +66,14 @@ Puppet::Type.type(:nova_cells).provide(:nova_manage) do
       end
     end
 
-    nova_manage('cell', 'create',
+    nova_manage_request('cell', 'create',
       optional_opts
     )
   end
 
   def exists?
     begin
-      cells_list = nova_manage("cell", "list")
+      cells_list = nova_manage_request("cell", "list")
       return cells_list.split("\n")[1..-1].detect do |n|
         n =~ /^(\S+)\s+(#{resource[:cells].split('/').first})/
       end
@@ -81,7 +84,7 @@ Puppet::Type.type(:nova_cells).provide(:nova_manage) do
 
 
   def destroy
-    nova_manage("cell", "delete", resource[:name])
+    nova_manage_request("cell", "delete", resource[:name])
   end
 
 end