IBP Got rid of md for /boot

Centos does use legacy grub, and it is
only able to boot from md with metadata 0.9.
So, we are limited to have not more than 28 disks
on a node because current version of volume
manager assumes /boot is spread over all disks and
0.9 metadata does not support more than 28.
To avoid this limitation we've got rid of using
md for /boot completely.

Change-Id: I08398453625a4e9136d67989c7ebea41cb9cb766
Closes-Bug: #1340414

fuel_agent/drivers/nailgun.py

@@ -65,6 +65,11 @@ class Nailgun(object):
         # how it is given by nailgun
         self.data = data
 
+        # this var is used as a flag that /boot fs
+        # has already been added. we need this to
+        # get rid of md over all disks for /boot partition.
+        self._boot_done = False
+
     def partition_data(self):
         return self.data['ks_meta']['pm_data']['ks_spaces']
 
@@ -250,7 +255,8 @@ class Nailgun(object):
                         metadatacopies=metadatacopies)
 
                 if volume['type'] == 'raid':
-                    if 'mount' in volume and volume['mount'] != 'none':
+                    if 'mount' in volume and \
+                            volume['mount'] not in ('none', '/boot'):
                         LOG.debug('Attaching partition to RAID '
                                   'by its mount point %s' % volume['mount'])
                         partition_scheme.md_attach_by_mount(
@@ -258,6 +264,18 @@ class Nailgun(object):
                             fs_type=volume.get('file_system', 'xfs'),
                             fs_label=self._getlabel(volume.get('disk_label')))
 
+                    if 'mount' in volume and volume['mount'] == '/boot' and \
+                            not self._boot_done:
+                        LOG.debug('Adding file system on partition: '
+                                  'mount=%s type=%s' %
+                                  (volume['mount'],
+                                   volume.get('file_system', 'ext2')))
+                        partition_scheme.add_fs(
+                            device=prt.name, mount=volume['mount'],
+                            fs_type=volume.get('file_system', 'ext2'),
+                            fs_label=self._getlabel(volume.get('disk_label')))
+                        self._boot_done = True
+
             # this partition will be used to put there configdrive image
             if partition_scheme.configdrive_device() is None:
                 LOG.debug('Adding configdrive partition on disk %s: size=20' %

fuel_agent/tests/test_manager.py

@@ -114,11 +114,6 @@ class TestManager(test_base.BaseTestCase):
         self.assertEqual(mock_pu_sgt_expected_calls,
                          mock_pu_sgt.call_args_list)
 
-        mock_mu_m_expected_calls = [mock.call('/dev/md0', 'mirror',
-                                              '/dev/sda3', '/dev/sdb3',
-                                              '/dev/sdc3')]
-        self.assertEqual(mock_mu_m_expected_calls, mock_mu_m.call_args_list)
-
         mock_lu_p_expected_calls = [
             mock.call('/dev/sda5', metadatasize=28, metadatacopies=2),
             mock.call('/dev/sda6', metadatasize=28, metadatacopies=2),
@@ -137,7 +132,7 @@ class TestManager(test_base.BaseTestCase):
         self.assertEqual(mock_lu_l_expected_calls, mock_lu_l.call_args_list)
 
         mock_fu_mf_expected_calls = [
-            mock.call('ext2', '', '', '/dev/md0'),
+            mock.call('ext2', '', '', '/dev/sda3'),
             mock.call('ext2', '', '', '/dev/sda4'),
             mock.call('swap', '', '', '/dev/mapper/os-swap'),
             mock.call('xfs', '', '', '/dev/mapper/image-glance')]

fuel_agent/tests/test_nailgun.py

@@ -576,7 +576,6 @@ class TestNailgun(test_base.BaseTestCase):
         self.assertEqual(4, len(p_scheme.pvs))
         self.assertEqual(3, len(p_scheme.lvs))
         self.assertEqual(2, len(p_scheme.vgs))
-        self.assertEqual(1, len(p_scheme.mds))
         self.assertEqual(3, len(p_scheme.parteds))
 
     @mock.patch('yaml.load')
@@ -682,7 +681,6 @@ class TestNailgun(test_base.BaseTestCase):
         self.assertEqual(4, len(p_scheme.pvs))
         self.assertEqual(3, len(p_scheme.lvs))
         self.assertEqual(2, len(p_scheme.vgs))
-        self.assertEqual(1, len(p_scheme.mds))
         self.assertEqual(3, len(p_scheme.parteds))
         self.assertEqual(3, self.drv._get_partition_count('ceph'))
         #NOTE(agordeev): (-2, -1, -1) is the list of ceph data partition counts