Config options: centralize glusterfs libvirt options (9)

The config options of the "nova.conf" section "libvirt" got
moved to the new central location "nova/conf/libvirt.py".
Subsequent patches will then move another options in libvirt section.
This is the 9th patch in a long-chain patchs.

Change-Id: I0f6c9c2ecbf053a64c4af6ec2877d637b6506cb0
Co-Authored-by: Markus Zoeller <mzoeller@de.ibm.com>
Implements: blueprint centralize-config-options-newton

nova/conf/libvirt.py

@@ -15,6 +15,8 @@
 
 import itertools
 
+from nova.conf import paths
+
 from oslo_config import cfg
 
 # Downtime period in milliseconds
@@ -303,6 +305,13 @@ libvirt_volume_aoe_opts = [
                help='Number of times to rediscover AoE target to find volume'),
 ]
 
+libvirt_volume_glusterfs_opts = [
+    cfg.StrOpt('glusterfs_mount_point_base',
+               default=paths.state_path_def('mnt'),
+               help='Directory where the glusterfs volume is mounted on the '
+                    'compute node'),
+]
+
 ALL_OPTS = list(itertools.chain(
     libvirt_general_opts,
     libvirt_imagebackend_opts,
@@ -312,6 +321,7 @@ ALL_OPTS = list(itertools.chain(
     libvirt_vif_opts,
     libvirt_volume_opts,
     libvirt_volume_aoe_opts,
+    libvirt_volume_glusterfs_opts,
 ))
 
 

nova/virt/libvirt/volume/glusterfs.py

@@ -12,12 +12,10 @@
 
 
 from oslo_concurrency import processutils
-from oslo_config import cfg
 from oslo_log import log as logging
 import six
 
 import nova.conf
-from nova.conf import paths
 from nova.i18n import _LE, _LW
 from nova import utils
 from nova.virt.libvirt import utils as libvirt_utils
@@ -25,15 +23,6 @@ from nova.virt.libvirt.volume import fs
 
 CONF = nova.conf.CONF
 
-volume_opts = [
-    cfg.StrOpt('glusterfs_mount_point_base',
-               default=paths.state_path_def('mnt'),
-               help='Directory where the glusterfs volume is mounted on the '
-                    'compute node'),
-    ]
-
-CONF.register_opts(volume_opts, 'libvirt')
-
 LOG = logging.getLogger(__name__)
 
 

nova/virt/opts.py

@@ -12,7 +12,6 @@
 
 import itertools
 
-import nova.virt.libvirt.volume.glusterfs
 import nova.virt.libvirt.volume.iscsi
 import nova.virt.libvirt.volume.iser
 import nova.virt.libvirt.volume.net
@@ -32,7 +31,6 @@ def list_opts():
     return [
         ('libvirt',
          itertools.chain(
-             nova.virt.libvirt.volume.glusterfs.volume_opts,
              nova.virt.libvirt.volume.iscsi.volume_opts,
              nova.virt.libvirt.volume.iser.volume_opts,
              nova.virt.libvirt.volume.net.volume_opts,