Move common virt driver options to virt.driver

The default_ephemeral_format and use_cow_images options are used by a
number of virt drivers and nowhere else.

blueprint: scope-config-opts
Change-Id: I4ab2891e156589ae7bb44e6ce69cba3680a070c5

nova/config.py

@@ -66,19 +66,12 @@ global_opts = [
     cfg.ListOpt('memcached_servers',
                 default=None,
                 help='Memcached servers or None for in process cache.'),
-    cfg.StrOpt('default_ephemeral_format',
-               default=None,
-               help='The default format an ephemeral_volume will be '
-                    'formatted with on creation.'),
     cfg.BoolOpt('use_ipv6',
                 default=False,
                 help='use ipv6'),
     cfg.IntOpt('service_down_time',
                default=60,
                help='maximum time since last check-in for up service'),
-    cfg.BoolOpt('use_cow_images',
-                default=True,
-                help='Whether to use cow images'),
 ]
 
 cfg.CONF.register_opts(global_opts)

nova/virt/driver.py

@@ -35,6 +35,13 @@ driver_opts = [
                    'include: libvirt.LibvirtDriver, xenapi.XenAPIDriver, '
                    'fake.FakeDriver, baremetal.BareMetalDriver, '
                    'vmwareapi.VMWareESXDriver'),
+    cfg.StrOpt('default_ephemeral_format',
+               default=None,
+               help='The default format an ephemeral_volume will be '
+                    'formatted with on creation.'),
+    cfg.BoolOpt('use_cow_images',
+                default=True,
+                help='Whether to use cow images'),
 ]
 
 CONF = cfg.CONF

nova/virt/hyperv/livemigrationops.py

@@ -35,7 +35,7 @@ if sys.platform == 'win32':
 
 LOG = logging.getLogger(__name__)
 CONF = cfg.CONF
-CONF.import_opt('use_cow_images', 'nova.config')
+CONF.import_opt('use_cow_images', 'nova.virt.driver')
 
 
 class LiveMigrationOps(baseops.BaseOps):

nova/virt/hyperv/vmops.py

@@ -58,7 +58,7 @@ hyperv_opts = [
 
 CONF = cfg.CONF
 CONF.register_opts(hyperv_opts)
-CONF.import_opt('use_cow_images', 'nova.config')
+CONF.import_opt('use_cow_images', 'nova.virt.driver')
 
 
 class VMOps(baseops.BaseOps):

nova/virt/libvirt/driver.py

@@ -190,10 +190,10 @@ libvirt_opts = [
 
 CONF = cfg.CONF
 CONF.register_opts(libvirt_opts)
-CONF.import_opt('default_ephemeral_format', 'nova.config')
 CONF.import_opt('host', 'nova.config')
 CONF.import_opt('my_ip', 'nova.config')
-CONF.import_opt('use_cow_images', 'nova.config')
+CONF.import_opt('default_ephemeral_format', 'nova.virt.driver')
+CONF.import_opt('use_cow_images', 'nova.virt.driver')
 CONF.import_opt('live_migration_retry_count', 'nova.compute.manager')
 CONF.import_opt('vncserver_proxyclient_address', 'nova.vnc')
 

nova/virt/xenapi/vm_utils.py

@@ -123,9 +123,9 @@ xenapi_vm_utils_opts = [
 
 CONF = cfg.CONF
 CONF.register_opts(xenapi_vm_utils_opts)
-CONF.import_opt('default_ephemeral_format', 'nova.config')
+CONF.import_opt('default_ephemeral_format', 'nova.virt.driver')
+CONF.import_opt('use_cow_images', 'nova.virt.driver')
 CONF.import_opt('glance_num_retries', 'nova.image.glance')
-CONF.import_opt('use_cow_images', 'nova.config')
 CONF.import_opt('use_ipv6', 'nova.config')
 
 XENAPI_POWER_STATE = {