Make DNS drivers inherit interface.

Updates the DNS driver implementations so they inherit
the interface. Should help catch things that aren't
implemented in the future.

Change-Id: Ic8b269c8525236c65b492c889d4530a09836bb13

3 files changed, 9 insertions, 3 deletions

diff --git a/nova/network/ldapdns.py b/nova/network/ldapdns.py
index affa976f0..c5ae62899 100644
--- a/nova/network/ldapdns.py
+++ b/nova/network/ldapdns.py
@@ -16,6 +16,7 @@ import ldap
 import time
 
 from nova import exception
+from nova.network import dns_driver
 from nova.openstack.common import cfg
 from nova.openstack.common import log as logging
 from nova import utils
@@ -300,7 +301,7 @@ class HostEntry(DNSEntry):
     parent = property(_parent)
 
 
-class LdapDNS(object):
+class LdapDNS(dns_driver.DNSDriver):
     """Driver for PowerDNS using ldap as a back end.
 
        This driver assumes ldap-method=strict, with all domains
diff --git a/nova/network/minidns.py b/nova/network/minidns.py
index a008c5c36..435cca3b7 100644
--- a/nova/network/minidns.py
+++ b/nova/network/minidns.py
@@ -17,14 +17,16 @@ import shutil
 import tempfile
 
 from nova import exception
+from nova.network import dns_driver
 from nova.openstack.common import cfg
 from nova.openstack.common import log as logging
 
+
 CONF = cfg.CONF
 LOG = logging.getLogger(__name__)
 
 
-class MiniDNS(object):
+class MiniDNS(dns_driver.DNSDriver):
     """ Trivial DNS driver. This will read/write to a local, flat file
         and have no effect on your actual DNS system. This class is
         strictly for testing purposes, and should keep you out of dependency
diff --git a/nova/network/noop_dns_driver.py b/nova/network/noop_dns_driver.py
index 82ca0fb2f..23d1d1f3e 100644
--- a/nova/network/noop_dns_driver.py
+++ b/nova/network/noop_dns_driver.py
@@ -15,7 +15,10 @@
 # under the License.
 
 
-class NoopDNSDriver(object):
+from nova.network import dns_driver
+
+
+class NoopDNSDriver(dns_driver.DNSDriver):
     """ No-op DNS manager. Does nothing. """
 
     def __init__(self):