Merge lp:~rvb/maas/refactor-ip-addresses into lp:~maas-committers/maas/trunk

[Raphaël Badin]

Implement the last bit of the new networking model:
- Add a link: Interface → IP address
- Add a link: IP address → Subnet
- Allow null IP address in the IP address table: this is for yet unknown DHCP-assigned addresses.

[Gavin Panella (allenap)]

I have a few questions, but +1 anyway.

review: Approve

[Raphaël Badin (rvb)]

Thanks for the review. Answers inline…

=== modified file 'src/maasserver/enum.py'
--- src/maasserver/enum.py	2015-06-11 14:57:49 +0000
+++ src/maasserver/enum.py	2015-06-29 11:36:56 +0000
@@ -234,6 +234,9 @@
     # leases file.
     USER_RESERVED = 4
 
+    # Assigned by a MAAS-managed DHCP server.
+    DHCP = 5
+
 
 class POWER_STATE:
 

=== added file 'src/maasserver/migrations/0147_add_ip_connections.py'
--- src/maasserver/migrations/0147_add_ip_connections.py	1970-01-01 00:00:00 +0000
+++ src/maasserver/migrations/0147_add_ip_connections.py	2015-06-29 11:36:56 +0000
@@ -0,0 +1,525 @@
+from django.db import models
+from south.db import db
+# -*- coding: utf-8 -*-
+from south.utils import datetime_utils as datetime
+from south.v2 import SchemaMigration
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        # Adding field 'StaticIPAddress.subnet'
+        db.add_column(u'maasserver_staticipaddress', 'subnet',
+                      self.gf('django.db.models.fields.related.ForeignKey')(to=orm['maasserver.Subnet'], null=True, blank=True),
+                      keep_default=False)
+
+
+        # Changing field 'StaticIPAddress.ip'
+        db.alter_column(u'maasserver_staticipaddress', 'ip', self.gf('maasserver.fields.MAASIPAddressField')(max_length=39, unique=True, null=True))
+        # Adding M2M table for field ip_addresses on 'Interface'
+        db.create_table(u'maasserver_interface_ip_addresses', (
+            ('id', models.AutoField(verbose_name='ID', primary_key=True, auto_created=True)),
+            ('interface', models.ForeignKey(orm[u'maasserver.interface'], null=False)),
+            ('staticipaddress', models.ForeignKey(orm[u'maasserver.staticipaddress'], null=False))
+        ))
+        db.create_unique(u'maasserver_interface_ip_addresses', ['interface_id', 'staticipaddress_id'])
+
+
+    def backwards(self, orm):
+        # Deleting field 'StaticIPAddress.subnet'
+        db.delete_column(u'maasserver_staticipaddress', 'subnet_id')
+
+
+        # User chose to not deal with backwards NULL issues for 'StaticIPAddress.ip'
+        raise RuntimeError("Cannot reverse this migration. 'StaticIPAddress.ip' and its values cannot be restored.")
+        # Removing M2M table for field ip_addresses on 'Interface'
+        db.delete_table('maasserver_interface_ip_addresses')
+
+
+    models = {
+        u'auth.group': {
+            'Meta': {'object_name': 'Group'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '80'}),
+            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
+        },
+        u'auth.permission': {
+            'Meta': {'ordering': "(u'content_type__app_label', u'content_type__model', u'codename')", 'unique_together': "((u'content_type', u'codename'),)", 'object_name': 'Permission'},
+            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['contenttypes.ContentType']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
+        },
+        u'auth.user': {
+            'Meta': {'object_name': 'User'},
+            'date_joined': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
+            'email': ('django.db.models.fields.EmailField', [], {'unique': 'True', 'max_length': '75', 'blank': 'True'}),
+            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
+            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'symmetrical': 'False', 'related_name': "u'user_set'", 'blank': 'True', 'to': u"orm['auth.Group']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
+            'is_staff': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'is_superuser': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'last_login': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
+            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
+            'password': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
+            'user_permissions': ('django.db.models.fields.related.ManyToManyField', [], {'symmetrical': 'False', 'related_name': "u'user_set'", 'blank': 'True', 'to': u"orm['auth.Permission']"}),
+            'username': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '30'})
+        },
+        u'contenttypes.contenttype': {
+            'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
+            'app_label': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'model': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
+        },
+        u'maasserver.blockdevice': {
+            'Meta': {'ordering': "[u'id']", 'unique_together': "((u'node', u'path'),)", 'object_name': 'BlockDevice'},
+            'block_size': ('django.db.models.fields.IntegerField', [], {}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'id_path': ('django.db.models.fields.FilePathField', [], {'max_length': '100', 'null': 'True', 'blank': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'node': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Node']"}),
+            'path': ('django.db.models.fields.FilePathField', [], {'max_length': '100'}),
+            'size': ('django.db.models.fields.BigIntegerField', [], {}),
+            'tags': ('djorm_pgarray.fields.ArrayField', [], {'default': '[]', 'dbtype': "u'text'", 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.bootresource': {
+            'Meta': {'unique_together': "((u'name', u'architecture'),)", 'object_name': 'BootResource'},
+            'architecture': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'extra': ('maasserver.fields.JSONObjectField', [], {'default': "u''", 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'rtype': ('django.db.models.fields.IntegerField', [], {'max_length': '10'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.bootresourcefile': {
+            'Meta': {'unique_together': "((u'resource_set', u'filetype'),)", 'object_name': 'BootResourceFile'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'extra': ('maasserver.fields.JSONObjectField', [], {'default': "u''", 'blank': 'True'}),
+            'filename': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'filetype': ('django.db.models.fields.CharField', [], {'default': "u'root-tgz'", 'max_length': '20'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'largefile': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.LargeFile']"}),
+            'resource_set': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'files'", 'to': u"orm['maasserver.BootResourceSet']"}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.bootresourceset': {
+            'Meta': {'unique_together': "((u'resource', u'version'),)", 'object_name': 'BootResourceSet'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'label': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'resource': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'sets'", 'to': u"orm['maasserver.BootResource']"}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'version': ('django.db.models.fields.CharField', [], {'max_length': '255'})
+        },
+        u'maasserver.bootsource': {
+            'Meta': {'object_name': 'BootSource'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'keyring_data': ('maasserver.fields.EditableBinaryField', [], {'blank': 'True'}),
+            'keyring_filename': ('django.db.models.fields.FilePathField', [], {'max_length': '100', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'url': ('django.db.models.fields.URLField', [], {'unique': 'True', 'max_length': '200'})
+        },
+        u'maasserver.bootsourcecache': {
+            'Meta': {'object_name': 'BootSourceCache'},
+            'arch': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            'boot_source': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.BootSource']"}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'label': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            'os': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            'release': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            'subarch': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.bootsourceselection': {
+            'Meta': {'unique_together': "((u'boot_source', u'os', u'release'),)", 'object_name': 'BootSourceSelection'},
+            'arches': ('djorm_pgarray.fields.ArrayField', [], {'default': 'None', 'dbtype': "u'text'", 'null': 'True', 'blank': 'True'}),
+            'boot_source': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.BootSource']"}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'labels': ('djorm_pgarray.fields.ArrayField', [], {'default': 'None', 'dbtype': "u'text'", 'null': 'True', 'blank': 'True'}),
+            'os': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '20', 'blank': 'True'}),
+            'release': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '20', 'blank': 'True'}),
+            'subarches': ('djorm_pgarray.fields.ArrayField', [], {'default': 'None', 'dbtype': "u'text'", 'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.candidatename': {
+            'Meta': {'unique_together': "((u'name', u'position'),)", 'object_name': 'CandidateName'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.SlugField', [], {'max_length': '50'}),
+            'position': ('django.db.models.fields.IntegerField', [], {})
+        },
+        u'maasserver.componenterror': {
+            'Meta': {'object_name': 'ComponentError'},
+            'component': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '40'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'error': ('django.db.models.fields.CharField', [], {'max_length': '1000'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.config': {
+            'Meta': {'object_name': 'Config'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'}),
+            'value': ('maasserver.fields.JSONObjectField', [], {'null': 'True'})
+        },
+        u'maasserver.dhcplease': {
+            'Meta': {'object_name': 'DHCPLease'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip': ('maasserver.fields.MAASIPAddressField', [], {'unique': 'True', 'max_length': '39'}),
+            'mac': ('maasserver.fields.MACAddressField', [], {}),
+            'nodegroup': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.NodeGroup']"})
+        },
+        u'maasserver.downloadprogress': {
+            'Meta': {'object_name': 'DownloadProgress'},
+            'bytes_downloaded': ('django.db.models.fields.IntegerField', [], {'null': 'True', 'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'error': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'blank': 'True'}),
+            'filename': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'nodegroup': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.NodeGroup']"}),
+            'size': ('django.db.models.fields.IntegerField', [], {'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.event': {
+            'Meta': {'object_name': 'Event'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'description': ('django.db.models.fields.TextField', [], {'default': "u''", 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'node': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Node']"}),
+            'type': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.EventType']"}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.eventtype': {
+            'Meta': {'object_name': 'EventType'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'description': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'level': ('django.db.models.fields.IntegerField', [], {'db_index': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.fabric': {
+            'Meta': {'object_name': 'Fabric'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '256'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.filestorage': {
+            'Meta': {'unique_together': "((u'filename', u'owner'),)", 'object_name': 'FileStorage'},
+            'content': ('metadataserver.fields.BinaryField', [], {'blank': 'True'}),
+            'filename': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'key': ('django.db.models.fields.CharField', [], {'default': "u'a6d7ef74-1e3b-11e5-a2ed-3c970e0e56dc'", 'unique': 'True', 'max_length': '36'}),
+            'owner': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': u"orm['auth.User']", 'null': 'True', 'blank': 'True'})
+        },
+        u'maasserver.filesystem': {
+            'Meta': {'object_name': 'Filesystem'},
+            'block_device': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.BlockDevice']", 'unique': 'True', 'null': 'True', 'blank': 'True'}),
+            'create_params': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'filesystem_group': ('django.db.models.fields.related.ForeignKey', [], {'blank': 'True', 'related_name': "u'filesystems'", 'null': 'True', 'to': u"orm['maasserver.FilesystemGroup']"}),
+            'fstype': ('django.db.models.fields.CharField', [], {'default': "u'ext4'", 'max_length': '20'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'mount_params': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            'mount_point': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            'partition': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Partition']", 'unique': 'True', 'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'uuid': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '36'})
+        },
+        u'maasserver.filesystemgroup': {
+            'Meta': {'object_name': 'FilesystemGroup'},
+            'create_params': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'group_type': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'uuid': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '36'})
+        },
+        u'maasserver.interface': {
+            'Meta': {'ordering': "(u'created',)", 'object_name': 'Interface'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip_addresses': ('django.db.models.fields.related.ManyToManyField', [], {'symmetrical': 'False', 'to': u"orm['maasserver.StaticIPAddress']", 'null': 'True', 'blank': 'True'}),
+            'ipv4_params': ('maasserver.fields.JSONObjectField', [], {'default': "u''", 'blank': 'True'}),
+            'ipv6_params': ('maasserver.fields.JSONObjectField', [], {'default': "u''", 'blank': 'True'}),
+            'mac': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.MACAddress']", 'null': 'True', 'blank': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'params': ('maasserver.fields.JSONObjectField', [], {'default': "u''", 'blank': 'True'}),
+            'parents': ('django.db.models.fields.related.ManyToManyField', [], {'symmetrical': 'False', 'to': u"orm['maasserver.Interface']", 'null': 'True', 'through': u"orm['maasserver.InterfaceRelationship']", 'blank': 'True'}),
+            'tags': ('djorm_pgarray.fields.ArrayField', [], {'default': '[]', 'dbtype': "u'text'", 'blank': 'True'}),
+            'type': ('django.db.models.fields.CharField', [], {'max_length': '20'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'vlan': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.VLAN']", 'on_delete': 'models.PROTECT'})
+        },
+        u'maasserver.interfacerelationship': {
+            'Meta': {'object_name': 'InterfaceRelationship'},
+            'child': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'parent_relationships'", 'to': u"orm['maasserver.Interface']"}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'parent': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'children_relationships'", 'to': u"orm['maasserver.Interface']"}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.largefile': {
+            'Meta': {'object_name': 'LargeFile'},
+            'content': ('maasserver.fields.LargeObjectField', [], {}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'sha256': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '64'}),
+            'total_size': ('django.db.models.fields.BigIntegerField', [], {}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.licensekey': {
+            'Meta': {'unique_together': "((u'osystem', u'distro_series'),)", 'object_name': 'LicenseKey'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'distro_series': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'license_key': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'osystem': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.macaddress': {
+            'Meta': {'ordering': "(u'created',)", 'object_name': 'MACAddress'},
+            'cluster_interface': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': u"orm['maasserver.NodeGroupInterface']", 'null': 'True', 'on_delete': 'models.SET_NULL', 'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip_addresses': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['maasserver.StaticIPAddress']", 'symmetrical': 'False', 'through': u"orm['maasserver.MACStaticIPAddressLink']", 'blank': 'True'}),
+            'mac_address': ('maasserver.fields.MACAddressField', [], {'unique': 'True'}),
+            'networks': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['maasserver.Network']", 'symmetrical': 'False', 'blank': 'True'}),
+            'node': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Node']", 'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.macstaticipaddresslink': {
+            'Meta': {'unique_together': "((u'ip_address', u'mac_address'),)", 'object_name': 'MACStaticIPAddressLink'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip_address': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.StaticIPAddress']", 'unique': 'True'}),
+            'mac_address': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.MACAddress']"}),
+            'nic_alias': ('django.db.models.fields.IntegerField', [], {'default': 'None', 'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.network': {
+            'Meta': {'object_name': 'Network'},
+            'default_gateway': ('maasserver.fields.MAASIPAddressField', [], {'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'description': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
+            'dns_servers': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip': ('maasserver.fields.MAASIPAddressField', [], {'unique': 'True', 'max_length': '39'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'}),
+            'netmask': ('maasserver.fields.MAASIPAddressField', [], {'max_length': '39'}),
+            'vlan_tag': ('django.db.models.fields.PositiveSmallIntegerField', [], {'unique': 'True', 'null': 'True', 'blank': 'True'})
+        },
+        u'maasserver.node': {
+            'Meta': {'object_name': 'Node'},
+            'agent_name': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            'architecture': ('django.db.models.fields.CharField', [], {'max_length': '31', 'null': 'True', 'blank': 'True'}),
+            'boot_type': ('django.db.models.fields.CharField', [], {'default': "u'fastpath'", 'max_length': '20'}),
+            'cpu_count': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'disable_ipv4': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'distro_series': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '20', 'blank': 'True'}),
+            'error': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'blank': 'True'}),
+            'error_description': ('django.db.models.fields.TextField', [], {'default': "u''", 'blank': 'True'}),
+            'hostname': ('django.db.models.fields.CharField', [], {'default': "u''", 'unique': 'True', 'max_length': '255', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'installable': ('django.db.models.fields.BooleanField', [], {'default': 'True', 'db_index': 'True'}),
+            'license_key': ('django.db.models.fields.CharField', [], {'max_length': '30', 'null': 'True', 'blank': 'True'}),
+            'memory': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'netboot': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
+            'nodegroup': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.NodeGroup']", 'null': 'True'}),
+            'osystem': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '20', 'blank': 'True'}),
+            'owner': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': u"orm['auth.User']", 'null': 'True', 'blank': 'True'}),
+            'parent': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'related_name': "u'children'", 'null': 'True', 'blank': 'True', 'to': u"orm['maasserver.Node']"}),
+            'power_parameters': ('maasserver.fields.JSONObjectField', [], {'default': "u''", 'blank': 'True'}),
+            'power_state': ('django.db.models.fields.CharField', [], {'default': "u'unknown'", 'max_length': '10'}),
+            'power_type': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '10', 'blank': 'True'}),
+            'pxe_mac': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'+'", 'on_delete': 'models.SET_NULL', 'default': 'None', 'to': u"orm['maasserver.MACAddress']", 'blank': 'True', 'null': 'True'}),
+            'routers': ('djorm_pgarray.fields.ArrayField', [], {'default': 'None', 'dbtype': "u'macaddr'", 'null': 'True', 'blank': 'True'}),
+            'status': ('django.db.models.fields.IntegerField', [], {'default': '0', 'max_length': '10'}),
+            'swap_size': ('django.db.models.fields.BigIntegerField', [], {'default': 'None', 'null': 'True', 'blank': 'True'}),
+            'system_id': ('django.db.models.fields.CharField', [], {'default': "u'node-a6d512cc-1e3b-11e5-a2ed-3c970e0e56dc'", 'unique': 'True', 'max_length': '41'}),
+            'tags': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['maasserver.Tag']", 'symmetrical': 'False'}),
+            'token': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['piston.Token']", 'null': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'zone': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Zone']", 'on_delete': 'models.SET_DEFAULT'})
+        },
+        u'maasserver.nodegroup': {
+            'Meta': {'object_name': 'NodeGroup'},
+            'api_key': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '18'}),
+            'api_token': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['piston.Token']", 'unique': 'True'}),
+            'cluster_name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '100', 'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'default_disable_ipv4': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'dhcp_key': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'maas_url': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'blank': 'True'}),
+            'name': ('maasserver.models.nodegroup.DomainNameField', [], {'max_length': '80', 'blank': 'True'}),
+            'status': ('django.db.models.fields.IntegerField', [], {'default': '1'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'uuid': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '36'})
+        },
+        u'maasserver.nodegroupinterface': {
+            'Meta': {'unique_together': "((u'nodegroup', u'name'),)", 'object_name': 'NodeGroupInterface'},
+            'broadcast_ip': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'foreign_dhcp_ip': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'interface': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'blank': 'True'}),
+            'ip': ('maasserver.fields.MAASIPAddressField', [], {'max_length': '39'}),
+            'ip_range_high': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'ip_range_low': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'management': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'name': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'blank': 'True'}),
+            'nodegroup': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.NodeGroup']"}),
+            'router_ip': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'static_ip_range_high': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'static_ip_range_low': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'subnet': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Subnet']", 'null': 'True', 'on_delete': 'models.PROTECT', 'blank': 'True'}),
+            'subnet_mask': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'vlan': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.VLAN']", 'on_delete': 'models.PROTECT'})
+        },
+        u'maasserver.partition': {
+            'Meta': {'object_name': 'Partition'},
+            'bootable': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'partition_table': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'partitions'", 'to': u"orm['maasserver.PartitionTable']"}),
+            'size': ('django.db.models.fields.BigIntegerField', [], {}),
+            'start_offset': ('django.db.models.fields.BigIntegerField', [], {}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'uuid': ('django.db.models.fields.CharField', [], {'max_length': '36', 'unique': 'True', 'null': 'True', 'blank': 'True'})
+        },
+        u'maasserver.partitiontable': {
+            'Meta': {'object_name': 'PartitionTable'},
+            'block_device': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.BlockDevice']"}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'table_type': ('django.db.models.fields.CharField', [], {'default': "u'GPT'", 'max_length': '20'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.physicalblockdevice': {
+            'Meta': {'ordering': "[u'id']", 'object_name': 'PhysicalBlockDevice', '_ormbases': [u'maasserver.BlockDevice']},
+            u'blockdevice_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': u"orm['maasserver.BlockDevice']", 'unique': 'True', 'primary_key': 'True'}),
+            'model': ('django.db.models.fields.CharField', [], {'max_length': '255', 'blank': 'True'}),
+            'serial': ('django.db.models.fields.CharField', [], {'max_length': '255', 'blank': 'True'})
+        },
+        u'maasserver.space': {
+            'Meta': {'object_name': 'Space'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '256'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.sshkey': {
+            'Meta': {'unique_together': "((u'user', u'key'),)", 'object_name': 'SSHKey'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'key': ('django.db.models.fields.TextField', [], {}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['auth.User']"})
+        },
+        u'maasserver.sslkey': {
+            'Meta': {'unique_together': "((u'user', u'key'),)", 'object_name': 'SSLKey'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'key': ('django.db.models.fields.TextField', [], {}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['auth.User']"})
+        },
+        u'maasserver.staticipaddress': {
+            'Meta': {'object_name': 'StaticIPAddress'},
+            'alloc_type': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'hostname': ('django.db.models.fields.CharField', [], {'default': "u''", 'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'ip': ('maasserver.fields.MAASIPAddressField', [], {'default': 'None', 'max_length': '39', 'unique': 'True', 'null': 'True', 'blank': 'True'}),
+            'subnet': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Subnet']", 'null': 'True', 'blank': 'True'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': u"orm['auth.User']", 'null': 'True', 'blank': 'True'})
+        },
+        u'maasserver.subnet': {
+            'Meta': {'unique_together': "((u'name', u'space'),)", 'object_name': 'Subnet'},
+            'cidr': ('maasserver.fields.CIDRField', [], {'unique': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'dns_servers': ('djorm_pgarray.fields.ArrayField', [], {'default': '[]', 'dbtype': "u'text'", 'null': 'True', 'blank': 'True'}),
+            'gateway_ip': ('maasserver.fields.MAASIPAddressField', [], {'max_length': '39', 'null': 'True', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'space': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Space']", 'on_delete': 'models.PROTECT'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'vlan': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.VLAN']", 'on_delete': 'models.PROTECT'})
+        },
+        u'maasserver.tag': {
+            'Meta': {'object_name': 'Tag'},
+            'comment': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'definition': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'kernel_opts': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '256'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'maasserver.userprofile': {
+            'Meta': {'object_name': 'UserProfile'},
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'user': ('django.db.models.fields.related.OneToOneField', [], {'to': u"orm['auth.User']", 'unique': 'True'})
+        },
+        u'maasserver.virtualblockdevice': {
+            'Meta': {'ordering': "[u'id']", 'object_name': 'VirtualBlockDevice', '_ormbases': [u'maasserver.BlockDevice']},
+            u'blockdevice_ptr': ('django.db.models.fields.related.OneToOneField', [], {'to': u"orm['maasserver.BlockDevice']", 'unique': 'True', 'primary_key': 'True'}),
+            'filesystem_group': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'virtual_devices'", 'to': u"orm['maasserver.FilesystemGroup']"}),
+            'uuid': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '36'})
+        },
+        u'maasserver.vlan': {
+            'Meta': {'unique_together': "((u'vid', u'fabric'), (u'name', u'fabric'))", 'object_name': 'VLAN'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'fabric': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['maasserver.Fabric']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '256'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {}),
+            'vid': ('django.db.models.fields.IntegerField', [], {})
+        },
+        u'maasserver.zone': {
+            'Meta': {'ordering': "[u'name']", 'object_name': 'Zone'},
+            'created': ('django.db.models.fields.DateTimeField', [], {}),
+            'description': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '256'}),
+            'updated': ('django.db.models.fields.DateTimeField', [], {})
+        },
+        u'piston.consumer': {
+            'Meta': {'object_name': 'Consumer'},
+            'description': ('django.db.models.fields.TextField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'key': ('django.db.models.fields.CharField', [], {'max_length': '18'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'secret': ('django.db.models.fields.CharField', [], {'max_length': '32'}),
+            'status': ('django.db.models.fields.CharField', [], {'default': "'pending'", 'max_length': '16'}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'blank': 'True', 'related_name': "'consumers'", 'null': 'True', 'to': u"orm['auth.User']"})
+        },
+        u'piston.token': {
+            'Meta': {'object_name': 'Token'},
+            'callback': ('django.db.models.fields.CharField', [], {'max_length': '255', 'null': 'True', 'blank': 'True'}),
+            'callback_confirmed': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'consumer': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['piston.Consumer']"}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'is_approved': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'key': ('django.db.models.fields.CharField', [], {'max_length': '18'}),
+            'secret': ('django.db.models.fields.CharField', [], {'max_length': '32'}),
+            'timestamp': ('django.db.models.fields.IntegerField', [], {'default': '1435567670L'}),
+            'token_type': ('django.db.models.fields.IntegerField', [], {}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'blank': 'True', 'related_name': "'tokens'", 'null': 'True', 'to': u"orm['auth.User']"}),
+            'verifier': ('django.db.models.fields.CharField', [], {'max_length': '10'})
+        }
+    }
+
+    complete_apps = ['maasserver']
\ No newline at end of file

=== modified file 'src/maasserver/models/interface.py'
--- src/maasserver/models/interface.py	2015-06-18 12:47:13 +0000
+++ src/maasserver/models/interface.py	2015-06-29 11:36:56 +0000
@@ -91,6 +91,9 @@
         'VLAN', default=get_default_vlan, editable=True, blank=False,
         null=False, on_delete=PROTECT)
 
+    ip_addresses = ManyToManyField(
+        'StaticIPAddress', editable=True, blank=True, null=True)
+
     mac = ForeignKey('MACAddress', editable=True, blank=True, null=True)
 
     ipv4_params = JSONObjectField(blank=True, default="")

=== modified file 'src/maasserver/models/staticipaddress.py'
--- src/maasserver/models/staticipaddress.py	2015-05-07 18:14:38 +0000
+++ src/maasserver/models/staticipaddress.py	2015-06-29 11:36:56 +0000
@@ -328,9 +328,12 @@
         verbose_name = "Static IP Address"
         verbose_name_plural = "Static IP Addresses"
 
+    # IP can be none when a DHCP lease has expired: in this case the entry
+    # in the StaticIPAddress only materializes the connection between an
+    # interface and a subnet.
     ip = MAASIPAddressField(
-        unique=True, null=False, editable=False, blank=False,
-        verbose_name='IP')
+        unique=True, null=True, editable=False, blank=True,
+        default=None, verbose_name='IP')
 
     # The MACStaticIPAddressLink table is used to link StaticIPAddress to
     # MACAddress.  See MACAddress.ip_addresses, and the reverse relation
@@ -340,6 +343,10 @@
     alloc_type = IntegerField(
         editable=False, null=False, blank=False, default=IPADDRESS_TYPE.AUTO)
 
+    # Subnet is only null for IP addresses allocate before the new networking
+    # model.
+    subnet = ForeignKey('Subnet', editable=True, blank=True, null=True)
+
     # XXX: removing the null=True here causes dozens of tests to fail with
     # NOT NULL constraint violations. (an empty string an NULL should mean
     # the same thing here.)