fixes bug 919158 , default ip blocks are now optional

Change-Id: Ic15f18a7f56992afa214c667a84c834fe58566ea

etc/melange/melange.conf.sample

@@ -33,10 +33,11 @@ db_api_implementation = "melange.db.sqlalchemy.api"
 # Path to the extensions
 api_extensions_path = melange/extensions
 
-# Cidr used for auto creating private ip block in a network
+# Cidr for auto creating first ip block in a network
-default_cidr = 10.0.0.0/24
+# If unspecified, auto creating is turned off
+# default_cidr = 10.0.0.0/24
 
-#IPV6 Generator Factory
+#IPV6 Generator Factory, defaults to rfc2462
 #ipv6_generator=melange.ipv6.tenant_based_generator.TenantBasedIpV6Generator
 
 #DNS info for a data_center

melange/ipam/models.py

@@ -985,7 +985,11 @@ class Network(ModelBase):
         try:
             return cls.find_by(id=id, tenant_id=tenant_id)
         except ModelNotFoundError:
-            ip_block = IpBlock.create(cidr=config.Config.get('default_cidr'),
+            default_cidr = config.Config.get('default_cidr', None)
+            if not default_cidr:
+                raise ModelNotFoundError(_("Network %s not found") % id)
+
+            ip_block = IpBlock.create(cidr=default_cidr,
                                       network_id=id,
                                       tenant_id=tenant_id,
                                       type=IpBlock.PRIVATE_TYPE)

melange/tests/functional/test_cli.py

@@ -470,6 +470,9 @@ class TestInterfaceCLI(tests.BaseTest):
 
     def test_create(self):
         factory_models.MacAddressRangeFactory()
+        factory_models.IpBlockFactory(network_id="network_id",
+                                      tenant_id="tenant_id")
+
         exitcode, out, err = run("interface create vif_id=vif_id "
                                  "tenant_id=tenant_id "
                                  "device_id=device_id "

melange/tests/unit/test_ipam_models.py

@@ -1999,6 +1999,17 @@ class TestNetwork(tests.BaseTest):
         self.assertEqual(network.ip_blocks[0].network_id, '1')
         self.assertEqual(network.ip_blocks[0].type, 'private')
 
+    def test_find_or_create_raises_err_if_no_default_cidr_and_net_blocks(self):
+        noise_ip_block = factory_models.PublicIpBlockFactory(network_id="9999",
+                                                             tenant_id="tnt")
+
+        with unit.StubConfig(default_cidr=None):
+            self.assertRaisesExcMessage(models.ModelNotFoundError,
+                                        "Network 100 not found",
+                                        models.Network.find_or_create_by,
+                                        id="100",
+                                        tenant_id="tnt")
+
     def test_allocate_ip_to_allocate_both_ipv4_and_ipv6_addresses(self):
         ipv4_block = factory_models.PublicIpBlockFactory(network_id="1",
                                                          cidr="10.0.0.0/24",

melange/tests/unit/test_ipam_service.py

@@ -1966,6 +1966,9 @@ class TestInterfaceIpAllocationsController(ControllerTestBase):
         self.assertEqual(interface.virtual_interface_id, "123")
 
     def test_create_makes_network_owner_the_interface_owner_by_default(self):
+        network_1_block = factory_models.IpBlockFactory(tenant_id="tnt_id",
+                                                        network_id="1")
+
         path = "/ipam/tenants/tnt_id/networks/1/interfaces/123/ip_allocations"
         response = self.app.post_json(path)
 
@@ -2049,6 +2052,7 @@ class TestInterfaceIpAllocationsController(ControllerTestBase):
                          response.json['ip_addresses'])
 
     def test_create_when_network_not_found_creates_default_cidr_block(self):
+        with unit.StubConfig(default_cidr="10.0.0.0/24"):
             response = self.app.post("/ipam/tenants/tnt_id/networks/1"
                                      "/interfaces/123/ip_allocations")
 
@@ -2056,7 +2060,7 @@ class TestInterfaceIpAllocationsController(ControllerTestBase):
         ip_address_json = response.json['ip_addresses'][0]
         created_block = models.IpAddress.find(ip_address_json['id']).ip_block
         self.assertEqual(created_block.network_id, "1")
-        self.assertEqual(created_block.cidr, config.Config.get('default_cidr'))
+        self.assertEqual(created_block.cidr, "10.0.0.0/24")
         self.assertEqual(created_block.type, "private")
         self.assertEqual(created_block.tenant_id, "tnt_id")
 
@@ -2217,6 +2221,7 @@ class TestInterfacesController(ControllerTestBase):
         self.assertEquals(ipv6_address.interface_id, created_interface.id)
 
     def test_create_when_network_not_found_creates_default_cidr_block(self):
+        with unit.StubConfig(default_cidr="10.0.0.0/24"):
             self.app.post_json("/ipam/interfaces",
                                {'interface': {
                                    'id': "virt_iface",
@@ -2225,12 +2230,12 @@ class TestInterfacesController(ControllerTestBase):
                                    'network': {'id': "net1"},
                                    }
                                 })
-        interface = models.Interface.find_by(virtual_interface_id='virt_iface')
 
+        interface = models.Interface.find_by(virtual_interface_id='virt_iface')
         created_block = models.IpAddress.find_by(
             interface_id=interface.id).ip_block
         self.assertEqual(created_block.network_id, "net1")
-        self.assertEqual(created_block.cidr, config.Config.get('default_cidr'))
+        self.assertEqual(created_block.cidr, "10.0.0.0/24")
         self.assertEqual(created_block.type, "private")
         self.assertEqual(created_block.tenant_id, "tnt_id")