Add vni-ranges option for supporting vxlan

Add vni-ranges option for supporting editable vxlan range

Change-Id: I6988aa64ca179c28093da6e6263dc00b35e972fd
Closes-Bug: 1545886

config.yaml

@@ -127,6 +127,11 @@ options:
       <physical_network> specifying physical_network names usable for VLAN
       provider and tenant networks, as well as ranges of VLAN tags on each
       available for allocation to tenant networks.
+  vni-ranges:
+    type: string
+    default: "1001:2000"
+    description: |
+      Space-delimited list of <vxlan_min>:<vxlan_max> for VXLAN provider.
   # Quota configuration settings
   quota-security-group:
     default: 10

hooks/neutron_api_context.py

@@ -233,6 +233,10 @@ class NeutronCCContext(context.NeutronContext):
         if vlan_ranges:
             ctxt['vlan_ranges'] = ','.join(vlan_ranges.split())
 
+        vni_ranges = config('vni-ranges')
+        if vni_ranges:
+            ctxt['vni_ranges'] = ','.join(vni_ranges.split())
+
         ctxt['enable_ml2_port_security'] = config('enable-ml2-port-security')
 
         return ctxt

templates/icehouse/ml2_conf.ini

@@ -16,7 +16,7 @@ mechanism_drivers = openvswitch,hyperv,l2population
 tunnel_id_ranges = 1:1000
 
 [ml2_type_vxlan]
-vni_ranges = 1001:2000
+vni_ranges = {{ vni_ranges }}
 
 [ml2_type_vlan]
 network_vlan_ranges = {{ vlan_ranges }}

templates/kilo/ml2_conf.ini

@@ -20,7 +20,7 @@ mechanism_drivers = openvswitch,l2population
 tunnel_id_ranges = 1:1000
 
 [ml2_type_vxlan]
-vni_ranges = 1001:2000
+vni_ranges = {{ vni_ranges }}
 
 [ml2_type_vlan]
 network_vlan_ranges = {{ vlan_ranges }}

unit_tests/test_neutron_api_context.py

@@ -319,6 +319,7 @@ class NeutronCCContextTest(CharmTestCase):
             'quota_subnet': 10,
             'quota_vip': 10,
             'vlan_ranges': 'physnet1:1000:2000',
+            'vni_ranges': '1001:2000',
             'enable_ml2_port_security': True
         }
         napi_ctxt = context.NeutronCCContext()
@@ -332,6 +333,7 @@ class NeutronCCContextTest(CharmTestCase):
         plugin.return_value = None
         self.test_config.set('flat-network-providers', 'physnet2 physnet3')
         self.test_config.set('overlay-network-type', 'vxlan')
+        self.test_config.set('vni-ranges', '1001:2000 3001:4000')
         ctxt_data = {
             'debug': True,
             'enable_dvr': False,
@@ -354,6 +356,7 @@ class NeutronCCContextTest(CharmTestCase):
             'quota_subnet': 10,
             'quota_vip': 10,
             'vlan_ranges': 'physnet1:1000:2000',
+            'vni_ranges': '1001:2000,3001:4000',
             'network_providers': 'physnet2,physnet3',
             'enable_ml2_port_security': True
         }
@@ -395,6 +398,7 @@ class NeutronCCContextTest(CharmTestCase):
             'quota_subnet': 10,
             'quota_vip': 10,
             'vlan_ranges': 'physnet1:1000:2000',
+            'vni_ranges': '1001:2000',
             'enable_ml2_port_security': True
         }
         napi_ctxt = context.NeutronCCContext()