Permit specifying instance networks to use.

Provider.networks can now be specified as a list of dicts containing
the same parameters that 'nova boot --nic ....' would take - e.g.
net-id: 'someuuid'.

Change-Id: Ie34c3636f8a2fce6aae0ceb249294eaba6a92d35
Co-Authored-By: Robert Collins <rbtcollins@hp.com>

nodepool/nodepool.py

@@ -649,6 +649,9 @@ class NodePool(threading.Thread):
             p.pool = provider.get('pool')
             p.rate = provider.get('rate', 1.0)
             p.boot_timeout = provider.get('boot-timeout', 60)
+            p.use_neutron = bool(provider.get('networks', ()))
+            if p.use_neutron:
+                p.nics = provider.get('networks')
             p.images = {}
             for image in provider['images']:
                 i = ProviderImage()

nodepool/provider_manager.py

@@ -282,6 +282,8 @@ class ProviderManager(TaskManager):
         create_args = dict(name=name, image=image_id, flavor=flavor['id'])
         if key_name:
             create_args['key_name'] = key_name
+        if self.provider.use_neutron:
+            create_args['nics'] = self.provider.nics
 
         return self.submitTask(CreateServerTask(**create_args))
 

tools/fake.yaml

@@ -19,6 +19,8 @@ providers:
     project-id: 'fake'
     max-servers: 96
     pool: 'fake'
+    networks:
+      - net-id: 'some-uuid'
     images:
       - name: nodepool-fake
         base-image: 'Fake Precise'