Fix flavor matching for object-storage role

When assigning a node to the `object-storage` role, the correct flavor
will not be picked, because there is a mismatch between the role name
and the flavor name (swift-storage).

This patch adds some logic to pick the correct flavor for the object
storage role.

Change-Id: Id3d5738361f791a3e1120ad3b51d8867c27e4456
Closes-Bug: #1644756

tripleo_common/tests/utils/test_parameters.py

@@ -74,3 +74,50 @@ class ParametersTest(base.TestCase):
         }
         params = parameters.set_count_and_flavor_params('my-custom-role', 1, 1)
         self.assertEqual(expected, params)
+
+    def test_swift_flavor_detected(self):
+        compute_client = mock.MagicMock()
+
+        # Mock for a compute_client.flavors.list result item and
+        # compute_client.flavors.get
+        flavor = mock.MagicMock()
+        flavor.id = 1
+        flavor.name = 'swift-storage'
+
+        # Mock result of <flavor instance>.get_keys()
+        flavor_keys = mock.MagicMock()
+        flavor_keys.get.side_effect = ('swift-storage', )
+
+        # Connecting the mock instances...
+        flavor.get_keys.side_effect = (flavor_keys, )
+        compute_client.flavors.list.side_effect = ((flavor, ),)
+        compute_client.flavors.get.side_effect = (flavor, )
+
+        # Calling `get_flavor` with an 'object-storage' role should return
+        # the 'swift-storage' flavor.
+        self.assertEqual(parameters.get_flavor('object-storage',
+                                               compute_client),
+                         'swift-storage')
+
+    def test_compute_flavor_detected(self):
+        compute_client = mock.MagicMock()
+
+        # Mock for a compute_client.flavors.list result item and
+        # compute_client.flavors.get
+        flavor = mock.MagicMock()
+        flavor.id = 1
+        flavor.name = 'compute'
+
+        # Mock result of <flavor instance>.get_keys()
+        flavor_keys = mock.MagicMock()
+        flavor_keys.get.side_effect = ('compute', )
+
+        # Connecting the mock instances...
+        flavor.get_keys.side_effect = (flavor_keys, )
+        compute_client.flavors.list.side_effect = ((flavor, ),)
+        compute_client.flavors.get.side_effect = (flavor, )
+
+        # Calling `get_flavor` with a 'compute' role should return
+        # the 'compute' flavor.
+        self.assertEqual(parameters.get_flavor('compute', compute_client),
+                         'compute')

tripleo_common/utils/parameters.py

@@ -17,6 +17,10 @@
 from tripleo_common.utils import nodes
 
 
+FLAVOR_ROLE_EXCEPTIONS = {
+    'object-storage': 'swift-storage'
+}
+
 PARAM_EXCEPTIONS = {
     'control': {
         'count': 'ControllerCount',
@@ -43,7 +47,11 @@ def get_node_count(role, baremetal_client):
 def get_flavor(role, compute_client):
     for f in compute_client.flavors.list():
         flavor = compute_client.flavors.get(f.id)
-        if flavor.get_keys().get('capabilities:profile') == role:
+        # The flavor's capabilities:profile and the role must match,
+        # unless the role has a different profile name (as defined in
+        # FLAVOR_ROLE_EXCEPTIONS).
+        if (flavor.get_keys().get('capabilities:profile') ==
+                FLAVOR_ROLE_EXCEPTIONS.get(role, role)):
             return flavor.name
     return 'baremetal'