Merge pull request #88 from stackhpc/glance_rbd_slow

Fix performance glitch while sorting image locations

bindep.txt

@@ -24,10 +24,10 @@ postgresql-server [platform:rpm]
 postgresql-server-devel [platform:suse]  # Provides pg_config
 libpython3-dev [platform:dpkg]
 python3-devel [platform:rpm]
-qemu [platform:dpkg devstack build-image-dib]
-qemu-utils [platform:dpkg devstack build-image-dib]
-qemu-img [platform:redhat]
-qemu-tools [platform:suse]  # Provides qemu-img
+qemu [platform:dpkg devstack build-image-dib test]
+qemu-utils [platform:dpkg devstack build-image-dib test]
+qemu-img [platform:redhat test]
+qemu-tools [platform:suse test]  # Provides qemu-img
 libpq-dev [platform:dpkg]
 libpcre3-dev [platform:dpkg]
 pcre-devel [platform:redhat]

glance/common/utils.py

@@ -724,13 +724,12 @@ def get_store_weight(location):
         if not store_id:
             return 0
         try:
-            store = glance_store.get_store_from_store_identifier(store_id)
+            return glance_store.get_store_weight(store_id)
         except glance_store.exceptions.UnknownScheme:
             msg = (_LW("Unable to find store '%s', returning "
                        "default weight '0'") % store_id)
             LOG.warning(msg)
             return 0
-        return store.weight if store is not None else 0
 
     sorted_locations = sorted(locations, key=get_store_weight, reverse=True)
     LOG.debug(('Sorted locations: %s'), sorted_locations)

glance/tests/unit/common/test_utils.py

@@ -189,7 +189,7 @@ def test_sort_image_locations_multistore_disabled(self):
             'url': 'rbd://cccccccc/images/id',
             'metadata': {'store': 'rbd3'}
         }]
-        mp = "glance.common.utils.glance_store.get_store_from_store_identifier"
+        mp = "glance.common.utils.glance_store.get_store_weight"
         with mock.patch(mp) as mock_get_store:
             utils.sort_image_locations(locations)
 
@@ -215,10 +215,9 @@ def test_sort_image_locations(self):
             'url': 'rbd://cccccccc/images/id',
             'metadata': {'store': 'rbd3'}
         }]
-        mp = "glance.common.utils.glance_store.get_store_from_store_identifier"
+        mp = "glance.common.utils.glance_store.get_store_weight"
         with mock.patch(mp) as mock_get_store:
-            mock_store = mock_get_store.return_value
-            mock_store.weight = 100
+            mock_get_store.return_value = 100
             utils.sort_image_locations(locations)
 
         # Since 3 stores are configured, internal method will be called 3 times
@@ -243,7 +242,7 @@ def test_sort_image_locations_without_metadata(self):
             'url': 'rbd://cccccccc/images/id',
             'metadata': {}
         }]
-        mp = "glance.common.utils.glance_store.get_store_from_store_identifier"
+        mp = "glance.common.utils.glance_store.get_store_weight"
         with mock.patch(mp) as mock_get_store:
             utils.sort_image_locations(locations)
 
@@ -270,10 +269,9 @@ def test_sort_image_locations_with_partial_metadata(self):
             'url': 'rbd://cccccccc/images/id',
             'metadata': {}
         }]
-        mp = "glance.common.utils.glance_store.get_store_from_store_identifier"
+        mp = "glance.common.utils.glance_store.get_store_weight"
         with mock.patch(mp) as mock_get_store:
-            mock_store = mock_get_store.return_value
-            mock_store.weight = 100
+            mock_get_store.return_value = 100
             utils.sort_image_locations(locations)
 
         # Since 3 stores are configured, but only one location has
@@ -300,7 +298,7 @@ def test_sort_image_locations_unknownscheme(self):
             'url': 'rbd://cccccccc/images/id',
             'metadata': {'store': 'rbd3'}
         }]
-        mp = "glance.common.utils.glance_store.get_store_from_store_identifier"
+        mp = "glance.common.utils.glance_store.get_store_weight"
         with mock.patch(mp) as mock_get_store:
             mock_get_store.side_effect = store.UnknownScheme()
             sorted_locations = utils.sort_image_locations(locations)

requirements.txt

@@ -42,7 +42,7 @@ retrying!=1.3.0,>=1.2.3 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
 
 # Glance Store
-glance-store>=2.3.0 # Apache-2.0
+glance-store @ git+https://github.com/stackhpc/glance_store@stackhpc/4.7.0.3 # Apache-2.0
 
 
 debtcollector>=1.19.0 # Apache-2.0

tox.ini

@@ -17,6 +17,7 @@ setenv =
   OS_TEST_DBAPI_ADMIN_CONNECTION=sqlite:////tmp/placeholder-never-created-nor-used.db
 # TODO(stephenfin): Remove once we bump our upper-constraint to SQLAlchemy 2.0
   SQLALCHEMY_WARN_20=1
+  TOX_CONSTRAINTS_FILE=https://raw.githubusercontent.com/stackhpc/requirements/refs/heads/stackhpc/2024.1/upper-constraints.txt
 usedevelop = True
 install_command = python -m pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2024.1} {opts} {packages}
 deps = -r{toxinidir}/test-requirements.txt