Expose cinder's scheduler pool API

Make the scheduler pool API available to other clients.

DocImpact
Change-Id: I3f0e0c2ed806b5bfda3129ed2c5b210b9210daa5
Partially-Implements: blueprint get-volume-type-extra-specs

cinderclient/tests/v2/fakes.py

@@ -956,11 +956,22 @@ class FakeHTTPClient(base_client.HTTPClient):
         return (202, {}, {})
 
     def get_scheduler_stats_get_pools(self, **kw):
-        return (200, {}, {
-            "pools": [
-                {"name": "test1@backend1#pool",
+        stats = [
+            {
+                "name": "ubuntu@lvm#backend_name",
                 "capabilities": {
-                     "pool_name": "pool",
-                     "volume_backend_name": "backend",
-                     "storage_protocol": "iSCSI"}}]
-        })
+                    "pool_name": "backend_name",
+                    "QoS_support": False,
+                    "timestamp": "2014-11-21T18:15:28.141161",
+                    "allocated_capacity_gb": 0,
+                    "volume_backend_name": "backend_name",
+                    "free_capacity_gb": 7.01,
+                    "driver_version": "2.0.0",
+                    "total_capacity_gb": 10.01,
+                    "reserved_percentage": 0,
+                    "vendor_name": "Open Source",
+                    "storage_protocol": "iSCSI",
+                }
+            },
+        ]
+        return (200, {}, {"pools": stats})

cinderclient/tests/v2/test_pools.py

@@ -0,0 +1,44 @@
+# Copyright (C) 2015 Hewlett-Packard Development Company, L.P.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from cinderclient.v2.pools import Pool
+from cinderclient.tests import utils
+from cinderclient.tests.v2 import fakes
+
+cs = fakes.FakeClient()
+
+
+class PoolsTest(utils.TestCase):
+
+    def test_get_pool_stats(self):
+        sl = cs.pools.list()
+        cs.assert_called('GET', '/scheduler-stats/get_pools')
+        for s in sl:
+            self.assertIsInstance(s, Pool)
+            self.assertTrue(hasattr(s, "name"))
+            self.assertFalse(hasattr(s, "capabilities"))
+            # basic list should not have volume_backend_name (or any other
+            # entries from capabilities)
+            self.assertFalse(hasattr(s, "volume_backend_name"))
+
+    def test_get_detail_pool_stats(self):
+        sl = cs.pools.list(detailed=True)
+        cs.assert_called('GET', '/scheduler-stats/get_pools?detail=True')
+        for s in sl:
+            self.assertIsInstance(s, Pool)
+            self.assertTrue(hasattr(s, "name"))
+            self.assertFalse(hasattr(s, "capabilities"))
+            # detail list should have a volume_backend_name (from capabilities)
+            self.assertTrue(hasattr(s, "volume_backend_name"))

cinderclient/v2/client.py

@@ -18,6 +18,7 @@ from cinderclient.v2 import availability_zones
 from cinderclient.v2 import cgsnapshots
 from cinderclient.v2 import consistencygroups
 from cinderclient.v2 import limits
+from cinderclient.v2 import pools
 from cinderclient.v2 import qos_specs
 from cinderclient.v2 import quota_classes
 from cinderclient.v2 import quotas
@@ -75,6 +76,7 @@ class Client(object):
         self.cgsnapshots = cgsnapshots.CgsnapshotManager(self)
         self.availability_zones = \
             availability_zones.AvailabilityZoneManager(self)
+        self.pools = pools.PoolManager(self)
 
         # Add in any extensions...
         if extensions:

cinderclient/v2/pools.py

@@ -0,0 +1,62 @@
+# Copyright (C) 2015 Hewlett-Packard Development Company, L.P.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+"""Pools interface (v2 extension)"""
+
+import six
+
+from cinderclient import base
+
+
+class Pool(base.Resource):
+    NAME_ATTR = 'name'
+
+    def __repr__(self):
+        return "<Pool: %s>" % self.name
+
+
+class PoolManager(base.Manager):
+    """Manage :class:`Pool` resources."""
+    resource_class = Pool
+
+    def list(self, detailed=False):
+        """Lists all
+
+        :rtype: list of :class:`Pool`
+        """
+        if detailed is True:
+            pools = self._list("/scheduler-stats/get_pools?detail=True",
+                               "pools")
+            # Other than the name, all of the pool data is buried below in
+            # a 'capabilities' dictionary. In order to be consistent with the
+            # get-pools command line, these elements are moved up a level to
+            # be attributes of the pool itself.
+            for pool in pools:
+                if hasattr(pool, 'capabilities'):
+                    for k, v in six.iteritems(pool.capabilities):
+                        setattr(pool, k, v)
+
+                    # Remove the capabilities dictionary since all of its
+                    # elements have been copied up to the containing pool
+                    del pool.capabilities
+            return pools
+        else:
+            pools = self._list("/scheduler-stats/get_pools", "pools")
+
+            # avoid cluttering the basic pool list with capabilities dict
+            for pool in pools:
+                if hasattr(pool, 'capabilities'):
+                    del pool.capabilities
+            return pools