Update Keystone core to Mitaka.

Change-Id: Ia10d6add16f4a9d25d1f42d420661c46332e69db

4 files changed, 56 insertions, 30 deletions

diff --git a/keystone-moon/keystone/common/kvs/__init__.py b/keystone-moon/keystone/common/kvs/__init__.py
index 9a406a85..354bbd8a 100644
--- a/keystone-moon/keystone/common/kvs/__init__.py
+++ b/keystone-moon/keystone/common/kvs/__init__.py
@@ -15,7 +15,6 @@
 from dogpile.cache import region
 
 from keystone.common.kvs.core import *  # noqa
-from keystone.common.kvs.legacy import Base, DictKvs, INMEMDB  # noqa
 
 
 # NOTE(morganfainberg): Provided backends are registered here in the __init__
diff --git a/keystone-moon/keystone/common/kvs/backends/inmemdb.py b/keystone-moon/keystone/common/kvs/backends/inmemdb.py
index 68072ef4..379b54bf 100644
--- a/keystone-moon/keystone/common/kvs/backends/inmemdb.py
+++ b/keystone-moon/keystone/common/kvs/backends/inmemdb.py
@@ -12,9 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-"""
-Keystone In-Memory Dogpile.cache backend implementation.
-"""
+"""Keystone In-Memory Dogpile.cache backend implementation."""
 
 import copy
 
@@ -40,6 +38,7 @@ class MemoryBackend(api.CacheBackend):
             'keystone.common.kvs.Memory'
         )
     """
+
     def __init__(self, arguments):
         self._db = {}
 
diff --git a/keystone-moon/keystone/common/kvs/backends/memcached.py b/keystone-moon/keystone/common/kvs/backends/memcached.py
index f54c1a01..a65cf877 100644
--- a/keystone-moon/keystone/common/kvs/backends/memcached.py
+++ b/keystone-moon/keystone/common/kvs/backends/memcached.py
@@ -12,26 +12,22 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-"""
-Keystone Memcached dogpile.cache backend implementation.
-"""
+"""Keystone Memcached dogpile.cache backend implementation."""
 
 import random as _random
 import time
 
 from dogpile.cache import api
 from dogpile.cache.backends import memcached
+from oslo_cache.backends import memcache_pool
 from oslo_config import cfg
-from oslo_log import log
 from six.moves import range
 
-from keystone.common.cache.backends import memcache_pool
 from keystone import exception
 from keystone.i18n import _
 
 
 CONF = cfg.CONF
-LOG = log.getLogger(__name__)
 NO_VALUE = api.NO_VALUE
 random = _random.SystemRandom()
 
@@ -49,6 +45,7 @@ class MemcachedLock(object):
     http://amix.dk/blog/post/19386
 
     """
+
     def __init__(self, client_fn, key, lock_timeout, max_lock_attempts):
         self.client_fn = client_fn
         self.key = "_lock" + key
@@ -63,7 +60,9 @@ class MemcachedLock(object):
             elif not wait:
                 return False
             else:
-                sleep_time = random.random()
+                sleep_time = random.random()  # nosec : random is not used for
+                # crypto or security, it's just the time to delay between
+                # retries.
                 time.sleep(sleep_time)
         raise exception.UnexpectedError(
             _('Maximum lock attempts on %s occurred.') % self.key)
@@ -81,6 +80,7 @@ class MemcachedBackend(object):
     time `memcached`, `bmemcached`, `pylibmc` and `pooled_memcached` are
     valid).
     """
+
     def __init__(self, arguments):
         self._key_mangler = None
         self.raw_no_expiry_keys = set(arguments.pop('no_expiry_keys', set()))
diff --git a/keystone-moon/keystone/common/kvs/core.py b/keystone-moon/keystone/common/kvs/core.py
index 6ce7b318..064825f8 100644
--- a/keystone-moon/keystone/common/kvs/core.py
+++ b/keystone-moon/keystone/common/kvs/core.py
@@ -25,6 +25,7 @@ from dogpile.core import nameregistry
 from oslo_config import cfg
 from oslo_log import log
 from oslo_utils import importutils
+from oslo_utils import reflection
 
 from keystone import exception
 from keystone.i18n import _
@@ -32,8 +33,8 @@ from keystone.i18n import _LI
 from keystone.i18n import _LW
 
 
-__all__ = ['KeyValueStore', 'KeyValueStoreLock', 'LockTimeout',
-           'get_key_value_store']
+__all__ = ('KeyValueStore', 'KeyValueStoreLock', 'LockTimeout',
+           'get_key_value_store')
 
 
 BACKENDS_REGISTERED = False
@@ -66,6 +67,23 @@ def _register_backends():
         BACKENDS_REGISTERED = True
 
 
+def sha1_mangle_key(key):
+    """Wrapper for dogpile's sha1_mangle_key.
+
+    Taken from oslo_cache.core._sha1_mangle_key
+
+    dogpile's sha1_mangle_key function expects an encoded string, so we
+    should take steps to properly handle multiple inputs before passing
+    the key through.
+    """
+    try:
+        key = key.encode('utf-8', errors='xmlcharrefreplace')
+    except (UnicodeError, AttributeError):  # nosec
+        # NOTE(stevemar): if encoding fails just continue anyway.
+        pass
+    return dogpile_util.sha1_mangle_key(key)
+
+
 class LockTimeout(exception.UnexpectedError):
     debug_message_format = _('Lock Timeout occurred for key, %(target)s')
 
@@ -76,6 +94,7 @@ class KeyValueStore(object):
     This manager also supports the concept of locking a given key resource to
     allow for a guaranteed atomic transaction to the backend.
     """
+
     def __init__(self, kvs_region):
         self.locking = True
         self._lock_timeout = 0
@@ -95,7 +114,6 @@ class KeyValueStore(object):
                         this instantiation
         :param region_config_args: key-word args passed to the dogpile.cache
                                    backend for configuration
-        :return:
         """
         if self.is_configured:
             # NOTE(morganfainberg): It is a bad idea to reconfigure a backend,
@@ -130,12 +148,16 @@ class KeyValueStore(object):
                 if issubclass(pxy, proxy.ProxyBackend):
                     proxies.append(pxy)
                 else:
+                    pxy_cls_name = reflection.get_class_name(
+                        pxy, fully_qualified=False)
                     LOG.warning(_LW('%s is not a dogpile.proxy.ProxyBackend'),
-                                pxy.__name__)
+                                pxy_cls_name)
 
             for proxy_cls in reversed(proxies):
+                proxy_cls_name = reflection.get_class_name(
+                    proxy_cls, fully_qualified=False)
                 LOG.info(_LI('Adding proxy \'%(proxy)s\' to KVS %(name)s.'),
-                         {'proxy': proxy_cls.__name__,
+                         {'proxy': proxy_cls_name,
                           'name': self._region.name})
                 self._region.wrap(proxy_cls)
 
@@ -196,14 +218,14 @@ class KeyValueStore(object):
                     raise exception.ValidationError(
                         _('`key_mangler` option must be a function reference'))
             else:
-                LOG.info(_LI('Using default dogpile sha1_mangle_key as KVS '
-                             'region %s key_mangler'), self._region.name)
-                # NOTE(morganfainberg): Sane 'default' keymangler is the
-                # dogpile sha1_mangle_key function.  This ensures that unless
-                # explicitly changed, we mangle keys.  This helps to limit
-                # unintended cases of exceeding cache-key in backends such
-                # as memcache.
-                self._region.key_mangler = dogpile_util.sha1_mangle_key
+                msg = _LI('Using default keystone.common.kvs.sha1_mangle_key '
+                          'as KVS region %s key_mangler')
+                LOG.info(msg, self._region.name)
+                # NOTE(morganfainberg): Use 'default' keymangler to ensure
+                # that unless explicitly changed, we mangle keys.  This helps
+                # to limit unintended cases of exceeding cache-key in backends
+                # such as memcache.
+                self._region.key_mangler = sha1_mangle_key
             self._set_keymangler_on_backend(self._region.key_mangler)
         else:
             LOG.info(_LI('KVS region %s key_mangler disabled.'),
@@ -251,6 +273,7 @@ class KeyValueStore(object):
 
     class _LockWrapper(object):
         """weakref-capable threading.Lock wrapper."""
+
         def __init__(self, lock_timeout):
             self.lock = threading.Lock()
             self.lock_timeout = lock_timeout
@@ -339,8 +362,9 @@ class KeyValueStore(object):
 
     @contextlib.contextmanager
     def _action_with_lock(self, key, lock=None):
-        """Wrapper context manager to validate and handle the lock and lock
-        timeout if passed in.
+        """Wrapper context manager.
+
+        Validates and handles the lock and lock timeout if passed in.
         """
         if not isinstance(lock, KeyValueStoreLock):
             # NOTE(morganfainberg): Locking only matters if a lock is passed in
@@ -362,11 +386,13 @@ class KeyValueStore(object):
 
 
 class KeyValueStoreLock(object):
-    """Basic KeyValueStoreLock context manager that hooks into the
-    dogpile.cache backend mutex allowing for distributed locking on resources.
+    """Basic KeyValueStoreLock context manager.
 
-    This is only a write lock, and will not prevent reads from occurring.
+    Hooks into the dogpile.cache backend mutex allowing for distributed locking
+    on resources. This is only a write lock, and will not prevent reads from
+    occurring.
     """
+
     def __init__(self, mutex, key, locking_enabled=True, lock_timeout=0):
         self.mutex = mutex
         self.key = key
@@ -407,7 +433,9 @@ class KeyValueStoreLock(object):
 
 
 def get_key_value_store(name, kvs_region=None):
-    """Instantiate a new :class:`.KeyValueStore` or return a previous
+    """Retrieve key value store.
+
+    Instantiate a new :class:`.KeyValueStore` or return a previous
     instantiation that has the same name.
     """
     global KEY_VALUE_STORE_REGISTRY