Add driver filter and evaluator for scheduler
This patch adds a new filter for the cinder scheduler that can interpret two new properties provided by backends, 'filter_function' and 'goodness_function'. A driver can rely on cinder.conf entries to define these properties for a backend or the driver can generate them some other way. An evaluator is used by the filter to parse the properties. The 'goodness_function' property is used to weigh qualified backends in case multiple ones pass the filter. More details can be found in the spec: https://review.openstack.org/#/c/129330/ Implements: blueprint filtering-weighing-with-driver-supplied-functions DocImpact: New optional backend properties in cinder.conf. New filter and weigher available for scheduler. Change-Id: I38408ab49b6ed869c1faae746ee64a3bae86be58
This commit is contained in:
Anthony Lee
parent
48eb05aa84
commit
59bf887ea9
@ -633,6 +633,10 @@ class ExtendVolumeError(CinderException):
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message = _("Error extending volume: %(reason)s")
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class EvaluatorParseException(Exception):
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message = _("Error during evaluator parsing: %(reason)s")
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# Driver specific exceptions
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# Coraid
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class CoraidException(VolumeDriverException):
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0
cinder/scheduler/evaluator/__init__.py
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0
cinder/scheduler/evaluator/__init__.py
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297
cinder/scheduler/evaluator/evaluator.py
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297
cinder/scheduler/evaluator/evaluator.py
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@ -0,0 +1,297 @@
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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import operator
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import re
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import pyparsing
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import six
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from cinder import exception
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from cinder.i18n import _
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def _operatorOperands(tokenList):
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it = iter(tokenList)
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while 1:
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try:
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op1 = next(it)
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op2 = next(it)
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yield(op1, op2)
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except StopIteration:
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break
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class EvalConstant(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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result = self.value
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if (isinstance(result, six.string_types) and
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re.match("^[a-zA-Z_]+\.[a-zA-Z_]+$", result)):
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(which_dict, entry) = result.split('.')
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try:
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result = _vars[which_dict][entry]
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except KeyError as e:
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msg = _("KeyError: %s") % e
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raise exception.EvaluatorParseException(msg)
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except TypeError as e:
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msg = _("TypeError: %s") % e
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raise exception.EvaluatorParseException(msg)
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try:
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result = int(result)
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except ValueError:
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try:
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result = float(result)
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except ValueError as e:
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msg = _("ValueError: %s") % e
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raise exception.EvaluatorParseException(msg)
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return result
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class EvalSignOp(object):
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operations = {
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'+': 1,
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'-': -1,
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}
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def __init__(self, toks):
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self.sign, self.value = toks[0]
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def eval(self):
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return self.operations[self.sign] * self.value.eval()
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class EvalAddOp(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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sum = self.value[0].eval()
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for op, val in _operatorOperands(self.value[1:]):
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if op == '+':
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sum += val.eval()
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elif op == '-':
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sum -= val.eval()
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return sum
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class EvalMultOp(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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prod = self.value[0].eval()
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for op, val in _operatorOperands(self.value[1:]):
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try:
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if op == '*':
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prod *= val.eval()
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elif op == '/':
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prod /= float(val.eval())
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except ZeroDivisionError as e:
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msg = _("ZeroDivisionError: %s") % e
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raise exception.EvaluatorParseException(msg)
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return prod
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class EvalPowerOp(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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prod = self.value[0].eval()
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for op, val in _operatorOperands(self.value[1:]):
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prod = pow(prod, val.eval())
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return prod
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class EvalNegateOp(object):
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def __init__(self, toks):
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self.negation, self.value = toks[0]
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def eval(self):
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return not self.value.eval()
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class EvalComparisonOp(object):
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operations = {
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"<": operator.lt,
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"<=": operator.le,
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">": operator.gt,
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">=": operator.ge,
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"!=": operator.ne,
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"==": operator.eq,
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"<>": operator.ne,
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}
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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val1 = self.value[0].eval()
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for op, val in _operatorOperands(self.value[1:]):
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fn = self.operations[op]
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val2 = val.eval()
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if not fn(val1, val2):
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break
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val1 = val2
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else:
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return True
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return False
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class EvalTernaryOp(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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condition = self.value[0].eval()
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if condition:
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return self.value[2].eval()
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else:
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return self.value[4].eval()
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class EvalFunction(object):
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functions = {
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"abs": abs,
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"max": max,
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"min": min,
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}
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def __init__(self, toks):
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self.func, self.value = toks[0]
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def eval(self):
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args = self.value.eval()
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if type(args) is list:
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return self.functions[self.func](*args)
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else:
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return self.functions[self.func](args)
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class EvalCommaSeperator(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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val1 = self.value[0].eval()
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val2 = self.value[2].eval()
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if type(val2) is list:
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val_list = []
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val_list.append(val1)
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for val in val2:
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val_list.append(val)
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return val_list
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return [val1, val2]
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class EvalBoolAndOp(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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left = self.value[0].eval()
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right = self.value[2].eval()
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return left and right
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class EvalBoolOrOp(object):
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def __init__(self, toks):
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self.value = toks[0]
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def eval(self):
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left = self.value[0].eval()
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right = self.value[2].eval()
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return left or right
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_parser = None
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_vars = {}
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def _def_parser():
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# Enabling packrat parsing greatly speeds up the parsing.
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pyparsing.ParserElement.enablePackrat()
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alphas = pyparsing.alphas
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Combine = pyparsing.Combine
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Forward = pyparsing.Forward
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nums = pyparsing.nums
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oneOf = pyparsing.oneOf
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opAssoc = pyparsing.opAssoc
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operatorPrecedence = pyparsing.operatorPrecedence
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Word = pyparsing.Word
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integer = Word(nums)
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real = Combine(Word(nums) + '.' + Word(nums))
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variable = Word(alphas + '_' + '.')
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number = real | integer
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expr = Forward()
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fn = Word(alphas + '_' + '.')
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operand = number | variable | fn
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signop = oneOf('+ -')
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addop = oneOf('+ -')
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multop = oneOf('* /')
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comparisonop = oneOf(' '.join(EvalComparisonOp.operations.keys()))
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ternaryop = ('?', ':')
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boolandop = oneOf('AND and &&')
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boolorop = oneOf('OR or ||')
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negateop = oneOf('NOT not !')
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operand.setParseAction(EvalConstant)
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expr = operatorPrecedence(operand, [
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(fn, 1, opAssoc.RIGHT, EvalFunction),
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("^", 2, opAssoc.RIGHT, EvalPowerOp),
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(signop, 1, opAssoc.RIGHT, EvalSignOp),
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(multop, 2, opAssoc.LEFT, EvalMultOp),
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(addop, 2, opAssoc.LEFT, EvalAddOp),
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(negateop, 1, opAssoc.RIGHT, EvalNegateOp),
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(comparisonop, 2, opAssoc.LEFT, EvalComparisonOp),
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(ternaryop, 3, opAssoc.LEFT, EvalTernaryOp),
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(boolandop, 2, opAssoc.LEFT, EvalBoolAndOp),
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(boolorop, 2, opAssoc.LEFT, EvalBoolOrOp),
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(',', 2, opAssoc.RIGHT, EvalCommaSeperator), ])
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return expr
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def evaluate(expression, **kwargs):
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"""Evaluates an expression.
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Provides the facility to evaluate mathematical expressions, and to
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substitute variables from dictionaries into those expressions.
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Supports both integer and floating point values, and automatic
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promotion where necessary.
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"""
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global _parser
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if _parser is None:
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_parser = _def_parser()
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global _vars
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_vars = kwargs
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try:
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result = _parser.parseString(expression, parseAll=True)[0]
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except pyparsing.ParseException as e:
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msg = _("ParseException: %s") % e
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raise exception.EvaluatorParseException(msg)
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return result.eval()
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145
cinder/scheduler/filters/driver_filter.py
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145
cinder/scheduler/filters/driver_filter.py
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@ -0,0 +1,145 @@
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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import six
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from cinder.i18n import _LW
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from cinder.openstack.common import log as logging
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from cinder.openstack.common.scheduler import filters
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from cinder.scheduler.evaluator import evaluator
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LOG = logging.getLogger(__name__)
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class DriverFilter(filters.BaseHostFilter):
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"""DriverFilter filters hosts based on a 'filter function' and metrics.
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DriverFilter filters based on volume host's provided 'filter function'
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and metrics.
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"""
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def host_passes(self, host_state, filter_properties):
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"""Determines whether a host has a passing filter_function or not."""
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stats = self._generate_stats(host_state, filter_properties)
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LOG.debug("Checking host '%s'", stats['host_stats']['host'])
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result = self._check_filter_function(stats)
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LOG.debug("Result: %s", result)
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LOG.debug("Done checking host '%s'", stats['host_stats']['host'])
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return result
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def _check_filter_function(self, stats):
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"""Checks if a volume passes a host's filter function.
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Returns a tuple in the format (filter_passing, filter_invalid).
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Both values are booleans.
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"""
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host_stats = stats['host_stats']
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extra_specs = stats['extra_specs']
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# Check that the volume types match
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if (extra_specs is None or 'volume_backend_name' not in extra_specs):
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LOG.warning(_LW("No 'volume_backend_name' key in extra_specs. "
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"Skipping volume backend name check."))
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elif (extra_specs['volume_backend_name'] !=
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host_stats['volume_backend_name']):
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LOG.warning(_LW("Volume backend names do not match: '%(target)s' "
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"vs '%(current)s' :: Skipping"),
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{'target': extra_specs['volume_backend_name'],
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'current': host_stats['volume_backend_name']})
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return False
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if stats['filter_function'] is None:
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LOG.warning(_LW("Filter function not set :: passing host"))
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return True
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try:
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filter_result = self._run_evaluator(stats['filter_function'],
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stats)
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except Exception as ex:
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# Warn the admin for now that there is an error in the
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# filter function.
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LOG.warning(_LW("Error in filtering function "
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"'%(function)s' : '%(error)s' :: failing host"),
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{'function': stats['filter_function'],
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'error': ex, })
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return False
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return filter_result
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def _run_evaluator(self, func, stats):
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"""Evaluates a given function using the provided available stats."""
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host_stats = stats['host_stats']
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host_caps = stats['host_caps']
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extra_specs = stats['extra_specs']
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qos_specs = stats['qos_specs']
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volume_stats = stats['volume_stats']
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result = evaluator.evaluate(
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func,
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extra=extra_specs,
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stats=host_stats,
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capabilities=host_caps,
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volume=volume_stats,
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qos=qos_specs)
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return result
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def _generate_stats(self, host_state, filter_properties):
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"""Generates statistics from host and volume data."""
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host_stats = {
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'host': host_state.host,
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'volume_backend_name': host_state.volume_backend_name,
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'vendor_name': host_state.vendor_name,
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'driver_version': host_state.driver_version,
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'storage_protocol': host_state.storage_protocol,
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'QoS_support': host_state.QoS_support,
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'total_capacity_gb': host_state.total_capacity_gb,
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'allocated_capacity_gb': host_state.allocated_capacity_gb,
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'free_capacity_gb': host_state.free_capacity_gb,
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'reserved_percentage': host_state.reserved_percentage,
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'updated': host_state.updated,
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}
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host_caps = host_state.capabilities
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filter_function = None
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if ('filter_function' in host_caps and
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host_caps['filter_function'] is not None):
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filter_function = six.text_type(host_caps['filter_function'])
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qos_specs = filter_properties.get('qos_specs', {})
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volume_type = filter_properties.get('volume_type', {})
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extra_specs = volume_type.get('extra_specs', {})
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request_spec = filter_properties.get('request_spec', {})
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volume_stats = request_spec.get('volume_properties', {})
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stats = {
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'host_stats': host_stats,
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'host_caps': host_caps,
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'extra_specs': extra_specs,
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'qos_specs': qos_specs,
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'volume_stats': volume_stats,
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'volume_type': volume_type,
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'filter_function': filter_function,
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}
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return stats
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143
cinder/scheduler/weights/goodness.py
Normal file
143
cinder/scheduler/weights/goodness.py
Normal file
@ -0,0 +1,143 @@
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# Copyright (C) 2014 Hewlett-Packard Development Company, L.P.
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#
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# 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.
|
||||
|
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import six
|
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|
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from cinder.i18n import _LW
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from cinder.openstack.common import log as logging
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from cinder.openstack.common.scheduler import weights
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from cinder.scheduler.evaluator import evaluator
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LOG = logging.getLogger(__name__)
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class GoodnessWeigher(weights.BaseHostWeigher):
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"""Goodness Weigher. Assign weights based on a host's goodness function.
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Goodness rating is the following:
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0 -- host is a poor choice
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...
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50 -- host is a good choice
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...
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100 -- host is a perfect choice
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"""
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|
||||
def _weigh_object(self, host_state, weight_properties):
|
||||
"""Determine host's goodness rating based on a goodness_function."""
|
||||
stats = self._generate_stats(host_state, weight_properties)
|
||||
LOG.debug("Checking host '%s'", stats['host_stats']['host'])
|
||||
result = self._check_goodness_function(stats)
|
||||
LOG.debug("Goodness: %s", result)
|
||||
LOG.debug("Done checking host '%s'", stats['host_stats']['host'])
|
||||
|
||||
return result
|
||||
|
||||
def _check_goodness_function(self, stats):
|
||||
"""Gets a host's goodness rating based on its goodness function."""
|
||||
|
||||
goodness_rating = 0
|
||||
|
||||
if stats['goodness_function'] is None:
|
||||
LOG.warning(_LW("Goodness function not set :: defaulting to "
|
||||
"minimal goodness rating of 0"))
|
||||
else:
|
||||
try:
|
||||
goodness_result = self._run_evaluator(
|
||||
stats['goodness_function'],
|
||||
stats)
|
||||
except Exception as ex:
|
||||
LOG.warning(_LW("Error in goodness_function function "
|
||||
"'%(function)s' : '%(error)s' :: Defaulting "
|
||||
"to a goodness of 0"),
|
||||
{'function': stats['goodness_function'],
|
||||
'error': ex, })
|
||||
return goodness_rating
|
||||
|
||||
if type(goodness_result) is bool:
|
||||
if goodness_result:
|
||||
goodness_rating = 100
|
||||
elif goodness_result < 0 or goodness_result > 100:
|
||||
LOG.warning(_LW("Invalid goodness result. Result must be "
|
||||
"between 0 and 100. Result generated: '%s' "
|
||||
":: Defaulting to a goodness of 0"),
|
||||
goodness_result)
|
||||
else:
|
||||
goodness_rating = goodness_result
|
||||
|
||||
return goodness_rating
|
||||
|
||||
def _run_evaluator(self, func, stats):
|
||||
"""Evaluates a given function using the provided available stats."""
|
||||
host_stats = stats['host_stats']
|
||||
host_caps = stats['host_caps']
|
||||
extra_specs = stats['extra_specs']
|
||||
qos_specs = stats['qos_specs']
|
||||
volume_stats = stats['volume_stats']
|
||||
|
||||
result = evaluator.evaluate(
|
||||
func,
|
||||
extra=extra_specs,
|
||||
stats=host_stats,
|
||||
capabilities=host_caps,
|
||||
volume=volume_stats,
|
||||
qos=qos_specs)
|
||||
|
||||
return result
|
||||
|
||||
def _generate_stats(self, host_state, weight_properties):
|
||||
"""Generates statistics from host and volume data."""
|
||||
|
||||
host_stats = {
|
||||
'host': host_state.host,
|
||||
'volume_backend_name': host_state.volume_backend_name,
|
||||
'vendor_name': host_state.vendor_name,
|
||||
'driver_version': host_state.driver_version,
|
||||
'storage_protocol': host_state.storage_protocol,
|
||||
'QoS_support': host_state.QoS_support,
|
||||
'total_capacity_gb': host_state.total_capacity_gb,
|
||||
'allocated_capacity_gb': host_state.allocated_capacity_gb,
|
||||
'free_capacity_gb': host_state.free_capacity_gb,
|
||||
'reserved_percentage': host_state.reserved_percentage,
|
||||
'updated': host_state.updated,
|
||||
}
|
||||
|
||||
host_caps = host_state.capabilities
|
||||
|
||||
goodness_function = None
|
||||
|
||||
if ('goodness_function' in host_caps and
|
||||
host_caps['goodness_function'] is not None):
|
||||
goodness_function = six.text_type(host_caps['goodness_function'])
|
||||
|
||||
qos_specs = weight_properties.get('qos_specs', {})
|
||||
|
||||
volume_type = weight_properties.get('volume_type', {})
|
||||
extra_specs = volume_type.get('extra_specs', {})
|
||||
|
||||
request_spec = weight_properties.get('request_spec', {})
|
||||
volume_stats = request_spec.get('volume_properties', {})
|
||||
|
||||
stats = {
|
||||
'host_stats': host_stats,
|
||||
'host_caps': host_caps,
|
||||
'extra_specs': extra_specs,
|
||||
'qos_specs': qos_specs,
|
||||
'volume_stats': volume_stats,
|
||||
'volume_type': volume_type,
|
||||
'goodness_function': goodness_function,
|
||||
}
|
||||
|
||||
return stats
|
||||
185
cinder/tests/scheduler/test_goodness_weigher.py
Normal file
185
cinder/tests/scheduler/test_goodness_weigher.py
Normal file
@ -0,0 +1,185 @@
|
||||
# Copyright (C) 2014 Hewlett-Packard Development Company, L.P.
|
||||
#
|
||||
# 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.
|
||||
"""
|
||||
Tests For Goodness Weigher.
|
||||
"""
|
||||
|
||||
from cinder.scheduler.weights.goodness import GoodnessWeigher
|
||||
from cinder import test
|
||||
from cinder.tests.scheduler import fakes
|
||||
|
||||
|
||||
class GoodnessWeigherTestCase(test.TestCase):
|
||||
def setUp(self):
|
||||
super(GoodnessWeigherTestCase, self).setUp()
|
||||
|
||||
def test_goodness_weigher_passing_host(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '100'
|
||||
}
|
||||
})
|
||||
host_state_2 = fakes.FakeHostState('host2', {
|
||||
'host': 'host2.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '0'
|
||||
}
|
||||
})
|
||||
host_state_3 = fakes.FakeHostState('host3', {
|
||||
'host': 'host3.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '100 / 2'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(100, weight)
|
||||
weight = weigher._weigh_object(host_state_2, weight_properties)
|
||||
self.assertEqual(0, weight)
|
||||
weight = weigher._weigh_object(host_state_3, weight_properties)
|
||||
self.assertEqual(50, weight)
|
||||
|
||||
def test_goodness_weigher_capabilities_substitution(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'foo': 50,
|
||||
'goodness_function': '10 + capabilities.foo'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(60, weight)
|
||||
|
||||
def test_goodness_weigher_extra_specs_substitution(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '10 + extra.foo'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'foo': 50
|
||||
}
|
||||
}
|
||||
}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(60, weight)
|
||||
|
||||
def test_goodness_weigher_volume_substitution(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '10 + volume.foo'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {
|
||||
'request_spec': {
|
||||
'volume_properties': {
|
||||
'foo': 50
|
||||
}
|
||||
}
|
||||
}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(60, weight)
|
||||
|
||||
def test_goodness_weigher_qos_substitution(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '10 + qos.foo'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {
|
||||
'qos_specs': {
|
||||
'foo': 50
|
||||
}
|
||||
}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(60, weight)
|
||||
|
||||
def test_goodness_weigher_stats_substitution(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': 'stats.free_capacity_gb > 20'
|
||||
},
|
||||
'free_capacity_gb': 50
|
||||
})
|
||||
|
||||
weight_properties = {}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(100, weight)
|
||||
|
||||
def test_goodness_weigher_invalid_substitution(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '10 + stats.my_val'
|
||||
},
|
||||
'foo': 50
|
||||
})
|
||||
|
||||
weight_properties = {}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(0, weight)
|
||||
|
||||
def test_goodness_weigher_host_rating_out_of_bounds(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '-10'
|
||||
}
|
||||
})
|
||||
host_state_2 = fakes.FakeHostState('host2', {
|
||||
'host': 'host2.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '200'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(0, weight)
|
||||
weight = weigher._weigh_object(host_state_2, weight_properties)
|
||||
self.assertEqual(0, weight)
|
||||
|
||||
def test_goodness_weigher_invalid_goodness_function(self):
|
||||
weigher = GoodnessWeigher()
|
||||
host_state = fakes.FakeHostState('host1', {
|
||||
'host': 'host.example.com',
|
||||
'capabilities': {
|
||||
'goodness_function': '50 / 0'
|
||||
}
|
||||
})
|
||||
|
||||
weight_properties = {}
|
||||
weight = weigher._weigh_object(host_state, weight_properties)
|
||||
self.assertEqual(0, weight)
|
||||
@ -317,3 +317,267 @@ class HostFiltersTestCase(test.TestCase):
|
||||
'same_host': "NOT-a-valid-UUID", }}
|
||||
|
||||
self.assertFalse(filt_cls.host_passes(host, filter_properties))
|
||||
|
||||
def test_driver_filter_passing_function(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': '1 == 1',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_failing_function(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': '1 == 2',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertFalse(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_no_filter_function(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': None,
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_not_implemented(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_no_volume_extra_specs(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': '1 == 1',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {'volume_type': {}}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_volume_backend_name_different(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': '1 == 1',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake2',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertFalse(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_function_extra_spec_replacement(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': 'extra.var == 1',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
'var': 1,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_function_stats_replacement(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'total_capacity_gb': 100,
|
||||
'capabilities': {
|
||||
'filter_function': 'stats.total_capacity_gb < 200',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_function_volume_replacement(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': 'volume.size < 5',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
},
|
||||
'request_spec': {
|
||||
'volume_properties': {
|
||||
'size': 1
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_function_qos_spec_replacement(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': 'qos.var == 1',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
},
|
||||
'qos_specs': {
|
||||
'var': 1
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_function_exception_caught(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': '1 / 0 == 0',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertFalse(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_function_empty_qos(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'filter_function': 'qos.maxiops == 1',
|
||||
}
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
},
|
||||
'qos_specs': None
|
||||
}
|
||||
|
||||
self.assertFalse(filt_cls.host_passes(host1, filter_properties))
|
||||
|
||||
def test_driver_filter_capabilities(self):
|
||||
filt_cls = self.class_map['DriverFilter']()
|
||||
host1 = fakes.FakeHostState(
|
||||
'host1', {
|
||||
'volume_backend_name': 'fake',
|
||||
'capabilities': {
|
||||
'foo': 10,
|
||||
'filter_function': 'capabilities.foo == 10',
|
||||
},
|
||||
})
|
||||
|
||||
filter_properties = {
|
||||
'volume_type': {
|
||||
'extra_specs': {
|
||||
'volume_backend_name': 'fake',
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
self.assertTrue(filt_cls.host_passes(host1, filter_properties))
|
||||
136
cinder/tests/test_evaluator.py
Normal file
136
cinder/tests/test_evaluator.py
Normal file
@ -0,0 +1,136 @@
|
||||
# Copyright (c) 2014 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 cinder import exception
|
||||
from cinder.scheduler.evaluator.evaluator import evaluate
|
||||
from cinder import test
|
||||
|
||||
|
||||
class EvaluatorTestCase(test.TestCase):
|
||||
def test_simple_integer(self):
|
||||
self.assertEqual(2, evaluate("1+1"))
|
||||
self.assertEqual(9, evaluate("2+3+4"))
|
||||
self.assertEqual(23, evaluate("11+12"))
|
||||
self.assertEqual(30, evaluate("5*6"))
|
||||
self.assertEqual(2, evaluate("22/11"))
|
||||
self.assertEqual(38, evaluate("109-71"))
|
||||
self.assertEqual(493, evaluate("872 - 453 + 44 / 22 * 4 + 66"))
|
||||
|
||||
def test_simple_float(self):
|
||||
self.assertEqual(2.0, evaluate("1.0 + 1.0"))
|
||||
self.assertEqual(2.5, evaluate("1.5 + 1.0"))
|
||||
self.assertEqual(3.0, evaluate("1.5 * 2.0"))
|
||||
|
||||
def test_int_float_mix(self):
|
||||
self.assertEqual(2.5, evaluate("1.5 + 1"))
|
||||
self.assertEqual(4.25, evaluate("8.5 / 2"))
|
||||
self.assertEqual(5.25, evaluate("10/4+0.75 + 2"))
|
||||
|
||||
def test_negative_numbers(self):
|
||||
self.assertEqual(-2, evaluate("-2"))
|
||||
self.assertEqual(-1, evaluate("-2+1"))
|
||||
self.assertEqual(3, evaluate("5+-2"))
|
||||
|
||||
def test_exponent(self):
|
||||
self.assertEqual(8, evaluate("2^3"))
|
||||
self.assertEqual(-8, evaluate("-2 ^ 3"))
|
||||
self.assertEqual(15.625, evaluate("2.5 ^ 3"))
|
||||
self.assertEqual(8, evaluate("4 ^ 1.5"))
|
||||
|
||||
def test_function(self):
|
||||
self.assertEqual(5, evaluate("abs(-5)"))
|
||||
self.assertEqual(2, evaluate("abs(2)"))
|
||||
self.assertEqual(1, evaluate("min(1, 100)"))
|
||||
self.assertEqual(100, evaluate("max(1, 100)"))
|
||||
|
||||
def test_parentheses(self):
|
||||
self.assertEqual(1, evaluate("(1)"))
|
||||
self.assertEqual(-1, evaluate("(-1)"))
|
||||
self.assertEqual(2, evaluate("(1+1)"))
|
||||
self.assertEqual(15, evaluate("(1+2) * 5"))
|
||||
self.assertEqual(3, evaluate("(1+2)*(3-1)/((1+(2-1)))"))
|
||||
self.assertEqual(-8.0, evaluate("((1.0 / 0.5) * (2)) *(-2)"))
|
||||
|
||||
def test_comparisons(self):
|
||||
self.assertEqual(True, evaluate("1 < 2"))
|
||||
self.assertEqual(True, evaluate("2 > 1"))
|
||||
self.assertEqual(True, evaluate("2 != 1"))
|
||||
self.assertEqual(False, evaluate("1 > 2"))
|
||||
self.assertEqual(False, evaluate("2 < 1"))
|
||||
self.assertEqual(False, evaluate("2 == 1"))
|
||||
self.assertEqual(True, evaluate("(1 == 1) == !(1 == 2)"))
|
||||
|
||||
def test_logic_ops(self):
|
||||
self.assertEqual(True, evaluate("(1 == 1) AND (2 == 2)"))
|
||||
self.assertEqual(True, evaluate("(1 == 1) and (2 == 2)"))
|
||||
self.assertEqual(True, evaluate("(1 == 1) && (2 == 2)"))
|
||||
self.assertEqual(False, evaluate("(1 == 1) && (5 == 2)"))
|
||||
|
||||
self.assertEqual(True, evaluate("(1 == 1) OR (5 == 2)"))
|
||||
self.assertEqual(True, evaluate("(1 == 1) or (5 == 2)"))
|
||||
self.assertEqual(True, evaluate("(1 == 1) || (5 == 2)"))
|
||||
self.assertEqual(False, evaluate("(5 == 1) || (5 == 2)"))
|
||||
|
||||
self.assertEqual(False, evaluate("(1 == 1) AND NOT (2 == 2)"))
|
||||
self.assertEqual(False, evaluate("(1 == 1) AND not (2 == 2)"))
|
||||
self.assertEqual(False, evaluate("(1 == 1) AND !(2 == 2)"))
|
||||
self.assertEqual(True, evaluate("(1 == 1) AND NOT (5 == 2)"))
|
||||
self.assertEqual(True,
|
||||
evaluate("(1 == 1) OR NOT (2 == 2) AND (5 == 5)"))
|
||||
|
||||
def test_ternary_conditional(self):
|
||||
self.assertEqual(5, evaluate("(1 < 2) ? 5 : 10"))
|
||||
self.assertEqual(10, evaluate("(1 > 2) ? 5 : 10"))
|
||||
|
||||
def test_variables_dict(self):
|
||||
stats = {'iops': 1000, 'usage': 0.65, 'count': 503, 'free_space': 407}
|
||||
request = {'iops': 500, 'size': 4}
|
||||
self.assertEqual(1500, evaluate("stats.iops + request.iops",
|
||||
stats=stats, request=request))
|
||||
|
||||
def test_missing_var(self):
|
||||
stats = {'iops': 1000, 'usage': 0.65, 'count': 503, 'free_space': 407}
|
||||
request = {'iops': 500, 'size': 4}
|
||||
self.assertRaises(exception.EvaluatorParseException,
|
||||
evaluate,
|
||||
"foo.bob + 5",
|
||||
stats=stats, request=request)
|
||||
self.assertRaises(exception.EvaluatorParseException,
|
||||
evaluate,
|
||||
"stats.bob + 5",
|
||||
stats=stats, request=request)
|
||||
self.assertRaises(exception.EvaluatorParseException,
|
||||
evaluate,
|
||||
"fake.var + 1",
|
||||
stats=stats, request=request, fake=None)
|
||||
|
||||
def test_bad_expression(self):
|
||||
self.assertRaises(exception.EvaluatorParseException,
|
||||
evaluate,
|
||||
"1/*1")
|
||||
|
||||
def test_nonnumber_comparison(self):
|
||||
nonnumber = {'test': 'foo'}
|
||||
request = {'test': 'bar'}
|
||||
self.assertRaises(
|
||||
exception.EvaluatorParseException,
|
||||
evaluate,
|
||||
"nonnumber.test != request.test",
|
||||
nonnumber=nonnumber, request=request)
|
||||
|
||||
def test_div_zero(self):
|
||||
self.assertRaises(exception.EvaluatorParseException,
|
||||
evaluate,
|
||||
"7 / 0")
|
||||
@ -26,6 +26,7 @@ paramiko>=1.13.0
|
||||
Paste
|
||||
PasteDeploy>=1.5.0
|
||||
pycrypto>=2.6
|
||||
pyparsing>=2.0.1
|
||||
python-barbicanclient>=2.1.0,!=3.0.0
|
||||
python-glanceclient>=0.15.0
|
||||
python-novaclient>=2.18.0
|
||||
|
||||
@ -31,6 +31,7 @@ cinder.scheduler.filters =
|
||||
CapabilitiesFilter = cinder.openstack.common.scheduler.filters.capabilities_filter:CapabilitiesFilter
|
||||
CapacityFilter = cinder.scheduler.filters.capacity_filter:CapacityFilter
|
||||
DifferentBackendFilter = cinder.scheduler.filters.affinity_filter:DifferentBackendFilter
|
||||
DriverFilter = cinder.scheduler.filters.driver_filter:DriverFilter
|
||||
JsonFilter = cinder.openstack.common.scheduler.filters.json_filter:JsonFilter
|
||||
RetryFilter = cinder.openstack.common.scheduler.filters.ignore_attempted_hosts_filter:IgnoreAttemptedHostsFilter
|
||||
SameBackendFilter = cinder.scheduler.filters.affinity_filter:SameBackendFilter
|
||||
@ -38,6 +39,7 @@ cinder.scheduler.weights =
|
||||
AllocatedCapacityWeigher = cinder.scheduler.weights.capacity:AllocatedCapacityWeigher
|
||||
CapacityWeigher = cinder.scheduler.weights.capacity:CapacityWeigher
|
||||
ChanceWeigher = cinder.scheduler.weights.chance:ChanceWeigher
|
||||
GoodnessWeigher = cinder.scheduler.weights.goodness:GoodnessWeigher
|
||||
VolumeNumberWeigher = cinder.scheduler.weights.volume_number:VolumeNumberWeigher
|
||||
console_scripts =
|
||||
cinder-all = cinder.cmd.all:main
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user