Add DriverFilter and GoodnessWeigher to manila

This patch ports cinder's DriverFilter and GoodnessWeigher to manila.
These can use two new properties provided by backends,
'filter_function' and 'goodness_function', which can be used to filter
and weigh qualified backends, respectively.

Reference for cinder spec: I59b607a88953a346aa35e67e785a0417a7ce8cc9
Reference for cinder commit: I38408ab49b6ed869c1faae746ee64a3bae86be58

DocImpact
Change-Id: I873f4152e16efdeb30ceae26335a7974dc9b4b69
Implements: blueprint driver-filter-goodness-weigher
This commit is contained in:
tpsilva 2016-06-30 14:46:50 -03:00
parent 5b11b87dc7
commit f10776d832
20 changed files with 1223 additions and 1 deletions

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@ -782,3 +782,7 @@ class TegileAPIException(ShareBackendException):
class StorageCommunicationException(ShareBackendException):
message = _("Could not communicate with storage array.")
class EvaluatorParseException(ManilaException):
message = _("Error during evaluator parsing: %(reason)s")

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@ -0,0 +1,297 @@
# 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.
import operator
import re
import pyparsing
import six
from manila import exception
from manila.i18n import _
def _operatorOperands(tokenList):
it = iter(tokenList)
while 1:
try:
op1 = next(it)
op2 = next(it)
yield(op1, op2)
except StopIteration:
break
class EvalConstant(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
result = self.value
if (isinstance(result, six.string_types) and
re.match("^[a-zA-Z_]+\.[a-zA-Z_]+$", result)):
(which_dict, entry) = result.split('.')
try:
result = _vars[which_dict][entry]
except KeyError as e:
msg = _("KeyError: %s") % six.text_type(e)
raise exception.EvaluatorParseException(reason=msg)
except TypeError as e:
msg = _("TypeError: %s") % six.text_type(e)
raise exception.EvaluatorParseException(reason=msg)
try:
result = int(result)
except ValueError:
try:
result = float(result)
except ValueError as e:
msg = _("ValueError: %s") % six.text_type(e)
raise exception.EvaluatorParseException(reason=msg)
return result
class EvalSignOp(object):
operations = {
'+': 1,
'-': -1,
}
def __init__(self, toks):
self.sign, self.value = toks[0]
def eval(self):
return self.operations[self.sign] * self.value.eval()
class EvalAddOp(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
sum = self.value[0].eval()
for op, val in _operatorOperands(self.value[1:]):
if op == '+':
sum += val.eval()
elif op == '-':
sum -= val.eval()
return sum
class EvalMultOp(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
prod = self.value[0].eval()
for op, val in _operatorOperands(self.value[1:]):
try:
if op == '*':
prod *= val.eval()
elif op == '/':
prod /= float(val.eval())
except ZeroDivisionError as e:
msg = _("ZeroDivisionError: %s") % six.text_type(e)
raise exception.EvaluatorParseException(reason=msg)
return prod
class EvalPowerOp(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
prod = self.value[0].eval()
for op, val in _operatorOperands(self.value[1:]):
prod = pow(prod, val.eval())
return prod
class EvalNegateOp(object):
def __init__(self, toks):
self.negation, self.value = toks[0]
def eval(self):
return not self.value.eval()
class EvalComparisonOp(object):
operations = {
"<": operator.lt,
"<=": operator.le,
">": operator.gt,
">=": operator.ge,
"!=": operator.ne,
"==": operator.eq,
"<>": operator.ne,
}
def __init__(self, toks):
self.value = toks[0]
def eval(self):
val1 = self.value[0].eval()
for op, val in _operatorOperands(self.value[1:]):
fn = self.operations[op]
val2 = val.eval()
if not fn(val1, val2):
break
val1 = val2
else:
return True
return False
class EvalTernaryOp(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
condition = self.value[0].eval()
if condition:
return self.value[2].eval()
else:
return self.value[4].eval()
class EvalFunction(object):
functions = {
"abs": abs,
"max": max,
"min": min,
}
def __init__(self, toks):
self.func, self.value = toks[0]
def eval(self):
args = self.value.eval()
if type(args) is list:
return self.functions[self.func](*args)
else:
return self.functions[self.func](args)
class EvalCommaSeperator(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
val1 = self.value[0].eval()
val2 = self.value[2].eval()
if type(val2) is list:
val_list = []
val_list.append(val1)
for val in val2:
val_list.append(val)
return val_list
return [val1, val2]
class EvalBoolAndOp(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
left = self.value[0].eval()
right = self.value[2].eval()
return left and right
class EvalBoolOrOp(object):
def __init__(self, toks):
self.value = toks[0]
def eval(self):
left = self.value[0].eval()
right = self.value[2].eval()
return left or right
_parser = None
_vars = {}
def _def_parser():
# Enabling packrat parsing greatly speeds up the parsing.
pyparsing.ParserElement.enablePackrat()
alphas = pyparsing.alphas
Combine = pyparsing.Combine
Forward = pyparsing.Forward
nums = pyparsing.nums
oneOf = pyparsing.oneOf
opAssoc = pyparsing.opAssoc
operatorPrecedence = pyparsing.operatorPrecedence
Word = pyparsing.Word
integer = Word(nums)
real = Combine(Word(nums) + '.' + Word(nums))
variable = Word(alphas + '_' + '.')
number = real | integer
expr = Forward()
fn = Word(alphas + '_' + '.')
operand = number | variable | fn
signop = oneOf('+ -')
addop = oneOf('+ -')
multop = oneOf('* /')
comparisonop = oneOf(' '.join(EvalComparisonOp.operations.keys()))
ternaryop = ('?', ':')
boolandop = oneOf('AND and &&')
boolorop = oneOf('OR or ||')
negateop = oneOf('NOT not !')
operand.setParseAction(EvalConstant)
expr = operatorPrecedence(operand, [
(fn, 1, opAssoc.RIGHT, EvalFunction),
("^", 2, opAssoc.RIGHT, EvalPowerOp),
(signop, 1, opAssoc.RIGHT, EvalSignOp),
(multop, 2, opAssoc.LEFT, EvalMultOp),
(addop, 2, opAssoc.LEFT, EvalAddOp),
(negateop, 1, opAssoc.RIGHT, EvalNegateOp),
(comparisonop, 2, opAssoc.LEFT, EvalComparisonOp),
(ternaryop, 3, opAssoc.LEFT, EvalTernaryOp),
(boolandop, 2, opAssoc.LEFT, EvalBoolAndOp),
(boolorop, 2, opAssoc.LEFT, EvalBoolOrOp),
(',', 2, opAssoc.RIGHT, EvalCommaSeperator), ])
return expr
def evaluate(expression, **kwargs):
"""Evaluates an expression.
Provides the facility to evaluate mathematical expressions, and to
substitute variables from dictionaries into those expressions.
Supports both integer and floating point values, and automatic
promotion where necessary.
"""
global _parser
if _parser is None:
_parser = _def_parser()
global _vars
_vars = kwargs
try:
result = _parser.parseString(expression, parseAll=True)[0]
except pyparsing.ParseException as e:
msg = _("ParseException: %s") % six.text_type(e)
raise exception.EvaluatorParseException(reason=msg)
return result.eval()

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@ -0,0 +1,123 @@
# 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.
import six
from oslo_log import log as logging
from manila.i18n import _LI
from manila.i18n import _LW
from manila.scheduler.evaluator import evaluator
from manila.scheduler.filters import base_host
from manila.scheduler import utils
LOG = logging.getLogger(__name__)
class DriverFilter(base_host.BaseHostFilter):
"""DriverFilter filters hosts based on a 'filter function' and metrics.
DriverFilter filters based on share host's provided 'filter function'
and metrics.
"""
def host_passes(self, host_state, filter_properties):
"""Determines whether a host has a passing filter_function or not."""
stats = self._generate_stats(host_state, filter_properties)
LOG.debug("Driver Filter: Checking host '%s'",
stats['host_stats']['host'])
result = self._check_filter_function(stats)
LOG.debug("Result: %s", result)
LOG.debug("Done checking host '%s'", stats['host_stats']['host'])
return result
def _check_filter_function(self, stats):
"""Checks if a share passes a host's filter function.
Returns a tuple in the format (filter_passing, filter_invalid).
Both values are booleans.
"""
host_stats = stats['host_stats']
extra_specs = stats['extra_specs']
# Check that the share types match
if extra_specs is None or 'share_backend_name' not in extra_specs:
LOG.warning(_LW("No 'share_backend_name' key in extra_specs. "
"Skipping share backend name check."))
elif (extra_specs['share_backend_name'] !=
host_stats['share_backend_name']):
LOG.warning(_LW("Share backend names do not match: '%(target)s' "
"vs '%(current)s' :: Skipping."),
{'target': extra_specs['share_backend_name'],
'current': host_stats['share_backend_name']})
return False
if stats['filter_function'] is None:
LOG.warning(_LW("Filter function not set :: passing host."))
return True
try:
filter_result = self._run_evaluator(stats['filter_function'],
stats)
except Exception as ex:
# Warn the admin for now that there is an error in the
# filter function.
LOG.warning(_LW("Error in filtering function "
"'%(function)s' : '%(error)s' :: failing host."),
{'function': stats['filter_function'],
'error': ex, })
return False
msg = _LI("Filter function result for host %(host)s: %(result)s.")
args = {'host': stats['host_stats']['host'],
'result': six.text_type(filter_result)}
LOG.info(msg, args)
return filter_result
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']
share_stats = stats['share_stats']
result = evaluator.evaluate(
func,
extra=extra_specs,
stats=host_stats,
capabilities=host_caps,
share=share_stats)
return result
def _generate_stats(self, host_state, filter_properties):
"""Generates statistics from host and share data."""
filter_function = None
if ('filter_function' in host_state.capabilities and
host_state.capabilities['filter_function'] is not None):
filter_function = six.text_type(
host_state.capabilities['filter_function'])
stats = utils.generate_stats(host_state, filter_properties)
stats['filter_function'] = filter_function
return stats

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@ -46,13 +46,15 @@ host_manager_opts = [
'CapacityFilter',
'CapabilitiesFilter',
'ConsistencyGroupFilter',
'DriverFilter',
'ShareReplicationFilter',
],
help='Which filter class names to use for filtering hosts '
'when not specified in the request.'),
cfg.ListOpt('scheduler_default_weighers',
default=[
'CapacityWeigher'
'CapacityWeigher',
'GoodnessWeigher',
],
help='Which weigher class names to use for weighing hosts.')
]

63
manila/scheduler/utils.py Normal file
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@ -0,0 +1,63 @@
# 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.
def generate_stats(host_state, properties):
"""Generates statistics from host and share data."""
host_stats = {
'host': host_state.host,
'share_backend_name': host_state.share_backend_name,
'vendor_name': host_state.vendor_name,
'driver_version': host_state.driver_version,
'storage_protocol': host_state.storage_protocol,
'qos': host_state.qos,
'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,
'driver_handles_share_servers':
host_state.driver_handles_share_servers,
'thin_provisioning': host_state.thin_provisioning,
'updated': host_state.updated,
'consistency_group_support': host_state.consistency_group_support,
'dedupe': host_state.dedupe,
'compression': host_state.compression,
'snapshot_support': host_state.snapshot_support,
'replication_domain': host_state.replication_domain,
'replication_type': host_state.replication_type,
'provisioned_capacity_gb': host_state.provisioned_capacity_gb,
'pools': host_state.pools,
'max_over_subscription_ratio':
host_state.max_over_subscription_ratio,
}
host_caps = host_state.capabilities
share_type = properties.get('share_type', {})
extra_specs = share_type.get('extra_specs', {})
request_spec = properties.get('request_spec', {})
share_stats = request_spec.get('resource_properties', {})
stats = {
'host_stats': host_stats,
'host_caps': host_caps,
'extra_specs': extra_specs,
'share_stats': share_stats,
'share_type': share_type,
}
return stats

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@ -0,0 +1,125 @@
# 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 oslo_log import log as logging
import six
from manila.i18n import _LI
from manila.i18n import _LW
from manila.scheduler.evaluator import evaluator
from manila.scheduler import utils
from manila.scheduler.weighers import base_host
LOG = logging.getLogger(__name__)
class GoodnessWeigher(base_host.BaseHostWeigher):
"""Goodness Weigher. Assign weights based on a host's goodness function.
Goodness rating is the following:
.. code-block:: none
0 -- host is a poor choice
.
.
50 -- host is a good choice
.
.
100 -- host is a perfect choice
"""
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
msg = _LI("Goodness function result for host %(host)s: %(result)s.")
args = {'host': stats['host_stats']['host'],
'result': six.text_type(goodness_rating)}
LOG.info(msg, args)
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']
share_stats = stats['share_stats']
result = evaluator.evaluate(
func,
extra=extra_specs,
stats=host_stats,
capabilities=host_caps,
share=share_stats)
return result
def _generate_stats(self, host_state, weight_properties):
"""Generates statistics from host and share data."""
goodness_function = None
if ('goodness_function' in host_state.capabilities and
host_state.capabilities['goodness_function'] is not None):
goodness_function = six.text_type(
host_state.capabilities['goodness_function'])
stats = utils.generate_stats(host_state, weight_properties)
stats['goodness_function'] = goodness_function
return stats

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@ -112,6 +112,14 @@ share_opts = [
"replication between each other. If this option is not "
"specified in the group, it means that replication is not "
"enabled on the backend."),
cfg.StrOpt('filter_function',
default=None,
help='String representation for an equation that will be '
'used to filter hosts.'),
cfg.StrOpt('goodness_function',
default=None,
help='String representation for an equation that will be '
'used to determine the goodness of a host.'),
]
ssh_opts = [
@ -808,6 +816,8 @@ class ShareDriver(object):
pools=self.pools or None,
snapshot_support=self.snapshots_are_supported,
replication_domain=self.replication_domain,
filter_function=self.get_filter_function(),
goodness_function=self.get_goodness_function(),
)
if isinstance(data, dict):
common.update(data)
@ -1841,3 +1851,57 @@ class ShareDriver(object):
backend and their status was 'deleting'.
"""
raise NotImplementedError()
def get_filter_function(self):
"""Get filter_function string.
Returns either the string from the driver instance or global section
in manila.conf. If nothing is specified in manila.conf, then try to
find the default filter_function. When None is returned the scheduler
will always pass the driver instance.
:return a filter_function string or None
"""
ret_function = self.configuration.filter_function
if not ret_function:
ret_function = CONF.filter_function
if not ret_function:
ret_function = self.get_default_filter_function()
return ret_function
def get_goodness_function(self):
"""Get good_function string.
Returns either the string from the driver instance or global section
in manila.conf. If nothing is specified in manila.conf, then try to
find the default goodness_function. When None is returned the scheduler
will give the lowest score to the driver instance.
:return a goodness_function string or None
"""
ret_function = self.configuration.goodness_function
if not ret_function:
ret_function = CONF.goodness_function
if not ret_function:
ret_function = self.get_default_goodness_function()
return ret_function
def get_default_filter_function(self):
"""Get the default filter_function string.
Each driver could overwrite the method to return a well-known
default string if it is available.
:return: None
"""
return None
def get_default_goodness_function(self):
"""Get the default goodness_function string.
Each driver could overwrite the method to return a well-known
default string if it is available.
:return: None
"""
return None

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@ -0,0 +1,140 @@
# 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 manila import exception
from manila.scheduler.evaluator import evaluator
from manila import test
class EvaluatorTestCase(test.TestCase):
def test_simple_integer(self):
self.assertEqual(2, evaluator.evaluate("1+1"))
self.assertEqual(9, evaluator.evaluate("2+3+4"))
self.assertEqual(23, evaluator.evaluate("11+12"))
self.assertEqual(30, evaluator.evaluate("5*6"))
self.assertEqual(2, evaluator.evaluate("22/11"))
self.assertEqual(38, evaluator.evaluate("109-71"))
self.assertEqual(
493, evaluator.evaluate("872 - 453 + 44 / 22 * 4 + 66"))
def test_simple_float(self):
self.assertEqual(2.0, evaluator.evaluate("1.0 + 1.0"))
self.assertEqual(2.5, evaluator.evaluate("1.5 + 1.0"))
self.assertEqual(3.0, evaluator.evaluate("1.5 * 2.0"))
def test_int_float_mix(self):
self.assertEqual(2.5, evaluator.evaluate("1.5 + 1"))
self.assertEqual(4.25, evaluator.evaluate("8.5 / 2"))
self.assertEqual(5.25, evaluator.evaluate("10/4+0.75 + 2"))
def test_negative_numbers(self):
self.assertEqual(-2, evaluator.evaluate("-2"))
self.assertEqual(-1, evaluator.evaluate("-2+1"))
self.assertEqual(3, evaluator.evaluate("5+-2"))
def test_exponent(self):
self.assertEqual(8, evaluator.evaluate("2^3"))
self.assertEqual(-8, evaluator.evaluate("-2 ^ 3"))
self.assertEqual(15.625, evaluator.evaluate("2.5 ^ 3"))
self.assertEqual(8, evaluator.evaluate("4 ^ 1.5"))
def test_function(self):
self.assertEqual(5, evaluator.evaluate("abs(-5)"))
self.assertEqual(2, evaluator.evaluate("abs(2)"))
self.assertEqual(1, evaluator.evaluate("min(1, 100)"))
self.assertEqual(100, evaluator.evaluate("max(1, 100)"))
self.assertEqual(100, evaluator.evaluate("max(1, 2, 100)"))
def test_parentheses(self):
self.assertEqual(1, evaluator.evaluate("(1)"))
self.assertEqual(-1, evaluator.evaluate("(-1)"))
self.assertEqual(2, evaluator.evaluate("(1+1)"))
self.assertEqual(15, evaluator.evaluate("(1+2) * 5"))
self.assertEqual(3, evaluator.evaluate("(1+2)*(3-1)/((1+(2-1)))"))
self.assertEqual(
-8.0, evaluator. evaluate("((1.0 / 0.5) * (2)) *(-2)"))
def test_comparisons(self):
self.assertTrue(evaluator.evaluate("1 < 2"))
self.assertTrue(evaluator.evaluate("2 > 1"))
self.assertTrue(evaluator.evaluate("2 != 1"))
self.assertFalse(evaluator.evaluate("1 > 2"))
self.assertFalse(evaluator.evaluate("2 < 1"))
self.assertFalse(evaluator.evaluate("2 == 1"))
self.assertTrue(evaluator.evaluate("(1 == 1) == !(1 == 2)"))
def test_logic_ops(self):
self.assertTrue(evaluator.evaluate("(1 == 1) AND (2 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) and (2 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) && (2 == 2)"))
self.assertFalse(evaluator.evaluate("(1 == 1) && (5 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) OR (5 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) or (5 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) || (5 == 2)"))
self.assertFalse(evaluator.evaluate("(5 == 1) || (5 == 2)"))
self.assertFalse(evaluator.evaluate("(1 == 1) AND NOT (2 == 2)"))
self.assertFalse(evaluator.evaluate("(1 == 1) AND not (2 == 2)"))
self.assertFalse(evaluator.evaluate("(1 == 1) AND !(2 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) AND NOT (5 == 2)"))
self.assertTrue(evaluator.evaluate("(1 == 1) OR NOT (2 == 2) "
"AND (5 == 5)"))
def test_ternary_conditional(self):
self.assertEqual(5, evaluator.evaluate("(1 < 2) ? 5 : 10"))
self.assertEqual(10, evaluator.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, evaluator.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,
evaluator.evaluate,
"foo.bob + 5",
stats=stats, request=request)
self.assertRaises(exception.EvaluatorParseException,
evaluator.evaluate,
"stats.bob + 5",
stats=stats, request=request)
self.assertRaises(exception.EvaluatorParseException,
evaluator.evaluate,
"fake.var + 1",
stats=stats, request=request, fake=None)
def test_bad_expression(self):
self.assertRaises(exception.EvaluatorParseException,
evaluator.evaluate,
"1/*1")
def test_nonnumber_comparison(self):
nonnumber = {'test': 'foo'}
request = {'test': 'bar'}
self.assertRaises(
exception.EvaluatorParseException,
evaluator.evaluate,
"nonnumber.test != request.test",
nonnumber=nonnumber, request=request)
def test_div_zero(self):
self.assertRaises(exception.EvaluatorParseException,
evaluator.evaluate,
"7 / 0")

View File

@ -0,0 +1,191 @@
# 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 oslo_context import context
from manila.scheduler.filters import driver
from manila import test
from manila.tests.scheduler import fakes
class HostFiltersTestCase(test.TestCase):
def setUp(self):
super(HostFiltersTestCase, self).setUp()
self.context = context.RequestContext('fake', 'fake')
self.filter = driver.DriverFilter()
def test_passing_function(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': '1 == 1',
}
})
filter_properties = {'share_type': {}}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_failing_function(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': '1 == 2',
}
})
filter_properties = {'share_type': {}}
self.assertFalse(self.filter.host_passes(host1, filter_properties))
def test_no_filter_function(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': None,
}
})
filter_properties = {'share_type': {}}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_not_implemented(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {}
})
filter_properties = {'share_type': {}}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_no_share_extra_specs(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': '1 == 1',
}
})
filter_properties = {'share_type': {}}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_extra_specs_wrong_backend(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': '1 == 1',
}
})
filter_properties = {
'share_type': {
'extra_specs': {
'share_backend_name': 'foo',
}
}
}
self.assertFalse(self.filter.host_passes(host1, filter_properties))
def test_function_extra_spec_replacement(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': 'extra.var == 1',
}
})
filter_properties = {
'share_type': {
'extra_specs': {
'var': 1,
}
}
}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_function_stats_replacement(self):
host1 = fakes.FakeHostState(
'host1', {
'total_capacity_gb': 100,
'capabilities': {
'filter_function': 'stats.total_capacity_gb < 200',
}
})
filter_properties = {'share_type': {}}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_function_share_replacement(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': 'share.size < 5',
}
})
filter_properties = {
'request_spec': {
'resource_properties': {
'size': 1
}
}
}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_function_exception_caught(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'filter_function': '1 / 0 == 0',
}
})
filter_properties = {}
self.assertFalse(self.filter.host_passes(host1, filter_properties))
def test_capabilities(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'foo': 10,
'filter_function': 'capabilities.foo == 10',
},
})
filter_properties = {}
self.assertTrue(self.filter.host_passes(host1, filter_properties))
def test_wrong_capabilities(self):
host1 = fakes.FakeHostState(
'host1', {
'capabilities': {
'bar': 10,
'filter_function': 'capabilities.foo == 10',
},
})
filter_properties = {}
self.assertFalse(self.filter.host_passes(host1, filter_properties))

View File

@ -0,0 +1,180 @@
# 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.
"""
Tests For Goodness Weigher.
"""
from manila.scheduler.weighers import goodness
from manila import test
from manila.tests.scheduler import fakes
class GoodnessWeigherTestCase(test.TestCase):
def test_goodness_weigher_with_no_goodness_function(self):
weigher = goodness.GoodnessWeigher()
host_state = fakes.FakeHostState('host1', {
'host': 'host.example.com',
'capabilities': {
'foo': '50'
}
})
weight_properties = {}
weight = weigher._weigh_object(host_state, weight_properties)
self.assertEqual(0, weight)
def test_goodness_weigher_passing_host(self):
weigher = goodness.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 = goodness.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 = goodness.GoodnessWeigher()
host_state = fakes.FakeHostState('host1', {
'host': 'host.example.com',
'capabilities': {
'goodness_function': '10 + extra.foo'
}
})
weight_properties = {
'share_type': {
'extra_specs': {
'foo': 50
}
}
}
weight = weigher._weigh_object(host_state, weight_properties)
self.assertEqual(60, weight)
def test_goodness_weigher_share_substitution(self):
weigher = goodness.GoodnessWeigher()
host_state = fakes.FakeHostState('host1', {
'host': 'host.example.com',
'capabilities': {
'goodness_function': '10 + share.foo'
}
})
weight_properties = {
'request_spec': {
'resource_properties': {
'foo': 50
}
}
}
weight = weigher._weigh_object(host_state, weight_properties)
self.assertEqual(60, weight)
def test_goodness_weigher_stats_substitution(self):
weigher = goodness.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 = goodness.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 = goodness.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 = goodness.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)

View File

@ -125,6 +125,8 @@ class EMCShareFrameworkTestCase(test.TestCase):
data['pools'] = None
data['snapshot_support'] = True
data['replication_domain'] = None
data['filter_function'] = None
data['goodness_function'] = None
self.assertEqual(data, self.driver._stats)
def _fake_safe_get(self, value):

View File

@ -257,6 +257,8 @@ class GlusterfsNativeShareDriverTestCase(test.TestCase):
'pools': None,
'snapshot_support': True,
'replication_domain': None,
'filter_function': None,
'goodness_function': None,
}
self.assertEqual(test_data, self._driver._stats)

View File

@ -58,6 +58,8 @@ class HPE3ParDriverTestCase(test.TestCase):
self.conf.network_config_group = 'test_network_config_group'
self.conf.admin_network_config_group = (
'test_admin_network_config_group')
self.conf.filter_function = None
self.conf.goodness_function = None
def safe_get(attr):
try:
@ -560,6 +562,8 @@ class HPE3ParDriverTestCase(test.TestCase):
'vendor_name': 'HPE',
'pools': None,
'replication_domain': None,
'filter_function': None,
'goodness_function': None,
}
result = self.driver.get_share_stats(refresh=True)
@ -618,6 +622,8 @@ class HPE3ParDriverTestCase(test.TestCase):
'hp3par_flash_cache': False,
'snapshot_support': True,
'replication_domain': None,
'filter_function': None,
'goodness_function': None,
}
result = self.driver.get_share_stats(refresh=True)
@ -652,6 +658,8 @@ class HPE3ParDriverTestCase(test.TestCase):
'vendor_name': 'HPE',
'snapshot_support': True,
'replication_domain': None,
'filter_function': None,
'goodness_function': None,
}
result = self.driver.get_share_stats(refresh=True)

View File

@ -746,6 +746,8 @@ class HuaweiShareDriverTestCase(test.TestCase):
self.configuration.max_over_subscription_ratio = 1
self.configuration.driver_handles_share_servers = False
self.configuration.replication_domain = None
self.configuration.filter_function = None
self.configuration.goodness_function = None
self.tmp_dir = tempfile.mkdtemp()
self.fake_conf_file = self.tmp_dir + '/manila_huawei_conf.xml'
@ -2189,6 +2191,8 @@ class HuaweiShareDriverTestCase(test.TestCase):
expected['qos'] = True
expected["snapshot_support"] = True
expected['replication_domain'] = None
expected['filter_function'] = None
expected['goodness_function'] = None
expected["pools"] = []
pool = dict(
pool_name='OpenStack_Pool',

View File

@ -59,6 +59,8 @@ class FakeConfig(object):
"reserved_share_percentage", 0)
self.max_over_subscription_ratio = kwargs.get(
"max_over_subscription_ratio", 15.0)
self.filter_function = kwargs.get("filter_function", None)
self.goodness_function = kwargs.get("goodness_function", None)
def safe_get(self, key):
return getattr(self, key)
@ -303,6 +305,8 @@ class ZFSonLinuxShareDriverTestCase(test.TestCase):
'storage_protocol': 'NFS',
'total_capacity_gb': 'unknown',
'vendor_name': 'Open Source',
'filter_function': None,
'goodness_function': None,
}
if replication_domain:
expected['replication_type'] = 'readable'

View File

@ -0,0 +1,10 @@
---
features:
- Add DriverFilter and GoodnessWeigher to manila's scheduler.
These can use two new properties provided by backends, 'filter_function'
and 'goodness_function', which can be used to filter and weigh qualified
backends, respectively.
upgrade:
- To add DriverFilter and GoodnessWeigher to an active deployment, their
references must be added to the filters and weighers sections on
entry_points.txt.

View File

@ -27,6 +27,7 @@ oslo.concurrency>=3.8.0 # Apache-2.0
paramiko>=2.0 # LGPLv2.1+
Paste # MIT
PasteDeploy>=1.5.0 # MIT
pyparsing>=2.0.1 # MIT
python-neutronclient>=4.2.0 # Apache-2.0
keystoneauth1>=2.7.0 # Apache-2.0
keystonemiddleware!=4.1.0,!=4.5.0,>=4.0.0 # Apache-2.0

View File

@ -38,12 +38,14 @@ manila.scheduler.filters =
CapabilitiesFilter = manila.scheduler.filters.capabilities:CapabilitiesFilter
CapacityFilter = manila.scheduler.filters.capacity:CapacityFilter
ConsistencyGroupFilter = manila.scheduler.filters.consistency_group:ConsistencyGroupFilter
DriverFilter = manila.scheduler.filters.driver:DriverFilter
IgnoreAttemptedHostsFilter = manila.scheduler.filters.ignore_attempted_hosts:IgnoreAttemptedHostsFilter
JsonFilter = manila.scheduler.filters.json:JsonFilter
RetryFilter = manila.scheduler.filters.retry:RetryFilter
ShareReplicationFilter = manila.scheduler.filters.share_replication:ShareReplicationFilter
manila.scheduler.weighers =
CapacityWeigher = manila.scheduler.weighers.capacity:CapacityWeigher
GoodnessWeigher = manila.scheduler.weighers.goodness:GoodnessWeigher
PoolWeigher = manila.scheduler.weighers.pool:PoolWeigher
# These are for backwards compat with Havana notification_driver configuration values
oslo_messaging.notify.drivers =