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# Copyright 2014: Mirantis Inc.
# 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.
"""
SLA (Service-level agreement) is set of details for determining compliance
with contracted values such as maximum error rate or minimum response time.
"""
from rally import consts
from rally.task import sla
@sla.configure(name="failure_rate")
class FailureRate(sla.SLA):
"""Failure rate minimum and maximum in percents."""
CONFIG_SCHEMA = {
"type": "object",
"$schema": consts.JSON_SCHEMA,
"properties": {
"min": {"type": "number", "minimum": 0.0, "maximum": 100.0},
"max": {"type": "number", "minimum": 0.0, "maximum": 100.0}
},
"minProperties": 1,
"additionalProperties": False,
}
def __init__(self, criterion_value):
super(FailureRate, self).__init__(criterion_value)
self.min_percent = self.criterion_value.get("min", 0)
self.max_percent = self.criterion_value.get("max", 100)
self.errors = 0
self.total = 0
self.error_rate = 0.0
def add_iteration(self, iteration):
self.total += 1
if iteration["error"]:
self.errors += 1
self.error_rate = self.errors * 100.0 / self.total
self.success = self.min_percent <= self.error_rate <= self.max_percent
return self.success
def merge(self, other):
self.total += other.total
self.errors += other.errors
if self.total:
self.error_rate = self.errors * 100.0 / self.total
self.success = self.min_percent <= self.error_rate <= self.max_percent
return self.success
def details(self):
return ("Failure rate criteria %.2f%% <= %.2f%% <= %.2f%% - %s" %
(self.min_percent, self.error_rate,
self.max_percent, self.status()))
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