-
Notifications
You must be signed in to change notification settings - Fork 490
/
storage.py
196 lines (140 loc) · 5.31 KB
/
storage.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
"""Copyright 2009 Chris Davis
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 os
import re
import whisper
from os.path import join, exists, sep
from carbon.conf import OrderedConfigParser, settings
from carbon.util import pickle
from carbon import log
from carbon.exceptions import CarbonConfigException
STORAGE_SCHEMAS_CONFIG = join(settings.CONF_DIR, 'storage-schemas.conf')
STORAGE_AGGREGATION_CONFIG = join(settings.CONF_DIR, 'storage-aggregation.conf')
STORAGE_LISTS_DIR = join(settings.CONF_DIR, 'lists')
def getFilesystemPath(metric):
metric_path = metric.replace('.', sep).lstrip(sep) + '.wsp'
return join(settings.LOCAL_DATA_DIR, metric_path)
class Schema:
def test(self, metric):
raise NotImplementedError()
def matches(self, metric):
return bool(self.test(metric))
class DefaultSchema(Schema):
def __init__(self, name, archives):
self.name = name
self.archives = archives
def test(self, metric):
return True
class PatternSchema(Schema):
def __init__(self, name, pattern, archives):
self.name = name
self.pattern = pattern
self.regex = re.compile(pattern)
self.archives = archives
def test(self, metric):
return self.regex.search(metric)
class ListSchema(Schema):
def __init__(self, name, listName, archives):
self.name = name
self.listName = listName
self.archives = archives
self.path = join(settings.WHITELISTS_DIR, listName)
if exists(self.path):
self.mtime = os.stat(self.path).st_mtime
fh = open(self.path, 'rb')
self.members = pickle.load(fh)
fh.close()
else:
self.mtime = 0
self.members = frozenset()
def test(self, metric):
if exists(self.path):
current_mtime = os.stat(self.path).st_mtime
if current_mtime > self.mtime:
self.mtime = current_mtime
fh = open(self.path, 'rb')
self.members = pickle.load(fh)
fh.close()
return metric in self.members
class Archive:
def __init__(self, secondsPerPoint, points):
self.secondsPerPoint = int(secondsPerPoint)
self.points = int(points)
def __str__(self):
return "Archive = (Seconds per point: %d, Datapoints to save: %d)" % (self.secondsPerPoint, self.points)
def getTuple(self):
return (self.secondsPerPoint, self.points)
@staticmethod
def fromString(retentionDef):
(secondsPerPoint, points) = whisper.parseRetentionDef(retentionDef)
return Archive(secondsPerPoint, points)
def loadStorageSchemas():
schemaList = []
config = OrderedConfigParser()
config.read(STORAGE_SCHEMAS_CONFIG)
for section in config.sections():
options = dict(config.items(section))
matchAll = options.get('match-all')
pattern = options.get('pattern')
listName = options.get('list')
retentions = options['retentions'].split(',')
archives = [Archive.fromString(s) for s in retentions]
if matchAll:
mySchema = DefaultSchema(section, archives)
elif pattern:
mySchema = PatternSchema(section, pattern, archives)
elif listName:
mySchema = ListSchema(section, listName, archives)
archiveList = [a.getTuple() for a in archives]
try:
whisper.validateArchiveList(archiveList)
schemaList.append(mySchema)
except whisper.InvalidConfiguration, e:
log.msg("Invalid schemas found in %s: %s" % (section, e))
schemaList.append(defaultSchema)
return schemaList
def loadAggregationSchemas():
# NOTE: This abuses the Schema classes above, and should probably be refactored.
schemaList = []
config = OrderedConfigParser()
try:
config.read(STORAGE_AGGREGATION_CONFIG)
except (IOError, CarbonConfigException):
log.msg("%s not found, ignoring." % STORAGE_AGGREGATION_CONFIG)
for section in config.sections():
options = dict(config.items(section))
matchAll = options.get('match-all')
pattern = options.get('pattern')
listName = options.get('list')
xFilesFactor = options.get('xfilesfactor')
aggregationMethod = options.get('aggregationmethod')
try:
if xFilesFactor is not None:
xFilesFactor = float(xFilesFactor)
assert 0 <= xFilesFactor <= 1
if aggregationMethod is not None:
assert aggregationMethod in whisper.aggregationMethods
except:
log.msg("Invalid schemas found in %s." % section)
continue
archives = (xFilesFactor, aggregationMethod)
if matchAll:
mySchema = DefaultSchema(section, archives)
elif pattern:
mySchema = PatternSchema(section, pattern, archives)
elif listName:
mySchema = ListSchema(section, listName, archives)
schemaList.append(mySchema)
schemaList.append(defaultAggregation)
return schemaList
defaultArchive = Archive(60, 60 * 24 * 7) # default retention for unclassified data (7 days of minutely data)
defaultSchema = DefaultSchema('default', [defaultArchive])
defaultAggregation = DefaultSchema('default', (None, None))