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
|
# -*- coding: utf-8 -*-
# Description: memcached netdata python.d module
# Author: Pawel Krupa (paulfantom)
from base import SocketService
# default module values (can be overridden per job in `config`)
#update_every = 2
priority = 60000
retries = 60
# default job configuration (overridden by python.d.plugin)
# config = {'local': {
# 'update_every': update_every,
# 'retries': retries,
# 'priority': priority,
# 'host': 'localhost',
# 'port': 11211,
# 'unix_socket': None
# }}
ORDER = ['cache', 'net', 'connections', 'items', 'evicted_reclaimed',
'get', 'get_rate', 'set_rate', 'cas', 'delete', 'increment', 'decrement', 'touch', 'touch_rate']
CHARTS = {
'cache': {
'options': [None, 'Cache Size', 'megabytes', 'cache', 'memcached.cache', 'stacked'],
'lines': [
['avail', 'available', 'absolute', 1, 1048576],
['used', 'used', 'absolute', 1, 1048576]
]},
'net': {
'options': [None, 'Network', 'kilobits/s', 'network', 'memcached.net', 'area'],
'lines': [
['bytes_read', 'in', 'incremental', 8, 1024],
['bytes_written', 'out', 'incremental', -8, 1024]
]},
'connections': {
'options': [None, 'Connections', 'connections/s', 'connections', 'memcached.connections', 'line'],
'lines': [
['curr_connections', 'current', 'incremental'],
['rejected_connections', 'rejected', 'incremental'],
['total_connections', 'total', 'incremental']
]},
'items': {
'options': [None, 'Items', 'items', 'items', 'memcached.items', 'line'],
'lines': [
['curr_items', 'current', 'absolute'],
['total_items', 'total', 'absolute']
]},
'evicted_reclaimed': {
'options': [None, 'Items', 'items', 'items', 'memcached.evicted_reclaimed', 'line'],
'lines': [
['reclaimed', 'reclaimed', 'absolute'],
['evictions', 'evicted', 'absolute']
]},
'get': {
'options': [None, 'Requests', 'requests', 'get ops', 'memcached.get', 'stacked'],
'lines': [
['get_hits', 'hits', 'percent-of-absolute-row'],
['get_misses', 'misses', 'percent-of-absolute-row']
]},
'get_rate': {
'options': [None, 'Rate', 'requests/s', 'get ops', 'memcached.get_rate', 'line'],
'lines': [
['cmd_get', 'rate', 'incremental']
]},
'set_rate': {
'options': [None, 'Rate', 'requests/s', 'set ops', 'memcached.set_rate', 'line'],
'lines': [
['cmd_set', 'rate', 'incremental']
]},
'delete': {
'options': [None, 'Requests', 'requests', 'delete ops', 'memcached.delete', 'stacked'],
'lines': [
['delete_hits', 'hits', 'percent-of-absolute-row'],
['delete_misses', 'misses', 'percent-of-absolute-row'],
]},
'cas': {
'options': [None, 'Requests', 'requests', 'check and set ops', 'memcached.cas', 'stacked'],
'lines': [
['cas_hits', 'hits', 'percent-of-absolute-row'],
['cas_misses', 'misses', 'percent-of-absolute-row'],
['cas_badval', 'bad value', 'percent-of-absolute-row']
]},
'increment': {
'options': [None, 'Requests', 'requests', 'increment ops', 'memcached.increment', 'stacked'],
'lines': [
['incr_hits', 'hits', 'percent-of-absolute-row'],
['incr_misses', 'misses', 'percent-of-absolute-row']
]},
'decrement': {
'options': [None, 'Requests', 'requests', 'decrement ops', 'memcached.decrement', 'stacked'],
'lines': [
['decr_hits', 'hits', 'percent-of-absolute-row'],
['decr_misses', 'misses', 'percent-of-absolute-row']
]},
'touch': {
'options': [None, 'Requests', 'requests', 'touch ops', 'memcached.touch', 'stacked'],
'lines': [
['touch_hits', 'hits', 'percent-of-absolute-row'],
['touch_misses', 'misses', 'percent-of-absolute-row']
]},
'touch_rate': {
'options': [None, 'Rate', 'requests/s', 'touch ops', 'memcached.touch_rate', 'line'],
'lines': [
['cmd_touch', 'rate', 'incremental']
]}
}
class Service(SocketService):
def __init__(self, configuration=None, name=None):
SocketService.__init__(self, configuration=configuration, name=name)
self.request = "stats\r\n"
self.host = "localhost"
self.port = 11211
self._keep_alive = True
self.unix_socket = None
self.order = ORDER
self.definitions = CHARTS
def _get_data(self):
"""
Get data from socket
:return: dict
"""
response = self._get_raw_data()
if response is None:
# error has already been logged
return None
if response.startswith('ERROR'):
self.error("received ERROR")
return None
try:
parsed = response.split("\n")
except AttributeError:
self.error("response is invalid/empty")
return None
# split the response
data = {}
for line in parsed:
if line.startswith('STAT'):
try:
t = line[5:].split(' ')
data[t[0]] = t[1]
except (IndexError, ValueError):
self.debug("invalid line received: " + str(line))
pass
if len(data) == 0:
self.error("received data doesn't have any records")
return None
# custom calculations
try:
data['avail'] = int(data['limit_maxbytes']) - int(data['bytes'])
data['used'] = int(data['bytes'])
except:
pass
return data
def _check_raw_data(self, data):
if data.endswith('END\r\n'):
self.debug("received full response from memcached")
return True
self.debug("waiting more data from memcached")
return False
def check(self):
"""
Parse configuration, check if memcached is available
:return: boolean
"""
self._parse_config()
if self.name == "":
self.name = "local"
self.chart_name += "_" + self.name
data = self._get_data()
if data is None:
return False
return True
|
