netdata/python.d/memcached.chart.py at master · fars/netdata · GitHub

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# -*- coding: utf-8 -*-

# Description: memcached netdata python.d module

# Author: Pawel Krupa (paulfantom)

from bases.FrameworkServices.SocketService 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))

if not data:

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 (KeyError, ValueError, TypeError):

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()

data = self._get_data()

if data is None:

return False

return True

netdata/python.d/memcached.chart.py at master · fars/netdata · GitHub

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