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-rw-r--r--collectors/python.d.plugin/memcached/memcached.chart.py197
1 files changed, 197 insertions, 0 deletions
diff --git a/collectors/python.d.plugin/memcached/memcached.chart.py b/collectors/python.d.plugin/memcached/memcached.chart.py
new file mode 100644
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--- /dev/null
+++ b/collectors/python.d.plugin/memcached/memcached.chart.py
@@ -0,0 +1,197 @@
+# -*- coding: utf-8 -*-
+# Description: memcached netdata python.d module
+# Author: Pawel Krupa (paulfantom)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from bases.FrameworkServices.SocketService import SocketService
+
+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', 'MiB', 'cache', 'memcached.cache', 'stacked'],
+ 'lines': [
+ ['avail', 'available', 'absolute', 1, 1 << 20],
+ ['used', 'used', 'absolute', 1, 1 << 20]
+ ]
+ },
+ 'net': {
+ 'options': [None, 'Network', 'kilobits/s', 'network', 'memcached.net', 'area'],
+ 'lines': [
+ ['bytes_read', 'in', 'incremental', 8, 1000],
+ ['bytes_written', 'out', 'incremental', -8, 1000],
+ ]
+ },
+ '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.order = ORDER
+ self.definitions = CHARTS
+ self.request = 'stats\r\n'
+ self.host = 'localhost'
+ self.port = 11211
+ self._keep_alive = True
+ self.unix_socket = None
+
+ 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