diff options
Diffstat (limited to 'collectors/python.d.plugin/memcached/memcached.chart.py')
| -rw-r--r-- | collectors/python.d.plugin/memcached/memcached.chart.py | 197 |
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 index 0000000..bb656a2 --- /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 |