mirror of
https://github.com/netdata/netdata.git
synced 2025-04-20 12:00:08 +00:00
258 lines
7.6 KiB
Python
258 lines
7.6 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Description: redis netdata python.d module
|
|
# Author: Pawel Krupa (paulfantom)
|
|
# Author: Ilya Mashchenko (ilyam8)
|
|
# SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
import re
|
|
|
|
from copy import deepcopy
|
|
|
|
from bases.FrameworkServices.SocketService import SocketService
|
|
|
|
REDIS_ORDER = [
|
|
'operations',
|
|
'hit_rate',
|
|
'memory',
|
|
'keys_redis',
|
|
'eviction',
|
|
'net',
|
|
'connections',
|
|
'clients',
|
|
'slaves',
|
|
'persistence',
|
|
'bgsave_now',
|
|
'bgsave_health',
|
|
'uptime',
|
|
]
|
|
|
|
PIKA_ORDER = [
|
|
'operations',
|
|
'hit_rate',
|
|
'memory',
|
|
'keys_pika',
|
|
'connections',
|
|
'clients',
|
|
'slaves',
|
|
'uptime',
|
|
]
|
|
|
|
|
|
CHARTS = {
|
|
'operations': {
|
|
'options': [None, 'Operations', 'operations/s', 'operations', 'redis.operations', 'line'],
|
|
'lines': [
|
|
['total_commands_processed', 'commands', 'incremental'],
|
|
['instantaneous_ops_per_sec', 'operations', 'absolute']
|
|
]
|
|
},
|
|
'hit_rate': {
|
|
'options': [None, 'Hit rate', 'percentage', 'hits', 'redis.hit_rate', 'line'],
|
|
'lines': [
|
|
['hit_rate', 'rate', 'absolute']
|
|
]
|
|
},
|
|
'memory': {
|
|
'options': [None, 'Memory utilization', 'KiB', 'memory', 'redis.memory', 'line'],
|
|
'lines': [
|
|
['used_memory', 'total', 'absolute', 1, 1024],
|
|
['used_memory_lua', 'lua', 'absolute', 1, 1024]
|
|
]
|
|
},
|
|
'net': {
|
|
'options': [None, 'Bandwidth', 'kilobits/s', 'network', 'redis.net', 'area'],
|
|
'lines': [
|
|
['total_net_input_bytes', 'in', 'incremental', 8, 1000],
|
|
['total_net_output_bytes', 'out', 'incremental', -8, 1000]
|
|
]
|
|
},
|
|
'keys_redis': {
|
|
'options': [None, 'Keys per Database', 'keys', 'keys', 'redis.keys', 'line'],
|
|
'lines': []
|
|
},
|
|
'keys_pika': {
|
|
'options': [None, 'Keys', 'keys', 'keys', 'redis.keys', 'line'],
|
|
'lines': [
|
|
['kv_keys', 'kv', 'absolute'],
|
|
['hash_keys', 'hash', 'absolute'],
|
|
['list_keys', 'list', 'absolute'],
|
|
['zset_keys', 'zset', 'absolute'],
|
|
['set_keys', 'set', 'absolute']
|
|
]
|
|
},
|
|
'eviction': {
|
|
'options': [None, 'Evicted Keys', 'keys', 'keys', 'redis.eviction', 'line'],
|
|
'lines': [
|
|
['evicted_keys', 'evicted', 'absolute']
|
|
]
|
|
},
|
|
'connections': {
|
|
'options': [None, 'Connections', 'connections/s', 'connections', 'redis.connections', 'line'],
|
|
'lines': [
|
|
['total_connections_received', 'received', 'incremental', 1],
|
|
['rejected_connections', 'rejected', 'incremental', -1]
|
|
]
|
|
},
|
|
'clients': {
|
|
'options': [None, 'Clients', 'clients', 'connections', 'redis.clients', 'line'],
|
|
'lines': [
|
|
['connected_clients', 'connected', 'absolute', 1],
|
|
['blocked_clients', 'blocked', 'absolute', -1]
|
|
]
|
|
},
|
|
'slaves': {
|
|
'options': [None, 'Slaves', 'slaves', 'replication', 'redis.slaves', 'line'],
|
|
'lines': [
|
|
['connected_slaves', 'connected', 'absolute']
|
|
]
|
|
},
|
|
'persistence': {
|
|
'options': [None, 'Persistence Changes Since Last Save', 'changes', 'persistence',
|
|
'redis.rdb_changes', 'line'],
|
|
'lines': [
|
|
['rdb_changes_since_last_save', 'changes', 'absolute']
|
|
]
|
|
},
|
|
'bgsave_now': {
|
|
'options': [None, 'Duration of the RDB Save Operation', 'seconds', 'persistence',
|
|
'redis.bgsave_now', 'absolute'],
|
|
'lines': [
|
|
['rdb_bgsave_in_progress', 'rdb save', 'absolute']
|
|
]
|
|
},
|
|
'bgsave_health': {
|
|
'options': [None, 'Status of the Last RDB Save Operation', 'status', 'persistence',
|
|
'redis.bgsave_health', 'line'],
|
|
'lines': [
|
|
['rdb_last_bgsave_status', 'rdb save', 'absolute']
|
|
]
|
|
},
|
|
'uptime': {
|
|
'options': [None, 'Uptime', 'seconds', 'uptime', 'redis.uptime', 'line'],
|
|
'lines': [
|
|
['uptime_in_seconds', 'uptime', 'absolute']
|
|
]
|
|
}
|
|
}
|
|
|
|
|
|
def copy_chart(name):
|
|
return {name: deepcopy(CHARTS[name])}
|
|
|
|
|
|
RE = re.compile(r'\n([a-z_0-9 ]+):(?:keys=)?([^,\r]+)')
|
|
|
|
|
|
class Service(SocketService):
|
|
def __init__(self, configuration=None, name=None):
|
|
SocketService.__init__(self, configuration=configuration, name=name)
|
|
self.order = list()
|
|
self.definitions = dict()
|
|
self._keep_alive = True
|
|
self.host = self.configuration.get('host', 'localhost')
|
|
self.port = self.configuration.get('port', 6379)
|
|
self.unix_socket = self.configuration.get('socket')
|
|
p = self.configuration.get('pass')
|
|
self.auth_request = 'AUTH {0} \r\n'.format(p).encode() if p else None
|
|
self.request = 'INFO\r\n'.encode()
|
|
self.bgsave_time = 0
|
|
|
|
def do_auth(self):
|
|
resp = self._get_raw_data(request=self.auth_request)
|
|
if not resp:
|
|
return False
|
|
if resp.strip() != '+OK':
|
|
self.error('invalid password')
|
|
return False
|
|
return True
|
|
|
|
def get_raw_and_parse(self):
|
|
if self.auth_request and not self.do_auth():
|
|
return None
|
|
|
|
resp = self._get_raw_data()
|
|
|
|
if not resp:
|
|
return None
|
|
|
|
parsed = RE.findall(resp)
|
|
|
|
if not parsed:
|
|
self.error('response is invalid/empty')
|
|
return None
|
|
|
|
return dict((k.replace(' ', '_'), v) for k, v in parsed)
|
|
|
|
def get_data(self):
|
|
"""
|
|
Get data from socket
|
|
:return: dict
|
|
"""
|
|
data = self.get_raw_and_parse()
|
|
|
|
if not data:
|
|
return None
|
|
|
|
try:
|
|
data['hit_rate'] = (
|
|
(int(data['keyspace_hits']) * 100) / (int(data['keyspace_hits']) + int(data['keyspace_misses']))
|
|
)
|
|
except (KeyError, ZeroDivisionError):
|
|
data['hit_rate'] = 0
|
|
|
|
if data.get('redis_version') and data.get('rdb_bgsave_in_progress'):
|
|
self.get_data_redis_specific(data)
|
|
|
|
return data
|
|
|
|
def get_data_redis_specific(self, data):
|
|
if data['rdb_bgsave_in_progress'] != '0':
|
|
self.bgsave_time += self.update_every
|
|
else:
|
|
self.bgsave_time = 0
|
|
|
|
data['rdb_last_bgsave_status'] = 0 if data['rdb_last_bgsave_status'] == 'ok' else 1
|
|
data['rdb_bgsave_in_progress'] = self.bgsave_time
|
|
|
|
def check(self):
|
|
"""
|
|
Parse configuration, check if redis is available, and dynamically create chart lines data
|
|
:return: boolean
|
|
"""
|
|
data = self.get_raw_and_parse()
|
|
|
|
if not data:
|
|
return False
|
|
|
|
self.order = PIKA_ORDER if data.get('pika_version') else REDIS_ORDER
|
|
|
|
for n in self.order:
|
|
self.definitions.update(copy_chart(n))
|
|
|
|
if data.get('redis_version'):
|
|
for k in data:
|
|
if k.startswith('db'):
|
|
self.definitions['keys_redis']['lines'].append([k, None, 'absolute'])
|
|
|
|
return True
|
|
|
|
def _check_raw_data(self, data):
|
|
"""
|
|
Check if all data has been gathered from socket.
|
|
Parse first line containing message length and check against received message
|
|
:param data: str
|
|
:return: boolean
|
|
"""
|
|
length = len(data)
|
|
supposed = data.split('\n')[0][1:-1]
|
|
offset = len(supposed) + 4 # 1 dollar sing, 1 new line character + 1 ending sequence '\r\n'
|
|
if not supposed.isdigit():
|
|
return True
|
|
supposed = int(supposed)
|
|
|
|
if length - offset >= supposed:
|
|
self.debug('received full response from redis')
|
|
return True
|
|
|
|
self.debug('waiting more data from redis')
|
|
return False
|