1 # -*- coding: utf-8 -*-
2 # Description: varnish netdata python.d module
5 from base import SimpleService
7 from os import access as is_executable, X_OK
8 from subprocess import Popen, PIPE
11 # default module values (can be overridden per job in `config`)
16 ORDER = ['session', 'hit_rate', 'chit_rate', 'expunge', 'threads', 'backend_health', 'memory_usage', 'bad', 'uptime']
18 CHARTS = {'backend_health':
19 {'lines': [['backend_conn', 'conn', 'incremental', 1, 1],
20 ['backend_unhealthy', 'unhealthy', 'incremental', 1, 1],
21 ['backend_busy', 'busy', 'incremental', 1, 1],
22 ['backend_fail', 'fail', 'incremental', 1, 1],
23 ['backend_reuse', 'reuse', 'incremental', 1, 1],
24 ['backend_recycle', 'resycle', 'incremental', 1, 1],
25 ['backend_toolate', 'toolate', 'incremental', 1, 1],
26 ['backend_retry', 'retry', 'incremental', 1, 1],
27 ['backend_req', 'req', 'incremental', 1, 1]],
28 'options': [None, 'Backend health', 'connections', 'Backend health', 'varnish.backend_traf', 'line']},
30 {'lines': [['sess_drop_b', None, 'incremental', 1, 1],
31 ['backend_unhealthy_b', None, 'incremental', 1, 1],
32 ['fetch_failed', None, 'incremental', 1, 1],
33 ['backend_busy_b', None, 'incremental', 1, 1],
34 ['threads_failed_b', None, 'incremental', 1, 1],
35 ['threads_limited_b', None, 'incremental', 1, 1],
36 ['threads_destroyed_b', None, 'incremental', 1, 1],
37 ['thread_queue_len_b', 'queue_len', 'absolute', 1, 1],
38 ['losthdr_b', None, 'incremental', 1, 1],
39 ['esi_errors_b', None, 'incremental', 1, 1],
40 ['esi_warnings_b', None, 'incremental', 1, 1],
41 ['sess_fail_b', None, 'incremental', 1, 1],
42 ['sess_pipe_overflow_b', None, 'incremental', 1, 1]],
43 'options': [None, 'Misbehavior', 'problems', 'Problems summary', 'varnish.bad', 'line']},
45 {'lines': [['n_expired', 'expired', 'incremental', 1, 1],
46 ['n_lru_nuked', 'lru_nuked', 'incremental', 1, 1]],
47 'options': [None, 'Object expunging', 'objects', 'Cache performance', 'varnish.expunge', 'line']},
49 {'lines': [['cache_hit_perc', 'hit', 'absolute', 1, 100],
50 ['cache_miss_perc', 'miss', 'absolute', 1, 100],
51 ['cache_hitpass_perc', 'hitpass', 'absolute', 1, 100]],
52 'options': [None, 'All history hit rate ratio','percent', 'Cache performance', 'varnish.hit_rate', 'stacked']},
54 {'lines': [['cache_hit_cperc', 'hit', 'absolute', 1, 100],
55 ['cache_miss_cperc', 'miss', 'absolute', 1, 100],
56 ['cache_hitpass_cperc', 'hitpass', 'absolute', 1, 100]],
57 'options': [None, 'Current poll hit rate ratio','percent', 'Cache performance', 'varnish.chit_rate', 'stacked']},
59 {'lines': [['s0.g_space', 'available', 'absolute', 1, 1048576],
60 ['s0.g_bytes', 'allocated', 'absolute', -1, 1048576]],
61 'options': [None, 'Memory usage', 'megabytes', 'Memory usage', 'varnish.memory_usage', 'stacked']},
63 {'lines': [['sess_conn', 'conn', 'incremental', 1, 1],
64 ['client_req', 'requests', 'incremental', 1, 1],
65 ['sess_dropped', 'dropped', 'incremental', 1, 1]],
66 'options': [None, 'Sessions', 'units', 'Client metrics', 'varnish.session', 'line']},
68 {'lines': [['threads', None, 'absolute', 1, 1],
69 ['threads_created', 'created', 'incremental', 1, 1],
70 ['threads_failed', 'failed', 'incremental', 1, 1],
71 ['threads_limited', 'limited', 'incremental', 1, 1],
72 ['thread_queue_len', 'queue_len', 'incremental', 1, 1],
73 ['sess_queued', 'sess_queued', 'incremental', 1, 1]],
74 'options': [None, 'Thread status', 'threads', 'Thread-related metrics', 'varnish.threads', 'line']},
76 {'lines': [['uptime', None, 'absolute', 1, 1]],
77 'options': [None, 'Varnish uptime', 'seconds', 'Uptime', 'varnish.uptime', 'line']}
80 DIRECTORIES = ['/bin/', '/usr/bin/', '/sbin/', '/usr/sbin/']
83 class Service(SimpleService):
84 def __init__(self, configuration=None, name=None):
85 SimpleService.__init__(self, configuration=configuration, name=name)
87 self.varnish = [''.join([directory, 'varnishstat']) for directory in DIRECTORIES
88 if is_executable(''.join([directory, 'varnishstat']), X_OK)][0]
91 self.rgx_all = compile(r'([A-Z]+\.)([\d\w_.]+)\s+(\d+)')
93 # VBE.boot.super_backend.pipe_hdrbyte (new)
95 # VBE.default2(127.0.0.2,,81).bereq_bodybytes (old)
96 # Regex result: [('super_backend', 'beresp_hdrbytes', '0'), ('super_backend', 'beresp_bodybytes', '0')]
97 self.rgx_bck = (compile(r'VBE.([\d\w_.]+)\(.*?\).(beresp[\w_]+)\s+(\d+)'),
98 compile(r'VBE\.[\d\w-]+\.([\w\d_]+).(beresp[\w_]+)\s+(\d+)'))
99 self.cache_prev = list()
102 # Cant start without 'varnishstat' command
104 self.error('\'varnishstat\' command was not found in %s or not executable by netdata' % DIRECTORIES)
107 # If command is present and we can execute it we need to make sure..
108 # 1. STDOUT is not empty
109 reply = self._get_raw_data()
111 self.error('No output from \'varnishstat\' (not enough privileges?)')
114 # 2. Output is parsable (list is not empty after regex findall)
115 is_parsable = self.rgx_all.findall(reply)
117 self.error('Cant parse output (only varnish version 4+ supported)')
120 # We need to find the right regex for backend parse
121 self.backend_list = self.rgx_bck[0].findall(reply)[::2]
122 if self.backend_list:
123 self.rgx_bck = self.rgx_bck[0]
125 self.backend_list = self.rgx_bck[1].findall(reply)[::2]
126 self.rgx_bck = self.rgx_back[1]
128 # We are about to start!
131 self.info('Plugin was started successfully')
134 def _get_raw_data(self):
136 reply = Popen([self.varnish, '-1'], stdout=PIPE, stderr=PIPE, shell=False)
140 raw_data = reply.communicate()[0]
149 Format data received from shell command
152 raw_data = self._get_raw_data()
153 data_all = self.rgx_all.findall(raw_data)
154 data_backend = self.rgx_bck.findall(raw_data)
159 # 1. ALL data from 'varnishstat -1'. t - type(MAIN, MEMPOOL etc)
160 to_netdata = {k: int(v) for t, k, v in data_all}
162 # 2. ADD backend statistics
163 to_netdata.update({'_'.join([n, k]): int(v) for n, k, v in data_backend})
165 # 3. ADD additional keys to dict
166 # 3.1 Cache hit/miss/hitpass OVERALL in percent
167 cache_summary = sum([to_netdata.get('cache_hit', 0), to_netdata.get('cache_miss', 0),
168 to_netdata.get('cache_hitpass', 0)])
169 to_netdata['cache_hit_perc'] = find_percent(to_netdata.get('cache_hit', 0), cache_summary, 10000)
170 to_netdata['cache_miss_perc'] = find_percent(to_netdata.get('cache_miss', 0), cache_summary, 10000)
171 to_netdata['cache_hitpass_perc'] = find_percent(to_netdata.get('cache_hitpass', 0), cache_summary, 10000)
173 # 3.2 Cache hit/miss/hitpass CURRENT in percent
175 cache_summary = sum([to_netdata.get('cache_hit', 0), to_netdata.get('cache_miss', 0),
176 to_netdata.get('cache_hitpass', 0)]) - sum(self.cache_prev)
177 to_netdata['cache_hit_cperc'] = find_percent(to_netdata.get('cache_hit', 0) - self.cache_prev[0], cache_summary, 10000)
178 to_netdata['cache_miss_cperc'] = find_percent(to_netdata.get('cache_miss', 0) - self.cache_prev[1], cache_summary, 10000)
179 to_netdata['cache_hitpass_cperc'] = find_percent(to_netdata.get('cache_hitpass', 0) - self.cache_prev[2], cache_summary, 10000)
181 to_netdata['cache_hit_cperc'] = 0
182 to_netdata['cache_miss_cperc'] = 0
183 to_netdata['cache_hitpass_cperc'] = 0
185 self.cache_prev = [to_netdata.get('cache_hit', 0), to_netdata.get('cache_miss', 0), to_netdata.get('cache_hitpass', 0)]
187 # 3.3 Problems summary chart
188 for elem in ['backend_busy', 'backend_unhealthy', 'esi_errors', 'esi_warnings', 'losthdr', 'sess_drop',
189 'sess_fail', 'sess_pipe_overflow', 'threads_destroyed', 'threads_failed', 'threads_limited', 'thread_queue_len']:
190 to_netdata[''.join([elem, '_b'])] = to_netdata.get(elem, 0)
195 def create_charts(self):
196 # If 'all_charts' is true...ALL charts are displayed. If no only default + 'extra_charts'
197 #if self.configuration.get('all_charts'):
198 # self.order = EXTRA_ORDER
201 # extra_charts = list(filter(lambda chart: chart in EXTRA_ORDER, self.extra_charts.split()))
202 # except (AttributeError, NameError, ValueError):
203 # self.error('Extra charts disabled.')
206 self.order = ORDER[:]
207 #self.order.extend(extra_charts)
209 # Create static charts
210 self.definitions = {chart: values for chart, values in CHARTS.items() if chart in self.order}
212 # Create dynamic backend charts
213 if self.backend_list:
214 for backend in self.backend_list:
215 self.order.insert(0, ''.join([backend[0], '_resp_stats']))
216 self.definitions.update({''.join([backend[0], '_resp_stats']): {
218 '%s response statistics' % backend[0].capitalize(),
223 'lines': [[''.join([backend[0], '_beresp_hdrbytes']),
224 'header', 'incremental', 8, 1000],
225 [''.join([backend[0], '_beresp_bodybytes']),
226 'body', 'incremental', -8, 1000]]}})
229 def find_percent(value1, value2, multiply):
230 # If value2 is 0 return 0
234 return round(float(value1) / float(value2) * multiply)