diff options
Diffstat (limited to 'collectors/python.d.plugin/varnish/varnish.chart.py')
| -rw-r--r-- | collectors/python.d.plugin/varnish/varnish.chart.py | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/collectors/python.d.plugin/varnish/varnish.chart.py b/collectors/python.d.plugin/varnish/varnish.chart.py new file mode 100644 index 0000000..da67815 --- /dev/null +++ b/collectors/python.d.plugin/varnish/varnish.chart.py @@ -0,0 +1,262 @@ +# -*- coding: utf-8 -*- +# Description: varnish netdata python.d module +# Author: l2isbad +# SPDX-License-Identifier: GPL-3.0-or-later + +import re + +from bases.collection import find_binary +from bases.FrameworkServices.ExecutableService import ExecutableService + + +ORDER = [ + 'session_connections', + 'client_requests', + 'all_time_hit_rate', + 'current_poll_hit_rate', + 'cached_objects_expired', + 'cached_objects_nuked', + 'threads_total', + 'threads_statistics', + 'threads_queue_len', + 'backend_connections', + 'backend_requests', + 'esi_statistics', + 'memory_usage', + 'uptime' +] + +CHARTS = { + 'session_connections': { + 'options': [None, 'Connections Statistics', 'connections/s', + 'client metrics', 'varnish.session_connection', 'line'], + 'lines': [ + ['sess_conn', 'accepted', 'incremental'], + ['sess_dropped', 'dropped', 'incremental'] + ] + }, + 'client_requests': { + 'options': [None, 'Client Requests', 'requests/s', + 'client metrics', 'varnish.client_requests', 'line'], + 'lines': [ + ['client_req', 'received', 'incremental'] + ] + }, + 'all_time_hit_rate': { + 'options': [None, 'All History Hit Rate Ratio', 'percentage', 'cache performance', + 'varnish.all_time_hit_rate', 'stacked'], + 'lines': [ + ['cache_hit', 'hit', 'percentage-of-absolute-row'], + ['cache_miss', 'miss', 'percentage-of-absolute-row'], + ['cache_hitpass', 'hitpass', 'percentage-of-absolute-row']] + }, + 'current_poll_hit_rate': { + 'options': [None, 'Current Poll Hit Rate Ratio', 'percentage', 'cache performance', + 'varnish.current_poll_hit_rate', 'stacked'], + 'lines': [ + ['cache_hit', 'hit', 'percentage-of-incremental-row'], + ['cache_miss', 'miss', 'percentage-of-incremental-row'], + ['cache_hitpass', 'hitpass', 'percentage-of-incremental-row'] + ] + }, + 'cached_objects_expired': { + 'options': [None, 'Expired Objects', 'expired/s', 'cache performance', + 'varnish.cached_objects_expired', 'line'], + 'lines': [ + ['n_expired', 'objects', 'incremental'] + ] + }, + 'cached_objects_nuked': { + 'options': [None, 'Least Recently Used Nuked Objects', 'nuked/s', 'cache performance', + 'varnish.cached_objects_nuked', 'line'], + 'lines': [ + ['n_lru_nuked', 'objects', 'incremental'] + ] + }, + 'threads_total': { + 'options': [None, 'Number Of Threads In All Pools', 'number', 'thread related metrics', + 'varnish.threads_total', 'line'], + 'lines': [ + ['threads', None, 'absolute'] + ] + }, + 'threads_statistics': { + 'options': [None, 'Threads Statistics', 'threads/s', 'thread related metrics', + 'varnish.threads_statistics', 'line'], + 'lines': [ + ['threads_created', 'created', 'incremental'], + ['threads_failed', 'failed', 'incremental'], + ['threads_limited', 'limited', 'incremental'] + ] + }, + 'threads_queue_len': { + 'options': [None, 'Current Queue Length', 'requests', 'thread related metrics', + 'varnish.threads_queue_len', 'line'], + 'lines': [ + ['thread_queue_len', 'in queue'] + ] + }, + 'backend_connections': { + 'options': [None, 'Backend Connections Statistics', 'connections/s', 'backend metrics', + 'varnish.backend_connections', 'line'], + 'lines': [ + ['backend_conn', 'successful', 'incremental'], + ['backend_unhealthy', 'unhealthy', 'incremental'], + ['backend_reuse', 'reused', 'incremental'], + ['backend_toolate', 'closed', 'incremental'], + ['backend_recycle', 'resycled', 'incremental'], + ['backend_fail', 'failed', 'incremental'] + ] + }, + 'backend_requests': { + 'options': [None, 'Requests To The Backend', 'requests/s', 'backend metrics', + 'varnish.backend_requests', 'line'], + 'lines': [ + ['backend_req', 'sent', 'incremental'] + ] + }, + 'esi_statistics': { + 'options': [None, 'ESI Statistics', 'problems/s', 'esi related metrics', 'varnish.esi_statistics', 'line'], + 'lines': [ + ['esi_errors', 'errors', 'incremental'], + ['esi_warnings', 'warnings', 'incremental'] + ] + }, + 'memory_usage': { + 'options': [None, 'Memory Usage', 'MiB', 'memory usage', 'varnish.memory_usage', 'stacked'], + 'lines': [ + ['memory_free', 'free', 'absolute', 1, 1 << 20], + ['memory_allocated', 'allocated', 'absolute', 1, 1 << 20]] + }, + 'uptime': { + 'lines': [ + ['uptime', None, 'absolute'] + ], + 'options': [None, 'Uptime', 'seconds', 'uptime', 'varnish.uptime', 'line'] + } +} + +VARNISHSTAT = 'varnishstat' + + +class Parser: + _backend_new = re.compile(r'VBE.([\d\w_.]+)\(.*?\).(beresp[\w_]+)\s+(\d+)') + _backend_old = re.compile(r'VBE\.[\d\w-]+\.([\w\d_]+).(beresp[\w_]+)\s+(\d+)') + _default = re.compile(r'([A-Z]+\.)?([\d\w_.]+)\s+(\d+)') + + def __init__(self): + self.re_default = None + self.re_backend = None + + def init(self, data): + data = ''.join(data) + parsed_main = Parser._default.findall(data) + if parsed_main: + self.re_default = Parser._default + + parsed_backend = Parser._backend_new.findall(data) + if parsed_backend: + self.re_backend = Parser._backend_new + else: + parsed_backend = Parser._backend_old.findall(data) + if parsed_backend: + self.re_backend = Parser._backend_old + + def server_stats(self, data): + return self.re_default.findall(''.join(data)) + + def backend_stats(self, data): + return self.re_backend.findall(''.join(data)) + + +class Service(ExecutableService): + def __init__(self, configuration=None, name=None): + ExecutableService.__init__(self, configuration=configuration, name=name) + self.order = ORDER + self.definitions = CHARTS + self.instance_name = configuration.get('instance_name') + self.parser = Parser() + self.command = None + + def create_command(self): + varnishstat = find_binary(VARNISHSTAT) + + if not varnishstat: + self.error("can't locate '{0}' binary or binary is not executable by user netdata".format(VARNISHSTAT)) + return False + + if self.instance_name: + self.command = [varnishstat, '-1', '-n', self.instance_name, '-t', '1'] + else: + self.command = [varnishstat, '-1', '-t', '1'] + return True + + def check(self): + if not self.create_command(): + return False + + # STDOUT is not empty + reply = self._get_raw_data() + if not reply: + self.error("No output from 'varnishstat'. Is it running? Not enough privileges?") + return False + + self.parser.init(reply) + + # Output is parsable + if not self.parser.re_default: + self.error('Cant parse the output...') + return False + + if self.parser.re_backend: + backends = [b[0] for b in self.parser.backend_stats(reply)[::2]] + self.create_backends_charts(backends) + return True + + def get_data(self): + """ + Format data received from shell command + :return: dict + """ + raw = self._get_raw_data() + if not raw: + return None + + data = dict() + server_stats = self.parser.server_stats(raw) + if not server_stats: + return None + + if self.parser.re_backend: + backend_stats = self.parser.backend_stats(raw) + data.update(dict(('_'.join([name, param]), value) for name, param, value in backend_stats)) + + data.update(dict((param, value) for _, param, value in server_stats)) + + # varnish 5 uses default.g_bytes and default.g_space + data['memory_allocated'] = data.get('s0.g_bytes') or data.get('default.g_bytes') + data['memory_free'] = data.get('s0.g_space') or data.get('default.g_space') + + return data + + def create_backends_charts(self, backends): + for backend in backends: + chart_name = ''.join([backend, '_response_statistics']) + title = 'Backend "{0}"'.format(backend.capitalize()) + hdr_bytes = ''.join([backend, '_beresp_hdrbytes']) + body_bytes = ''.join([backend, '_beresp_bodybytes']) + + chart = { + chart_name: + { + 'options': [None, title, 'kilobits/s', 'backend response statistics', + 'varnish.backend', 'area'], + 'lines': [ + [hdr_bytes, 'header', 'incremental', 8, 1000], + [body_bytes, 'body', 'incremental', -8, 1000] + ] + } + } + + self.order.insert(0, chart_name) + self.definitions.update(chart) |