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-rw-r--r--collectors/python.d.plugin/varnish/varnish.chart.py262
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
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+++ b/collectors/python.d.plugin/varnish/varnish.chart.py
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+# -*- 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)