web_log plugin: minor fixes plus some documentation
Ilya committed
Feb 9, 2017 at 22:58 UTC
28a24b0c498c2babbb3ccf6428a4ac263601d55b
1 file changed
+67
-6
python.d/web_log.chart.py
+67
-6
@@ -44,13 +44,13 @@ CHARTS = {
44
['resp_time_avg', 'avg', 'absolute', 1, 1]
45
]},
46
'clients': {
47
- 'options': [None, 'Current Poll Unique Client IPs', 'unique ips', 'unique clients', 'web_log.clients', 'line'],
47
+ 'options': [None, 'Current Poll Unique Client IPs', 'unique ips', 'unique clients', 'web_log.clients', 'stacked'],
48
'lines': [
49
['unique_cur_ipv4', 'ipv4', 'absolute', 1, 1],
50
['unique_cur_ipv6', 'ipv6', 'absolute', 1, 1]
51
]},
52
'clients_all': {
53
- 'options': [None, 'All Time Unique Client IPs', 'unique ips', 'unique clients', 'web_log.clients_all', 'line'],
53
+ 'options': [None, 'All Time Unique Client IPs', 'unique ips', 'unique clients', 'web_log.clients_all', 'stacked'],
54
'lines': [
55
['unique_tot_ipv4', 'ipv4', 'absolute', 1, 1],
56
['unique_tot_ipv6', 'ipv6', 'absolute', 1, 1]
@@ -67,7 +67,7 @@ NAMED_URL_PATTERN = namedtuple('URL_PATTERN', ['description', 'pattern'])
67
class Service(LogService):
68
def __init__(self, configuration=None, name=None):
69
LogService.__init__(self, configuration=configuration, name=name)
70
- # Vars from module configuration file
70
+ # Variables from module configuration file
71
self.log_path = self.configuration.get('path')
72
self.detailed_response_codes = self.configuration.get('detailed_response_codes', True)
73
self.all_time = self.configuration.get('all_time', True)
@@ -119,6 +119,14 @@ class Service(LogService):
119
return True
120
121
def find_regex(self, last_line):
122
+ """
123
+ :param last_line: str: literally last line from log file
124
+ :return: parsed line, regex name (the one that matches) OR None, None
125
+ It's sad but different web servers has different logs formats
126
+ We need to find appropriate regex for current log file
127
+ All logic is do a regex search through the string for all patterns
128
+ until we find something or fail.
129
+ """
130
# REGEX: 1.IPv4 address 2.HTTP method 3. URL 4. Response code
131
# 5. Bytes sent 6. Response length 7. Response process time
132
default = re.compile(r'([\da-f.:]+)'
@@ -160,13 +168,31 @@ class Service(LogService):
168
return None, None
169
170
def create_charts(self, parsed_line, regex_name):
171
+ """
172
+ :param parsed_line: list: re.findall result.
173
+ :param regex_name: str: regex name from 'find_regex' method. Ex.: 'apache_extended', 'nginx_extended'
174
+ :return:
175
+ Create additional charts depending on the 'find_regex' result (parsed_line) and configuration file
176
+ 1. 'time_response' chart is removed if there is no 'time_response' in logs.
177
+ 2. We need to change divisor for 'response_time' chart for apache (time in microseconds in logs)
178
+ 3. Other stuff is just remove/add chart depending on yes/no in conf
179
+ """
180
def find_job_name(override_name, name):
181
+ """
182
+ :param override_name: str: 'name' var from configuration file
183
+ :param name: str: 'job_name' from configuration file
184
+ :return: str: new job name
185
+ We need this for dynamic charts. Actually same logic as in python.d.plugin.
186
+ """
187
add_to_name = override_name or name
188
if add_to_name:
189
return '_'.join(['web_log', add_to_name])
190
else:
191
return 'web_log'
192
193
+ self.order = ORDER[:]
194
+ self.definitions = deepcopy(CHARTS)
195
+
196
job_name = find_job_name(self.override_name, self.name)
197
self.detailed_chart = 'CHART %s.detailed_response_codes ""' \
198
' "Response Codes" requests/s responses' \
@@ -174,8 +200,7 @@ class Service(LogService):
200
self.http_method_chart = 'CHART %s.http_method' \
201
' "" "HTTP Methods" requests/s requests' \
202
' web_log.http_method stacked 2 %s\n' % (job_name, self.update_every)
177
- self.order = ORDER[:]
178
- self.definitions = deepcopy(CHARTS)
203
+
204
if 'apache' in regex_name:
205
self.definitions['response_time']['lines'][0][4] = 1000
206
self.definitions['response_time']['lines'][1][4] = 1000
@@ -208,6 +233,13 @@ class Service(LogService):
233
self.order.remove('requests_per_url')
234
235
def add_new_dimension(self, dimension, line_list, chart_string, key):
236
+ """
237
+ :param dimension: str: response status code. Ex.: '202', '499'
238
+ :param line_list: list: Ex.: ['202', '202', 'Absolute']
239
+ :param chart_string: Current string we need to pass to netdata to rebuild the chart
240
+ :param key: str: CHARTS dict key (chart name). Ex.: 'response_time'
241
+ :return: str: new chart string = previous + new dimensions
242
+ """
243
self.storage.update({dimension: 0})
244
# SET method check if dim in _dimensions
245
self._dimensions.append(dimension)
@@ -221,7 +253,9 @@ class Service(LogService):
253
def _get_data(self):
254
"""
255
Parse new log lines
224
- :return: dict
256
+ :return: dict OR None
257
+ None if _get_raw_data method fails.
258
+ In all other cases - dict.
259
"""
260
raw = self._get_raw_data()
261
if raw is None:
@@ -279,11 +313,18 @@ class Service(LogService):
313
to_netdata['resp_time_min'] = request_time[0]
314
to_netdata['resp_time_avg'] = float(request_counter['sum']) / request_counter['count']
315
to_netdata['resp_time_max'] = request_time[-1]
316
+
317
to_netdata.update(self.storage)
318
to_netdata.update(default_dict)
319
return to_netdata
320
321
def _get_data_detailed_response_codes(self, code, default_dict):
322
+ """
323
+ :param code: str: CODE from parsed line. Ex.: '202, '499'
324
+ :param default_dict: defaultdict
325
+ :return:
326
+ Calls add_new_dimension method If the value is found for the first time
327
+ """
328
if code not in self.storage:
329
chart_string_copy = self.detailed_chart
330
self.detailed_chart = self.add_new_dimension(code, [code, code, 'absolute'],
@@ -291,6 +332,12 @@ class Service(LogService):
332
default_dict[code] += 1
333
334
def _get_data_http_method(self, method, default_dict):
335
+ """
336
+ :param method: str: METHOD from parsed line. Ex.: 'GET', 'POST'
337
+ :param default_dict: defaultdict
338
+ :return:
339
+ Calls add_new_dimension method If the value is found for the first time
340
+ """
341
if method not in self.storage:
342
chart_string_copy = self.http_method_chart
343
self.http_method_chart = self.add_new_dimension(method, [method, method, 'absolute'],
@@ -298,6 +345,13 @@ class Service(LogService):
345
default_dict[method] += 1
346
347
def _get_data_per_url(self, url, default_dict):
348
+ """
349
+ :param url: str: URL from parsed line
350
+ :param default_dict: defaultdict
351
+ :return:
352
+ Scan through string looking for the first location where patterns produce a match for all user
353
+ defined patterns
354
+ """
355
match = None
356
for elem in self.url_pattern:
357
if elem.pattern.search(url):
@@ -309,6 +363,13 @@ class Service(LogService):
363
364
365
def address_not_in_pool(pool, address, pool_size):
366
+ """
367
+ :param pool: list of ip addresses
368
+ :param address: ip address
369
+ :param pool_size: current size of pool
370
+ :return: True if address not pool and False address in pool
371
+ If address not in pool function add address to pool.
372
+ """
373
index = bisect.bisect_left(pool, address)
374
if index < pool_size:
375
if pool[index] == address: