diff options
Diffstat (limited to 'python.d/python_modules/base.py')
| -rw-r--r-- | python.d/python_modules/base.py | 211 |
1 files changed, 141 insertions, 70 deletions
diff --git a/python.d/python_modules/base.py b/python.d/python_modules/base.py index 859300ec..a643cc6a 100644 --- a/python.d/python_modules/base.py +++ b/python.d/python_modules/base.py @@ -20,23 +20,20 @@ import time import os import socket -import select import threading -import msg import ssl from subprocess import Popen, PIPE from sys import exc_info - +from glob import glob +import re try: from urlparse import urlparse except ImportError: from urllib.parse import urlparse - try: import urllib.request as urllib2 except ImportError: import urllib2 - try: import MySQLdb PYMYSQL = True @@ -46,6 +43,7 @@ except ImportError: PYMYSQL = True except ImportError: PYMYSQL = False +import msg try: PATH = os.getenv('PATH').split(':') @@ -175,14 +173,15 @@ class SimpleService(threading.Thread): # it is important to do this in a loop # sleep() is interruptable while now < next: - self.debug("sleeping for", str(next - now), "secs to reach frequency of", str(step), "secs, now:", str(now), " next:", str(next), " penalty:", str(penalty)) + self.debug("sleeping for", str(next - now), "secs to reach frequency of", + str(step), "secs, now:", str(now), " next:", str(next), " penalty:", str(penalty)) time.sleep(next - now) now = float(time.time()) # do the job try: status = self._run_once() - except Exception as e: + except Exception: status = False if status: @@ -202,10 +201,12 @@ class SimpleService(threading.Thread): penalty = 600 self.retries_left = self.retries - self.alert("failed to collect data for " + str(self.retries) + " times - increasing penalty to " + str(penalty) + " sec and trying again") + self.alert("failed to collect data for " + str(self.retries) + + " times - increasing penalty to " + str(penalty) + " sec and trying again") else: - self.error("failed to collect data - " + str(self.retries_left) + " retries left - penalty: " + str(penalty) + " sec") + self.error("failed to collect data - " + str(self.retries_left) + + " retries left - penalty: " + str(penalty) + " sec") # --- CHART --- @@ -460,11 +461,42 @@ class SimpleService(threading.Thread): return next(('/'.join([p, binary]) for p in PATH if os.path.isfile('/'.join([p, binary])) and os.access('/'.join([p, binary]), os.X_OK))) - else: - return None + return None except StopIteration: return None + def _add_new_dimension(self, dimension_id, chart_name, dimension=None, algorithm='incremental', + multiplier=1, divisor=1, priority=65000): + """ + :param dimension_id: + :param chart_name: + :param dimension: + :param algorithm: + :param multiplier: + :param divisor: + :param priority: + :return: + """ + if not all([dimension_id not in self._dimensions, + chart_name in self.order, + chart_name in self.definitions]): + return + self._dimensions.append(dimension_id) + dimension_list = list(map(str, [dimension_id, + dimension if dimension else dimension_id, + algorithm, + multiplier, + divisor])) + self.definitions[chart_name]['lines'].append(dimension_list) + add_to_name = self.override_name or self.name + job_name = ('_'.join([self.__module__, re.sub('\s+', '_', add_to_name)]) + if add_to_name != 'None' else self.__module__) + chart = 'CHART {0}.{1} '.format(job_name, chart_name) + options = '"" "{0}" {1} "{2}" {3} {4} '.format(*self.definitions[chart_name]['options'][1:6]) + other = '{0} {1}\n'.format(priority, self.update_every) + new_dimension = "DIMENSION {0}\n".format(' '.join(dimension_list)) + print(chart + options + other + new_dimension) + class UrlService(SimpleService): def __init__(self, configuration=None, name=None): @@ -473,47 +505,73 @@ class UrlService(SimpleService): self.user = self.configuration.get('user') self.password = self.configuration.get('pass') self.ss_cert = self.configuration.get('ss_cert') + self.proxy = self.configuration.get('proxy') - def __add_openers(self): - def self_signed_cert(ss_cert): - if ss_cert: - try: - ctx = ssl.create_default_context() - ctx.check_hostname = False - ctx.verify_mode = ssl.CERT_NONE - return urllib2.build_opener(urllib2.HTTPSHandler(context=ctx)) - except AttributeError: - return None - else: - return None + def __add_openers(self, user=None, password=None, ss_cert=None, proxy=None, url=None): + user = user or self.user + password = password or self.password + ss_cert = ss_cert or self.ss_cert + proxy = proxy or self.proxy - self.opener = self_signed_cert(self.ss_cert) or urllib2.build_opener() + handlers = list() - # HTTP Basic Auth - if self.user and self.password: - url_parse = urlparse(self.url) + # HTTP Basic Auth handler + if all([user, password, isinstance(user, str), isinstance(password, str)]): + url = url or self.url + url_parse = urlparse(url) top_level_url = '://'.join([url_parse.scheme, url_parse.netloc]) passman = urllib2.HTTPPasswordMgrWithDefaultRealm() - passman.add_password(None, top_level_url, self.user, self.password) - self.opener.add_handler(urllib2.HTTPBasicAuthHandler(passman)) + passman.add_password(None, top_level_url, user, password) + handlers.append(urllib2.HTTPBasicAuthHandler(passman)) self.debug("Enabling HTTP basic auth") - def _get_raw_data(self, custom_url=None): + # HTTPS handler + # Self-signed certificate ignore + if ss_cert: + try: + ctx = ssl.create_default_context() + ctx.check_hostname = False + ctx.verify_mode = ssl.CERT_NONE + except AttributeError: + self.error('HTTPS self-signed certificate ignore not enabled') + else: + handlers.append(urllib2.HTTPSHandler(context=ctx)) + self.debug("Enabling HTTP self-signed certificate ignore") + + # PROXY handler + if proxy and isinstance(proxy, str) and not ss_cert: + handlers.append(urllib2.ProxyHandler(dict(http=proxy))) + self.debug("Enabling HTTP proxy handler (%s)" % proxy) + + opener = urllib2.build_opener(*handlers) + return opener + + def _build_opener(self, **kwargs): + try: + return self.__add_openers(**kwargs) + except TypeError as error: + self.error('build_opener() error:', str(error)) + return None + + def _get_raw_data(self, url=None, opener=None): """ Get raw data from http request :return: str """ - raw_data = None - f = None + data = None try: - f = self.opener.open(custom_url or self.url, timeout=self.update_every * 2) - raw_data = f.read().decode('utf-8', 'ignore') + opener = opener or self.opener + data = opener.open(url or self.url, timeout=self.update_every * 2) + raw_data = data.read().decode('utf-8', 'ignore') + except urllib2.URLError as error: + self.error('Url: %s. Error: %s' % (url or self.url, str(error))) + return None except Exception as error: - self.error('Url: %s. Error: %s' %(custom_url or self.url, str(error))) + self.error(str(error)) return None finally: - if f is not None: f.close() - + if data is not None: + data.close() return raw_data or None def check(self): @@ -525,7 +583,7 @@ class UrlService(SimpleService): self.error('URL is not defined or type is not <str>') return False - self.__add_openers() + self.opener = self.__add_openers() try: data = self._get_data() @@ -781,57 +839,69 @@ class SocketService(SimpleService): class LogService(SimpleService): def __init__(self, configuration=None, name=None): - self.log_path = "" - self._last_position = 0 - # self._log_reader = None SimpleService.__init__(self, configuration=configuration, name=name) + self.log_path = self.configuration.get('path') + self.__glob_path = self.log_path + self._last_position = 0 self.retries = 100000 # basically always retry + self.__re_find = dict(current=0, run=0, maximum=60) def _get_raw_data(self): """ Get log lines since last poll :return: list """ - lines = [] + lines = list() try: - if os.path.getsize(self.log_path) < self._last_position: + if self.__re_find['current'] == self.__re_find['run']: + self._find_recent_log_file() + size = os.path.getsize(self.log_path) + if size == self._last_position: + self.__re_find['current'] += 1 + return list() # return empty list if nothing has changed + elif size < self._last_position: self._last_position = 0 # read from beginning if file has shrunk - elif os.path.getsize(self.log_path) == self._last_position: - self.debug("Log file hasn't changed. No new data.") - return [] # return empty list if nothing has changed - with open(self.log_path, "r") as fp: + + with open(self.log_path) as fp: fp.seek(self._last_position) - for i, line in enumerate(fp): + for line in fp: lines.append(line) self._last_position = fp.tell() - except Exception as e: - self.error(str(e)) + self.__re_find['current'] = 0 + except (OSError, IOError) as error: + self.__re_find['current'] += 1 + self.error(str(error)) - if len(lines) != 0: - return lines - else: - self.error("No data collected.") - return None + return lines or None + + def _find_recent_log_file(self): + """ + :return: + """ + self.__re_find['run'] = self.__re_find['maximum'] + self.__re_find['current'] = 0 + self.__glob_path = self.__glob_path or self.log_path # workaround for modules w/o config files + path_list = glob(self.__glob_path) + if path_list: + self.log_path = max(path_list) + return True + return False def check(self): """ Parse basic configuration and check if log file exists :return: boolean """ - if self.name is not None or self.name != str(None): - self.name = "" - else: - self.name = str(self.name) - try: - self.log_path = str(self.configuration['path']) - except (KeyError, TypeError): - self.info("No path to log specified. Using: '" + self.log_path + "'") + if not self.log_path: + self.error("No path to log specified") + return None - if os.access(self.log_path, os.R_OK): + if all([self._find_recent_log_file(), + os.access(self.log_path, os.R_OK), + os.path.isfile(self.log_path)]): return True - else: - self.error("Cannot access file: '" + self.log_path + "'") - return False + self.error("Cannot access %s" % self.log_path) + return False def create(self): # set cursor at last byte of log file @@ -847,7 +917,7 @@ class ExecutableService(SimpleService): SimpleService.__init__(self, configuration=configuration, name=name) self.command = None - def _get_raw_data(self): + def _get_raw_data(self, stderr=False): """ Get raw data from executed command :return: <list> @@ -855,10 +925,11 @@ class ExecutableService(SimpleService): try: p = Popen(self.command, stdout=PIPE, stderr=PIPE) except Exception as error: - self.error("Executing command", self.command, "resulted in error:", str(error)) + self.error("Executing command", " ".join(self.command), "resulted in error:", str(error)) return None data = list() - for line in p.stdout.readlines(): + std = p.stderr if stderr else p.stdout + for line in std.readlines(): data.append(line.decode()) return data or None |