# using ".encode()" in one thread can block other threads as well (only in python2)
import time
-# import sys
import os
import socket
import select
+import threading
+import msg
+import ssl
+from subprocess import Popen, PIPE
+from sys import exc_info
+
try:
import urllib.request as urllib2
except ImportError:
import urllib2
-from subprocess import Popen, PIPE
+try:
+ import MySQLdb
+ PYMYSQL = True
+except ImportError:
+ try:
+ import pymysql as MySQLdb
+ PYMYSQL = True
+ except ImportError:
+ PYMYSQL = False
-import threading
-import msg
+try:
+ PATH = os.getenv('PATH').split(':')
+except AttributeError:
+ PATH = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'.split(':')
# class BaseService(threading.Thread):
self.__first_run = True
self.order = []
self.definitions = {}
+ self._data_from_check = dict()
if configuration is None:
self.error("BaseService: no configuration parameters supplied. Cannot create Service.")
raise RuntimeError
Return value presents exit status of update()
:return: boolean
"""
- t_start = time.time()
- timetable = self.timetable
+ t_start = float(time.time())
chart_name = self.chart_name
- # check if it is time to execute job update() function
- if timetable['next'] > t_start:
- self.debug(chart_name, "will be run in", str(int((timetable['next'] - t_start) * 1000)), "ms")
- return True
-
- since_last = int((t_start - timetable['last']) * 1000000)
- self.debug(chart_name,
- "ready to run, after", str(int((t_start - timetable['last']) * 1000)),
- "ms (update_every:", str(timetable['freq'] * 1000),
- "ms, latency:", str(int((t_start - timetable['next']) * 1000)), "ms")
-
+ since_last = int((t_start - self.timetable['last']) * 1000000)
if self.__first_run:
since_last = 0
self.error("update function failed.")
return False
- t_end = time.time()
- self.timetable['next'] = t_end - (t_end % timetable['freq']) + timetable['freq']
-
# draw performance graph
- run_time = str(int((t_end - t_start) * 1000))
- # noinspection SqlNoDataSourceInspection
+ run_time = int((time.time() - t_start) * 1000)
print("BEGIN netdata.plugin_pythond_%s %s\nSET run_time = %s\nEND\n" %
- (self.chart_name, str(since_last), run_time))
+ (self.chart_name, str(since_last), str(run_time)))
self.debug(chart_name, "updated in", str(run_time), "ms")
self.timetable['last'] = t_start
Exits when job failed or timed out.
:return: None
"""
- self.timetable['last'] = time.time()
- self.debug("starting data collection - update frequency: " + str(self.update_every) + ", retries allowed: " + str(self.retries))
+ step = float(self.timetable['freq'])
+ penalty = 0
+ self.timetable['last'] = float(time.time() - step)
+ self.debug("starting data collection - update frequency:", str(step), " retries allowed:", str(self.retries))
while True: # run forever, unless something is wrong
+ now = float(time.time())
+ next = self.timetable['next'] = now - (now % step) + step + penalty
+
+ # 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))
+ time.sleep(next - now)
+ now = float(time.time())
+
+ # do the job
try:
status = self._run_once()
except Exception as e:
- self.alert("internal error - aborting data collection: " + str(e))
- return
+ status = False
- if status: # handle retries if update failed
- time.sleep(self.timetable['next'] - time.time())
+ if status:
+ # it is good
self.retries_left = self.retries
+ penalty = 0
else:
+ # it failed
self.retries_left -= 1
if self.retries_left <= 0:
- self.alert("failed to collect data - no more retries allowed - aborting data collection")
- return
+ if penalty == 0:
+ penalty = float(self.retries * step) / 2
+ else:
+ penalty *= 1.5
+
+ if penalty > 600:
+ 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")
+
else:
- self.error("failed to collect data. " + str(self.retries_left) + " retries left.")
- time.sleep(self.timetable['freq'])
+ self.error("failed to collect data - " + str(self.retries_left) + " retries left - penalty: " + str(penalty) + " sec")
# --- CHART ---
"""
Upload new data to netdata.
"""
- print(self._data_stream)
+ try:
+ print(self._data_stream)
+ except Exception as e:
+ msg.fatal('cannot send data to netdata:', str(e))
self._data_stream = ""
# --- ERROR HANDLING ---
Create charts
:return: boolean
"""
- data = self._get_data()
+ data = self._data_from_check or self._get_data()
if data is None:
self.debug("failed to receive data during create().")
return False
return updated
+ @staticmethod
+ def find_binary(binary):
+ try:
+ if isinstance(binary, str):
+ binary = os.path.basename(binary)
+ 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
+ except StopIteration:
+ return None
+
class UrlService(SimpleService):
# TODO add support for https connections
def __add_openers(self):
# TODO add error handling
- self.opener = urllib2.build_opener()
+ if self.ss_cert:
+ try:
+ ctx = ssl.create_default_context()
+ ctx.check_hostname = False
+ ctx.verify_mode = ssl.CERT_NONE
+ self.opener = urllib2.build_opener(urllib2.HTTPSHandler(context=ctx))
+ except Exception as error:
+ self.error(str(error))
+ self.opener = urllib2.build_opener()
+ else:
+ self.opener = urllib2.build_opener()
# Proxy handling
# TODO currently self.proxies isn't parsed from configuration file
return None
try:
- raw = f.read().decode('utf-8')
+ raw = f.read().decode('utf-8', 'ignore')
except Exception as e:
self.error(str(e))
finally:
self.password = str(self.configuration['pass'])
except (KeyError, TypeError):
pass
-
+ self.ss_cert = self.configuration.get('ss_cert')
self.__add_openers()
test = self._get_data()
self.__socket_config = res
return True
- def _connect2unixsocket(self, path=None):
+ def _connect2unixsocket(self):
"""
Connect to a unix socket, given its filename
:return: boolean
"""
- if path is None:
+ if self.unix_socket is None:
self.error("cannot connect to unix socket 'None'")
return False
try:
- self.debug("attempting DGRAM unix socket '" + str(path) + "'")
+ self.debug("attempting DGRAM unix socket '" + str(self.unix_socket) + "'")
self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
- self._sock.connect(path)
- self.debug("connected DGRAM unix socket '" + str(path) + "'")
+ self._sock.connect(self.unix_socket)
+ self.debug("connected DGRAM unix socket '" + str(self.unix_socket) + "'")
return True
except socket.error as e:
- self.error("Failed to connect DGRAM unix socket '" + str(path) + "':", str(e))
+ self.debug("Failed to connect DGRAM unix socket '" + str(self.unix_socket) + "':", str(e))
try:
- self.debug("attempting STREAM unix socket '" + str(path) + "'")
+ self.debug("attempting STREAM unix socket '" + str(self.unix_socket) + "'")
self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
- self._sock.connect(path)
- self.debug("connected STREAM unix socket '" + str(path) + "'")
+ self._sock.connect(self.unix_socket)
+ self.debug("connected STREAM unix socket '" + str(self.unix_socket) + "'")
return True
except socket.error as e:
- self.error("Failed to connect STREAM unix socket '" + str(path) + "':", str(e))
+ self.debug("Failed to connect STREAM unix socket '" + str(self.unix_socket) + "':", str(e))
+ self.error("Failed to connect to unix socket '" + str(self.unix_socket) + "':", str(e))
self._sock = None
return False
"""
try:
if self.unix_socket is not None:
- _connect2unixsocket(self.unix_socket)
+ self._connect2unixsocket()
else:
if self.__socket_config is not None:
break
if buf is None or len(buf) == 0: # handle server disconnect
- if len(data) == 0:
+ if data == "":
self._socketerror("unexpectedly disconnected")
else:
self.debug("server closed the connection")
break
self.debug("received data:", str(buf))
- data += buf.decode(errors='ignore')
+ data += buf.decode('utf-8', 'ignore')
if self._check_raw_data(data):
break
class ExecutableService(SimpleService):
- bad_substrings = ('&', '|', ';', '>', '<')
def __init__(self, configuration=None, name=None):
- self.command = ""
SimpleService.__init__(self, configuration=configuration, name=name)
+ self.command = None
def _get_raw_data(self):
"""
Get raw data from executed command
- :return: str
+ :return: <list>
"""
try:
p = Popen(self.command, stdout=PIPE, stderr=PIPE)
- except Exception as e:
- self.error("Executing command", self.command, "resulted in error:", str(e))
+ except Exception as error:
+ self.error("Executing command", self.command, "resulted in error:", str(error))
return None
- data = []
+ data = list()
for line in p.stdout.readlines():
- data.append(str(line.decode()))
+ data.append(line.decode())
- if len(data) == 0:
- self.error("No data collected.")
- return None
-
- return data
+ return data or None
def check(self):
"""
Parse basic configuration, check if command is whitelisted and is returning values
- :return: boolean
+ :return: <boolean>
"""
- if self.name is not None or self.name != str(None):
- self.name = ""
+ # Preference: 1. "command" from configuration file 2. "command" from plugin (if specified)
+ if 'command' in self.configuration:
+ self.command = self.configuration['command']
+
+ # "command" must be: 1.not None 2. type <str>
+ if not (self.command and isinstance(self.command, str)):
+ self.error('Command is not defined or command type is not <str>')
+ return False
+
+ # Split "command" into: 1. command <str> 2. options <list>
+ command, opts = self.command.split()[0], self.command.split()[1:]
+
+ # Check for "bad" symbols in options. No pipes, redirects etc. TODO: what is missing?
+ bad_opts = set(''.join(opts)) & set(['&', '|', ';', '>', '<'])
+ if bad_opts:
+ self.error("Bad command argument(s): %s" % bad_opts)
+ return False
+
+ # Find absolute path ('echo' => '/bin/echo')
+ if '/' not in command:
+ command = self.find_binary(command)
+ if not command:
+ self.error('Can\'t locate "%s" binary in PATH(%s)' % (self.command, PATH))
+ return False
+ # Check if binary exist and executable
else:
- self.name = str(self.name)
+ if not (os.path.isfile(command) and os.access(command, os.X_OK)):
+ self.error('"%s" is not a file or not executable' % command)
+ return False
+
+ self.command = [command] + opts if opts else [command]
+
try:
- self.command = str(self.configuration['command'])
- except (KeyError, TypeError):
- self.info("No command specified. Using: '" + self.command + "'")
- command = self.command.split(' ')
+ data = self._get_data()
+ except Exception as error:
+ self.error('_get_data() failed. Command: %s. Error: %s' % (self.command, error))
+ return False
- for arg in command[1:]:
- if any(st in arg for st in self.bad_substrings):
- self.error("Bad command argument:" + " ".join(self.command[1:]))
- return False
+ if isinstance(data, dict) and data:
+ # We need this for create() method. No reason to execute get_data() again if result is not empty dict()
+ self._data_from_check = data
+ return True
+ else:
+ self.error("Command", str(self.command), "returned no data")
+ return False
+
+
+class MySQLService(SimpleService):
+
+ def __init__(self, configuration=None, name=None):
+ SimpleService.__init__(self, configuration=configuration, name=name)
+ self.__connection = None
+ self.conn_properties = dict()
+ self.queries = dict()
+
+ def __connect(self):
+ try:
+ connection = MySQLdb.connect(connect_timeout=self.update_every, **self.conn_properties)
+ except (MySQLdb.MySQLError, TypeError) as error:
+ return None, str(error)
+ else:
+ return connection, None
+
+ def check(self):
+ def get_connection_properties(conf):
+ properties = dict()
+ if 'user' in conf and conf['user']:
+ properties['user'] = conf['user']
+ if 'pass' in conf and conf['pass']:
+ properties['passwd'] = conf['pass']
+ if 'socket' in conf and conf['socket']:
+ properties['unix_socket'] = conf['socket']
+ elif 'host' in conf and conf['host']:
+ properties['host'] = conf['host']
+ properties['port'] = int(conf['port']) if conf.get('port') else 3306
+ elif 'my.cnf' in conf and conf['my.cnf']:
+ properties['read_default_file'] = conf['my.cnf']
+
+ return properties or None
+
+ def is_valid_queries_dict(raw_queries, log_error):
+ """
+ :param raw_queries: dict:
+ :param log_error: function:
+ :return: dict or None
+
+ raw_queries is valid when: type <dict> and not empty after is_valid_query(for all queries)
+ """
+ def is_valid_query(query):
+ return all([isinstance(query, str),
+ query.startswith(('SELECT', 'select', 'SHOW', 'show'))])
+
+ if isinstance(raw_queries, dict) and raw_queries:
+ valid_queries = dict([(n, q) for n, q in raw_queries.items() if is_valid_query(q)])
+ bad_queries = set(raw_queries) - set(valid_queries)
+
+ if bad_queries:
+ log_error('Removed query(s): %s' % bad_queries)
+ return valid_queries
+ else:
+ log_error('Unsupported "queries" format. Must be not empty <dict>')
+ return None
- # test command and search for it in /usr/sbin or /sbin when failed
- base = command[0].split('/')[-1]
- if self._get_raw_data() is None:
- for prefix in ['/sbin/', '/usr/sbin/']:
- command[0] = prefix + base
- if os.path.isfile(command[0]):
- break
-
- self.command = command
- if self._get_data() is None or len(self._get_data()) == 0:
- self.error("Command", self.command, "returned no data")
+ if not PYMYSQL:
+ self.error('MySQLdb or PyMySQL module is needed to use mysql.chart.py plugin')
return False
- return True
+ # Check if "self.queries" exist, not empty and all queries are in valid format
+ self.queries = is_valid_queries_dict(self.queries, self.error)
+ if not self.queries:
+ return None
+
+ # Get connection properties
+ self.conn_properties = get_connection_properties(self.configuration)
+ if not self.conn_properties:
+ self.error('Connection properties are missing')
+ return False
+
+ # Create connection to the database
+ self.__connection, error = self.__connect()
+ if error:
+ self.error('Can\'t establish connection to MySQL: %s' % error)
+ return False
+
+ try:
+ data = self._get_data()
+ except Exception as error:
+ self.error('_get_data() failed. Error: %s' % error)
+ return False
+
+ if isinstance(data, dict) and data:
+ # We need this for create() method
+ self._data_from_check = data
+ return True
+ else:
+ self.error("_get_data() returned no data or type is not <dict>")
+ return False
+
+ def _get_raw_data(self, description=None):
+ """
+ Get raw data from MySQL server
+ :return: dict: fetchall() or (fetchall(), description)
+ """
+
+ if not self.__connection:
+ self.__connection, error = self.__connect()
+ if error:
+ return None
+
+ raw_data = dict()
+ try:
+ with self.__connection as cursor:
+ for name, query in self.queries.items():
+ try:
+ cursor.execute(query)
+ except (MySQLdb.ProgrammingError, MySQLdb.OperationalError) as error:
+ if exc_info()[0] == MySQLdb.OperationalError and 'denied' not in str(error):
+ raise RuntimeError
+ self.error('Removed query: %s[%s]. Error: %s'
+ % (name, query, error))
+ self.queries.pop(name)
+ continue
+ else:
+ raw_data[name] = (cursor.fetchall(), cursor.description) if description else cursor.fetchall()
+ self.__connection.commit()
+ except (MySQLdb.MySQLError, RuntimeError, TypeError, AttributeError):
+ self.__connection.close()
+ self.__connection = None
+ return None
+ else:
+ return raw_data or None
projects / netdata.git / blobdiff