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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ"""This file is a library of some essential classes for our agent's use.""" import time import logging import os import itertools import subprocess import sys import signal import locale import socket try: import json except ImportError: import simplejson as json try: # Python 2.x import httplib except: import http.client as httplib if sys.version[0] == "3": from io import BytesIO as StringIO else: from StringIO import StringIO # Set the locale for LC numeric to prevent issue with weird languages like de_DE # and wrap that in a custom float function that converts int to str so atof # doesnt break. If we don't have an LC_ALL environment variable, set one to avoid # an exception from locale if "LC_ALL" not in os.environ: os.environ["LC_ALL"] = "C" locale.setlocale(locale.LC_NUMERIC) def custom_float(value): try: return locale.atof(str(value)) except Exception: if type(__builtins__) == type({}): return __builtins__["float"](value) return __builtins__.float(value) float = custom_float LOCAL_CACHE_RESULTS = {} DEFAULT_CACHE_TIMEOUT = 60 # Needed to support older version so of Python def any(iterable): for element in iterable: if element: return True return False def all(iterable): for element in iterable: if not element: return False return True def total_seconds(timedelta): return ( timedelta.microseconds + (timedelta.seconds + timedelta.days * 24 * 3600) * 10**6 ) / 10**6 # statuses for the individual resource textkeys SUPPORTED = 0 UNSUPPORTED = 1 MISCONFIGURED = 2 # these are additional paths that which() should search, that may not be on the # user's path. some of these contain binaries that the plugins need to run, # for example, apachectl on centos lives in /usr/sbin ADDITIONAL_SEARCH_PATHS = [ "/usr/local/sbin", "/usr/local/bin", "/usr/sbin", "/usr/bin", "/sbin", "/bin", ] def which(program, exc=False): def is_exe(fpath): return os.path.exists(fpath) and os.access(fpath, os.X_OK) fpath, fname = os.path.split(program) if fpath: if is_exe(program): return program else: if "PATH" not in os.environ: return None for path in itertools.chain( os.environ["PATH"].split(os.pathsep), ADDITIONAL_SEARCH_PATHS ): exe_file = os.path.join(path, program) if is_exe(exe_file): return exe_file if exc: raise Exception("%r not found" % program) else: return None def run_command(command_args, timeout=5): p = subprocess.run( command_args, shell=False, timeout=timeout, check=True, capture_output=True ) return p.stdout.decode("utf-8") def execute_command( cmd, cwd=None, shell=True, kill_tree=True, timeout=15, env=None, block=True, cache_timeout=None, ): "Run a command line call with a timeout after which it will be forcibly killed." if shell is False: cmd = cmd.split() log = logging.getLogger("execute_command") if cache_timeout: # We search first for the cached result for that specific command. cached_result = LOCAL_CACHE_RESULTS.get(cmd) if ( cached_result and time.time() - cached_result.get("timestamp") < cache_timeout ): log.debug("Retrieved information from the local cache timeout for %s" % cmd) return cached_result.get("retcode"), cached_result.get("output") p = None if "darwin" == sys.platform.lower(): p = subprocess.Popen( cmd, shell=shell, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env, ) if not block: return try: stdout, stderr = p.communicate(timeout=timeout) except subprocess.TimeoutExpired as te: pids = [p.pid] if kill_tree: pids.extend(get_process_children(p.pid)) for pid in pids: # process might have died before getting to this line # so wrap to avoid OSError: no such process try: os.kill(pid, signal.SIGKILL) except OSError: pass return -9, "Timeout exceeded, process killed" else: class Alarm(Exception): pass def alarm_handler(signum, frame): raise Alarm # Kick off the command, and exit if we're not running in blocking mode waiting for a response p = subprocess.Popen( cmd, shell=shell, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env, ) if not block: return if timeout != -1 and timeout != None: signal.signal(signal.SIGALRM, alarm_handler) signal.alarm(timeout) try: stdout, stderr = p.communicate() if timeout != -1 and timeout != None: signal.alarm(0) except Alarm: pids = [p.pid] if kill_tree: pids.extend(get_process_children(p.pid)) for pid in pids: # process might have died before getting to this line # so wrap to avoid OSError: no such process try: os.kill(pid, signal.SIGKILL) except OSError: pass return -9, "Timeout exceeded, process killed" retcode = p.returncode if not stdout: stdout = stderr output = stdout.decode("utf8") if cache_timeout: # Create the cache for this result so subsequent calls use it # instead of making the same calls. log.debug("Created cache for cmd %s" % cmd) LOCAL_CACHE_RESULTS[cmd] = { "retcode": retcode, "output": output, "timestamp": time.time(), } log.debug("%s: %s %s" % (cmd, retcode, output)) return (retcode, output) def get_process_children(pid): "Helper method for killing off child processes when they timeout" p = subprocess.Popen( "ps --no-headers -o pid --ppid %d" % pid, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, ) stdout, stderr = p.communicate() return [int(p) for p in stdout.split()] def get_container_ip(container): try: networks = container["NetworkSettings"]["Networks"] network = list(networks.values())[0] return network["IPAddress"] except Exception: t, e = sys.exc_info()[:2] logging.exception(e) raise e def json_loads(val, **kwargs): try: return json.loads(val, **kwargs) except TypeError: # Python 3.5 json module does not support bytes return json.loads(val.decode(), **kwargs) # Subclass of HTTPConnection that allows connecting to a UNIX socket # Adapted from uhttplib class UnixHTTPConnection(httplib.HTTPConnection): def __init__(self, path, host="localhost", **kwargs): # Can't use super() as httplib.HTTPConnection is not new-style httplib.HTTPConnection.__init__(self, host, **kwargs) self.path = path def connect(self): sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) sock.connect(self.path) self.sock = sock # XXX Move this into library! # Base class for our plugins class Plugin(object): # a unique textkey to identify this plugin textkey = "undefined" # One-line human-readable description of the plugin description = "" log = logging def __init__(self, schedule): self.schedule = schedule self.log = logging.getLogger("plugin %r" % self.textkey) # saves some check data in a temporary location in the db, for use by a # future call, for figuring things like N per second. def cache_result(self, textkey, option, value, replace=False): now = time.time() cache = self.schedule.cached_results tcache = cache.setdefault(textkey, {}) if replace: tcache[option] = [] results = tcache.setdefault(option, []) results.append((now, value)) # don't let our data structure get too big. this number is arbitrary. # we could use a collections.deque, but its maxlen property is not # supported before 2.5 while len(results) > 1000: results.pop(0) # fetches some cached data from a previous check call. # arg is passed in because each call to check receives a different # arg (if that resource textkey has multiple args), so the cached results # are specific to that arg. def get_cache_results(self, textkey, option, num=1): now = time.time() cache = self.schedule.cached_results tcache = cache.setdefault(textkey, {}) results = tcache.setdefault(option, []) ret = [] for stored, result in results[-num:]: ret.append((now - stored, result)) ret.reverse() return ret def get_metadata(self, config): return {} def check(self, textkey, data, config): return 0