class Nagios(object):
key = "Nagios"
def __init__(self, hostname):
"""hostname is the name of the machine where the nagios log lives
"""
# Regex alternation ends up being tricker than expected, and much less readable
#self.re_line = re.compile('^\[(\d+)\] (?:EXTERNAL COMMAND: (\w+);)|(?:([^:]+): )(.*)$')
self.re_line_reg = re.compile(
'^\[(\d+)\] EXTERNAL COMMAND: (\w+);(.*)$')
self.re_line_ext = re.compile('^\[(\d+)\] ([^:]+): (.*)$')
self.logger = None
self.gen = None
self.tail = None
self.events = None
self.apikey = ""
self.hostname = hostname
self._line_parsed = 0
def _parse_line(self, line):
"""Actual nagios parsing
Return True if we found an event, False otherwise
"""
# first isolate the timestamp and the event type
try:
self._line_parsed = self._line_parsed + 1
m = self.re_line_reg.match(line)
if m is None:
m = self.re_line_ext.match(line)
if m is None:
return False
(tstamp, event_type, remainder) = m.groups()
tstamp = int(tstamp)
if event_type in IGNORE_EVENT_TYPES:
self.logger.info("Ignoring nagios event of type %s" %
(event_type))
return False
# then retrieve the event format for each specific event type
fields = EVENT_FIELDS.get(event_type, None)
if fields is None:
self.logger.warn("Ignoring unkown nagios event for line: %s" %
(line[:-1]))
return False
# and parse the rest of the line
parts = map(lambda p: p.strip(), remainder.split(';'))
# Chop parts we don't recognize
parts = parts[:len(fields._fields)]
event = create_event(tstamp, event_type, self.hostname,
fields._make(parts))
event.update({'api_key': self.apikey})
self.events.append(event)
self.logger.debug("Nagios event: %s" % (event))
return True
except Exception:
self.logger.exception(
"Unable to create a nagios event from line: [%s]" % (line))
return False
def check(self, logger, agentConfig, move_end=True):
self.logger = logger
# Check arguments
log_path = agentConfig.get('nagios_log', None)
if log_path is None:
self.logger.debug(
"Not checking nagios because nagios_log is not set in config file"
)
return False
self.apikey = agentConfig['api_key']
self.events = []
self._line_parsed = 0
# Build our tail -f
if self.gen is None:
self.tail = TailFile(logger, log_path, self._parse_line)
self.gen = self.tail.tail(line_by_line=False, move_end=move_end)
# read until the end of file
try:
self.logger.debug("Start nagios check for file %s" % (log_path))
self.tail._log = self.logger
self.gen.next()
self.logger.debug(
"Done nagios check for file %s (parsed %s line(s), generated %s event(s))"
% (log_path, self._line_parsed, len(self.events)))
except StopIteration, e:
self.logger.exception(e)
self.logger.warn("Can't tail %s file" % (log_path))
return self.events
class Nagios(object):
key = "Nagios"
def __init__(self, hostname):
"""hostname is the name of the machine where the nagios log lives
"""
# Regex alternation ends up being tricker than expected, and much less readable
#self.re_line = re.compile('^\[(\d+)\] (?:EXTERNAL COMMAND: (\w+);)|(?:([^:]+): )(.*)$')
self.re_line_reg = re.compile('^\[(\d+)\] EXTERNAL COMMAND: (\w+);(.*)$')
self.re_line_ext = re.compile('^\[(\d+)\] ([^:]+): (.*)$')
self.logger = None
self.gen = None
self.tail = None
self.events = None
self.apikey = ""
self.hostname = hostname
self._line_parsed = 0
def _parse_line(self, line):
"""Actual nagios parsing
Return True if we found an event, False otherwise
"""
# first isolate the timestamp and the event type
try:
self._line_parsed = self._line_parsed + 1
m = self.re_line_reg.match(line)
if m is None:
m = self.re_line_ext.match(line)
if m is None:
return False
(tstamp, event_type, remainder) = m.groups()
tstamp = int(tstamp)
if event_type in IGNORE_EVENT_TYPES:
self.logger.info("Ignoring nagios event of type %s" % (event_type))
return False
# then retrieve the event format for each specific event type
fields = EVENT_FIELDS.get(event_type, None)
if fields is None:
self.logger.warn("Ignoring unkown nagios event for line: %s" % (line[:-1]))
return False
# and parse the rest of the line
parts = map(lambda p: p.strip(), remainder.split(';'))
# Chop parts we don't recognize
parts = parts[:len(fields._fields)]
event = create_event(tstamp, event_type, self.hostname, fields._make(parts))
event.update({'api_key': self.apikey})
self.events.append(event)
self.logger.debug("Nagios event: %s" % (event))
return True
except Exception:
self.logger.exception("Unable to create a nagios event from line: [%s]" % (line))
return False
def check(self, logger, agentConfig, move_end=True):
self.logger = logger
# Check arguments
log_path = agentConfig.get('nagios_log',None)
if log_path is None:
self.logger.debug("Not checking nagios because nagios_log is not set in config file")
return False
self.apikey = agentConfig['api_key']
self.events = []
self._line_parsed = 0
# Build our tail -f
if self.gen is None:
self.tail = TailFile(logger,log_path,self._parse_line)
self.gen = self.tail.tail(line_by_line=False, move_end=move_end)
# read until the end of file
try:
self.logger.debug("Start nagios check for file %s" % (log_path))
self.tail._log = self.logger
self.gen.next()
self.logger.debug("Done nagios check for file %s (parsed %s line(s), generated %s event(s))" %
(log_path,self._line_parsed,len(self.events)))
except StopIteration, e:
self.logger.exception(e)
self.logger.warn("Can't tail %s file" % (log_path))
return self.events
