diff options
Diffstat (limited to 'puppet/modules/site_check_mk/files/agent/plugins/mk_logwatch.1.2.4')
| -rwxr-xr-x | puppet/modules/site_check_mk/files/agent/plugins/mk_logwatch.1.2.4 | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/puppet/modules/site_check_mk/files/agent/plugins/mk_logwatch.1.2.4 b/puppet/modules/site_check_mk/files/agent/plugins/mk_logwatch.1.2.4 new file mode 100755 index 00000000..3dbca322 --- /dev/null +++ b/puppet/modules/site_check_mk/files/agent/plugins/mk_logwatch.1.2.4 @@ -0,0 +1,374 @@ +#!/usr/bin/python +# -*- encoding: utf-8; py-indent-offset: 4 -*- +# +------------------------------------------------------------------+ +# | ____ _ _ __ __ _ __ | +# | / ___| |__ ___ ___| | __ | \/ | |/ / | +# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / | +# | | |___| | | | __/ (__| < | | | | . \ | +# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ | +# | | +# | Copyright Mathias Kettner 2010 mk@mathias-kettner.de | +# +------------------------------------------------------------------+ +# +# This file is part of Check_MK. +# The official homepage is at http://mathias-kettner.de/check_mk. +# +# check_mk is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation in version 2. check_mk is distributed +# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with- +# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. See the GNU General Public License for more de- +# ails. You should have received a copy of the GNU General Public +# License along with GNU Make; see the file COPYING. If not, write +# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, +# Boston, MA 02110-1301 USA. + +# Call with -d for debug mode: colored output, no saving of status + +import sys, os, re, time +import glob + +if '-d' in sys.argv[1:] or '--debug' in sys.argv[1:]: + tty_red = '\033[1;31m' + tty_green = '\033[1;32m' + tty_yellow = '\033[1;33m' + tty_blue = '\033[1;34m' + tty_normal = '\033[0m' + debug = True +else: + tty_red = '' + tty_green = '' + tty_yellow = '' + tty_blue = '' + tty_normal = '' + debug = False + +# The configuration file and status file are searched +# in the directory named by the environment variable +# LOGWATCH_DIR. If that is not set, MK_CONFDIR is used. +# If that is not set either, the current directory ist +# used. +logwatch_dir = os.getenv("LOGWATCH_DIR") +if not logwatch_dir: + logwatch_dir = os.getenv("MK_CONFDIR") + if not logwatch_dir: + logwatch_dir = "." + +print "<<<logwatch>>>" + +config_filename = logwatch_dir + "/logwatch.cfg" +status_filename = logwatch_dir + "/logwatch.state" +config_dir = logwatch_dir + "/logwatch.d/*.cfg" + +def is_not_comment(line): + if line.lstrip().startswith('#') or \ + line.strip() == '': + return False + return True + +def parse_filenames(line): + return line.split() + +def parse_pattern(level, pattern): + if level not in [ 'C', 'W', 'I', 'O' ]: + raise(Exception("Invalid pattern line '%s'" % line)) + try: + compiled = re.compile(pattern) + except: + raise(Exception("Invalid regular expression in line '%s'" % line)) + return (level, compiled) + +def read_config(): + config_lines = [ line.rstrip() for line in filter(is_not_comment, file(config_filename).readlines()) ] + # Add config from a logwatch.d folder + for config_file in glob.glob(config_dir): + config_lines += [ line.rstrip() for line in filter(is_not_comment, file(config_file).readlines()) ] + + have_filenames = False + config = [] + + for line in config_lines: + rewrite = False + if line[0].isspace(): # pattern line + if not have_filenames: + raise Exception("Missing logfile names") + level, pattern = line.split(None, 1) + if level == 'A': + cont_list.append(parse_cont_pattern(pattern)) + elif level == 'R': + rewrite_list.append(pattern) + else: + level, compiled = parse_pattern(level, pattern) + cont_list = [] # List of continuation patterns + rewrite_list = [] # List of rewrite patterns + patterns.append((level, compiled, cont_list, rewrite_list)) + else: # filename line + patterns = [] + config.append((parse_filenames(line), patterns)) + have_filenames = True + return config + +def parse_cont_pattern(pattern): + try: + return int(pattern) + except: + try: + return re.compile(pattern) + except: + if debug: + raise + raise Exception("Invalid regular expression in line '%s'" % pattern) + +# structure of statusfile +# # LOGFILE OFFSET INODE +# /var/log/messages|7767698|32455445 +# /var/test/x12134.log|12345|32444355 +def read_status(): + if debug: + return {} + + status = {} + for line in file(status_filename): + # TODO: Remove variants with spaces. rsplit is + # not portable. split fails if logfilename contains + # spaces + inode = -1 + try: + parts = line.split('|') + filename = parts[0] + offset = parts[1] + if len(parts) >= 3: + inode = parts[2] + + except: + try: + filename, offset = line.rsplit(None, 1) + except: + filename, offset = line.split(None, 1) + status[filename] = int(offset), int(inode) + return status + +def save_status(status): + f = file(status_filename, "w") + for filename, (offset, inode) in status.items(): + f.write("%s|%d|%d\n" % (filename, offset, inode)) + +pushed_back_line = None +def next_line(f): + global pushed_back_line + if pushed_back_line != None: + line = pushed_back_line + pushed_back_line = None + return line + else: + try: + line = f.next() + return line + except: + return None + + +def process_logfile(logfile, patterns): + global pushed_back_line + + # Look at which file offset we have finished scanning + # the logfile last time. If we have never seen this file + # before, we set the offset to -1 + offset, prev_inode = status.get(logfile, (-1, -1)) + try: + fl = os.open(logfile, os.O_RDONLY) + inode = os.fstat(fl)[1] # 1 = st_ino + except: + if debug: + raise + print "[[[%s:cannotopen]]]" % logfile + return + + print "[[[%s]]]" % logfile + + # Seek to the current end in order to determine file size + current_end = os.lseek(fl, 0, 2) # os.SEEK_END not available in Python 2.4 + status[logfile] = current_end, inode + + # If we have never seen this file before, we just set the + # current pointer to the file end. We do not want to make + # a fuss about ancient log messages... + if offset == -1: + if not debug: + return + else: + offset = 0 + + + # If the inode of the logfile has changed it has appearently + # been started from new (logfile rotation). At least we must + # assume that. In some rare cases (restore of a backup, etc) + # we are wrong and resend old log messages + if prev_inode >= 0 and inode != prev_inode: + offset = 0 + + # Our previously stored offset is the current end -> + # no new lines in this file + if offset == current_end: + return # nothing new + + # If our offset is beyond the current end, the logfile has been + # truncated or wrapped while keeping the same inode. We assume + # that it contains all new data in that case and restart from + # offset 0. + if offset > current_end: + offset = 0 + + # now seek to offset where interesting data begins + os.lseek(fl, offset, 0) # os.SEEK_SET not available in Python 2.4 + f = os.fdopen(fl) + worst = -1 + outputtxt = "" + lines_parsed = 0 + start_time = time.time() + + while True: + line = next_line(f) + if line == None: + break # End of file + + lines_parsed += 1 + # Check if maximum number of new log messages is exceeded + if opt_maxlines != None and lines_parsed > opt_maxlines: + outputtxt += "%s Maximum number (%d) of new log messages exceeded.\n" % ( + opt_overflow, opt_maxlines) + worst = max(worst, opt_overflow_level) + os.lseek(fl, 0, 2) # Seek to end of file, skip all other messages + break + + # Check if maximum processing time (per file) is exceeded. Check only + # every 100'th line in order to save system calls + if opt_maxtime != None and lines_parsed % 100 == 10 \ + and time.time() - start_time > opt_maxtime: + outputtxt += "%s Maximum parsing time (%.1f sec) of this log file exceeded.\n" % ( + opt_overflow, opt_maxtime) + worst = max(worst, opt_overflow_level) + os.lseek(fl, 0, 2) # Seek to end of file, skip all other messages + break + + level = "." + for lev, pattern, cont_patterns, replacements in patterns: + matches = pattern.search(line[:-1]) + if matches: + level = lev + levelint = {'C': 2, 'W': 1, 'O': 0, 'I': -1, '.': -1}[lev] + worst = max(levelint, worst) + + # Check for continuation lines + for cont_pattern in cont_patterns: + if type(cont_pattern) == int: # add that many lines + for x in range(cont_pattern): + cont_line = next_line(f) + if cont_line == None: # end of file + break + line = line[:-1] + "\1" + cont_line + + else: # pattern is regex + while True: + cont_line = next_line(f) + if cont_line == None: # end of file + break + elif cont_pattern.search(cont_line[:-1]): + line = line[:-1] + "\1" + cont_line + else: + pushed_back_line = cont_line # sorry for stealing this line + break + + # Replacement + for replace in replacements: + line = replace.replace('\\0', line) + "\n" + for nr, group in enumerate(matches.groups()): + line = line.replace('\\%d' % (nr+1), group) + + break # matching rule found and executed + + color = {'C': tty_red, 'W': tty_yellow, 'O': tty_green, 'I': tty_blue, '.': ''}[level] + if debug: + line = line.replace("\1", "\nCONT:") + if level == "I": + level = "." + if opt_nocontext and level == '.': + continue + outputtxt += "%s%s %s%s\n" % (color, level, line[:-1], tty_normal) + + new_offset = os.lseek(fl, 0, 1) # os.SEEK_CUR not available in Python 2.4 + status[logfile] = new_offset, inode + + # output all lines if at least one warning, error or ok has been found + if worst > -1: + sys.stdout.write(outputtxt) + sys.stdout.flush() + +try: + config = read_config() +except Exception, e: + if debug: + raise + print "CANNOT READ CONFIG FILE: %s" % e + sys.exit(1) + +# Simply ignore errors in the status file. In case of a corrupted status file we simply begin +# with an empty status. That keeps the monitoring up and running - even if we might loose a +# message in the extreme case of a corrupted status file. +try: + status = read_status() +except Exception, e: + status = {} + + +# The filename line may contain options like 'maxlines=100' or 'maxtime=10' +for filenames, patterns in config: + # Initialize options with default values + opt_maxlines = None + opt_maxtime = None + opt_regex = None + opt_overflow = 'C' + opt_overflow_level = 2 + opt_nocontext = False + try: + options = [ o.split('=', 1) for o in filenames if '=' in o ] + for key, value in options: + if key == 'maxlines': + opt_maxlines = int(value) + elif key == 'maxtime': + opt_maxtime = float(value) + elif key == 'overflow': + if value not in [ 'C', 'I', 'W', 'O' ]: + raise Exception("Invalid value %s for overflow. Allowed are C, I, O and W" % value) + opt_overflow = value + opt_overflow_level = {'C':2, 'W':1, 'O':0, 'I':0}[value] + elif key == 'regex': + opt_regex = re.compile(value) + elif key == 'iregex': + opt_regex = re.compile(value, re.I) + elif key == 'nocontext': + opt_nocontext = True + else: + raise Exception("Invalid option %s" % key) + except Exception, e: + if debug: + raise + print "INVALID CONFIGURATION: %s" % e + sys.exit(1) + + + for glob in filenames: + if '=' in glob: + continue + logfiles = [ l.strip() for l in os.popen("ls %s 2>/dev/null" % glob).readlines() ] + if opt_regex: + logfiles = [ f for f in logfiles if opt_regex.search(f) ] + if len(logfiles) == 0: + print '[[[%s:missing]]]' % glob + else: + for logfile in logfiles: + process_logfile(logfile, patterns) + +if not debug: + save_status(status) |