nagixsc/__init__.py

   1 import BaseHTTPServer
   2 import ConfigParser
   3 import SocketServer
   4 import base64
   5 import datetime
   6 import libxml2
   7 import mimetools
   8 import os
   9 import random
  10 import shlex
  11 import socket
  12 import string
  13 import subprocess
  14 import sys
  15
  16 def debug(level, verb, string):
  17         if level <= verb:
  18                 print "%s: %s" % (level, string)
  19
  20
  21 ##############################################################################
  22
  23 def available_encodings():
  24         return ['base64', 'plain',]
  25
  26
  27 def check_encoding(enc):
  28         if enc in available_encodings():
  29                 return True
  30         else:
  31                 return False
  32
  33
  34 def decode(data, encoding):
  35         if encoding == 'plain':
  36                 return data
  37         else:
  38                 return base64.b64decode(data)
  39
  40
  41 def encode(data, encoding=None):
  42         if encoding == 'plain':
  43                 return data
  44         else:
  45                 return base64.b64encode(data)
  46
  47
  48 ##############################################################################
  49
  50 def read_inifile(inifile):
  51         config = ConfigParser.RawConfigParser()
  52         config.optionxform = str # We need case-sensitive options
  53         ini_list = config.read(inifile)
  54
  55         if ini_list:
  56                 return config
  57         else:
  58                 return False
  59
  60
  61 ##############################################################################
  62
  63 def exec_check(host_name, service_descr, cmdline):
  64         cmdarray = shlex.split(cmdline)
  65
  66         check = {}
  67         check['host_name'] = host_name
  68         check['service_description'] = service_descr
  69
  70         if len(cmdarray) == 0:
  71                 check['output'] = 'No command line specified!'
  72                 check['returncode'] = 127
  73                 return check
  74
  75         try:
  76                 cmd     = subprocess.Popen(cmdarray, stdout=subprocess.PIPE)
  77                 check['output'] = cmd.communicate()[0].rstrip()
  78                 check['returncode'] = cmd.returncode
  79         except OSError:
  80                 check['output'] = 'Could not execute "%s"' % cmdline
  81                 check['returncode'] = 127
  82
  83         check['timestamp'] = datetime.datetime.now().strftime('%s')
  84         return check
  85
  86
  87 ##############################################################################
  88
  89 def conf2dict(config, opt_host=None, opt_service=None):
  90         checks = []
  91
  92         # Sections are Hosts (not 'nagixsc'), options in sections are Services
  93         hosts = config.sections()
  94         if 'nagixsc' in hosts:
  95                 hosts.remove('nagixsc')
  96
  97         # Filter out host/section if it exists
  98         if opt_host:
  99                 if opt_host in hosts:
 100                         hosts = [opt_host,]
 101                 else:
 102                         hosts = []
 103
 104         for host in hosts:
 105                 # Overwrite section/host name with '_host_name'
 106                 if config.has_option(host,'_host_name'):
 107                         host_name = config.get(host,'_host_name')
 108                 else:
 109                         host_name = host
 110
 111
 112                 services = config.options(host)
 113                 # Look for host check
 114                 if '_host_check' in services and not opt_service:
 115                         cmdline = config.get(host, '_host_check')
 116                         check = exec_check(host_name, None, cmdline)
 117                         checks.append(check)
 118
 119
 120                 # Filter out service if given in cmd line options
 121                 if opt_service:
 122                         if opt_service in services:
 123                                 services = [opt_service,]
 124                         else:
 125                                 services = []
 126
 127                 for service in services:
 128                         # If option starts with '_' it may be a NagixSC option in the future
 129                         if service[0] != '_':
 130                                 cmdline = config.get(host, service)
 131
 132                                 check = exec_check(host_name, service, cmdline)
 133                                 checks.append(check)
 134
 135         return checks
 136
 137
 138 ##############################################################################
 139
 140 def dict2out_passive(checks, xmltimestamp, opt_pipe, opt_verb=0):
 141         FORMAT_HOST = '[%s] PROCESS_HOST_CHECK_RESULT;%s;%s;%s'
 142         FORMAT_SERVICE = '[%s] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%s;%s'
 143         count_services = 0
 144         now = datetime.datetime.now().strftime('%s')
 145
 146         # Prepare
 147         if opt_verb <= 2:
 148                 pipe = open(opt_pipe, "w")
 149         else:
 150                 pipe = None
 151
 152         # Output
 153         for check in checks:
 154                 count_services += 1
 155                 if check.has_key('timestamp'):
 156                         timestamp = check['timestamp']
 157                 else:
 158                         timestamp = xmltimestamp
 159                 count_services += 1
 160
 161                 if check['service_description'] == None or check['service_description'] == '':
 162                         # Host check
 163                         line = FORMAT_HOST % (now, check['host_name'], check['returncode'], check['output'].replace('\n', '\\n'))
 164                 else:
 165                         # Service check
 166                         line =  FORMAT_SERVICE % (now, check['host_name'], check['service_description'], check['returncode'], check['output'].replace('\n', '\\n'))
 167
 168                 if pipe:
 169                         pipe.write(line + '\n')
 170                 debug(2, opt_verb, line)
 171
 172         # Close
 173         if pipe:
 174                 pipe.close()
 175         else:
 176                 print "Passive check results NOT written to Nagios pipe due to -vvv!"
 177
 178         return count_services
 179
 180
 181 def dict2out_checkresult(checks, xmltimestamp, opt_checkresultdir, opt_verb):
 182         count_services = 0
 183         count_failed = 0
 184         list_failed = []
 185         chars = string.letters + string.digits
 186         ctimestamp = datetime.datetime.now().ctime()
 187
 188         for check in checks:
 189                 count_services += 1
 190                 if check.has_key('timestamp'):
 191                         timestamp = check['timestamp']
 192                 else:
 193                         timestamp = xmltimestamp
 194
 195                 filename = os.path.join(opt_checkresultdir, 'c' + ''.join([random.choice(chars) for i in range(6)]))
 196                 try:
 197                         crfile = open(filename, "w")
 198                         if check['service_description'] == None or check['service_description'] == '':
 199                                 # Host check
 200                                 crfile.write('### Active Check Result File ###\nfile_time=%s\n\n### Nagios Service Check Result ###\n# Time: %s\nhost_name=%s\ncheck_type=0\ncheck_options=0\nscheduled_check=1\nreschedule_check=1\nlatency=0.0\nstart_time=%s.00\nfinish_time=%s.05\nearly_timeout=0\nexited_ok=1\nreturn_code=%s\noutput=%s\n' % (timestamp, ctimestamp, check['host_name'], timestamp, timestamp, check['returncode'], check['output'].replace('\n', '\\n') ) )
 201                         else:
 202                                 # Service check
 203                                 crfile.write('### Active Check Result File ###\nfile_time=%s\n\n### Nagios Service Check Result ###\n# Time: %s\nhost_name=%s\nservice_description=%s\ncheck_type=0\ncheck_options=0\nscheduled_check=1\nreschedule_check=1\nlatency=0.0\nstart_time=%s.00\nfinish_time=%s.05\nearly_timeout=0\nexited_ok=1\nreturn_code=%s\noutput=%s\n' % (timestamp, ctimestamp, check['host_name'], check['service_description'], timestamp, timestamp, check['returncode'], check['output'].replace('\n', '\\n') ) )
 204                         crfile.close()
 205
 206                         # Create OK file
 207                         open(filename + '.ok', 'w').close()
 208                 except:
 209                         count_failed += 1
 210                         list_failed.append([filename, check['host_name'], check['service_description']])
 211
 212         return (count_services, count_failed, list_failed)
 213
 214
 215 ##############################################################################
 216
 217 def read_xml(options):
 218         if options.url != None:
 219                 import urllib2
 220
 221                 if options.httpuser and options.httppasswd:
 222                         passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
 223                         passman.add_password(None, options.url, options.httpuser, options.httppasswd)
 224                         authhandler = urllib2.HTTPBasicAuthHandler(passman)
 225                         opener = urllib2.build_opener(authhandler)
 226                         urllib2.install_opener(opener)
 227
 228                 try:
 229                         response = urllib2.urlopen(options.url)
 230                 except urllib2.HTTPError, error:
 231                         print error
 232                         sys.exit(0)
 233                 except urllib2.URLError, error:
 234                         print error.reason[1]
 235                         sys.exit(0)
 236
 237                 doc = libxml2.parseDoc(response.read())
 238                 response.close()
 239
 240         else:
 241                 doc = libxml2.parseFile(options.file)
 242
 243         return doc
 244
 245
 246 def read_xml_from_string(content):
 247         return libxml2.parseDoc(content)
 248
 249
 250 ##############################################################################
 251
 252 def xml_check_version(xmldoc):
 253         # FIXME: Check XML structure
 254         try:
 255                 xmlnagixsc = xmldoc.xpathNewContext().xpathEval('/nagixsc')[0]
 256         except:
 257                 return (False, 'Not a Nag(IX)SC XML file!')
 258
 259         try:
 260                 if xmlnagixsc.prop('version') != "1.0":
 261                         return (False, 'Wrong version (found "%s", need "1.0") of XML file!' % xmlnagixsc.prop('version'))
 262         except:
 263                 return (False, 'No version information found in XML file!')
 264
 265         return (True, 'XML seems to be ok')
 266
 267
 268 def xml_get_timestamp(xmldoc):
 269         try:
 270                 timestamp = int(xmldoc.xpathNewContext().xpathEval('/nagixsc/timestamp')[0].get_content())
 271         except:
 272                 return False
 273
 274         return timestamp
 275
 276
 277 def xml_to_dict(xmldoc, verb=0, hostfilter=None, servicefilter=None):
 278         checks = []
 279         now = int(datetime.datetime.now().strftime('%s'))
 280         filetimestamp = reset_future_timestamp(xml_get_timestamp(xmldoc), now)
 281
 282         if hostfilter:
 283                 hosts = xmldoc.xpathNewContext().xpathEval('/nagixsc/host[name="%s"] | /nagixsc/host[name="%s"]' % (hostfilter, encode(hostfilter)))
 284         else:
 285                 hosts = xmldoc.xpathNewContext().xpathEval('/nagixsc/host')
 286
 287         for host in hosts:
 288                 xmlhostname = host.xpathEval('name')[0]
 289                 hostname = decode(xmlhostname.get_content(), xmlhostname.prop('encoding'))
 290                 debug(2, verb, 'Found host "%s"' % hostname)
 291
 292                 # Look for Host check result
 293                 if host.xpathEval('returncode'):
 294                         retcode   = host.xpathEval('returncode')[0].get_content()
 295                 else:
 296                         retcode   = None
 297
 298                 if host.xpathEval('output'):
 299                         xmloutput = host.xpathEval('output')[0]
 300                         output    = decode(xmloutput.get_content(), xmloutput.prop('encoding')).rstrip()
 301                 else:
 302                         output    = None
 303
 304                 if host.xpathEval('timestamp'):
 305                         timestamp = reset_future_timestamp(int(host.xpathEval('timestamp')[0].get_content()), now)
 306                 else:
 307                         timestamp = filetimestamp
 308
 309                 if retcode and output:
 310                         checks.append({'host_name':hostname, 'service_description':None, 'returncode':retcode, 'output':output, 'timestamp':timestamp})
 311
 312
 313                 # Look for service filter
 314                 if servicefilter:
 315                         services = host.xpathEval('service[description="%s"] | service[description="%s"]' % (servicefilter, encode(servicefilter)))
 316                 else:
 317                         services = host.xpathEval('service')
 318
 319                 # Loop over services in host
 320                 for service in services:
 321                         service_dict = {}
 322
 323                         xmldescr  = service.xpathEval('description')[0]
 324                         xmloutput = service.xpathEval('output')[0]
 325
 326                         srvdescr = decode(xmldescr.get_content(), xmldescr.prop('encoding'))
 327                         retcode  = service.xpathEval('returncode')[0].get_content()
 328                         output   = decode(xmloutput.get_content(), xmloutput.prop('encoding')).rstrip()
 329
 330                         try:
 331                                 timestamp = reset_future_timestamp(int(service.xpathEval('timestamp')[0].get_content()), now)
 332                         except:
 333                                 timestamp = filetimestamp
 334
 335                         debug(2, verb, 'Found service "%s"' % srvdescr)
 336
 337                         service_dict = {'host_name':hostname, 'service_description':srvdescr, 'returncode':retcode, 'output':output, 'timestamp':timestamp}
 338                         checks.append(service_dict)
 339
 340                         debug(1, verb, 'Host: "%s" - Service: "%s" - RetCode: "%s" - Output: "%s"' % (hostname, srvdescr, retcode, output) )
 341
 342         return checks
 343
 344
 345 def xml_from_dict(checks, encoding='base64'):
 346         lasthost = None
 347
 348         db = [(check['host_name'], check) for check in checks]
 349         db.sort()
 350
 351         xmldoc = libxml2.newDoc('1.0')
 352         xmlroot = xmldoc.newChild(None, 'nagixsc', None)
 353         xmlroot.setProp('version', '1.0')
 354         xmltimestamp = xmlroot.newChild(None, 'timestamp', datetime.datetime.now().strftime('%s'))
 355
 356         for entry in db:
 357                 check = entry[1]
 358
 359                 if check['host_name'] != lasthost:
 360                         xmlhost = xmlroot.newChild(None, 'host', None)
 361                         xmlhostname = xmlhost.newChild(None, 'name', encode(check['host_name'], encoding))
 362                         lasthost = check['host_name']
 363
 364                 if check['service_description'] == '' or check['service_description'] == None:
 365                         # Host check result
 366                         xmlreturncode = xmlhost.newChild(None, 'returncode', str(check['returncode']))
 367                         xmloutput     = xmlhost.newChild(None, 'output', encode(check['output'], encoding))
 368                         xmloutput.setProp('encoding', encoding)
 369                         if check.has_key('timestamp'):
 370                                 xmltimestamp  = xmlhost.newChild(None, 'timestamp', str(check['timestamp']))
 371                 else:
 372                         # Service check result
 373                         xmlservice    = xmlhost.newChild(None, 'service', None)
 374                         xmlname       = xmlservice.newChild(None, 'description', encode(check['service_description'], encoding))
 375                         xmlname.setProp('encoding', encoding)
 376                         xmlreturncode = xmlservice.newChild(None, 'returncode', str(check['returncode']))
 377                         xmloutput     = xmlservice.newChild(None, 'output', encode(check['output'], encoding))
 378                         xmloutput.setProp('encoding', encoding)
 379                         if check.has_key('timestamp'):
 380                                 xmltimestamp  = xmlservice.newChild(None, 'timestamp', str(check['timestamp']))
 381
 382         return xmldoc
 383
 384
 385 def check_mark_outdated(check, now, maxtimediff, markold):
 386         timedelta = now - check['timestamp']
 387         if timedelta > maxtimediff:
 388                 check['output'] = 'Nag(ix)SC: Check result is %s(>%s) seconds old - %s' % (timedelta, maxtimediff, check['output'])
 389                 if markold:
 390                         check['returncode'] = 3
 391         return check
 392
 393
 394 def reset_future_timestamp(timestamp, now):
 395         if timestamp <= now:
 396                 return timestamp
 397         else:
 398                 return now
 399
 400 ##############################################################################
 401
 402 def encode_multipart(xmldoc, httpuser, httppasswd):
 403         BOUNDARY = mimetools.choose_boundary()
 404         CRLF = '\r\n'
 405         L = []
 406         L.append('--' + BOUNDARY)
 407         L.append('Content-Disposition: form-data; name="xmlfile"; filename="xmlfile"')
 408         L.append('Content-Type: application/xml')
 409         L.append('')
 410         L.append(xmldoc.serialize())
 411         L.append('--' + BOUNDARY + '--')
 412         L.append('')
 413         body = CRLF.join(L)
 414         content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
 415         headers = {'Content-Type': content_type, 'Content-Length': str(len(body))}
 416
 417         if httpuser and httppasswd:
 418                 headers['Authorization'] = 'Basic %s' % base64.b64encode(':'.join([httpuser, httppasswd]))
 419
 420         return (headers, body)
 421
 422 ##############################################################################
 423
 424 def daemonize(pidfile=None, stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):
 425         # 1st fork
 426         try:
 427                 pid = os.fork()
 428                 if pid > 0:
 429                         sys.exit(0)
 430         except OSError, e:
 431                 sys.stderr.write("1st fork failed: (%d) %sn" % (e.errno, e.strerror))
 432                 sys.exit(1)
 433         # Prepare 2nd fork
 434         os.chdir("/")
 435         os.umask(0)
 436         os.setsid( )
 437         # 2nd fork
 438         try:
 439                 pid = os.fork()
 440                 if pid > 0:
 441                         sys.exit(0)
 442         except OSError, e:
 443                 sys.stderr.write("2nd fork failed: (%d) %sn" % (e.errno, e.strerror))
 444                 sys.exit(1)
 445         # Redirect stdin, stdout, stderr
 446         sys.stdout.flush()
 447         sys.stderr.flush()
 448         si = file(stdin, 'r')
 449         so = file(stdout, 'a+')
 450         se = file(stderr, 'a+', 0)
 451         os.dup2(si.fileno(), sys.stdin.fileno())
 452         os.dup2(so.fileno(), sys.stdout.fileno())
 453         os.dup2(se.fileno(), sys.stderr.fileno())
 454
 455         if pidfile:
 456                 pid = str(os.getpid())
 457                 file(pidfile, 'w+').write('%s\n' % pid)
 458
 459         return
 460
 461 ##############################################################################
 462
 463 class MyHTTPServer(BaseHTTPServer.HTTPServer):
 464         def __init__(self, server_address, HandlerClass, ssl=False, sslpemfile=None):
 465                 if ssl:
 466                         # FIXME: SSL is in Py2.6
 467                         try:
 468                                 from OpenSSL import SSL
 469                         except:
 470                                 print 'No Python OpenSSL wrapper/bindings found!'
 471                                 sys.exit(127)
 472
 473                         SocketServer.BaseServer.__init__(self, server_address, HandlerClass)
 474                         context = SSL.Context(SSL.SSLv23_METHOD)
 475                         context.use_privatekey_file (sslpemfile)
 476                         context.use_certificate_file(sslpemfile)
 477                         self.socket = SSL.Connection(context, socket.socket(self.address_family, self.socket_type))
 478                 else:
 479                         SocketServer.BaseServer.__init__(self, server_address, HandlerClass)
 480                         self.socket = socket.socket(self.address_family, self.socket_type)
 481
 482                 self.server_bind()
 483                 self.server_activate()
 484
 485
 486 class MyHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
 487         def setup(self):
 488                 self.connection = self.request
 489                 self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)
 490                 self.wfile = socket._fileobject(self.request, "wb", self.wbufsize)
 491
 492 ##############################################################################
 493