checks/ucd_hr.include

   1 #!/usr/bin/python
   2 # -*- encoding: utf-8; py-indent-offset: 4 -*-
   3 # +------------------------------------------------------------------+
   4 # |             ____ _               _        __  __ _  __           |
   5 # |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
   6 # |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
   7 # |           | |___| | | |  __/ (__|   <    | |  | | . \            |
   8 # |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
   9 # |                                                                  |
  10 # | Copyright Mathias Kettner 2015             mk@mathias-kettner.de |
  11 # +------------------------------------------------------------------+
  12 #
  13 # This file is part of Check_MK.
  14 # The official homepage is at http://mathias-kettner.de/check_mk.
  15 #
  16 # check_mk is free software;  you can redistribute it and/or modify it
  17 # under the  terms of the  GNU General Public License  as published by
  18 # the Free Software Foundation in version 2.  check_mk is  distributed
  19 # in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
  20 # out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
  21 # PARTICULAR PURPOSE. See the  GNU General Public License for more de-
  22 # tails. You should have  received  a copy of the  GNU  General Public
  23 # License along with GNU Make; see the file  COPYING.  If  not,  write
  24 # to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
  25 # Boston, MA 02110-1301 USA.
  26
  27 # We are not sure how to safely detect the UCD SNMP Daemon. We know that
  28 # it is mainly used on Linux, but not only. But fetching and OID outside
  29 # of the info area for scanning is not a good idea. It will slow down
  30 # scans for *all* hosts.
  31
  32 #   ---ucd cpu load---------------------------------------------------------
  33
  34 # We prefer HOST-RESOURCES-MIB implementation but not in case
  35 # of check 'ucd_cpu_load' because the HR-MIB has not data
  36 # about cpu load
  37
  38
  39 def is_ucd(oid):
  40     return _is_ucd(oid)
  41
  42
  43 #   ---general ucd/hr-------------------------------------------------------
  44
  45
  46 def is_hr(oid):
  47     return bool(oid('.1.3.6.1.2.1.25.1.1.0'))
  48
  49
  50 def prefer_hr_else_ucd(oid):
  51     return _is_ucd(oid) and not oid(".1.3.6.1.2.1.25.1.1.0")
  52
  53
  54 #   ---memory---------------------------------------------------------------
  55
  56
  57 def is_ucd_mem(oid):
  58     # Avoid inverting output of a function in a check plugin and be
  59     # descriptive about what a function is actually doing
  60     if _ignore_both(oid):
  61         return False
  62     return _is_ucd_mem(oid)
  63
  64
  65 def is_hr_mem(oid):
  66     # We prefer HOST-RESOURCES-MIB implementation but not in case
  67     # of devices, which are known to report incorrect information
  68     # about mem usage
  69     if _ignore_both(oid):
  70         return False
  71     return not _is_ucd_mem(oid)
  72
  73
  74 #   ---helper---------------------------------------------------------------
  75
  76 # Within _is_ucd or _is_ucd_mem we make use of a whitelist
  77 # in order to expand this list of devices easily.
  78
  79
  80 def _is_ucd(oid):
  81     sys_descr = oid(".1.3.6.1.2.1.1.1.0").lower()
  82     for name in [
  83             "linux",
  84             "cmc-tc",
  85             "hp onboard administrator",
  86             "barracuda",
  87             "pfsense",
  88             "genugate",
  89     ]:
  90         if name in sys_descr:
  91             return True
  92
  93     # Artec email archive appliances
  94     if oid('.1.3.6.1.2.1.1.2.0') == '.1.3.6.1.4.1.8072.3.2.10' \
  95        and "version" in sys_descr and "serial" in sys_descr:
  96         return True
  97
  98     return False
  99
 100
 101 def _is_ucd_mem(oid):
 102     sys_descr = oid(".1.3.6.1.2.1.1.1.0").lower()
 103     # Devices for which ucd_mem should be used
 104     # if and only if HR-table is not available
 105     for name in [
 106             "pfsense",
 107             "ironport model c3",
 108     ]:
 109         if name in sys_descr and not oid(".1.3.6.1.2.1.25.1.1.0"):
 110             return True
 111
 112     # Astaro and Synology are Linux but should use hr_mem
 113     # Otherwise Cache/Buffers are included in used memory
 114     # generating critical state
 115     if oid(".1.3.6.1.2.1.1.2.0").startswith(".1.3.6.1.4.1.8072."):
 116         return False
 117
 118     # Otherwise use ucd_mem for listed devices in _is_ucd.
 119     return _is_ucd(oid)
 120
 121
 122 def _ignore_both(oid):
 123     # Some devices report incorrect data on both HR and UCD, eg. F5 BigIP
 124     return oid(".1.3.6.1.2.1.1.2.0").startswith(".1.3.6.1.4.1.3375")