checks/mounts

   1 #!/usr/bin/python
   2 # -*- encoding: utf-8; py-indent-offset: 4 -*-
   3 # +------------------------------------------------------------------+
   4 # |             ____ _               _        __  __ _  __           |
   5 # |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
   6 # |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
   7 # |           | |___| | | |  __/ (__|   <    | |  | | . \            |
   8 # |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
   9 # |                                                                  |
  10 # | Copyright Mathias Kettner 2014             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 # See https://utcc.utoronto.ca/~cks/space/blog/linux/NFSStaleUnmounting
  28 # Output changes from
  29 # knvmsapprd:/transreorg/sap/trans /transreorg/sap/trans nfs4 rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.24.98.63,local_lock=none,addr=172.24.98.57 0 0
  30 # to
  31 # knvmsapprd:/transreorg/sap/trans /transreorg/sap/trans\040(deleted) nfs4 rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.24.98.63,local_lock=none,addr=172.24.98.57 0 0
  32
  33
  34 def inventory_mounts(info):
  35     inventory = []
  36     devices = []
  37     for dev, mp, fstype, options, _dump, _fsck in info:
  38         if fstype == "tmpfs":
  39             continue
  40
  41         if mp in ["/etc/resolv.conf", "/etc/hostname", "/etc/hosts"]:
  42             continue
  43
  44         if dev not in devices:
  45             devices.append(dev)
  46             opts = options.split(",")
  47             opts.sort()
  48             inventory.append((mp.replace("\\040(deleted)", ""), opts))
  49     return inventory
  50
  51
  52 def check_mounts(item, targetopts, info):
  53     # Ignore options that are allowed to change
  54     def should_ignore_option(option):
  55         for ignored_option in ["commit=", "localalloc=", "subvol=", "subvolid="]:
  56             if option.startswith(ignored_option):
  57                 return True
  58         return False
  59
  60     for _dev, mp, _fstype, options, _dump, _fsck in info:
  61         if item == mp.replace("\\040(deleted)", ""):
  62             if mp.endswith("\\040(deleted)"):
  63                 return 1, "Mount point detected as stale"
  64
  65             opts = options.split(",")
  66             # Now compute the exact difference.
  67
  68             exceeding = []
  69             for o in opts:
  70                 if o not in targetopts and not should_ignore_option(o):
  71                     exceeding.append(o)
  72
  73             missing = []
  74             for o in targetopts:
  75                 if o not in opts and not should_ignore_option(o):
  76                     missing.append(o)
  77
  78             if not missing and not exceeding:
  79                 return 0, "Mount options exactly as expected"
  80
  81             infos = []
  82             if missing:
  83                 infos.append("Missing: %s" % ",".join(missing))
  84             if exceeding:
  85                 infos.append("Exceeding: %s" % ",".join(exceeding))
  86             infotext = ", ".join(infos)
  87
  88             if "ro" in exceeding:
  89                 return 2, "Filesystem has switched to read-only and is probably corrupted(!!), %s" % infotext
  90
  91             # Just warn in other cases
  92             return 1, infotext
  93
  94     return 3, "Filesystem not mounted"
  95
  96
  97 check_info["mounts"] = {
  98     'check_function': check_mounts,
  99     'inventory_function': inventory_mounts,
 100     'service_description': 'Mount options of %s',
 101     'group': 'fs_mount_options',
 102 }