checks/postgres_sessions

   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 # <<<postgres_sessions>>>
  28 # f 1
  29 # t 4
  30
  31 # instance
  32 # <<<postgres_locks>>>
  33 # [[[foobar]]]
  34 # f 1
  35 # t 4
  36
  37 # t -> idle sessions, f -> active sessions
  38 # Note: one (or both?) lines might be missing. They will never show 0.
  39
  40
  41 def parse_postgres_sessions(info):
  42     parsed = {}
  43     instance_name = ""
  44     for line in info:
  45         if line[0].startswith("[[[") and line[0].endswith("]]]"):
  46             instance_name = line[0][3:-3].upper()
  47             continue
  48         instance = parsed.setdefault(instance_name, {
  49             "total": 0,
  50             "running": 0,
  51         })
  52         if line[0].startswith("t"):
  53             instance["total"] = int(line[1])
  54         elif line[0].startswith("f"):
  55             instance["running"] = int(line[1])
  56     return parsed
  57
  58
  59 def inventory_postgres_sessions(parsed):
  60     return [(db, {}) for db, dbinfo in parsed.items() if dbinfo]
  61
  62
  63 def check_postgres_sessions(item, params, parsed):
  64     if item not in parsed:
  65         # In case of missing information we assume that the login into
  66         # the database has failed and we simply skip this check. It won't
  67         # switch to UNKNOWN, but will get stale.
  68         raise MKCounterWrapped("Login into database failed")
  69
  70     data = parsed[item]
  71     idle = data['total']
  72     running = data['running']
  73     total = idle + running
  74
  75     for key, val in [
  76         ("total", total),
  77         ("running", running),
  78     ]:
  79         infotext = "%s: %s" % (key.title(), val)
  80         warn, crit = params.get(key, (None, None))
  81         state = 0
  82         if crit is not None and val >= crit:
  83             state = 2
  84         elif warn is not None and val >= warn:
  85             state = 1
  86         if state:
  87             infotext += " (warn/crit at %s/%s)" % (warn, crit)
  88         yield state, infotext, [(key, val, warn, crit)]
  89
  90
  91 check_info['postgres_sessions'] = {
  92     "parse_function": parse_postgres_sessions,
  93     "inventory_function": inventory_postgres_sessions,
  94     "check_function": check_postgres_sessions,
  95     "service_description": "PostgreSQL Daemon Sessions %s",
  96     "has_perfdata": True,
  97     "group": "postgres_instance_sessions",
  98 }