checks/postgres_stats

   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_stats>>>
  28 # [databases_start]
  29 # postgres
  30 # testdb
  31 # datenbank
  32 # [databases_end]
  33 # datname;sname;tname;vtime;atime
  34 # postgres;pg_catalog;pg_statistic;-1;-1
  35 # postgres;pg_catalog;pg_type;-1;-1
  36 # postgres;pg_catalog;pg_authid;-1;-1
  37 # postgres;pg_catalog;pg_attribute;-1;-1
  38
  39
  40 def inventory_postgres_stats(parsed):
  41     for db in parsed:
  42         yield "VACUUM %s" % db, {}
  43         yield "ANALYZE %s" % db, {}
  44
  45
  46 def check_postgres_stats(item, params, parsed):
  47     item_type, database = item.split(" ", 1)
  48
  49     if database not in parsed:
  50         # In case of missing information we assume that the login into
  51         # the database has failed and we simply skip this check. It won't
  52         # switch to UNKNOWN, but will get stale.
  53         raise MKCounterWrapped("Login into database failed")
  54
  55     if item_type.startswith("VACUUM"):
  56         stats_field, paramskey, text = "vtime", "vacuum", "vacuumed"
  57     else:
  58         stats_field, paramskey, text = "atime", "analyse", "analyzed"
  59
  60     # namespace,  tablename, last_vacuum,  last_analyze
  61     # ['public', 'my_table', '1424352356', '1424352356'],
  62     oldest_element = None
  63     never_checked = []
  64     for line in parsed[database]:
  65         # Tables with metadata are ignored
  66         if line["sname"] == "pg_catalog":
  67             continue
  68
  69         value = line[stats_field]
  70         if value == "-1" or value == "":
  71             never_checked.append(line["tname"])
  72             continue
  73
  74         last_time = int(value)
  75         if not oldest_element or last_time < oldest_element[stats_field]:
  76             oldest_element = line
  77
  78     now = time.time()
  79     if oldest_element:
  80         oldest_time = int(oldest_element[stats_field])
  81         warn, crit = params.get("last_%s" % paramskey, (None, None))
  82         yield 0, "Table: %s" % oldest_element["tname"]
  83
  84         state = 0
  85         if crit and now - crit > oldest_time:
  86             state = 2
  87         elif warn and now - warn > oldest_time:
  88             state = 1
  89
  90         extra_info = ""
  91         if state:
  92             extra_info = " (warn/crit at %s/%s)" % (get_age_human_readable(warn),
  93                                                     get_age_human_readable(crit))
  94         yield state, "Time since last vacuum %s%s" % (get_age_human_readable(now - oldest_time),
  95                                                       extra_info)
  96
  97     key = "postgres_stats.%s" % item
  98     if not never_checked:
  99         set_item_state(key, now)
 100         yield 0, "No never checked tables"
 101
 102     elif never_checked:
 103         infotext = "%d tables were never %s: %s%s" % \
 104                    (len(never_checked), text, "/".join(never_checked[:5]),
 105                     len(never_checked) > 5 and " (first %d shown)" % min(5, len(never_checked)) or "")
 106
 107         if "never_analyze_vacuum" in params:
 108             last_ts = get_item_state(key)
 109             if last_ts is None:
 110                 set_item_state(key, now)
 111                 yield 0, infotext
 112                 return
 113
 114             age = now - last_ts
 115             warn, crit = params["never_analyze_vacuum"]
 116             state = 0
 117             if age >= crit:
 118                 state = 2
 119             elif age >= warn:
 120                 state = 1
 121             if state:
 122                 infotext += " (warn/crit at %s/%s)" % \
 123                             (get_age_human_readable(warn),
 124                              get_age_human_readable(crit),)
 125             yield state, infotext
 126
 127         else:
 128             yield 1, infotext
 129
 130
 131 check_info['postgres_stats'] = {
 132     "parse_function": parse_postgres_dbs,
 133     "check_function": check_postgres_stats,
 134     "inventory_function": inventory_postgres_stats,
 135     "service_description": "PostgreSQL %s",
 136     "group": "postgres_maintenance",
 137     "includes": ["postgres.include"],
 138 }