checks/k8s_resources

   1 #!/usr/bin/python
   2 # -*- encoding: utf-8; py-indent-offset: 4 -*-
   3 # +------------------------------------------------------------------+
   4 # |             ____ _               _        __  __ _  __           |
   5 # |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
   6 # |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
   7 # |           | |___| | | |  __/ (__|   <    | |  | | . \            |
   8 # |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
   9 # |                                                                  |
  10 # | Copyright Mathias Kettner 2018             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
  28 def get_k8s_resources_inventory_function(name):
  29     def inventory_function(parsed):
  30         if parsed.get('capacity', {}).get(name):
  31             return [(None, {})]
  32
  33     return inventory_function
  34
  35
  36 def get_k8s_resources_check_function(name, default, readable):
  37     def check_resources(_no_item, params, parsed):
  38         request = parsed.get('requests', {}).get(name, default)
  39         yield 0, 'Request: %s' % readable(request), [('k8s_%s_request' % name, request)]
  40
  41         limit = parsed.get('limits', {}).get(name)
  42         if limit:
  43             if math.isinf(limit):
  44                 yield 0, 'Limit: n.a.'
  45             elif limit:
  46                 yield 0, 'Limit: %s' % readable(limit), [('k8s_%s_limit' % name, limit)]
  47
  48         allocatable = parsed.get('allocatable', {}).get(name, default)
  49         yield 0, 'Allocatable: %s' % readable(allocatable), [('k8s_%s_allocatable' % name,
  50                                                               allocatable)]
  51
  52         capacity = parsed.get('capacity', {}).get(name, default)
  53         yield 0, 'Capacity: %s' % readable(capacity), [('k8s_%s_capacity' % name, capacity)]
  54
  55         if allocatable:
  56             usage = 100.0 * request / allocatable
  57             yield check_levels(
  58                 usage,
  59                 'k8s_%s_usage' % name,
  60                 params.get(name),
  61                 infoname='Usage',
  62                 human_readable_func=get_percent_human_readable)
  63
  64     return check_resources
  65
  66
  67 check_info['k8s_resources'] = {
  68     'parse_function': parse_k8s,
  69     'includes': ['k8s.include'],
  70 }
  71
  72 check_info['k8s_resources.pods'] = {
  73     'inventory_function': get_k8s_resources_inventory_function('pods'),
  74     'check_function': get_k8s_resources_check_function('pods', 0, str),
  75     'service_description': 'Pod resources',
  76     'has_perfdata': True,
  77     'group': 'k8s_resources',
  78 }
  79
  80 check_info['k8s_resources.cpu'] = {
  81     'inventory_function': get_k8s_resources_inventory_function('cpu'),
  82     'check_function': get_k8s_resources_check_function('cpu', 0.0, lambda x: '%.3f' % x),
  83     'service_description': 'CPU resources',
  84     'has_perfdata': True,
  85     'group': 'k8s_resources',
  86 }
  87
  88 check_info['k8s_resources.memory'] = {
  89     'inventory_function': get_k8s_resources_inventory_function('memory'),
  90     'check_function': get_k8s_resources_check_function('memory', 0.0, get_bytes_human_readable),
  91     'service_description': 'Memory resources',
  92     'has_perfdata': True,
  93     'group': 'k8s_resources',
  94 }