Module: check_mk Branch: master Commit: a11b8970e9f7b994857ff55cd637053f8518484e URL: http://git.mathias-kettner.de/git/?p=check_mk.git;a=commit;h=a11b8970e9f7b9… Author: Marcel Arentz &lt;ma(a)mathias-kettner.de&gt; Date: Fri Sep 16 14:23:36 2016 +0200 3839 filehandler: added new plugin for monitoring file handles in linux This new plugin reads file handles provided by /proc/sys/fs/file-nr and puts them in relation of each other. Thresholds of this check can be configured. Defaults are on 80/90%. --- .werks/3839 | 11 ++++++ ChangeLog | 1 + agents/plugins/mk_filehandler | 33 +++++++++++++++++ checkman/filehandler | 16 +++++++++ checks/filehandler | 70 ++++++++++++++++++++++++++++++++++++ web/plugins/metrics/check_mk.py | 10 ++++++ web/plugins/wato/check_parameters.py | 20 +++++++++++ 7 files changed, 161 insertions(+) diff --git a/.werks/3839 b/.werks/3839 new file mode 100644 index 0000000..b5a6d24 --- /dev/null +++ b/.werks/3839 @@ -0,0 +1,11 @@ +Title: filehandler: added new plugin for monitoring file handles in linux +Level: 1 +Component: checks +Compatible: compat +Version: 1.4.0i1 +Date: 1474028116 +Class: feature + +This new plugin reads file handles provided by /proc/sys/fs/file-nr and +puts them in relation of each other. +Thresholds of this check can be configured. Defaults are on 80/90%. diff --git a/ChangeLog b/ChangeLog index 910e8e1..a36def0 100644 --- a/ChangeLog +++ b/ChangeLog @@ -164,6 +164,7 @@ * 3803 netapp_api_connection: reports any errors happened during the collection of data... * 3859 check_mail_loop.vbs: New MRPE script to perform a mail loop check via Outlook MAPI... * 3838 hitachi_hus_dku & hitachi_hus_dkc: more detailed output even if everything is in state OK... + * 3839 filehandler: added new plugin for monitoring file handles in linux... * 3073 FIX: windows agent: relative paths to mrpe scripts are now treated as relative to the agent installation directory... * 3061 FIX: mk_jolokia: Fixed debugging of the agent plugin * 3074 FIX: windows agent: fixed incorrect values for 32-bit performance counters diff --git a/agents/plugins/mk_filehandler b/agents/plugins/mk_filehandler new file mode 100755 index 0000000..64668e7 --- /dev/null +++ b/agents/plugins/mk_filehandler @@ -0,0 +1,33 @@ +#!/bin/bash +# -*- encoding: utf-8; py-indent-offset: 4 -*- +# +------------------------------------------------------------------+ +# | ____ _ _ __ __ _ __ | +# | / ___| |__ ___ ___| | __ | \/ | |/ / | +# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / | +# | | |___| | | | __/ (__| < | | | | . \ | +# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ | +# | | +# | Copyright Mathias Kettner 2014 mk(a)mathias-kettner.de | +# +------------------------------------------------------------------+ +# +# This file is part of Check_MK. +# The official homepage is at http://mathias-kettner.de/check_mk. +# +# check_mk is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation in version 2. check_mk is distributed +# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with- +# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. See the GNU General Public License for more de- +# tails. You should have received a copy of the GNU General Public +# License along with GNU Make; see the file COPYING. If not, write +# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, +# Boston, MA 02110-1301 USA. + +FILE=/proc/sys/fs/file-nr + +echo '<<<filehandler>>>' +if [ -a $FILE ]; then + cat $FILE +fi + diff --git a/checkman/filehandler b/checkman/filehandler new file mode 100644 index 0000000..1f50c79 --- /dev/null +++ b/checkman/filehandler @@ -0,0 +1,16 @@ +title: Total and used filehandles on system +agents: linux +catalog: os/kernel +license: GPL +distribution: check_mk +description: + This check measures the current used fileshandles and sets it + in relation to the maximum. + + Upper default levels are set to 80, 90 %. These levels are configurable. + +perfdata: + The percentage of used filehandles. + +inventory: + One service is created. diff --git a/checks/filehandler b/checks/filehandler new file mode 100644 index 0000000..c3c2f1a --- /dev/null +++ b/checks/filehandler @@ -0,0 +1,70 @@ +#!/usr/bin/python +# -*- encoding: utf-8; py-indent-offset: 4 -*- +# +------------------------------------------------------------------+ +# | ____ _ _ __ __ _ __ | +# | / ___| |__ ___ ___| | __ | \/ | |/ / | +# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / | +# | | |___| | | | __/ (__| < | | | | . \ | +# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ | +# | | +# | Copyright Mathias Kettner 2014 mk(a)mathias-kettner.de | +# +------------------------------------------------------------------+ +# +# This file is part of Check_MK. +# The official homepage is at http://mathias-kettner.de/check_mk. +# +# check_mk is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation in version 2. check_mk is distributed +# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with- +# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. See the GNU General Public License for more de- +# tails. You should have received a copy of the GNU General Public +# License along with GNU Make; see the file COPYING. If not, write +# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, +# Boston, MA 02110-1301 USA. + + +# Measures total allocated file handles. +# The output displays +# - the number of allocated file handles +# - the number of allocatedly used file handles (with the 2.4 kernel); or +# the number of allocatedly unused file handles (with the 2.6 kernel) +# - the maximum files handles that can be allocated +# (can also be found in /proc/sys/fs/file-max) +# Example output of '/proc/sys/fs/file-nr': +# <<<filehandler>>> +# 9376 0 817805 + + +factory_settings['filehandler_default_levels'] = { + 'levels': (80.0, 90.0) +} + +def inventory_filehandler(info): + return [ ( None, {} ) ] + +def check_filehandler(_no_item, params, info): + allocated, used_or_unused, maximum = info[0] + state = 0 + perc = float(allocated) / float(maximum) * 100.0 + infotext = '%.1f%% used (%s of %s file handles)' % (perc, allocated, maximum) + warn, crit = params['levels'] + + if perc >= crit: + state = 2 + elif perc >= warn: + state = 1 + if state > 0: + infotext += ' (warn/crit at %.1f%%/%.1f%%)' % (warn, crit) + + return state, infotext, [ ( 'filehandler_perc', perc, warn, crit ) ] + +check_info['filehandler'] = { + 'check_function' : check_filehandler, + 'inventory_function' : inventory_filehandler, + 'service_description' : 'Filehandler', + 'has_perfdata' : True, + 'default_levels_variable' : 'filehandler_default_levels', + 'group' : 'filehandler', +} diff --git a/web/plugins/metrics/check_mk.py b/web/plugins/metrics/check_mk.py index 51739e4..ca69bf9 100644 --- a/web/plugins/metrics/check_mk.py +++ b/web/plugins/metrics/check_mk.py @@ -3630,6 +3630,11 @@ metric_info["dns_nxdomain"] = { "color" : "34/a", } +metric_info["filehandler_perc"] = { + "title" : _("Used file handles"), + "unit" : "%", + "color" : "#4800ff", +} #. # .--Checks--------------------------------------------------------------. @@ -5572,6 +5577,11 @@ perfometer_info.append({ # all segments }) +perfometer_info.append({ + "type" : "linear", + "segments" : [ "filehandler_perc" ], + "total" : 100.0, +}) #. # .--Graphs--------------------------------------------------------------. diff --git a/web/plugins/wato/check_parameters.py b/web/plugins/wato/check_parameters.py index a4cd01f..d75cc39 100644 --- a/web/plugins/wato/check_parameters.py +++ b/web/plugins/wato/check_parameters.py @@ -2740,6 +2740,26 @@ register_check_parameters( match_type = "dict", ) +register_check_parameters( + subgroup_storage, + "filehandler", + _("Filehandler"), + Dictionary( + elements = [ + ( "levels", Tuple( + title = _("Levels"), + default_value = (80.0, 90.0), + elements = [ + Percentage(title = _("Warning at"), unit = _("%")), + Percentage(title = _("Critical at"), unit = _("%")) + ] + ), + ), + ] + ), + None, + match_type = "dict" +) #. # .--Unsorted--(Don't create new stuff here!)----------------------------.