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https://github.com/opinkerfi/nagios-plugins.git
synced 2024-11-05 01:53:44 +01:00
Added returning of a 5 second sample in perfdata
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@ -1,6 +1,6 @@
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#!/usr/bin/python
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#
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# Copyright 2014, Tomas Edwardsson
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# Copyright 2014, Tomas Edwardsson
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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@ -16,9 +16,13 @@
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Gathers information on cpu usage on a linux machine
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It returns performance data for both the last 5 seconds and from last run.
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"""
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from pynag.Plugins import PluginHelper, ok, unknown
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import os
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import time
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def main():
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@ -30,36 +34,68 @@ def main():
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pyplug = PluginHelper()
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# Get the statistics from last run
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old_stat = get_saved_stat()
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# Get current state
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stat = get_stat()
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# Find shortest stat
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if old_stat:
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stat_length = len(old_stat) > len(stat) and len(old_stat) or len(stat)
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else:
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stat_length = len(stat)
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if old_stat:
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diff = []
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for pos in range(stat_length):
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diff.append(stat[pos] - old_stat[pos])
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averages = calc_avg(diff)
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else:
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averages = calc_avg(stat)
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for pos in range(stat_length):
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pyplug.add_metric(label=stat_fields[pos+1], value=averages[pos],
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uom="%")
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# Resample
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time.sleep(5)
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stat2 = get_stat()
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try:
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save_stat(stat)
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except IOError, err:
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pyplug.exit(unknown, "Unable to save cpu statistics: %s" % err)
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# Calculate averages for the last few seconds
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current_averages = diff_stats(stat2, stat)
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for pos in range(len(current_averages)):
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pyplug.add_metric(label=stat_fields[pos+1],
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value=current_averages[pos],
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uom="%")
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# Calculate averages from last run
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if old_stat:
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last_run_avg = diff_stats(old_stat, stat)
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for pos in range(len(current_averages)):
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pyplug.add_metric(label=stat_fields[pos+1]+"_avg",
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value=last_run_avg[pos],
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uom="%")
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pyplug.add_status(ok)
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pyplug.add_summary("CPU load %.2f%%" % (100.0 - averages[3]))
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pyplug.add_summary("CPU load %.2f%%" % (100.0 - current_averages[3]))
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pyplug.exit()
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def diff_stats(older, newer):
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"""Calculates the percentage between two stat arrays"""
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if older:
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diff = []
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for pos in range(len(newer)):
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diff.append(newer[pos] - older[pos])
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averages = calc_avg(diff)
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else:
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averages = calc_avg(newer)
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return averages
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def remove_stale_state():
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"""Removes the last state file if we have rebooted"""
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try:
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state_mtime = os.stat("/var/lib/nagios-okplugin/check_cpu").st_mtime
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boot_time = os.stat("/proc/1").st_mtime
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if state_mtime < boot_time:
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print "unlinking"
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os.unlink("/var/lib/nagios-okplugin/check_cpu")
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except OSError:
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return None
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return state_mtime
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def calc_avg(stat):
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"""Calculates the average of each int in array"""
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stat_sum = sum(stat)
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@ -75,6 +111,8 @@ def get_stat():
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def get_saved_stat():
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"""Fetches information about the last run to be able to do averages"""
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remove_stale_state()
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try:
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stat_fh = open("/var/lib/nagios-okplugin/check_cpu")
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except IOError:
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