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mirror of https://github.com/opinkerfi/nagios-plugins.git synced 2024-11-21 18:03:45 +01:00

Added returning of a 5 second sample in perfdata

This commit is contained in:
Tomas Edwardsson 2014-01-20 17:50:28 +00:00
parent 5d0df0bfe9
commit 067f58f52e

View File

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