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Added nagios-okplugin-check_cpu
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check_cpu.py/nagios-okplugin-check_cpu.spec
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check_cpu.py/nagios-okplugin-check_cpu.spec
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%define debug_package %{nil}
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Summary: A Nagios plugin to check CPU on Linux servers
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Name: nagios-okplugin-check_cpu
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Version: 1.0
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Release: 1%{?dist}
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License: GPLv2+
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Group: Applications/System
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URL: https://github.com/opinkerfi/nagios-plugins/
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Source0: https://github.com/opinkerfi/nagios-plugins/archive/%{name}-%{version}-%{release}.tar.gz
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Requires: nagios-okplugin-common
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BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
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Packager: Tomas Edwardsson <tommi@tommi.org>
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BuildArch: noarch
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%description
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Check cpu states on line machines
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%prep
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%setup -q
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%build
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%install
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rm -rf %{buildroot}
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mkdir -p %{buildroot}%{_sharedstatedir}/nagios-okplugin/%{name}
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install -D -p -m 0755 okplugin_check_cpu %{buildroot}%{_libdir}/nagios/plugins/okplugin_check_cpu
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install -D -p -m 0755 nrpe.d/okplugin_check_cpu.cfg %{buildroot}/etc/nrpe.d/okplugin_check_cpu.cfg
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%clean
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rm -rf %{buildroot}
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%post
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/sbin/service nrpe reload
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%files
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%defattr(-,root,root,-)
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%dir %attr(0770, nrpe, nrpe) %{_sharedstatedir}/nagios-okplugin/%{name}
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%{_libdir}/nagios/plugins/*
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%{_sysconfdir}/nrpe.d/*
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%changelog
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* Thu Aug 23 2012 Pall Sigurdsson <palli@opensource.is> 1.0-1
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- Version number bumped
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- Updates buildarch to noarch (tommi@tommi.org)
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* Mon Mar 12 2012 Pall Sigurdsson <palli@opensource.is> 0.3-1
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- new package built with tito
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* Thu Nov 25 2010 Pall Sigurdsson <palli@opensource.is> 0.1-2
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- Nrpe config now ships with plugin by default
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* Mon Mar 1 2010 Tomas Edwardsson <tommi@ok.is> 0.1-1
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- Initial packaging
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1
check_cpu.py/nrpe.d/okplugin_check_cpu.cfg
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check_cpu.py/nrpe.d/okplugin_check_cpu.cfg
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command[okplugin_check_cpu]=/usr/lib/nagios/plugins/okplugin_check_cpu
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check_cpu.py/okplugin_check_cpu
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check_cpu.py/okplugin_check_cpu
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#!/usr/bin/python
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#
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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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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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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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"""
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from pynag.Plugins import PluginHelper, ok, unknown
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def main():
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"""The main logic of the program"""
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# See man proc and search for /proc/stat
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stat_fields = ['cpu', 'user', 'nice', 'system', 'idle', 'iowait', 'irq',
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'softirq', 'steal', 'guest', 'guest_nice']
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pyplug = PluginHelper()
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old_stat = get_saved_stat()
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stat = get_stat()
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# Find shortest stat
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stat_length = len(old_stat) > len(stat) and len(old_stat) or 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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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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pyplug.add_status(ok)
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pyplug.add_summary("CPU load %.2f%%" % (100.0 - averages[3]))
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pyplug.exit()
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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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avg = []
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for pos in range(len(stat)):
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avg.append(float(stat[pos]) / stat_sum * 100)
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return avg
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def get_stat():
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"""Fetches the first line from /proc/stat and returns the numbers"""
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stat_fh = open("/proc/stat")
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return [int(pos) for pos in stat_fh.readline().split()[1:]]
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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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try:
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stat_fh = open("/var/lib/nagios-okplugin/check_cpu")
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except IOError:
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return None
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return [int(pos) for pos in stat_fh.readline().split()[1:]]
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def save_stat(stat):
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"""Save statistics to compare to in next run"""
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stat_fh = open("/var/lib/nagios-okplugin/check_cpu", "w")
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stat_fh.write("cpu " + " ".join([str(pos) for pos in stat]) + "\n")
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stat_fh.close()
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if __name__ == "__main__":
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main()
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# vim: sts=4 expandtab
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