Added nagios-okplugin-check_cpu

check_cpu.py/nagios-okplugin-check_cpu.spec

@@ -0,0 +1,58 @@
+%define debug_package %{nil}
+
+Summary:	A Nagios plugin to check CPU on Linux servers
+Name:		nagios-okplugin-check_cpu
+Version:	1.0
+Release:	1%{?dist}
+License:	GPLv2+
+Group:		Applications/System
+URL:		https://github.com/opinkerfi/nagios-plugins/
+Source0:	https://github.com/opinkerfi/nagios-plugins/archive/%{name}-%{version}-%{release}.tar.gz
+Requires:	nagios-okplugin-common
+BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+Packager:	Tomas Edwardsson <tommi@tommi.org>
+BuildArch:	noarch
+
+%description
+Check cpu states on line machines
+
+%prep
+%setup -q
+
+%build
+
+
+%install
+rm -rf %{buildroot}
+mkdir -p %{buildroot}%{_sharedstatedir}/nagios-okplugin/%{name}
+install -D -p -m 0755 okplugin_check_cpu %{buildroot}%{_libdir}/nagios/plugins/okplugin_check_cpu
+install -D -p -m 0755 nrpe.d/okplugin_check_cpu.cfg %{buildroot}/etc/nrpe.d/okplugin_check_cpu.cfg
+
+
+%clean
+rm -rf %{buildroot}
+
+%post
+/sbin/service nrpe reload
+
+%files
+%defattr(-,root,root,-)
+%dir %attr(0770, nrpe, nrpe) %{_sharedstatedir}/nagios-okplugin/%{name}
+%{_libdir}/nagios/plugins/*
+%{_sysconfdir}/nrpe.d/*
+
+
+
+%changelog
+* Thu Aug 23 2012 Pall Sigurdsson <palli@opensource.is> 1.0-1
+- Version number bumped
+- Updates buildarch to noarch (tommi@tommi.org)
+
+* Mon Mar 12 2012 Pall Sigurdsson <palli@opensource.is> 0.3-1
+- new package built with tito
+
+* Thu Nov 25 2010  Pall Sigurdsson <palli@opensource.is> 0.1-2
+- Nrpe config now ships with plugin by default
+* Mon Mar  1 2010  Tomas Edwardsson <tommi@ok.is> 0.1-1
+- Initial packaging
+

check_cpu.py/nrpe.d/okplugin_check_cpu.cfg

@@ -0,0 +1 @@
+command[okplugin_check_cpu]=/usr/lib/nagios/plugins/okplugin_check_cpu

check_cpu.py/okplugin_check_cpu

@@ -0,0 +1,91 @@
+#!/usr/bin/python
+#
+# 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
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+Gathers information on cpu usage on a linux machine
+"""
+
+from pynag.Plugins import PluginHelper, ok, unknown
+
+
+def main():
+    """The main logic of the program"""
+
+    # See man proc and search for /proc/stat
+    stat_fields = ['cpu', 'user', 'nice', 'system', 'idle', 'iowait', 'irq',
+                   'softirq', 'steal', 'guest', 'guest_nice']
+
+    pyplug = PluginHelper()
+
+    old_stat = get_saved_stat()
+    stat = get_stat()
+
+    # Find shortest stat
+    stat_length = len(old_stat) > len(stat) and len(old_stat) or 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="%")
+
+    try:
+        save_stat(stat)
+    except IOError, err:
+        pyplug.exit(unknown, "Unable to save cpu statistics: %s" % err)
+
+    pyplug.add_status(ok)
+    pyplug.add_summary("CPU load %.2f%%" % (100.0 - averages[3]))
+    pyplug.exit()
+
+def calc_avg(stat):
+    """Calculates the average of each int in array"""
+    stat_sum = sum(stat)
+    avg = []
+    for pos in range(len(stat)):
+        avg.append(float(stat[pos]) / stat_sum * 100)
+    return avg
+
+def get_stat():
+    """Fetches the first line from /proc/stat and returns the numbers"""
+    stat_fh = open("/proc/stat")
+    return [int(pos) for pos in stat_fh.readline().split()[1:]]
+
+def get_saved_stat():
+    """Fetches information about the last run to be able to do averages"""
+    try:
+        stat_fh = open("/var/lib/nagios-okplugin/check_cpu")
+    except IOError:
+        return None
+    return [int(pos) for pos in stat_fh.readline().split()[1:]]
+
+def save_stat(stat):
+    """Save statistics to compare to in next run"""
+    stat_fh = open("/var/lib/nagios-okplugin/check_cpu", "w")
+
+    stat_fh.write("cpu " + " ".join([str(pos) for pos in stat]) + "\n")
+    stat_fh.close()
+
+if __name__ == "__main__":
+    main()
+
+# vim: sts=4 expandtab