add systemd monitoring tool by Andrea Briganti (GPL)

pynagsystemd.py

@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+"""
+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 2
+of the License.
+Copyright Andrea Briganti a.k.a 'Kbyte'
+"""
+import io
+import subprocess
+import argparse
+
+import nagiosplugin
+
+
+class SystemdStatus(nagiosplugin.Resource):
+    name = 'SYSTEMD'
+
+    def probe(self):
+        # Execute systemctl --failed --no-legend and get output
+        try:
+            p = subprocess.Popen(['systemctl', '--failed', '--no-legend'],
+                                 stderr=subprocess.PIPE,
+                                 stdin=subprocess.PIPE,
+                                 stdout=subprocess.PIPE)
+            pres, err = p.communicate()
+        except OSError as e:
+            raise nagiosplugin.CheckError(e)
+
+        if err:
+            raise nagiosplugin.CheckError(err)
+
+        if pres:
+            result = ""
+            for line in io.StringIO(pres.decode('utf-8')):
+                result = "%s %s" % (result, line.split(' ')[0])
+
+            return [nagiosplugin.Metric('systemd', (False, result), context='systemd')]
+
+        return [nagiosplugin.Metric('systemd', (True, None), context='systemd')]
+
+
+class ServiceStatus(nagiosplugin.Resource):
+    name = 'SYSTEMD'
+
+    def __init__(self, *args, **kwargs):
+        self.service = kwargs.pop('service')
+        super(nagiosplugin.Resource, self).__init__(*args, **kwargs)
+
+    def probe(self):
+        # Execute systemctl is-active and get output
+        try:
+            p = subprocess.Popen(['systemctl', 'is-active', self.service],
+                                 stderr=subprocess.PIPE,
+                                 stdin=subprocess.PIPE,
+                                 stdout=subprocess.PIPE)
+            pres, err = p.communicate()
+        except OSError as e:
+            raise nagiosplugin.CheckError(e)
+
+        if err:
+            raise nagiosplugin.CheckError(err)
+        if pres:
+            result = ""
+            for line in io.StringIO(pres.decode('utf-8')):
+                result = "%s %s" % (result, line.split(' ')[0])
+            result = result.strip()
+            if result == "active":
+                return [nagiosplugin.Metric('systemd', (True, None), context='systemd')]
+            else:
+                return [nagiosplugin.Metric('systemd', (False, self.service), context='systemd')]
+
+        return [nagiosplugin.Metric('systemd', (False, "No Service given"), context='systemd')]
+
+
+class SystemdContext(nagiosplugin.Context):
+    def __init__(self):
+        super(SystemdContext, self).__init__('systemd')
+
+    def evaluate(self, metric, resource):
+        value, output = metric.value
+        if value:
+            return self.result_cls(nagiosplugin.Ok, metric=metric)
+        else:
+            return self.result_cls(nagiosplugin.Critical, metric=metric, hint='failed units: %s' % output)
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-s", "--service", type=str, dest="service", help="Name of the Service that is beeing tested")
+
+    args = parser.parse_args()
+
+    if args.service is None:
+        check = nagiosplugin.Check(
+            SystemdStatus(),
+            SystemdContext())
+    else:
+        check = nagiosplugin.Check(
+            ServiceStatus(service=args.service),
+            SystemdContext())
+    check.main()
+
+
+if __name__ == '__main__':
+    main()