Add backupninja snmp script (#264)

* Add backupninja snmp script

* jsonify output

* Better codestyle & apply JSON requirements

* Optimize file using redis.py example

* Properly use of the LibreNMS json format

* typo

snmp/backupninja.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+import io
+import re
+import os
+import json
+
+version = 1
+error = 0
+error_string = ''
+
+logfile = '/var/log/backupninja.log'
+
+backupninja_datas = {
+    'last_actions': 0,
+    'last_fatal': 0,
+    'last_error': 0,
+    'last_warning': 0}
+
+if not os.path.isfile(logfile):
+    error_string = 'file unavailable'
+    error = 1
+    break
+
+with io.open(logfile,'r') as f:
+    for line in reversed(list(f)):
+        match = re.search('^(.*) [a-zA-Z]*: FINISHED: ([0-9]+) actions run. ([0-9]+) fatal. ([0-9]+) error. ([0-9]+) warning.$', line)
+        if match:
+            backupninja_datas['last_actions'] = int(match.group(2))
+            backupninja_datas['last_fatal'] = int(match.group(3))
+            backupninja_datas['last_error'] = int(match.group(4))
+            backupninja_datas['last_warning'] = int(match.group(5))
+            break
+
+output = {'version': version,
+          'error': error,
+          'errorString': error_string,
+          'data': backupninja_datas}
+
+print(json.dumps(output))