added a bgp montioring tool

build.txt

@@ -67,5 +67,6 @@ check_ssl-cert                        1.0
 check_topology-latency.rb             1.0
 check_graphite-metric                 1.0
 check_oom-killer.rb                   0.1.2
+check_bgp                             1.0
 
 # vim: set ts=2 sw=2 et : #

check_bgp

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Script to monitor BGP conections. 
+# MIT License Copyright (c) [2017] [Yornik Heyl] (yornik@yornik.nl) 
+
+# helper function by Dave Simons
+die () {
+  RETVAL=$1
+  shift
+  echo $@
+  exit $RETVAL
+}
+
+status_string=$(vtysh -c 'show  ip bgp  neighbors'| awk '/Description: '$1'/,/BGP state/' | sed -n -e 's/^.*BGP state = //p' )
+
+if [ -z "$status_string" ]; then
+ die 2 "[UNKNOWN] BGP conection with $1 is not cofigured "
+fi
+
+
+if echo "$status_string" |grep --quiet Established ;then
+ die 0 "[OK] BGP conection with $1 is up"
+else 
+ die 2 "[FAIL] BGP conection with $1 is down in state $status_string"
+fi