bundles/{netdata,pppd,radvd,vmhost,vnstat,wide-dhcp6c}: add monitoring

bundles/pppd/files/check_dyndns_update

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+statusfile="/var/tmp/dyndns.monitoring"
+if ! [[ -f "$statusfile" ]]
+then
+    echo "Status file not found"
+    exit 3
+fi
+
+mtime=$(stat -c %Y $statusfile)
+now=$(date +%s)
+if (( $now - $mtime > 60*60*24*8 ))
+then
+    echo "Status file is older than 8 days!"
+    exit 3
+fi
+
+statuscode=$(cat $statusfile)
+case "$statuscode" in
+    200)
+        echo "OK"
+        exit 0
+        ;;
+    *)
+        echo "Last statuscode was $statuscode"
+        exit 2
+        ;;
+esac