Created script which pings a specific host-type and writes to the ip4address object when it was last seen. Also made a change to the models in order to facilitate the logging.

mdb/models.py

@@ -372,6 +372,7 @@ class DhcpCustomField(models.Model):
 class Ip4Address(models.Model):
 	subnet = models.ForeignKey(Ip4Subnet)
 	address = models.IPAddressField()
+	last_contact = models.DateTimeField()
 
 	def __unicode__(self):
 		if self.interface_set.count() == 0:

scripts/ping_service.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+import os,sys,datetime
+
+try:
+	host_type = sys.argv[1]
+except:
+	print "USAGE: %s <host type>" % sys.argv[0]
+	sys.exit(1)
+
+from django.core.management import setup_environ
+from django.core.mail import mail_admins
+from dns_mdb import settings
+
+setup_environ(settings)
+
+from mdb.models import *
+
+debugging = False
+
+
+
+def do_ping(ipaddr):
+	if os.system("ping -c 1 -W 1 %s > /dev/null 2>&1" % ipaddr) == 0:
+		return 1
+	else:
+		return None
+
+hosts = Host.objects.filter(host_type__host_type = host_type)
+
+
+for host in hosts:
+	interfaces = host.interface_set.all()
+	
+	for interface in interfaces:
+		if do_ping(interface.ip4address.address):
+			interface.ip4address.last_contact = datetime.datetime.now()
+			interface.ip4address.save()
+			if debugging:
+				print "%s (%s) : success" % (host, interface.ip4address.address)
+		else:
+			if debugging:
+				print "%s (%s) : fail   " % (host, interface.ip4address.address)
+			
+
+	
+
+