created script to create dhcp configuration files

dhcp_sync.py

@@ -0,0 +1,106 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+import datetime, os, commands, sys, shutil
+from django.core.management import setup_environ
+import settings
+
+setup_environ(settings)
+
+from mdb.models import *
+
+to_be_updated = []
+dhcp_filename = "dhcpd.conf"
+dhcp_file_temp_dir = "dhcp"
+#dhcp_file_dir = "/etc/dhcp"
+dhcp_file_dir = "dhcp2"
+
+dhcp_orig_file = "%s/%s" % (dhcp_file_dir, dhcp_filename)
+dhcp_temp_file = "%s/%s" % (dhcp_file_temp_dir, dhcp_filename)
+
+dhcp_orig_serial = 0
+
+if not os.path.isdir(dhcp_file_temp_dir):
+	os.mkdir(dhcp_file_temp_dir)
+
+if not os.path.isdir(dhcp_file_dir):
+	os.mkdir(dhcp_file_dir)
+
+# read the current dhcp configs first line to get the serial
+if os.path.exists(dhcp_orig_file):
+	dhcp_orig_fd = open(dhcp_orig_file, "r")
+	dhcp_orig_serial = int(dhcp_orig_fd.readline().split(":")[1])
+	dhcp_orig_fd.close()
+
+
+# fetch configuration option #1
+# we don't support more then one at this time.
+config = DhcpConfig.objects.all()[0]
+
+if config.serial <= dhcp_orig_serial:
+	print "no update nesecarry"
+#	sys.exit(0)
+
+# open a temporary file to build the new configuration
+dhcp_temp_fd = open(dhcp_temp_file, "w")
+
+# write the new serial to the file
+dhcp_temp_fd.write("; serial:%s\n" % config.serial)
+
+# write if the dhcp server is authoritative
+if config.authoritative:
+	dhcp_temp_fd.write("authoritative;\n")
+
+# write default lease time
+dhcp_temp_fd.write("default-lease-time %d;\n" % config.default_lease_time)
+
+# write max lease time
+dhcp_temp_fd.write("max-lease-time %d;\n" % config.max_lease_time)
+
+# write log facility
+dhcp_temp_fd.write("log-facility %s;\n" % config.log_facility)
+
+# write update style
+dhcp_temp_fd.write("ddns-update-style %s;\n" % config.ddns_update_style)
+
+
+
+for subnet in config.ip4subnet_set.all():
+	dhcp_temp_fd.write("\n# %s\n" % subnet.name)
+	dhcp_temp_fd.write("subnet %s netmask %s {\n" % (subnet.network, subnet.netmask))
+
+	for option in subnet.dhcpoption_set.all():
+		dhcp_temp_fd.write("\toption %s %s;\n" % (option.key, option.value))
+
+	for option in subnet.dhcpcustomfield_set.all():
+		dhcp_temp_fd.write("\t%s;\n" % option.value)
+
+	if subnet.dhcp_dynamic:
+		dhcp_temp_fd.write("\trange %s %s;\n"
+			% (subnet.dhcp_dynamic_start, subnet.dhcp_dynamic_end))
+
+	dhcp_temp_fd.write("}\n")
+
+
+for subnet in config.ip4subnet_set.all():
+	if not subnet.dhcp_dynamic: continue
+
+	for ip4address in subnet.ip4address_set.all():
+		if ip4address.interface_set.count() == 0: continue
+		interface = ip4address.interface_set.get()
+		if not interface.dhcp_client: continue
+		
+		dhcp_temp_fd.write("\nhost %s {\n" % interface.host.hostname)
+		dhcp_temp_fd.write("\thardware ethernet %s;\n" % interface.macaddr)
+		dhcp_temp_fd.write("\tfixed-address %s.%s;\n"
+			% (interface.host.hostname, interface.domain.domain_name))
+		dhcp_temp_fd.write("}\n")
+		
+#		print "found interface %s\n" % interface
+
+dhcp_temp_fd.close()
+
+
+shutil.copy(dhcp_temp_file, dhcp_orig_file)
+
+sys.exit(0)