- Server OS : Ubuntu 12.0.4.1 LTS Server
- Desktop OS : Ubuntu 12.0.4.1 LTS and Windows 7
I have followed an article on the net on how to update a powerdns database. ISC DHCP and PowerDNS How ever I am battling to get the host name of the client requesting the lease. I can see from the log file that the dhcp server has it (in brackets), when I look at the lines :-
- dhcpd: DHCPREQUEST for 192.168.0.90 from 00:1c:c0:1c:1e:84 (MINION) via eth0
- dhcpd: DHCPACK on 192.168.0.90 to 00:1c:c0:1c:1e:84 (MINION) via eth0
My problem lies in the fact that host-decl-name does not hold any values, I would have thought that it would hold MINION as that is the name of the client. How would I get hold of the name MINION in the dhcpd.conf execution. b.t.w. minion is a windows 7 machine.
My dhcpd.conf:
ddns-update-style none; option domain-name "butylseal.int"; option domain-name-servers 192.168.0.201, 192.168.0.202; default-lease-time 600; max-lease-time 7200; authoritative; log-facility local7; subnet 192.168.0.0 netmask 255.255.255.0 { range 192.168.0.1 192.168.0.99; option routers 192.168.0.249; option netbios-name-servers 192.168.0.201; option netbios-node-type 8; on commit { log("=============[ START COMMIT ]================"); log("The host name is:"); log(host-decl-name); set ClientIP = binary-to-ascii(10, 8, ".", leased-address); set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6)); log(concat("Commit: IP: " , ClientIP, " Mac: ", ClientMac, "Hostname: " , host-decl-name)); execute("/etc/dhcp/dhcp-event","commit", ClientIP, ClientMac, host-decl-name); log("============[ END COMMIT ]=================="); } on release { log("============[ START RELEASE ]==============="); set ClientIP = binary-to-ascii(10, 8, ".", leased-address); set ClientMac = binary-to-ascii(16, 8, ":", substring(hradware, 1, 6)); log(concat("Release: IP: ", ClientIP, " Mac: ", ClientMac, "Hostname: ", host-decl-name)); execute("/etc/dhcp/dhcp-event", "release", ClientIP, ClientMace, host-decl-name); log("===========[ END RELEASE ]=================="); } on expiry { log("===========[ START EXPIRY ]================"); set ClientIP = binary-to-ascii(10, 8, ".", leased-address); set ClientMac = binary-to-ascii(16, 8, ":" , substring(hardware, 1, 6)); log(concat("Expiry: IP: ", ClientIP, " Mac: ", ClientMac, "Hostname: ", host-decl-name)); execute("/etc/dhcp/dhcp-event", "expiry", ClientIP, ClientMac); log("===========[ END EXPIRY ] ================="); } }
the scrip to execute:
#!/usr/bin/env python import MySQLdb import os, sys import pprint pp = pprint.PrettyPrinter() mysql_host = "localhost" mysql_user = "mysqlUsr" mysql_pass = "mySqlPass" mysql_db = "mypdnsdb" if (len(sys.argv) > 1): command = sys.argv[1] clientIP = sys.argv[2] clientMac = sys.argv[3] hostname = sys.argv[4] if command == "commit": pp.pprint("commit") f = open("/tmp/leases","a") s = "Leased: %s to %s\n" % (clientIP, hostname) f.write(s) f.flush() f.close() db = MySQLdb.connect(host=mysql_host, user=mysql_user, passwd=mysql_pass, db=mysql_db) cursor = db.cursor() cursor.execute("INSERT INTO records (domain_id,name,type,content,ttl,prio,change_date) VALUES (%s,%s,%s,%s,%s,%s, UNIX_TIMESTAMP(NOW()))", [1,hostname,"A",clientIP,3600,0]) cursor.close() db.commit() db.close() elif command == "release": pp.pprint("release") f = open("/tmp/leases","a") s = "Released: %s from %\n" % (clientIP, hostname) f.write(s) f.flush() f.close() db = MySQLdb.connect(host=mysql_host, user=mysql_user, passwd=mysql_pass, db=mysql_db) cursor = db.cursor() cursor.execute("DELETE FROM records WHERE content = %s AND name = %s", [clientIP,hostname]) db.commit() db.close() elif command == "expiry": pp.pprint("expiry") f = open("/tmp/leases","a") s = "Expired: %s from %s\n" % (clientIP, hostname) f.write(s) f.flush() f.close() db = MySQLdb.connect(host=mysql_host, user=mysql_user, passwd=mysql_pass, db=mysql_db) cursor = db.cursor() cursor.execute("DELETE FROM records WHERE content = %s AND name = %s", [clientIP,hostname]) db.commit() db.close()
thank you
Mark Hollander