/usr/share/pyshared/cobbler/modules/manage_dnsmasq.py is in python-cobbler 2.2.2-0ubuntu33.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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This is some of the code behind 'cobbler sync'.
Copyright 2006-2009, Red Hat, Inc
Michael DeHaan <mdehaan@redhat.com>
John Eckersberg <jeckersb@redhat.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
"""
import os
import os.path
import shutil
import time
import sys
import glob
import traceback
import errno
from shlex import shlex
import utils
from cexceptions import *
import templar
import item_distro
import item_profile
import item_repo
import item_system
from utils import _
def register():
return "manage"
class DnsmasqManager:
"""
Handles conversion of internal state to the tftpboot tree layout
"""
def __init__(self,config,logger,dhcp=None):
"""
Constructor
"""
self.logger = logger
self.config = config
self.api = config.api
self.distros = config.distros()
self.profiles = config.profiles()
self.systems = config.systems()
self.settings = config.settings()
self.repos = config.repos()
self.templar = templar.Templar(config)
def what(self):
return "dnsmasq"
def write_dhcp_lease(self,port,host,ip,mac):
pass
def remove_dhcp_lease(self,port,host):
pass
def write_dhcp_file(self):
"""
DHCP files are written when manage_dhcp is set in
/var/lib/cobbler/settings.
"""
settings_file = "/etc/dnsmasq.conf"
template_file = "/etc/cobbler/dnsmasq.template"
try:
f2 = open(template_file,"r")
except:
raise CX(_("error writing template to file: %s") % template_file)
template_data = ""
template_data = f2.read()
f2.close()
# build each per-system definition
# as configured, this only works for ISC, patches accepted
# from those that care about Itanium. elilo seems to be unmaintained
# so additional maintaince in other areas may be required to keep
# this working.
elilo = "/var/lib/cobbler/elilo-3.6-ia64.efi"
system_definitions = {}
counter = 0
# we used to just loop through each system, but now we must loop
# through each network interface of each system.
for system in self.systems:
if not system.is_management_supported(cidr_ok=False):
continue
profile = system.get_conceptual_parent()
distro = profile.get_conceptual_parent()
for (name, interface) in system.interfaces.iteritems():
mac = interface["mac_address"]
ip = interface["ip_address"]
host = interface["dns_name"]
if mac is None or mac == "":
# can't write a DHCP entry for this system
continue
counter = counter + 1
systxt = ""
# dnsmasq. don't have to write IP and other info here, but we do tag
# each MAC based on the arch of it's distro, if it needs something other
# than pxelinux.0 -- for these arches, and these arches only, a dnsmasq
# reload (full "cobbler sync") would be required after adding the system
# to cobbler, just to tag this relationship.
if ip is not None and ip != "":
if distro.arch.lower() == "ia64":
systxt = "dhcp-host=net:ia64," + ip + "\n"
# support for other arches needs modifications here
else:
systxt = ""
dhcp_tag = interface["dhcp_tag"]
if dhcp_tag == "":
dhcp_tag = "default"
if not system_definitions.has_key(dhcp_tag):
system_definitions[dhcp_tag] = ""
system_definitions[dhcp_tag] = system_definitions[dhcp_tag] + systxt
# we are now done with the looping through each interface of each system
metadata = {
"insert_cobbler_system_definitions" : system_definitions.get("default",""),
"date" : time.asctime(time.gmtime()),
"cobbler_server" : self.settings.server,
"next_server" : self.settings.next_server,
"elilo" : elilo
}
# now add in other DHCP expansions that are not tagged with "default"
for x in system_definitions.keys():
if x == "default":
continue
metadata["insert_cobbler_system_definitions_%s" % x] = system_definitions[x]
self.templar.render(template_data, metadata, settings_file, None)
def regen_ethers(self):
# dnsmasq knows how to read this database of MACs -> IPs, so we'll keep it up to date
# every time we add a system.
# read 'man ethers' for format info
fh = open("/etc/ethers","w+")
for system in self.systems:
if not system.is_management_supported(cidr_ok=False):
continue
for (name, interface) in system.interfaces.iteritems():
mac = interface["mac_address"]
ip = interface["ip_address"]
if mac is None or mac == "":
# can't write this w/o a MAC address
continue
if ip is not None and ip != "":
fh.write(mac.upper() + "\t" + ip + "\n")
fh.close()
def regen_hosts(self):
# dnsmasq knows how to read this database for host info
# (other things may also make use of this later)
fh = open("/var/lib/cobbler/cobbler_hosts","w+")
for system in self.systems:
if not system.is_management_supported(cidr_ok=False):
continue
for (name, interface) in system.interfaces.iteritems():
mac = interface["mac_address"]
host = interface["dns_name"]
ip = interface["ip_address"]
if mac is None or mac == "":
continue
if host is not None and host != "" and ip is not None and ip != "":
fh.write(ip + "\t" + host + "\n")
fh.close()
def write_dns_files(self):
# already taken care of by the regen_hosts()
pass
def get_manager(config,logger):
return DnsmasqManager(config,logger)
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