/usr/share/pyshared/cobbler/modules/manage_bind.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
import re
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():
"""
The mandatory cobbler module registration hook.
"""
return "manage"
class BindManager:
def what(self):
return "bind"
def __init__(self,config,logger):
"""
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 regen_hosts(self):
pass # not used
def __forward_zones(self):
"""
Returns a map of zones and the records that belong
in them
"""
zones = {}
forward_zones = self.settings.manage_forward_zones
if type(forward_zones) != type([]):
# gracefully handle when user inputs only a single zone
# as a string instead of a list with only a single item
forward_zones = [forward_zones]
for zone in forward_zones:
zones[zone] = {}
for system in self.systems:
for (name, interface) in system.interfaces.iteritems():
host = interface["dns_name"]
ip = interface["ip_address"]
if not system.is_management_supported(cidr_ok=False):
continue
if not host or not ip:
# gotsta have some dns_name and ip or else!
continue
if host.find(".") == -1:
continue
# match the longest zone!
# e.g. if you have a host a.b.c.d.e
# if manage_forward_zones has:
# - c.d.e
# - b.c.d.e
# then a.b.c.d.e should go in b.c.d.e
best_match = ''
for zone in zones.keys():
if re.search('\.%s$' % zone, host) and len(zone) > len(best_match):
best_match = zone
if best_match == '': # no match
continue
# strip the zone off the dns_name and append the
# remainder + ip to the zone list
host = re.sub('\.%s$' % best_match, '', host)
zones[best_match][host] = ip
return zones
def __reverse_zones(self):
"""
Returns a map of zones and the records that belong
in them
"""
zones = {}
reverse_zones = self.settings.manage_reverse_zones
if type(reverse_zones) != type([]):
# gracefully handle when user inputs only a single zone
# as a string instead of a list with only a single item
reverse_zones = [reverse_zones]
for zone in reverse_zones:
zones[zone] = {}
for sys in self.systems:
for (name, interface) in sys.interfaces.iteritems():
host = interface["dns_name"]
ip = interface["ip_address"]
if not sys.is_management_supported(cidr_ok=False):
continue
if not host or not ip:
# gotsta have some dns_name and ip or else!
continue
# match the longest zone!
# e.g. if you have an ip 1.2.3.4
# if manage_reverse_zones has:
# - 1.2
# - 1.2.3
# then 1.2.3.4 should go in 1.2.3
best_match = ''
for zone in zones.keys():
if re.search('^%s\.' % zone, ip) and len(zone) > len(best_match):
best_match = zone
if best_match == '': # no match
continue
# strip the zone off the front of the ip
# reverse the rest of the octets
# append the remainder + dns_name
ip = ip.replace(best_match, '', 1)
if ip[0] == '.': # strip leading '.' if it's there
ip = ip[1:]
tokens = ip.split('.')
tokens.reverse()
ip = '.'.join(tokens)
zones[best_match][ip] = host + '.'
return zones
def __write_named_conf(self):
"""
Write out the named.conf main config file from the template.
"""
settings_file = "/etc/bind/named.conf.local"
template_file = "/etc/cobbler/named.template"
forward_zones = self.settings.manage_forward_zones
reverse_zones = self.settings.manage_reverse_zones
metadata = {'forward_zones': self.__forward_zones().keys(),
'reverse_zones': [],
'zone_include': ''}
for zone in metadata['forward_zones']:
txt = """
zone "%(zone)s." {
type master;
file "%(zone)s";
};
""" % {'zone': zone}
metadata['zone_include'] = metadata['zone_include'] + txt
for zone in self.__reverse_zones().keys():
tokens = zone.split('.')
tokens.reverse()
arpa = '.'.join(tokens) + '.in-addr.arpa'
metadata['reverse_zones'].append((zone, arpa))
txt = """
zone "%(arpa)s." {
type master;
file "%(zone)s";
};
""" % {'arpa': arpa, 'zone': zone}
metadata['zone_include'] = metadata['zone_include'] + txt
try:
f2 = open(template_file,"r")
except:
raise CX(_("error reading template from file: %s") % template_file)
template_data = ""
template_data = f2.read()
f2.close()
if self.logger is not None:
self.logger.info("generating %s" % settings_file)
self.templar.render(template_data, metadata, settings_file, None)
def __ip_sort(self, ips):
"""
Sorts IP addresses (or partial addresses) in a numerical fashion per-octet
"""
# strings to integer octet chunks so we can sort numerically
octets = map(lambda x: [int(i) for i in x.split('.')], ips)
octets.sort()
# integers back to strings
octets = map(lambda x: [str(i) for i in x], octets)
return ['.'.join(i) for i in octets]
def __pretty_print_host_records(self, hosts, rectype='A', rclass='IN'):
"""
Format host records by order and with consistent indentation
"""
names = [k for k,v in hosts.iteritems()]
if not names: return '' # zones with no hosts
if rectype == 'PTR':
names = self.__ip_sort(names)
else:
names.sort()
max_name = max([len(i) for i in names])
s = ""
for name in names:
spacing = " " * (max_name - len(name))
my_name = "%s%s" % (name, spacing)
my_host = hosts[name]
s += "%s %s %s %s;\n" % (my_name, rclass, rectype, my_host)
return s
def __write_zone_files(self):
"""
Write out the forward and reverse zone files for all configured zones
"""
default_template_file = "/etc/cobbler/zone.template"
cobbler_server = self.settings.server
serial = int(time.time())
forward = self.__forward_zones()
reverse = self.__reverse_zones()
try:
f2 = open(default_template_file,"r")
except:
raise CX(_("error reading template from file: %s") % default_template_file)
default_template_data = ""
default_template_data = f2.read()
f2.close()
for (zone, hosts) in forward.iteritems():
metadata = {
'cobbler_server': cobbler_server,
'serial': serial,
'host_record': ''
}
# grab zone-specific template if it exists
try:
fd = open('/etc/cobbler/zone_templates/%s' % zone)
template_data = fd.read()
fd.close()
except:
template_data = default_template_data
metadata['host_record'] = self.__pretty_print_host_records(hosts)
zonefilename='/etc/bind/db.' + zone
if self.logger is not None:
self.logger.info("generating (forward) %s" % zonefilename)
self.templar.render(template_data, metadata, zonefilename, None)
for (zone, hosts) in reverse.iteritems():
metadata = {
'cobbler_server': cobbler_server,
'serial': serial,
'host_record': ''
}
# grab zone-specific template if it exists
try:
fd = open('/etc/cobbler/zone_templates/%s' % zone)
template_data = fd.read()
fd.close()
except:
template_data = default_template_data
metadata['host_record'] = self.__pretty_print_host_records(hosts, rectype='PTR')
zonefilename='/etc/bind/db.' + zone
if self.logger is not None:
self.logger.info("generating (reverse) %s" % zonefilename)
self.templar.render(template_data, metadata, zonefilename, None)
def write_dns_files(self):
"""
BIND files are written when manage_dns is set in
/var/lib/cobbler/settings.
"""
self.__write_named_conf()
self.__write_zone_files()
def get_manager(config,logger):
return BindManager(config,logger)
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