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97195eb07c
freeipa/ipaserver/install/bindinstance.py
Martin Basti 97195eb07c Add missing attributes to named.conf 
Ticket: https://fedorahosted.org/freeipa/ticket/3801#comment:31
Reviewed-By: David Kupka <dkupka@redhat.com>
Reviewed-By: Petr Spacek <pspacek@redhat.com>
2014-10-14 13:55:02 +02:00

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# Authors: Simo Sorce <ssorce@redhat.com>
#
# Copyright (C) 2007 Red Hat
# see file 'COPYING' for use and warranty information
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
import tempfile
import os
import pwd
import netaddr
import re
import sys
import ldap
import installutils
import service
from ipaserver.plugins import ldap2
from ipaserver.install.dsinstance import realm_to_serverid
from ipaserver.install.cainstance import IPA_CA_RECORD
from ipapython import sysrestore, ipautil, ipaldap
from ipapython.ipa_log_manager import *
from ipapython.dn import DN
import ipalib
from ipalib import api, errors
from ipaplatform.paths import paths
from ipalib.util import (validate_zonemgr_str, normalize_zonemgr,
get_dns_forward_zone_update_policy, get_dns_reverse_zone_update_policy,
normalize_zone, get_reverse_zone_default, zone_is_reverse)
from ipalib.constants import CACERT
NAMED_CONF = paths.NAMED_CONF
RESOLV_CONF = paths.RESOLV_CONF
named_conf_section_ipa_start_re = re.compile('\s*dynamic-db\s+"ipa"\s+{')
named_conf_section_options_start_re = re.compile('\s*options\s+{')
named_conf_section_end_re = re.compile('};')
named_conf_arg_ipa_re = re.compile(r'(?P<indent>\s*)arg\s+"(?P<name>\S+)\s(?P<value>[^"]+)";')
named_conf_arg_options_re = re.compile(r'(?P<indent>\s*)(?P<name>\S+)\s+"(?P<value>[^"]+)"\s*;')
named_conf_arg_ipa_template = "%(indent)sarg \"%(name)s %(value)s\";\n"
named_conf_arg_options_template = "%(indent)s%(name)s \"%(value)s\";\n"
# non string args for options section
named_conf_arg_options_re_nonstr = re.compile(r'(?P<indent>\s*)(?P<name>\S+)\s+(?P<value>[^"]+)\s*;')
named_conf_arg_options_template_nonstr = "%(indent)s%(name)s %(value)s;\n"
# include directive
named_conf_include_re = re.compile(r'\s*include\s+"(?P<path>)"\s*;')
named_conf_include_template = "include \"%(path)s\";\n"
def check_inst(unattended):
has_bind = True
# So far this file is always present in both RHEL5 and Fedora if all the necessary
# bind packages are installed (RHEL5 requires also the pkg: caching-nameserver)
if not os.path.exists(paths.NAMED_RFC1912_ZONES):
print "BIND was not found on this system"
print "Please install the 'bind' package and start the installation again"
has_bind = False
# Also check for the LDAP BIND plug-in
if not os.path.exists(paths.BIND_LDAP_SO) and \
not os.path.exists(paths.BIND_LDAP_SO_64):
print "The BIND LDAP plug-in was not found on this system"
print "Please install the 'bind-dyndb-ldap' package and start the installation again"
has_bind = False
if not has_bind:
return False
if not unattended and os.path.exists(NAMED_CONF):
msg = "Existing BIND configuration detected, overwrite?"
return ipautil.user_input(msg, False)
return True
def create_reverse():
return ipautil.user_input("Do you want to configure the reverse zone?", True)
def named_conf_exists():
try:
named_fd = open(NAMED_CONF, 'r')
except IOError:
return False
lines = named_fd.readlines()
named_fd.close()
for line in lines:
if line.startswith('dynamic-db "ipa"'):
return True
return False
NAMED_SECTION_OPTIONS = "options"
NAMED_SECTION_IPA = "ipa"
def named_conf_get_directive(name, section=NAMED_SECTION_IPA, str_val=True):
"""Get a configuration option in bind-dyndb-ldap section of named.conf
:str_val - set to True if directive value is string
(only for NAMED_SECTION_OPTIONS)
"""
if section == NAMED_SECTION_IPA:
named_conf_section_start_re = named_conf_section_ipa_start_re
named_conf_arg_re = named_conf_arg_ipa_re
elif section == NAMED_SECTION_OPTIONS:
named_conf_section_start_re = named_conf_section_options_start_re
if str_val:
named_conf_arg_re = named_conf_arg_options_re
else:
named_conf_arg_re = named_conf_arg_options_re_nonstr
else:
raise NotImplementedError('Section "%s" is not supported' % section)
with open(NAMED_CONF, 'r') as f:
target_section = False
for line in f:
if named_conf_section_start_re.match(line):
target_section = True
continue
if named_conf_section_end_re.match(line):
if target_section:
break
if target_section:
match = named_conf_arg_re.match(line)
if match and name == match.group('name'):
return match.group('value')
def named_conf_set_directive(name, value, section=NAMED_SECTION_IPA,
str_val=True):
"""
Set configuration option in bind-dyndb-ldap section of named.conf.
When the configuration option with given name does not exist, it
is added at the end of ipa section in named.conf.
If the value is set to None, the configuration option is removed
from named.conf.
:str_val - set to True if directive value is string
(only for NAMED_SECTION_OPTIONS)
"""
new_lines = []
if section == NAMED_SECTION_IPA:
named_conf_section_start_re = named_conf_section_ipa_start_re
named_conf_arg_re = named_conf_arg_ipa_re
named_conf_arg_template = named_conf_arg_ipa_template
elif section == NAMED_SECTION_OPTIONS:
named_conf_section_start_re = named_conf_section_options_start_re
if str_val:
named_conf_arg_re = named_conf_arg_options_re
named_conf_arg_template = named_conf_arg_options_template
else:
named_conf_arg_re = named_conf_arg_options_re_nonstr
named_conf_arg_template = named_conf_arg_options_template_nonstr
else:
raise NotImplementedError('Section "%s" is not supported' % section)
with open(NAMED_CONF, 'r') as f:
target_section = False
matched = False
last_indent = "\t"
for line in f:
if named_conf_section_start_re.match(line):
target_section = True
if named_conf_section_end_re.match(line):
if target_section and not matched and \
value is not None:
# create a new conf
new_conf = named_conf_arg_template \
% dict(indent=last_indent,
name=name,
value=value)
new_lines.append(new_conf)
target_section = False
if target_section and not matched:
match = named_conf_arg_re.match(line)
if match:
last_indent = match.group('indent')
if name == match.group('name'):
matched = True
if value is not None:
if not isinstance(value, basestring):
value = str(value)
new_conf = named_conf_arg_template \
% dict(indent=last_indent,
name=name,
value=value)
new_lines.append(new_conf)
continue
new_lines.append(line)
# write new configuration
with open(NAMED_CONF, 'w') as f:
f.write("".join(new_lines))
def named_conf_include_exists(path):
"""
Check if include exists in named.conf
:param path: path in include directive
:return: True if include exists, else False
"""
with open(NAMED_CONF, 'r') as f:
for line in f:
match = named_conf_include_re.match(line)
if match and path == match.group('path'):
return True
return False
def named_conf_add_include(path):
"""
append include at the end of file
:param path: path to be insert to include directive
"""
with open(NAMED_CONF, 'a') as f:
f.write(named_conf_include_template % {'path': path})
def dns_container_exists(fqdn, suffix, dm_password=None, ldapi=False, realm=None,
autobind=ipaldap.AUTOBIND_DISABLED):
"""
Test whether the dns container exists.
"""
assert isinstance(suffix, DN)
try:
# At install time we may need to use LDAPI to avoid chicken/egg
# issues with SSL certs and truting CAs
if ldapi:
conn = ipaldap.IPAdmin(host=fqdn, ldapi=True, realm=realm)
else:
conn = ipaldap.IPAdmin(host=fqdn, port=636, cacert=CACERT)
conn.do_bind(dm_password, autobind=autobind)
except ldap.SERVER_DOWN:
raise RuntimeError('LDAP server on %s is not responding. Is IPA installed?' % fqdn)
ret = conn.entry_exists(DN(('cn', 'dns'), suffix))
conn.unbind()
return ret
def dns_zone_exists(name):
try:
zone = api.Command.dnszone_show(unicode(name))
except ipalib.errors.NotFound:
return False
if len(zone) == 0:
return False
else:
return True
def get_reverse_record_name(zone, ip_address):
ip = netaddr.IPAddress(ip_address)
rev = '.' + normalize_zone(zone)
fullrev = '.' + normalize_zone(ip.reverse_dns)
if not fullrev.endswith(rev):
raise ValueError("IP address does not match reverse zone")
return fullrev[1:-len(rev)]
def verify_reverse_zone(zone, ip_address):
try:
get_reverse_record_name(zone, ip_address)
except ValueError:
return False
return True
def find_reverse_zone(ip_address):
ip = netaddr.IPAddress(ip_address)
zone = normalize_zone(ip.reverse_dns)
while len(zone) > 0:
if dns_zone_exists(zone):
return zone
foo, bar, zone = zone.partition('.')
return None
def get_reverse_zone(ip_address):
return find_reverse_zone(ip_address) or get_reverse_zone_default(ip_address)
def read_reverse_zone(default, ip_address):
while True:
zone = ipautil.user_input("Please specify the reverse zone name", default=default)
if not zone:
return None
if verify_reverse_zone(zone, ip_address):
break
else:
print "Invalid reverse zone %s for IP address %s" % (zone, ip_address)
return normalize_zone(zone)
def add_zone(name, zonemgr=None, dns_backup=None, ns_hostname=None,
update_policy=None, force=False):
# always normalize zones
name = normalize_zone(name)
if update_policy is None:
if zone_is_reverse(name):
update_policy = get_dns_reverse_zone_update_policy(api.env.realm, name)
else:
update_policy = get_dns_forward_zone_update_policy(api.env.realm)
if zonemgr is None:
zonemgr = 'hostmaster.%s' % name
if ns_hostname:
ns_hostname = normalize_zone(ns_hostname)
ns_hostname = unicode(ns_hostname)
try:
api.Command.dnszone_add(unicode(name),
idnssoamname=ns_hostname,
idnssoarname=unicode(zonemgr),
idnsallowdynupdate=True,
idnsupdatepolicy=unicode(update_policy),
idnsallowquery=u'any',
idnsallowtransfer=u'none',
force=force)
except (errors.DuplicateEntry, errors.EmptyModlist):
pass
def add_rr(zone, name, type, rdata, dns_backup=None, **kwargs):
addkw = { '%srecord' % str(type.lower()) : unicode(rdata) }
addkw.update(kwargs)
try:
api.Command.dnsrecord_add(unicode(zone), unicode(name), **addkw)
except (errors.DuplicateEntry, errors.EmptyModlist):
pass
if dns_backup:
dns_backup.add(zone, type, name, rdata)
def add_fwd_rr(zone, host, ip_address):
addr = netaddr.IPAddress(ip_address)
if addr.version == 4:
add_rr(zone, host, "A", ip_address)
elif addr.version == 6:
add_rr(zone, host, "AAAA", ip_address)
def add_ptr_rr(zone, ip_address, fqdn, dns_backup=None):
name = get_reverse_record_name(zone, ip_address)
add_rr(zone, name, "PTR", normalize_zone(fqdn), dns_backup)
def add_ns_rr(zone, hostname, dns_backup=None, force=True):
hostname = normalize_zone(hostname)
add_rr(zone, "@", "NS", hostname, dns_backup=dns_backup,
force=force)
def del_rr(zone, name, type, rdata):
delkw = { '%srecord' % str(type.lower()) : unicode(rdata) }
try:
api.Command.dnsrecord_del(unicode(zone), unicode(name), **delkw)
except (errors.NotFound, errors.AttrValueNotFound, errors.EmptyModlist):
pass
def del_fwd_rr(zone, host, ip_address):
addr = netaddr.IPAddress(ip_address)
if addr.version == 4:
del_rr(zone, host, "A", ip_address)
elif addr.version == 6:
del_rr(zone, host, "AAAA", ip_address)
def del_ns_rr(zone, name, rdata):
del_rr(zone, name, 'NS', rdata)
def get_rr(zone, name, type):
rectype = '%srecord' % unicode(type.lower())
ret = api.Command.dnsrecord_find(unicode(zone), unicode(name))
if ret['count'] > 0:
for r in ret['result']:
if rectype in r:
return r[rectype]
return []
def get_fwd_rr(zone, host):
return [x for t in ("A", "AAAA") for x in get_rr(zone, host, t)]
def zonemgr_callback(option, opt_str, value, parser):
"""
Properly validate and convert --zonemgr Option to IA5String
"""
# validate the value first
try:
validate_zonemgr_str(value)
except ValueError, e:
parser.error("invalid zonemgr: " + unicode(e))
parser.values.zonemgr = value
def check_reverse_zones(ip_addresses, reverse_zones, options, unattended, search_reverse_zones=False):
reverse_asked = False
ret_reverse_zones = []
# check that there is IP address in every reverse zone
if reverse_zones:
for rz in reverse_zones:
for ip in ip_addresses:
if verify_reverse_zone(rz, ip):
ret_reverse_zones.append(normalize_zone(rz))
break
else:
# no ip matching reverse zone found
sys.exit("There is no IP address matching reverse zone %s." % rz)
if not options.no_reverse:
# check that there is reverse zone for every IP
for ip in ip_addresses:
if search_reverse_zones and find_reverse_zone(str(ip)):
# reverse zone is already in LDAP
continue
for rz in ret_reverse_zones:
if verify_reverse_zone(rz, ip):
# reverse zone was entered by user
break
else:
# no reverse zone for ip found
if not reverse_asked:
if not unattended and not reverse_zones:
# user did not specify reverse_zone nor no_reverse
options.no_reverse = not create_reverse()
if options.no_reverse:
# user decided not to create reverse zone
return []
reverse_asked = True
rz = get_reverse_zone_default(str(ip))
if not unattended:
rz = read_reverse_zone(rz, str(ip))
ret_reverse_zones.append(rz)
return ret_reverse_zones
class DnsBackup(object):
def __init__(self, service):
self.service = service
self.zones = {}
def add(self, zone, record_type, host, rdata):
"""
Backup a DNS record in the file store so it can later be removed.
"""
if zone not in self.zones:
zone_id = len(self.zones)
self.zones[zone] = (zone_id, 0)
self.service.backup_state("dns_zone_%s" % zone_id, zone)
(zone_id, record_id) = self.zones[zone]
self.service.backup_state("dns_record_%s_%s" % (zone_id, record_id),
"%s %s %s" % (record_type, host, rdata))
self.zones[zone] = (zone_id, record_id + 1)
def clear_records(self, have_ldap):
"""
Remove all records from the file store. If we are connected to
ldap, we will also remove them there.
"""
i = 0
while True:
zone = self.service.restore_state("dns_zone_%s" % i)
if not zone:
return
j = 0
while True:
dns_record = self.service.restore_state("dns_record_%s_%s" % (i, j))
if not dns_record:
break
if have_ldap:
type, host, rdata = dns_record.split(" ", 2)
try:
delkw = { '%srecord' % str(type.lower()) : unicode(rdata) }
api.Command.dnsrecord_del(unicode(zone), unicode(host), **delkw)
except:
pass
j += 1
i += 1
class BindInstance(service.Service):
def __init__(self, fstore=None, dm_password=None):
service.Service.__init__(self, "named",
service_desc="DNS",
dm_password=dm_password,
ldapi=False,
autobind=ipaldap.AUTOBIND_DISABLED
)
self.dns_backup = DnsBackup(self)
self.named_user = None
self.domain = None
self.host = None
self.ip_addresses = []
self.realm = None
self.forwarders = None
self.sub_dict = None
self.reverse_zones = []
self.dm_password = dm_password
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
suffix = ipautil.dn_attribute_property('_suffix')
def setup(self, fqdn, ip_addresses, realm_name, domain_name, forwarders, ntp,
reverse_zones, named_user="named", zonemgr=None,
ca_configured=None):
self.named_user = named_user
self.fqdn = fqdn
self.ip_addresses = ip_addresses
self.realm = realm_name
self.domain = domain_name
self.forwarders = forwarders
self.host = fqdn.split(".")[0]
self.suffix = ipautil.realm_to_suffix(self.realm)
self.ntp = ntp
self.reverse_zones = reverse_zones
self.ca_configured = ca_configured
if not zonemgr:
self.zonemgr = 'hostmaster.%s' % self.domain
else:
self.zonemgr = normalize_zonemgr(zonemgr)
self.first_instance = not dns_container_exists(
self.fqdn, self.suffix, realm=self.realm, ldapi=True,
dm_password=self.dm_password)
self.__setup_sub_dict()
@property
def host_domain(self):
return self.fqdn.split(".", 1)[1]
@property
def host_in_rr(self):
# when a host is not in a default domain, it needs to be referred
# with FQDN and not in a domain-relative host name
if not self.host_in_default_domain():
return normalize_zone(self.fqdn)
return self.host
def host_in_default_domain(self):
return normalize_zone(self.host_domain) == normalize_zone(self.domain)
def create_sample_bind_zone(self):
bind_txt = ipautil.template_file(ipautil.SHARE_DIR + "bind.zone.db.template", self.sub_dict)
[bind_fd, bind_name] = tempfile.mkstemp(".db","sample.zone.")
os.write(bind_fd, bind_txt)
os.close(bind_fd)
print "Sample zone file for bind has been created in "+bind_name
def create_instance(self):
try:
self.stop()
except:
pass
# get a connection to the DS
self.ldap_connect()
for ip_address in self.ip_addresses:
if installutils.record_in_hosts(str(ip_address), self.fqdn) is None:
installutils.add_record_to_hosts(str(ip_address), self.fqdn)
# Make sure generate-rndc-key.sh runs before named restart
self.step("generating rndc key file", self.__generate_rndc_key)
if self.first_instance:
self.step("adding DNS container", self.__setup_dns_container)
if not dns_zone_exists(self.domain):
self.step("setting up our zone", self.__setup_zone)
if self.reverse_zones:
self.step("setting up reverse zone", self.__setup_reverse_zone)
self.step("setting up our own record", self.__add_self)
if self.first_instance:
self.step("setting up records for other masters", self.__add_others)
# all zones must be created before this step
self.step("adding NS record to the zones", self.__add_self_ns)
self.step("setting up CA record", self.__add_ipa_ca_record)
self.step("setting up kerberos principal", self.__setup_principal)
self.step("setting up named.conf", self.__setup_named_conf)
self.step("restarting named", self.__start)
self.step("configuring named to start on boot", self.__enable)
self.step("changing resolv.conf to point to ourselves", self.__setup_resolv_conf)
self.start_creation()
def __start(self):
try:
self.backup_state("running", self.is_running())
self.restart()
except:
print "named service failed to start"
def __enable(self):
self.backup_state("enabled", self.is_running())
# We do not let the system start IPA components on its own,
# Instead we reply on the IPA init script to start only enabled
# components as found in our LDAP configuration tree
try:
self.ldap_enable('DNS', self.fqdn, self.dm_password, self.suffix)
except errors.DuplicateEntry:
# service already exists (forced DNS reinstall)
# don't crash, just report error
root_logger.error("DNS service already exists")
def __setup_sub_dict(self):
if self.forwarders:
fwds = "\n"
for forwarder in self.forwarders:
fwds += "\t\t%s;\n" % forwarder
fwds += "\t"
else:
fwds = " "
if self.ntp:
optional_ntp = "\n;ntp server\n"
optional_ntp += "_ntp._udp\t\tIN SRV 0 100 123\t%s" % self.host_in_rr
else:
optional_ntp = ""
ipa_ca = ""
for addr in self.ip_addresses:
if addr.version in (4, 6):
ipa_ca += "%s\t\t\tIN %s\t\t\t%s\n" % (
IPA_CA_RECORD,
"A" if addr.version == 4 else "AAAA",
str(addr))
self.sub_dict = dict(
FQDN=self.fqdn,
IP=[str(ip) for ip in self.ip_addresses],
DOMAIN=self.domain,
HOST=self.host,
REALM=self.realm,
SERVER_ID=realm_to_serverid(self.realm),
FORWARDERS=fwds,
SUFFIX=self.suffix,
OPTIONAL_NTP=optional_ntp,
ZONEMGR=self.zonemgr,
IPA_CA_RECORD=ipa_ca,
BINDKEYS_FILE=paths.NAMED_BINDKEYS_FILE,
MANAGED_KEYS_DIR=paths.NAMED_MANAGED_KEYS_DIR,
ROOT_KEY=paths.NAMED_ROOT_KEY,
)
def __setup_dns_container(self):
self._ldap_mod("dns.ldif", self.sub_dict)
def __setup_zone(self):
# Always use force=True as named is not set up yet
add_zone(self.domain, self.zonemgr, dns_backup=self.dns_backup,
ns_hostname=api.env.host, force=True)
add_rr(self.domain, "_kerberos", "TXT", self.realm)
def __add_self_ns(self):
# add NS record to all zones
ns_hostname = normalize_zone(api.env.host)
result = api.Command.dnszone_find()
for zone in result['result']:
zone = unicode(zone['idnsname'][0]) # we need unicode due to backup
root_logger.debug("adding self NS to zone %s apex", zone)
add_ns_rr(zone, ns_hostname, self.dns_backup, force=True)
def __setup_reverse_zone(self):
# Always use force=True as named is not set up yet
for reverse_zone in self.reverse_zones:
add_zone(reverse_zone, self.zonemgr, ns_hostname=api.env.host,
dns_backup=self.dns_backup, force=True)
def __add_master_records(self, fqdn, addrs):
host, zone = fqdn.split(".", 1)
if normalize_zone(zone) == normalize_zone(self.domain):
host_in_rr = host
else:
host_in_rr = normalize_zone(fqdn)
srv_records = (
("_ldap._tcp", "0 100 389 %s" % host_in_rr),
("_kerberos._tcp", "0 100 88 %s" % host_in_rr),
("_kerberos._udp", "0 100 88 %s" % host_in_rr),
("_kerberos-master._tcp", "0 100 88 %s" % host_in_rr),
("_kerberos-master._udp", "0 100 88 %s" % host_in_rr),
("_kpasswd._tcp", "0 100 464 %s" % host_in_rr),
("_kpasswd._udp", "0 100 464 %s" % host_in_rr),
)
if self.ntp:
srv_records += (
("_ntp._udp", "0 100 123 %s" % host_in_rr),
)
for (rname, rdata) in srv_records:
add_rr(self.domain, rname, "SRV", rdata, self.dns_backup)
if not dns_zone_exists(zone):
# add DNS domain for host first
root_logger.debug(
"Host domain (%s) is different from DNS domain (%s)!" % (
zone, self.domain))
root_logger.debug("Add DNS zone for host first.")
add_zone(zone, self.zonemgr, dns_backup=self.dns_backup,
ns_hostname=self.fqdn, force=True)
# Add forward and reverse records to self
for addr in addrs:
add_fwd_rr(zone, host, addr)
reverse_zone = find_reverse_zone(addr)
if reverse_zone:
add_ptr_rr(reverse_zone, addr, fqdn)
def __add_self(self):
self.__add_master_records(self.fqdn, self.ip_addresses)
def __add_others(self):
entries = self.admin_conn.get_entries(
DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'),
self.suffix),
self.admin_conn.SCOPE_ONELEVEL, None, ['dn'])
for entry in entries:
fqdn = entry.dn[0]['cn']
if fqdn == self.fqdn:
continue
addrs = installutils.resolve_host(fqdn)
root_logger.debug("Adding DNS records for master %s" % fqdn)
self.__add_master_records(fqdn, addrs)
def __add_ipa_ca_records(self, fqdn, addrs, ca_configured):
if ca_configured is False:
root_logger.debug("CA is not configured")
return
elif ca_configured is None:
# we do not know if CA is configured for this host and we can
# add the CA record. So we need to find out
root_logger.debug("Check if CA is enabled for this host")
base_dn = DN(('cn', fqdn), ('cn', 'masters'), ('cn', 'ipa'),
('cn', 'etc'), api.env.basedn)
ldap_filter = '(&(objectClass=ipaConfigObject)(cn=CA))'
try:
api.Backend.ldap2.find_entries(filter=ldap_filter, base_dn=base_dn)
except ipalib.errors.NotFound:
root_logger.debug("CA is not configured")
return
else:
root_logger.debug("CA is configured for this host")
try:
for addr in addrs:
add_fwd_rr(self.domain, IPA_CA_RECORD, addr)
except errors.ValidationError:
# there is a CNAME record in ipa-ca, we can't add A/AAAA records
pass
def __add_ipa_ca_record(self):
self.__add_ipa_ca_records(self.fqdn, self.ip_addresses,
self.ca_configured)
if self.first_instance:
ldap = api.Backend.ldap2
try:
entries = ldap.get_entries(
DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'),
api.env.basedn),
ldap.SCOPE_SUBTREE, '(&(objectClass=ipaConfigObject)(cn=CA))',
['dn'])
except errors.NotFound:
root_logger.debug('No server with CA found')
entries = []
for entry in entries:
fqdn = entry.dn[1]['cn']
if fqdn == self.fqdn:
continue
host, zone = fqdn.split('.', 1)
if dns_zone_exists(zone):
addrs = get_fwd_rr(zone, host)
else:
addrs = installutils.resolve_host(fqdn)
self.__add_ipa_ca_records(fqdn, addrs, True)
def __setup_principal(self):
dns_principal = "DNS/" + self.fqdn + "@" + self.realm
installutils.kadmin_addprinc(dns_principal)
# Store the keytab on disk
self.fstore.backup_file(paths.NAMED_KEYTAB)
installutils.create_keytab(paths.NAMED_KEYTAB, dns_principal)
p = self.move_service(dns_principal)
if p is None:
# the service has already been moved, perhaps we're doing a DNS reinstall
dns_principal = DN(('krbprincipalname', dns_principal),
('cn', 'services'), ('cn', 'accounts'), self.suffix)
else:
dns_principal = p
# Make sure access is strictly reserved to the named user
pent = pwd.getpwnam(self.named_user)
os.chown(paths.NAMED_KEYTAB, pent.pw_uid, pent.pw_gid)
os.chmod(paths.NAMED_KEYTAB, 0400)
# modify the principal so that it is marked as an ipa service so that
# it can host the memberof attribute, then also add it to the
# dnsserver role group, this way the DNS is allowed to perform
# DNS Updates
dns_group = DN(('cn', 'DNS Servers'), ('cn', 'privileges'), ('cn', 'pbac'), self.suffix)
mod = [(ldap.MOD_ADD, 'member', dns_principal)]
try:
self.admin_conn.modify_s(dns_group, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
pass
except Exception, e:
root_logger.critical("Could not modify principal's %s entry: %s" \
% (dns_principal, str(e)))
raise
# bind-dyndb-ldap persistent search feature requires both size and time
# limit-free connection
mod = [(ldap.MOD_REPLACE, 'nsTimeLimit', '-1'),
(ldap.MOD_REPLACE, 'nsSizeLimit', '-1'),
(ldap.MOD_REPLACE, 'nsIdleTimeout', '-1'),
(ldap.MOD_REPLACE, 'nsLookThroughLimit', '-1')]
try:
self.admin_conn.modify_s(dns_principal, mod)
except Exception, e:
root_logger.critical("Could not set principal's %s LDAP limits: %s" \
% (dns_principal, str(e)))
raise
def __setup_named_conf(self):
self.fstore.backup_file(NAMED_CONF)
named_txt = ipautil.template_file(ipautil.SHARE_DIR + "bind.named.conf.template", self.sub_dict)
named_fd = open(NAMED_CONF, 'w')
named_fd.seek(0)
named_fd.truncate(0)
named_fd.write(named_txt)
named_fd.close()
def __setup_resolv_conf(self):
self.fstore.backup_file(RESOLV_CONF)
resolv_txt = "search "+self.domain+"\n"
for ip_address in self.ip_addresses:
if ip_address.version == 4:
resolv_txt += "nameserver 127.0.0.1\n"
break
for ip_address in self.ip_addresses:
if ip_address.version == 6:
resolv_txt += "nameserver ::1\n"
break
try:
resolv_fd = open(RESOLV_CONF, 'w')
resolv_fd.seek(0)
resolv_fd.truncate(0)
resolv_fd.write(resolv_txt)
resolv_fd.close()
except IOError as e:
root_logger.error('Could not write to resolv.conf: %s', e)
def __generate_rndc_key(self):
installutils.check_entropy()
ipautil.run(['/usr/libexec/generate-rndc-key.sh'])
def add_master_dns_records(self, fqdn, ip_addresses, realm_name, domain_name,
reverse_zones, ntp=False, ca_configured=None):
self.fqdn = fqdn
self.ip_addresses = ip_addresses
self.realm = realm_name
self.domain = domain_name
self.host = fqdn.split(".")[0]
self.suffix = ipautil.realm_to_suffix(self.realm)
self.ntp = ntp
self.reverse_zones = reverse_zones
self.ca_configured = ca_configured
self.first_instance = False
self.zonemgr = 'hostmaster.%s' % self.domain
self.__add_self()
self.__add_ipa_ca_record()
def add_ipa_ca_dns_records(self, fqdn, domain_name, ca_configured=True):
host, zone = fqdn.split(".", 1)
if dns_zone_exists(zone):
addrs = get_fwd_rr(zone, host)
else:
addrs = installutils.resolve_host(fqdn)
self.domain = domain_name
self.__add_ipa_ca_records(fqdn, addrs, ca_configured)
def convert_ipa_ca_cnames(self, domain_name):
# get ipa-ca CNAMEs
cnames = get_rr(domain_name, IPA_CA_RECORD, "CNAME")
if not cnames:
return
root_logger.info('Converting IPA CA CNAME records to A/AAAA records')
# create CNAME to FQDN mapping
cname_fqdn = {}
for cname in cnames:
if cname.endswith('.'):
fqdn = cname[:-1]
else:
fqdn = '%s.%s' % (cname, domain_name)
cname_fqdn[cname] = fqdn
# get FQDNs of all IPA masters
ldap = api.Backend.ldap2
try:
entries = ldap.get_entries(
DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'),
api.env.basedn),
ldap.SCOPE_ONELEVEL, None, ['cn'])
masters = set(e['cn'][0] for e in entries)
except errors.NotFound:
masters = set()
# check if all CNAMEs point to IPA masters
for cname in cnames:
fqdn = cname_fqdn[cname]
if fqdn not in masters:
root_logger.warning(
"Cannot convert IPA CA CNAME records to A/AAAA records, "
"please convert them manually if necessary")
return
# delete all CNAMEs
for cname in cnames:
del_rr(domain_name, IPA_CA_RECORD, "CNAME", cname)
# add A/AAAA records
for cname in cnames:
fqdn = cname_fqdn[cname]
self.add_ipa_ca_dns_records(fqdn, domain_name, None)
def remove_master_dns_records(self, fqdn, realm_name, domain_name):
host, zone = fqdn.split(".", 1)
self.host = host
self.fqdn = fqdn
self.domain = domain_name
suffix = ipautil.realm_to_suffix(realm_name)
resource_records = (
("_ldap._tcp", "SRV", "0 100 389 %s" % self.host_in_rr),
("_kerberos._tcp", "SRV", "0 100 88 %s" % self.host_in_rr),
("_kerberos._udp", "SRV", "0 100 88 %s" % self.host_in_rr),
("_kerberos-master._tcp", "SRV", "0 100 88 %s" % self.host_in_rr),
("_kerberos-master._udp", "SRV", "0 100 88 %s" % self.host_in_rr),
("_kpasswd._tcp", "SRV", "0 100 464 %s" % self.host_in_rr),
("_kpasswd._udp", "SRV", "0 100 464 %s" % self.host_in_rr),
("_ntp._udp", "SRV", "0 100 123 %s" % self.host_in_rr),
)
for (record, type, rdata) in resource_records:
del_rr(self.domain, record, type, rdata)
areclist = get_fwd_rr(zone, host)
for rdata in areclist:
del_fwd_rr(zone, host, rdata)
rzone = find_reverse_zone(rdata)
if rzone is not None:
record = get_reverse_record_name(rzone, rdata)
del_rr(rzone, record, "PTR", normalize_zone(fqdn))
def remove_ipa_ca_dns_records(self, fqdn, domain_name):
host, zone = fqdn.split(".", 1)
if dns_zone_exists(zone):
addrs = get_fwd_rr(zone, host)
else:
addrs = installutils.resolve_host(fqdn)
for addr in addrs:
del_fwd_rr(domain_name, IPA_CA_RECORD, addr)
def remove_server_ns_records(self, fqdn):
"""
Remove all NS records pointing to this server
"""
ldap = api.Backend.ldap2
ns_rdata = normalize_zone(fqdn)
# find all NS records pointing to this server
search_kw = {}
search_kw['nsrecord'] = ns_rdata
attr_filter = ldap.make_filter(search_kw, rules=ldap.MATCH_ALL)
attributes = ['idnsname', 'objectclass']
dn = DN(api.env.container_dns, api.env.basedn)
entries, truncated = ldap.find_entries(attr_filter, attributes, base_dn=dn)
# remove records
if entries:
root_logger.debug("Removing all NS records pointing to %s:", ns_rdata)
for entry in entries:
if 'idnszone' in entry['objectclass']:
# zone record
zone = entry.single_value['idnsname']
root_logger.debug("zone record %s", zone)
del_ns_rr(zone, u'@', ns_rdata)
else:
zone = entry.dn[1].value # get zone from DN
record = entry.single_value['idnsname']
root_logger.debug("record %s in zone %s", record, zone)
del_ns_rr(zone, record, ns_rdata)
def check_global_configuration(self):
"""
Check global DNS configuration in LDAP server and inform user when it
set and thus overrides his configured options in named.conf.
"""
result = api.Command.dnsconfig_show()
global_conf_set = any(param in result['result'] for \
param in api.Object['dnsconfig'].params)
if not global_conf_set:
print "Global DNS configuration in LDAP server is empty"
print "You can use 'dnsconfig-mod' command to set global DNS options that"
print "would override settings in local named.conf files"
return
print "Global DNS configuration in LDAP server is not empty"
print "The following configuration options override local settings in named.conf:"
print ""
textui = ipalib.cli.textui()
api.Command.dnsconfig_show.output_for_cli(textui, result, None, reverse=False)
def uninstall(self):
if self.is_configured():
self.print_msg("Unconfiguring %s" % self.service_name)
running = self.restore_state("running")
enabled = self.restore_state("enabled")
self.dns_backup.clear_records(api.Backend.ldap2.isconnected())
if not running is None:
self.stop()
for f in [NAMED_CONF, RESOLV_CONF]:
try:
self.fstore.restore_file(f)
except ValueError, error:
root_logger.debug(error)
pass
if not enabled is None and not enabled:
self.disable()
if not running is None and running:
self.start()
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