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Let Bind track data changes

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Integrate new bind-dyndb-ldap features to automatically track
DNS data changes:

 1) Zone refresh
    Set --zone-refresh in installation to define number of seconds
    between bind-dyndb-ldap polls for new DNS zones. User now
    doesn't have to restart name server when a new zone is added.

 2) New zone notifications
    Use LDAP persistent search mechanism to immediately get
    notification when any new DNS zone is added. Use --zone-notif
    install option to enable. This option is mutually exclusive
    with Zone refresh.

To enable this functionality in existing IPA installations,
update a list of arguments for bind-dyndb-ldap in /etc/named.conf.
An example when zone refresh is disabled and DNS data change
notifications (argument psearch of bind-dyndb-ldap) are enabled:

dynamic-db "ipa" {
...
        arg "zone_refresh 0";
        arg "psearch yes";
};

This patch requires bind-dyndb-ldap-1.0.0-0.1.b1 or later.

https://fedorahosted.org/freeipa/ticket/826
This commit is contained in:
Martin Kosek 2011-08-31 14:42:57 +02:00
parent ca1ca17cb6
commit 6a2dfde086
7 changed files with 64 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
install/share/bind.named.conf.template
View File

@ -44,4 +44,6 @@ dynamic-db "ipa" {
arg "auth_method sasl";
arg "sasl_mech GSSAPI";
arg "sasl_user DNS/$FQDN";
arg "zone_refresh $ZONE_REFRESH";
arg "psearch $PERSISTENT_SEARCH";
};

20
install/tools/ipa-dns-install
View File

@ -29,6 +29,7 @@ from ipapython import version
from ipapython import ipautil, sysrestore
from ipalib import api, errors, util
from ipapython.config import IPAOptionParser
from ipalib.constants import DNS_ZONE_REFRESH
import krbV
import ldap
@ -49,6 +50,14 @@ def parse_options():
default=False, help="Do not create reverse DNS zone")
parser.add_option("--zonemgr", dest="zonemgr",
help="DNS zone manager e-mail address. Defaults to root")
parser.add_option("--zone-notif", dest="zone_notif",
action="store_true", default=False,
help="Let name server receive notification when a new zone is added." \
"Zone refresh is turned off when zone notification is enabled")
parser.add_option("--zone-refresh", dest="zone_refresh",
default=DNS_ZONE_REFRESH, type="int",
help="A delay between checks for new DNS zones. Defaults to %d" \
% DNS_ZONE_REFRESH)
parser.add_option("-U", "--unattended", dest="unattended", action="store_true",
default=False, help="unattended installation never prompts the user")
@ -64,6 +73,12 @@ def parse_options():
if not options.forwarders and not options.no_forwarders:
parser.error("You must specify at least one --forwarder option or --no-forwarders option")
if options.zone_refresh < 0:
parser.error("negative numbers not allowed for --zone-refresh")
if options.zone_notif: # mutually exclusive features
options.zone_refresh = 0
return safe_options, options
def main():
@ -179,7 +194,10 @@ def main():
print "Please wait until the prompt is returned."
print ""
bind.setup(api.env.host, ip_address, api.env.realm, api.env.domain, dns_forwarders, conf_ntp, reverse_zone, zonemgr=options.zonemgr)
bind.setup(api.env.host, ip_address, api.env.realm, api.env.domain,
dns_forwarders, conf_ntp, reverse_zone, zonemgr=options.zonemgr,
zone_refresh=options.zone_refresh,
zone_notif=options.zone_notif)
bind.create_instance()

20
install/tools/ipa-server-install
View File

@ -61,6 +61,7 @@ from ipalib.parameters import IA5Str
from ipapython.config import IPAOptionParser
from ipalib.dn import DN
from ipalib.x509 import load_certificate_from_file, load_certificate_chain_from_file
from ipalib.constants import DNS_ZONE_REFRESH
pw_name = None
uninstalling = False
@ -140,6 +141,14 @@ def parse_options():
parser.add_option("--zonemgr", action="callback", callback=zonemgr_callback,
type="string",
help="DNS zone manager e-mail address. Defaults to root")
parser.add_option("--zone-notif", dest="zone_notif",
action="store_true", default=False,
help="Let name server receive notification when a new zone is added." \
"Zone refresh is turned off when zone notification is enabled")
parser.add_option("--zone-refresh", dest="zone_refresh",
default=DNS_ZONE_REFRESH, type="int",
help="A delay between checks for new DNS zones. Defaults to %d" \
% DNS_ZONE_REFRESH)
parser.add_option("-U", "--unattended", dest="unattended", action="store_true",
default=False, help="unattended installation never prompts the user")
parser.add_option("", "--uninstall", dest="uninstall", action="store_true",
@ -247,6 +256,12 @@ def parse_options():
if not options.pkinit_pkcs12 and not options.selfsign:
options.setup_pkinit = False
if options.zone_refresh < 0:
parser.error("negative numbers not allowed for --zone-refresh")
if options.zone_notif: # these 2 features are mutually exclusive
options.zone_refresh = 0
return safe_options, options
def signal_handler(signum, frame):
@ -992,7 +1007,10 @@ def main():
# Create a BIND instance
bind = bindinstance.BindInstance(fstore, dm_password)
bind.setup(host_name, ip_address, realm_name, domain_name, dns_forwarders, options.conf_ntp, reverse_zone, zonemgr=options.zonemgr)
bind.setup(host_name, ip_address, realm_name, domain_name, dns_forwarders,
options.conf_ntp, reverse_zone, zonemgr=options.zonemgr,
zone_refresh=options.zone_refresh,
zone_notif=options.zone_notif)
if options.setup_dns:
api.Backend.ldap2.connect(bind_dn="cn=Directory Manager", bind_pw=dm_password)

6
install/tools/man/ipa-dns-install.1
View File

@ -49,6 +49,12 @@ Do not create reverse DNS zone
\fB\-\-zonemgr\fR
The e\-mail address of the DNS zone manager. Defaults too root@host.domain
.TP
\fB\-\-zone\-notif\fR
Let name server receive notifications when a new zone is added. New zone is then immediately loaded by the name server. This feature uses an LDAP Persistent Search mechanism to receive the data. Zone refresh is turned off when zone notifications are enabled.
.TP
\fB\-\-zone\-refresh=\fIZONE_REFRESH\fR
Number of seconds between regular checks for new DNS zones. When set to 0 the name server does not check for new zones and it needs to be reloaded when a new DNS zone is added.
.TP
\fB\-U\fR, \fB\-\-unattended\fR
An unattended installation that will never prompt for user input
.SH "EXIT STATUS"

6
install/tools/man/ipa-server-install.1
View File

@ -88,6 +88,12 @@ Do not create reverse DNS zone
\fB\-\-zonemgr\fR
The e\-mail address of the DNS zone manager. Defaults to root@host.domain
.TP
\fB\-\-zone\-notif\fR
Let name server receive notifications when a new zone is added. New zone is then immediately loaded by the name server. This feature uses an LDAP Persistent Search mechanism to receive the data. Zone refresh is turned off when zone notifications are enabled.
.TP
\fB\-\-zone\-refresh=\fIZONE_REFRESH\fR
Number of seconds between regular checks for new DNS zones. When set to 0 the name server does not check for new zones and it needs to be reloaded when a new DNS zone is added.
.TP
\fB\-U\fR, \fB\-\-unattended\fR
An unattended installation that will never prompt for user input
.TP

3
ipalib/constants.py
View File

@ -195,3 +195,6 @@ DEFAULT_CONFIG = (
('log', object), # Path to context specific log file
)
# Default DNS zone refresh interval in seconds (0 = disabled)
DNS_ZONE_REFRESH = 30

11
ipaserver/install/bindinstance.py
View File

@ -31,6 +31,7 @@ from ipaserver.install.dsinstance import realm_to_serverid
from ipaserver.install.installutils import resolve_host
from ipapython import sysrestore
from ipapython import ipautil
from ipalib.constants import DNS_ZONE_REFRESH
import ipalib
from ipalib import api, util, errors
@ -342,7 +343,9 @@ class BindInstance(service.Service):
else:
self.fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')
def setup(self, fqdn, ip_address, realm_name, domain_name, forwarders, ntp, reverse_zone, named_user="named", zonemgr=None):
def setup(self, fqdn, ip_address, realm_name, domain_name, forwarders, ntp,
reverse_zone, named_user="named", zonemgr=None,
zone_refresh=DNS_ZONE_REFRESH, zone_notif=False):
self.named_user = named_user
self.fqdn = fqdn
self.ip_address = ip_address
@ -354,6 +357,8 @@ class BindInstance(service.Service):
self.suffix = util.realm_to_suffix(self.realm)
self.ntp = ntp
self.reverse_zone = reverse_zone
self.zone_refresh = zone_refresh
self.zone_notif = zone_notif
if zonemgr:
self.zonemgr = zonemgr.replace('@','.')
@ -439,7 +444,9 @@ class BindInstance(service.Service):
FORWARDERS=fwds,
SUFFIX=self.suffix,
OPTIONAL_NTP=optional_ntp,
ZONEMGR=self.zonemgr)
ZONEMGR=self.zonemgr,
ZONE_REFRESH=self.zone_refresh,
PERSISTENT_SEARCH=self.zone_notif and "yes" or "no")
def __setup_dns_container(self):
self._ldap_mod("dns.ldif", self.sub_dict)