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52aa008b87
Global DNS configuration is a nice tool to maintain a common DNS settings stored in LDAP which are then used for all enrolled IPA servers. However, the settings stored in LDAP override local settings in named.conf on DNS servers. This patch adds more information about global DNS configuration options in install scripts and DNS module help. https://fedorahosted.org/freeipa/ticket/2525
269 lines
11 KiB
Python
Executable File
269 lines
11 KiB
Python
Executable File
#! /usr/bin/python -E
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# Authors: Martin Nagy <mnagy@redhat.com>
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# Based on ipa-server-install by Karl MacMillan <kmacmillan@mentalrootkit.com>
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#
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# Copyright (C) 2007 - 2009 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import traceback
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from ipaserver.plugins.ldap2 import ldap2
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from ipaserver.install import service, bindinstance, ntpinstance, httpinstance
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from ipaserver.install.installutils import *
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from ipaserver.install import installutils
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from ipapython import version
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from ipapython import ipautil, sysrestore
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from ipalib import api, errors, util
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from ipapython.config import IPAOptionParser
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from ipalib.constants import DNS_ZONE_REFRESH
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import krbV
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import ldap
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from ipapython.ipa_log_manager import *
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def parse_options():
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parser = IPAOptionParser(version=version.VERSION)
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parser.add_option("-p", "--ds-password", dest="dm_password",
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sensitive=True, help="admin password")
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parser.add_option("-d", "--debug", dest="debug", action="store_true",
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default=False, help="print debugging information")
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parser.add_option("--ip-address", dest="ip_address",
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type="ip", ip_local=True, help="Master Server IP Address")
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parser.add_option("--forwarder", dest="forwarders", action="append",
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type="ip", help="Add a DNS forwarder")
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parser.add_option("--no-forwarders", dest="no_forwarders", action="store_true",
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default=False, help="Do not add any DNS forwarders, use root servers instead")
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parser.add_option("--reverse-zone", dest="reverse_zone", help="The reverse DNS zone to use")
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parser.add_option("--no-reverse", dest="no_reverse", action="store_true",
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default=False, help="Do not create new reverse DNS zone")
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parser.add_option("--zonemgr", action="callback", callback=bindinstance.zonemgr_callback,
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type="string",
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help="DNS zone manager e-mail address. Defaults to hostmaster@DOMAIN")
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parser.add_option("--zone-notif", dest="zone_notif",
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action="store_true", default=False,
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help="Let name server receive notification when a new zone is added." \
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"Zone refresh is turned off when zone notification is enabled")
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parser.add_option("--zone-refresh", dest="zone_refresh",
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default=DNS_ZONE_REFRESH, type="int",
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help="A delay between checks for new DNS zones. Defaults to %d" \
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% DNS_ZONE_REFRESH)
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parser.add_option("-U", "--unattended", dest="unattended", action="store_true",
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default=False, help="unattended installation never prompts the user")
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options, args = parser.parse_args()
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safe_options = parser.get_safe_opts(options)
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if options.forwarders and options.no_forwarders:
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parser.error("You cannot specify a --forwarder option together with --no-forwarders")
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elif options.reverse_zone and options.no_reverse:
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parser.error("You cannot specify a --reverse-zone option together with --no-reverse")
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if options.unattended:
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if not options.forwarders and not options.no_forwarders:
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parser.error("You must specify at least one --forwarder option or --no-forwarders option")
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if options.zone_refresh < 0:
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parser.error("negative numbers not allowed for --zone-refresh")
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if options.zone_notif: # mutually exclusive features
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options.zone_refresh = 0
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return safe_options, options
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def main():
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safe_options, options = parse_options()
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if os.getegid() != 0:
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sys.exit("Must be root to setup server")
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standard_logging_setup("/var/log/ipaserver-install.log", debug=options.debug, filemode='a')
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print "\nThe log file for this installation can be found in /var/log/ipaserver-install.log"
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root_logger.debug('%s was invoked with options: %s' % (sys.argv[0], safe_options))
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root_logger.debug("missing options might be asked for interactively later\n")
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installutils.check_server_configuration()
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global fstore
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fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')
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print "=============================================================================="
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print "This program will setup DNS for the FreeIPA Server."
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print ""
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print "This includes:"
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print " * Configure DNS (bind)"
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print ""
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print "To accept the default shown in brackets, press the Enter key."
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print ""
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# Check bind packages are installed
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if not bindinstance.check_inst(options.unattended):
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sys.exit("Aborting installation.")
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# Initialize the ipalib api
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cfg = dict(
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in_server=True,
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debug=options.debug,
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)
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api.bootstrap(**cfg)
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api.finalize()
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if bindinstance.named_conf_exists():
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sys.exit("\nDNS is already configured in this IPA server.")
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# Create a BIND instance
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if options.unattended and not options.dm_password:
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sys.exit("\nIn unattended mode you need to provide at least the -p option")
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dm_password = options.dm_password or read_password("Directory Manager",
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confirm=False, validate=False)
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if dm_password is None:
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sys.exit("\nDirectory Manager password required")
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bind = bindinstance.BindInstance(fstore, dm_password)
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# try the connection
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try:
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bind.ldap_connect()
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bind.ldap_disconnect()
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except ldap.INVALID_CREDENTIALS, e:
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sys.exit("Password is not valid!")
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# Check we have a public IP that is associated with the hostname
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if options.ip_address:
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ip = options.ip_address
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else:
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hostaddr = resolve_host(api.env.host)
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try:
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if len(hostaddr) > 1:
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print >> sys.stderr, "The server hostname resolves to more than one address:"
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for addr in hostaddr:
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print >> sys.stderr, " %s" % addr
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if options.ip_address:
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if str(options.ip_address) not in hostaddr:
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print >> sys.stderr, "Address passed in --ip-address did not match any resolved"
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print >> sys.stderr, "address!"
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sys.exit(1)
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print "Selected IP address:", str(options.ip_address)
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ip = options.ip_address
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else:
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if options.unattended:
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print >> sys.stderr, "Please use --ip-address option to specify the address"
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sys.exit(1)
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else:
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ip = read_ip_address(api.env.host, fstore)
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else:
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ip = hostaddr and ipautil.CheckedIPAddress(hostaddr[0], match_local=True)
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except Exception, e:
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print "Error: Invalid IP Address %s: %s" % (ip, e)
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ip = None
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if not ip:
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if options.unattended:
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sys.exit("Unable to resolve IP address for host name")
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else:
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ip = read_ip_address(api.env.host, fstore)
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ip_address = str(ip)
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root_logger.debug("will use ip_address: %s\n", ip_address)
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if options.reverse_zone and not bindinstance.verify_reverse_zone(options.reverse_zone, ip):
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sys.exit(1)
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if options.no_forwarders:
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dns_forwarders = ()
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elif options.forwarders:
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dns_forwarders = options.forwarders
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else:
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dns_forwarders = read_dns_forwarders()
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root_logger.debug("will use dns_forwarders: %s\n", str(dns_forwarders))
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if bind.dm_password:
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api.Backend.ldap2.connect(bind_dn="cn=Directory Manager", bind_pw=bind.dm_password)
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else:
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# See if our LDAP server is up and we can talk to it over GSSAPI
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ccache = krbV.default_context().default_ccache().name
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api.Backend.ldap2.connect(ccache)
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if options.reverse_zone:
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reverse_zone = bindinstance.normalize_zone(options.reverse_zone)
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else:
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reverse_zone = bindinstance.find_reverse_zone(ip)
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if reverse_zone is None and not options.no_reverse:
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reverse_zone = bindinstance.get_reverse_zone_default(ip)
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if not options.unattended and bindinstance.create_reverse():
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reverse_zone = bindinstance.read_reverse_zone(reverse_zone, ip)
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if reverse_zone is not None:
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print "Using reverse zone %s" % reverse_zone
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conf_ntp = ntpinstance.NTPInstance(fstore).is_enabled()
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if not options.unattended:
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print ""
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print "The following operations may take some minutes to complete."
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print "Please wait until the prompt is returned."
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print ""
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bind.setup(api.env.host, ip_address, api.env.realm, api.env.domain,
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dns_forwarders, conf_ntp, reverse_zone, zonemgr=options.zonemgr,
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zone_refresh=options.zone_refresh,
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zone_notif=options.zone_notif)
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bind.create_instance()
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# Restart http instance to make sure acutil has the right resolver
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# https://bugzilla.redhat.com/show_bug.cgi?id=800368
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http = httpinstance.HTTPInstance(fstore)
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service.print_msg("Restarting the web server")
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http.restart()
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print "=============================================================================="
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print "Setup complete"
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print ""
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bind.check_global_configuration()
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print ""
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print ""
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print "\tYou must make sure these network ports are open:"
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print "\t\tTCP Ports:"
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print "\t\t * 53: bind"
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print "\t\tUDP Ports:"
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print "\t\t * 53: bind"
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return 0
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try:
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sys.exit(main())
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except SystemExit, e:
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sys.exit(e)
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except KeyboardInterrupt:
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print "Installation cancelled."
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except RuntimeError, e:
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print str(e)
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except HostnameLocalhost:
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print "The hostname resolves to the localhost address (127.0.0.1/::1)"
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print "Please change your /etc/hosts file so that the hostname"
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print "resolves to the ip address of your network interface."
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print "The KDC service does not listen on localhost"
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print ""
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print "Please fix your /etc/hosts file and restart the setup program"
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except Exception, e:
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message = "Unexpected error - see ipaserver-install.log for details:\n %s" % str(e)
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print message
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message = str(e)
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for str in traceback.format_tb(sys.exc_info()[2]):
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message = message + "\n" + str
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root_logger.debug(message)
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sys.exit(1)
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