freeipa/install/tools/ipa-server-install

#! /usr/bin/python -E
# Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
#          Simo Sorce <ssorce@redhat.com>
#          Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2007-2010  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/>.
#


# requires the following packages:
# fedora-ds-base
# openldap-clients
# nss-tools

import sys
import os
import errno
import grp
import subprocess
import signal
import shutil
import glob
import pickle
import random
import tempfile
import nss.error
from optparse import OptionGroup, OptionValueError, SUPPRESS_HELP

from ipaserver.install import dsinstance
from ipaserver.install import krbinstance
from ipaserver.install import bindinstance
from ipaserver.install import httpinstance
from ipaserver.install import ntpinstance
from ipaserver.install import certs
from ipaserver.install import cainstance
from ipaserver.install import memcacheinstance
from ipaserver.install import sysupgrade

from ipaserver.install import service, installutils
from ipapython import version
from ipaserver.install.installutils import *
from ipaserver.plugins.ldap2 import ldap2

from ipapython import sysrestore
from ipapython.ipautil import *
from ipapython import ipautil
from ipapython import dogtag
from ipalib import api, errors, util
from ipapython.config import IPAOptionParser
from ipalib.x509 import load_certificate_from_file, load_certificate_chain_from_file
from ipalib.util import validate_domain_name
from ipapython import services as ipaservices
from ipapython.ipa_log_manager import *
from ipapython.dn import DN

pw_name = None
uninstalling = False
installation_cleanup = True

VALID_SUBJECT_ATTRS = ['st', 'o', 'ou', 'dnqualifier', 'c',
                       'serialnumber', 'l', 'title', 'sn', 'givenname',
                       'initials', 'generationqualifier', 'dc', 'mail',
                       'uid', 'postaladdress', 'postalcode', 'postofficebox',
                       'houseidentifier', 'e', 'street', 'pseudonym',
                       'incorporationlocality', 'incorporationstate',
                       'incorporationcountry', 'businesscategory']

def subject_callback(option, opt_str, value, parser):
    """
    Make sure the certificate subject base is a valid DN
    """
    v = unicode(value, 'utf-8')
    if any(ord(c) < 0x20 for c in v):
        raise OptionValueError("Subject base must not contain control characters")
    if '&' in v:
        raise OptionValueError("Subject base must not contain an ampersand (\"&\")")
    try:
        dn = DN(v)
        for rdn in dn:
            if rdn.attr.lower() not in VALID_SUBJECT_ATTRS:
                raise OptionValueError('%s=%s has invalid attribute: "%s"' % (opt_str, value, rdn.attr))
    except ValueError, e:
        raise OptionValueError('%s=%s has invalid subject base format: %s' % (opt_str, value, e))
    parser.values.subject = dn

def validate_dm_password(password):
    if len(password) < 8:
        raise ValueError("Password must be at least 8 characters long")
    if any(ord(c) < 0x20 for c in password):
        raise ValueError("Password must not contain control characters")
    if any(ord(c) >= 0x7F for c in password):
        raise ValueError("Password must only contain ASCII characters")

    # Disallow characters that pkisilent doesn't process properly:
    bad_characters = ' &\\<'
    if any(c in bad_characters for c in password):
        raise ValueError('Password must not contain these characters: %s' %
            ', '.join('"%s"' % c for c in bad_characters))

def parse_options():
    # Guaranteed to give a random 200k range below the 2G mark (uint32_t limit)
    namespace = random.randint(1, 10000) * 200000
    parser = IPAOptionParser(version=version.VERSION)

    basic_group = OptionGroup(parser, "basic options")
    basic_group.add_option("-r", "--realm", dest="realm_name",
                      help="realm name")
    basic_group.add_option("-n", "--domain", dest="domain_name",
                      help="domain name")
    basic_group.add_option("-p", "--ds-password", dest="dm_password",
                      sensitive=True, help="admin password")
    basic_group.add_option("-P", "--master-password",
                      dest="master_password", sensitive=True,
                      help="kerberos master password (normally autogenerated)")
    basic_group.add_option("-a", "--admin-password",
                      sensitive=True, dest="admin_password",
                      help="admin user kerberos password")
    basic_group.add_option("--hostname", dest="host_name", help="fully qualified name of server")
    basic_group.add_option("--ip-address", dest="ip_address",
                      type="ip", ip_local=True,
                      help="Master Server IP Address")
    basic_group.add_option("-N", "--no-ntp", dest="conf_ntp", action="store_false",
                      help="do not configure ntp", default=True)
    basic_group.add_option("--idstart", dest="idstart", default=namespace, type=int,
                      help="The starting value for the IDs range (default random)")
    basic_group.add_option("--idmax", dest="idmax", default=0, type=int,
                      help="The max value value for the IDs range (default: idstart+199999)")
    basic_group.add_option("--no_hbac_allow", dest="hbac_allow", default=False,
                      action="store_true",
                      help="Don't install allow_all HBAC rule")
    basic_group.add_option("--no-ui-redirect", dest="ui_redirect", action="store_false",
                      default=True, help="Do not automatically redirect to the Web UI")
    basic_group.add_option("--ssh-trust-dns", dest="trust_sshfp", default=False, action="store_true",
                      help="configure OpenSSH client to trust DNS SSHFP records")
    basic_group.add_option("--no-ssh", dest="conf_ssh", default=True, action="store_false",
                      help="do not configure OpenSSH client")
    basic_group.add_option("--no-sshd", dest="conf_sshd", default=True, action="store_false",
                      help="do not configure OpenSSH server")
    basic_group.add_option("-d", "--debug", dest="debug", action="store_true",
                      default=False, help="print debugging information")
    basic_group.add_option("-U", "--unattended", dest="unattended", action="store_true",
                      default=False, help="unattended (un)installation never prompts the user")
    parser.add_option_group(basic_group)

    cert_group = OptionGroup(parser, "certificate system options")
    cert_group.add_option("", "--external-ca", dest="external_ca", action="store_true",
                      default=False, help="Generate a CSR to be signed by an external CA")
    cert_group.add_option("", "--external_cert_file", dest="external_cert_file",
                      help="File containing PKCS#10 certificate")
    cert_group.add_option("", "--external_ca_file", dest="external_ca_file",
                      help="File containing PKCS#10 of the external CA chain")
    cert_group.add_option("--no-pkinit", dest="setup_pkinit", action="store_false",
                      default=True, help="disables pkinit setup steps")
    cert_group.add_option("--dirsrv_pkcs12", dest="dirsrv_pkcs12",
                      help="PKCS#12 file containing the Directory Server SSL certificate")
    cert_group.add_option("--http_pkcs12", dest="http_pkcs12",
                      help="PKCS#12 file containing the Apache Server SSL certificate")
    cert_group.add_option("--pkinit_pkcs12", dest="pkinit_pkcs12",
                      help="PKCS#12 file containing the Kerberos KDC SSL certificate")
    cert_group.add_option("--dirsrv_pin", dest="dirsrv_pin", sensitive=True,
                      help="The password of the Directory Server PKCS#12 file")
    cert_group.add_option("--http_pin", dest="http_pin", sensitive=True,
                      help="The password of the Apache Server PKCS#12 file")
    cert_group.add_option("--pkinit_pin", dest="pkinit_pin",
                      help="The password of the Kerberos KDC PKCS#12 file")
    cert_group.add_option("--subject", action="callback", callback=subject_callback,
                      type="string",
                      help="The certificate subject base (default O=<realm-name>)")
    cert_group.add_option("", "--selfsign", dest="selfsign", action="store_true",
                      default=False, help="Configure a self-signed CA instance rather than a dogtag CA. " \
                      "WARNING: Certificate management capabilities will be limited")
    parser.add_option_group(cert_group)

    dns_group = OptionGroup(parser, "DNS options")
    dns_group.add_option("--setup-dns", dest="setup_dns", action="store_true",
                      default=False, help="configure bind with our zone")
    dns_group.add_option("--forwarder", dest="forwarders", action="append",
                      type="ip", help="Add a DNS forwarder")
    dns_group.add_option("--no-forwarders", dest="no_forwarders", action="store_true",
                      default=False, help="Do not add any DNS forwarders, use root servers instead")
    dns_group.add_option("--reverse-zone", dest="reverse_zone", help="The reverse DNS zone to use")
    dns_group.add_option("--no-reverse", dest="no_reverse", action="store_true",
                      default=False, help="Do not create reverse DNS zone")
    dns_group.add_option("--zonemgr", action="callback", callback=bindinstance.zonemgr_callback,
                      type="string",
                      help="DNS zone manager e-mail address. Defaults to hostmaster@DOMAIN")
    # this option name has been deprecated, persistent search has been enabled by default
    dns_group.add_option("--zone-notif", dest="zone_notif",
                      action="store_true", default=False, help=SUPPRESS_HELP)
    dns_group.add_option("--no-persistent-search", dest="persistent_search",
                      default=True, action="store_false",
                      help="Do not enable persistent search feature in the name server")
    dns_group.add_option("--zone-refresh", dest="zone_refresh",
                      default=0, type="int",
                      help="When set to non-zero the name server will use DNS zone "
                           "detection based on polling instead of a persistent search")
    dns_group.add_option("--no-host-dns", dest="no_host_dns", action="store_true",
                      default=False,
                      help="Do not use DNS for hostname lookup during installation")
    dns_group.add_option("--no-dns-sshfp", dest="create_sshfp", default=True, action="store_false",
                      help="Do not automatically create DNS SSHFP records")
    dns_group.add_option("--no-serial-autoincrement", dest="serial_autoincrement",
                      default=True, action="store_false",
                      help="Do not enable SOA serial autoincrement")
    parser.add_option_group(dns_group)

    uninstall_group = OptionGroup(parser, "uninstall options")
    uninstall_group.add_option("", "--uninstall", dest="uninstall", action="store_true",
                      default=False, help="uninstall an existing installation. The uninstall can " \
                                          "be run with --unattended option")
    parser.add_option_group(uninstall_group)

    options, args = parser.parse_args()
    safe_options = parser.get_safe_opts(options)

    if options.dm_password is not None:
        try:
            validate_dm_password(options.dm_password)
        except ValueError, e:
            parser.error("DS admin password: " + str(e))
    if options.admin_password is not None and len(options.admin_password) < 8:
        parser.error("Admin user password must be at least 8 characters long")

    if options.domain_name is not None:
        try:
            validate_domain_name(options.domain_name)
        except ValueError, e:
            parser.error("invalid domain: " + unicode(e))

    if not options.setup_dns:
        if options.forwarders:
            parser.error("You cannot specify a --forwarder option without the --setup-dns option")
        if options.no_forwarders:
            parser.error("You cannot specify a --no-forwarders option without the --setup-dns option")
        if options.reverse_zone:
            parser.error("You cannot specify a --reverse-zone option without the --setup-dns option")
        if options.no_reverse:
            parser.error("You cannot specify a --no-reverse option without the --setup-dns option")
    elif options.forwarders and options.no_forwarders:
        parser.error("You cannot specify a --forwarder option together with --no-forwarders")
    elif options.reverse_zone and options.no_reverse:
        parser.error("You cannot specify a --reverse-zone option together with --no-reverse")

    if options.uninstall:
        if (options.realm_name or
            options.admin_password or options.master_password):
            parser.error("In uninstall mode, -a, -r and -P options are not allowed")
    elif options.unattended:
        if (not options.realm_name or
            not options.dm_password or not options.admin_password):
            parser.error("In unattended mode you need to provide at least -r, -p and -a options")
        if options.setup_dns:
            if not options.forwarders and not options.no_forwarders:
                parser.error("You must specify at least one --forwarder option or --no-forwarders option")

    # If any of the PKCS#12 options are selected, all are required. Create a
    # list of the options and count it to enforce that all are required without
    # having a huge set of it blocks.
    pkcs12 = [options.dirsrv_pkcs12, options.http_pkcs12, options.dirsrv_pin, options.http_pin]
    cnt = pkcs12.count(None)
    if cnt > 0 and cnt < 4:
        parser.error("All PKCS#12 options are required if any are used.")

    if (options.external_cert_file or options.external_ca_file) and options.selfsign:
        parser.error("--selfsign cannot be used with the external CA options.")

    if options.external_ca:
        if options.external_cert_file:
            parser.error("You cannot specify --external_cert_file together with --external-ca")
        if options.external_ca_file:
            parser.error("You cannot specify --external_ca_file together with --external-ca")

    if ((options.external_cert_file and not options.external_ca_file) or
       (not options.external_cert_file and options.external_ca_file)):
        parser.error("if either external CA option is used, both are required.")

    if (options.external_ca_file and not os.path.isabs(options.external_ca_file)):
        parser.error("--external-ca-file must use an absolute path")
    if (options.external_cert_file and not os.path.isabs(options.external_cert_file)):
        parser.error("--external-cert-file must use an absolute path")

    if options.idmax == 0:
        options.idmax = int(options.idstart) + 200000 - 1

    if options.idmax < options.idstart:
        parser.error("idmax (%u) cannot be smaller than idstart (%u)" %
                    (options.idmax, options.idstart))

    #Automatically disable pkinit w/ dogtag until that is supported
    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")
    elif options.zone_refresh > 0:
        options.persistent_search = False   # mutually exclusive features

    if options.serial_autoincrement and not options.persistent_search:
        parser.error('persistent search feature is required for '
                     'DNS SOA serial autoincrement')

    if options.zone_notif:
        print >>sys.stderr, "WARNING: --zone-notif option is deprecated and has no effect"

    return safe_options, options

def signal_handler(signum, frame):
    global ds
    print "\nCleaning up..."
    if ds:
        print "Removing configuration for %s instance" % ds.serverid
        ds.stop()
        if ds.serverid:
            dsinstance.erase_ds_instance_data (ds.serverid)
    sys.exit(1)

ANSWER_CACHE = "/root/.ipa_cache"

def read_cache(dm_password):
    """
    Returns a dict of cached answers or empty dict if no cache file exists.
    """
    if not ipautil.file_exists(ANSWER_CACHE):
        return {}

    top_dir = tempfile.mkdtemp("ipa")
    fname = "%s/cache" % top_dir
    try:
        decrypt_file(ANSWER_CACHE, fname, dm_password, top_dir)
    except Exception, e:
        shutil.rmtree(top_dir)
        raise Exception("Decryption of answer cache in %s failed, please check your password." % ANSWER_CACHE)

    try:
        with open(fname, 'rb') as f:
            try:
                optdict = pickle.load(f)
            except Exception, e:
                raise Exception("Parse error in %s: %s" % (ANSWER_CACHE, str(e)))
    except IOError, e:
        raise Exception("Read error in %s: %s" % (ANSWER_CACHE, str(e)))
    finally:
        shutil.rmtree(top_dir)

    # These are the only ones that may be overridden
    for opt in ('external_ca_file', 'external_cert_file'):
        try:
            del optdict[opt]
        except KeyError:
            pass

    return optdict

def write_cache(options):
    """
    Takes a dict as input and writes a cached file of answers
    """
    top_dir = tempfile.mkdtemp("ipa")
    fname = "%s/cache" % top_dir
    try:
        with open(fname, 'wb') as f:
            pickle.dump(options, f)
        ipautil.encrypt_file(fname, ANSWER_CACHE, options['dm_password'], top_dir)
    except IOError, e:
        raise Exception("Unable to cache command-line options %s" % str(e))
    finally:
        shutil.rmtree(top_dir)

def read_host_name(host_default,no_host_dns=False):
    host_name = ""

    print "Enter the fully qualified domain name of the computer"
    print "on which you're setting up server software. Using the form"
    print "<hostname>.<domainname>"
    print "Example: master.example.com."
    print ""
    print ""
    if host_default == "":
        host_default = "master.example.com"
    host_name = user_input("Server host name", host_default, allow_empty = False)
    print ""
    verify_fqdn(host_name,no_host_dns)

    return host_name

def read_domain_name(domain_name, unattended):
    print "The domain name has been determined based on the host name."
    print ""
    if not unattended:
        domain_name = user_input("Please confirm the domain name", domain_name)
        print ""
    return domain_name

def read_realm_name(domain_name, unattended):
    print "The kerberos protocol requires a Realm name to be defined."
    print "This is typically the domain name converted to uppercase."
    print ""

    if unattended:
        return domain_name.upper()
    realm_name = user_input("Please provide a realm name", domain_name.upper())
    upper_dom = realm_name.upper()  #pylint: disable=E1103
    if upper_dom != realm_name:
        print "An upper-case realm name is required."
        if not user_input("Do you want to use " + upper_dom + " as realm name?", True):
            print ""
            print "An upper-case realm name is required. Unable to continue."
            sys.exit(1)
        else:
            realm_name = upper_dom
        print ""
    return realm_name


def read_dm_password():
    print "Certain directory server operations require an administrative user."
    print "This user is referred to as the Directory Manager and has full access"
    print "to the Directory for system management tasks and will be added to the"
    print "instance of directory server created for IPA."
    print "The password must be at least 8 characters long."
    print ""
    #TODO: provide the option of generating a random password
    dm_password = read_password("Directory Manager", validator=validate_dm_password)
    return dm_password

def read_admin_password():
    print "The IPA server requires an administrative user, named 'admin'."
    print "This user is a regular system account used for IPA server administration."
    print ""
    #TODO: provide the option of generating a random password
    admin_password = read_password("IPA admin")
    return admin_password

def check_dirsrv(unattended):
    (ds_unsecure, ds_secure) = dsinstance.check_ports()
    if not ds_unsecure or not ds_secure:
        print "IPA requires ports 389 and 636 for the Directory Server."
        print "These are currently in use:"
        if not ds_unsecure:
            print "\t389"
        if not ds_secure:
            print "\t636"
        sys.exit(1)

def uninstall():

    rv = 0

    print "Shutting down all IPA services"
    try:
        (stdout, stderr, rc) = run(["/usr/sbin/ipactl", "stop"], raiseonerr=False)
    except Exception, e:
        pass

    # Need to get dogtag info before /etc/ipa/default.conf is removed
    dogtag_constants = dogtag.configured_constants()

    print "Removing IPA client configuration"
    try:
        (stdout, stderr, rc) = run(["/usr/sbin/ipa-client-install", "--on-master", "--unattended", "--uninstall"], raiseonerr=False)
        if rc not in [0,2]:
            root_logger.debug("ipa-client-install returned %d" % rc)
            raise RuntimeError(stdout)
    except Exception, e:
        rv = 1
        print "Uninstall of client side components failed!"
        print "ipa-client-install returned: " + str(e)

    ntpinstance.NTPInstance(fstore).uninstall()
    cads_instance = cainstance.CADSInstance(dogtag_constants=dogtag_constants)
    if cads_instance.is_configured():
        cads_instance.uninstall()
    ca_instance = cainstance.CAInstance(
        api.env.realm, certs.NSS_DIR, dogtag_constants=dogtag_constants)
    if ca_instance.is_configured():
        ca_instance.uninstall()
    bindinstance.BindInstance(fstore).uninstall()
    httpinstance.HTTPInstance(fstore).uninstall()
    krbinstance.KrbInstance(fstore).uninstall()
    dsinstance.DsInstance(fstore=fstore).uninstall()
    memcacheinstance.MemcacheInstance().uninstall()
    fstore.restore_all_files()
    try:
        os.remove(ANSWER_CACHE)
    except Exception:
        pass

    # ipa-client-install removes /etc/ipa/default.conf

    sstore._load()
    group_exists = sstore.restore_state("install", "group_exists")

    ipaservices.knownservices.ipa.disable()

    old_hostname = sstore.restore_state('network','hostname')
    system_hostname = get_fqdn()
    if old_hostname is not None and old_hostname != system_hostname:
        try:
            ipautil.run(['/bin/hostname', old_hostname])
        except CalledProcessError, e:
            print >>sys.stderr, "Failed to set this machine hostname back to %s (%s)." % (old_hostname, str(e))

    # remove upgrade state file
    sysupgrade.remove_upgrade_file()

    if fstore.has_files():
        root_logger.error('Some files have not been restored, see /var/lib/ipa/sysrestore/sysrestore.index')
    has_state = False
    for module in IPA_MODULES: # from installutils
        if sstore.has_state(module):
            root_logger.error('Some installation state for %s has not been restored, see /var/lib/ipa/sysrestore/sysrestore.state' % module)
            has_state = True
            rv = 1

    if has_state:
        root_logger.warning('Some installation state has not been restored.\nThis will cause re-installation to fail.\nIt should be safe to remove /var/lib/ipa/sysrestore.state but it may\nmean your system hasn\'t be restored to its pre-installation state.')

    return rv


def set_subject_in_config(realm_name, dm_password, suffix, subject_base):
        ldapuri = 'ldapi://%%2fvar%%2frun%%2fslapd-%s.socket' % (
            dsinstance.realm_to_serverid(realm_name)
        )
        try:
            conn = ldap2(shared_instance=False, ldap_uri=ldapuri, base_dn=suffix)
            conn.connect(bind_dn=DN(('cn', 'directory manager')), bind_pw=dm_password)
        except errors.ExecutionError, e:
            root_logger.critical("Could not connect to the Directory Server on %s" % realm_name)
            raise e
        (dn, entry_attrs) = conn.get_ipa_config()
        if 'ipacertificatesubjectbase' not in entry_attrs:
            mod = {'ipacertificatesubjectbase': str(subject_base)}
            conn.update_entry(dn, mod)
        conn.disconnect()

def main():
    global ds
    global pw_name
    global uninstalling
    global installation_cleanup
    ds = None

    safe_options, options = parse_options()

    if os.getegid() != 0:
        sys.exit("Must be root to set up server")

    ipaservices.check_selinux_status()

    signal.signal(signal.SIGTERM, signal_handler)
    signal.signal(signal.SIGINT, signal_handler)

    if options.uninstall:
        uninstalling = True
        standard_logging_setup("/var/log/ipaserver-uninstall.log", debug=options.debug)
        installation_cleanup = False
    else:
        standard_logging_setup("/var/log/ipaserver-install.log", debug=options.debug)
        print "\nThe log file for this installation can be found in /var/log/ipaserver-install.log"
        if not options.external_ca and not options.external_cert_file and is_ipa_configured():
            installation_cleanup = False
            sys.exit("IPA server is already configured on this system.\n"
                     + "If you want to reinstall the IPA server please uninstall it first.")

        client_fstore = sysrestore.FileStore('/var/lib/ipa-client/sysrestore')
        if client_fstore.has_files():
            installation_cleanup = False
            sys.exit("IPA client is already configured on this system.\n"
                     + "Please uninstall it first before configuring the IPA server.")

    root_logger.debug('%s was invoked with options: %s' % (sys.argv[0], safe_options))
    root_logger.debug("missing options might be asked for interactively later\n")

    global fstore
    fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')
    global sstore
    sstore = sysrestore.StateFile('/var/lib/ipa/sysrestore')

    # Configuration for ipalib, we will bootstrap and finalize later, after
    # we are sure we have the configuration file ready.
    cfg = dict(
        context='installer',
        in_server=True,
        debug=options.debug
    )

    if options.uninstall:

        # We will need at least api.env, finalize api now. This system is
        # already installed, so the configuration file is there.
        api.bootstrap(**cfg)
        api.finalize()

        if not options.unattended:
            print "\nThis is a NON REVERSIBLE operation and will delete all data and configuration!\n"
            if not user_input("Are you sure you want to continue with the uninstall procedure?", False):
                print ""
                print "Aborting uninstall operation."
                sys.exit(1)

        return uninstall()

    if options.external_ca:
        if cainstance.CADSInstance().is_configured():
            print "CA is already installed.\nRun the installer with --external_cert_file and --external_ca_file."
            sys.exit(1)
    elif options.external_cert_file:
        if not cainstance.CADSInstance().is_configured():
            # This can happen if someone passes external_ca_file without
            # already having done the first stage of the CA install.
            print "CA is not installed yet. To install with an external CA is a two-stage process.\nFirst run the installer with --external-ca."
            sys.exit(1)

    # This will override any settings passed in on the cmdline
    if ipautil.file_exists(ANSWER_CACHE):
        if options.dm_password is not None:
            dm_password = options.dm_password
        else:
            dm_password = read_password("Directory Manager", confirm=False)
        if dm_password is None:
            sys.exit("\nDirectory Manager password required")
        try:
            options._update_loose(read_cache(dm_password))
        except Exception, e:
            sys.exit("Cannot process the cache file: %s" % str(e))

    if options.external_cert_file:
        try:
            extcert = load_certificate_from_file(options.external_cert_file)
        except IOError, e:
            print "Can't load the PKCS#10 certificate: %s." % str(e)
            sys.exit(1)
        except nss.error.NSPRError:
            print "'%s' is not a valid PEM-encoded certificate." % options.external_cert_file
            sys.exit(1)

        certsubject = DN(str(extcert.subject))
        wantsubject = DN(('CN','Certificate Authority'), options.subject)
        if certsubject != wantsubject:
            print "Subject of the PKCS#10 certificate is not correct (got %s, expected %s)." % (certsubject, wantsubject)
            sys.exit(1)

        try:
            extchain = load_certificate_chain_from_file(options.external_ca_file)
        except IOError, e:
            print "Can't load the external CA chain: %s." % str(e)
            sys.exit(1)
        except nss.error.NSPRError:
            print "'%s' is not a valid PEM-encoded certificate chain." % options.external_ca_file
            sys.exit(1)

        certdict = dict((DN(str(cert.subject)), cert) for cert in extchain)
        certissuer = DN(str(extcert.issuer))
        if certissuer not in certdict:
            print "The PKCS#10 certificate is not signed by the external CA (unknown issuer %s)." % certissuer
            sys.exit(1)

        cert = extcert
        while cert.issuer != cert.subject:
            certissuer = DN(str(cert.issuer))
            if certissuer not in certdict:
                print "The external CA chain is incomplete (%s is missing from the chain)." % certissuer
                sys.exit(1)
            cert = certdict[certissuer]

    print "=============================================================================="
    print "This program will set up the FreeIPA Server."
    print ""
    print "This includes:"
    if options.selfsign:
        print "  * Configure NSS to handle a self-signed CA"
        print "    WARNING: certificate management capabilities will be limited"
    else:
        print "  * Configure a stand-alone CA (dogtag) for certificate management"
    if options.conf_ntp:
        print "  * Configure the Network Time Daemon (ntpd)"
    print "  * Create and configure an instance of Directory Server"
    print "  * Create and configure a Kerberos Key Distribution Center (KDC)"
    print "  * Configure Apache (httpd)"
    if options.setup_dns:
        print "  * Configure DNS (bind)"
    if options.setup_pkinit:
        print "  * Configure the KDC to enable PKINIT"
    if not options.conf_ntp:
        print ""
        print "Excluded by options:"
        print "  * Configure the Network Time Daemon (ntpd)"
    print ""
    print "To accept the default shown in brackets, press the Enter key."
    print ""

    # Make sure the 389-ds ports are available
    check_dirsrv(options.unattended)

    realm_name = ""
    host_name = ""
    domain_name = ""
    ip_address = ""
    master_password = ""
    dm_password = ""
    admin_password = ""
    reverse_zone = None

    # check bind packages are installed
    if options.setup_dns:
        if not bindinstance.check_inst(options.unattended):
            sys.exit("Aborting installation")

        # Don't require an external DNS to say who we are if we are
        # setting up a local DNS server.
        options.no_host_dns = True

    # check the hostname is correctly configured, it must be as the kldap
    # utilities just use the hostname as returned by getaddrinfo to set
    # up some of the standard entries

    host_default = ""
    if options.host_name:
        host_default = options.host_name
    else:
        host_default = get_fqdn()

    try:
        if options.unattended:
            verify_fqdn(host_default,options.no_host_dns)
            host_name = host_default
        else:
            host_name = read_host_name(host_default,options.no_host_dns)
    except BadHostError, e:
        sys.exit(str(e) + "\n")

    host_name = host_name.lower()
    root_logger.debug("will use host_name: %s\n" % host_name)

    system_hostname = get_fqdn()
    if host_name != system_hostname:
        print >>sys.stderr
        print >>sys.stderr, "Warning: hostname %s does not match system hostname %s." \
                            % (host_name, system_hostname)
        print >>sys.stderr, "System hostname will be updated during the installation process"
        print >>sys.stderr, "to prevent service failures."
        print >>sys.stderr

    if not options.domain_name:
        domain_name = read_domain_name(host_name[host_name.find(".")+1:], options.unattended)
        root_logger.debug("read domain_name: %s\n" % domain_name)
        try:
            validate_domain_name(domain_name)
        except ValueError, e:
            sys.exit("Invalid domain name: %s" % unicode(e))
    else:
        domain_name = options.domain_name

    domain_name = domain_name.lower()

    ip = get_server_ip_address(host_name, fstore, options.unattended, options)
    ip_address = str(ip)

    if options.reverse_zone and not bindinstance.verify_reverse_zone(options.reverse_zone, ip):
        sys.exit(1)

    if not options.realm_name:
        realm_name = read_realm_name(domain_name, options.unattended)
        root_logger.debug("read realm_name: %s\n" % realm_name)
    else:
        realm_name = options.realm_name.upper()

    if not options.subject:
        options.subject = DN(('O', realm_name))

    if not options.dm_password:
        dm_password = read_dm_password()

        if dm_password is None:
            sys.exit("\nDirectory Manager password required")
    else:
        dm_password = options.dm_password

    if not options.master_password:
        master_password = ipa_generate_password()
    else:
        master_password = options.master_password

    if not options.admin_password:
        admin_password = read_admin_password()
        if admin_password is None:
            sys.exit("\nIPA admin password required")
    else:
        admin_password = options.admin_password

    if options.setup_dns:
        if options.no_forwarders:
            dns_forwarders = ()
        elif options.forwarders:
            dns_forwarders = options.forwarders
        else:
            dns_forwarders = read_dns_forwarders()

        if options.reverse_zone:
            reverse_zone = bindinstance.normalize_zone(options.reverse_zone)
        elif not options.no_reverse:
            reverse_zone = util.get_reverse_zone_default(ip)
            if not options.unattended and bindinstance.create_reverse():
                reverse_zone = bindinstance.read_reverse_zone(reverse_zone, ip)

        if reverse_zone is not None:
            print "Using reverse zone %s" % reverse_zone
    else:
        dns_forwarders = ()
    root_logger.debug("will use dns_forwarders: %s\n" % str(dns_forwarders))

    print
    print "The IPA Master Server will be configured with:"
    print "Hostname:      %s" % host_name
    print "IP address:    %s" % ip_address
    print "Domain name:   %s" % domain_name
    print "Realm name:    %s" % realm_name
    print

    if options.setup_dns:
        print "BIND DNS server will be configured to serve IPA domain with:"
        print "Forwarders:    %s" % ("No forwarders" if not dns_forwarders \
                else ", ".join([str(ip) for ip in dns_forwarders]))
        print "Reverse zone:  %s" % ("No reverse zone" if options.no_reverse \
                else reverse_zone)
        print

    if not options.unattended and not user_input("Continue to configure the system with these values?", False):
        sys.exit("Installation aborted")

    # Installation has started. No IPA sysrestore items are restored in case of
    # failure to enable root cause investigation
    installation_cleanup = False

    # Create the management framework config file and finalize api
    target_fname = '/etc/ipa/default.conf'
    fd = open(target_fname, "w")
    fd.write("[global]\n")
    fd.write("host=%s\n" % host_name)
    fd.write("basedn=%s\n" % ipautil.realm_to_suffix(realm_name))
    fd.write("realm=%s\n" % realm_name)
    fd.write("domain=%s\n" % domain_name)
    fd.write("xmlrpc_uri=https://%s/ipa/xml\n" % format_netloc(host_name))
    fd.write("ldap_uri=ldapi://%%2fvar%%2frun%%2fslapd-%s.socket\n" % dsinstance.realm_to_serverid(realm_name))
    fd.write("enable_ra=True\n")
    if not options.selfsign:
        fd.write("ra_plugin=dogtag\n")
        fd.write("dogtag_version=%s\n" %
            dogtag.install_constants.DOGTAG_VERSION)
    fd.write("mode=production\n")
    fd.close()

    # Must be readable for everyone
    os.chmod(target_fname, 0644)

    api.bootstrap(**cfg)
    api.finalize()

    if not options.unattended:
        print ""
        print "The following operations may take some minutes to complete."
        print "Please wait until the prompt is returned."
        print ""

    if host_name != system_hostname:
        root_logger.debug("Chosen hostname (%s) differs from system hostname (%s) - change it" \
                      % (host_name, system_hostname))
        # configure /etc/sysconfig/network to contain the custom hostname
        ipaservices.backup_and_replace_hostname(fstore, sstore, host_name)

    # Create DS group if it doesn't exist yet
    try:
        grp.getgrnam(dsinstance.DS_GROUP)
        root_logger.debug("ds group %s exists" % dsinstance.DS_GROUP)
    except KeyError:
        args = ["/usr/sbin/groupadd", "-r", dsinstance.DS_GROUP]
        try:
            ipautil.run(args)
            root_logger.debug("done adding DS group")
        except ipautil.CalledProcessError, e:
            root_logger.critical("failed to add DS group: %s" % e)

    # Configure ntpd
    if options.conf_ntp:
        ntp = ntpinstance.NTPInstance(fstore)
        if not ntp.is_configured():
            ntp.create_instance()

    if options.selfsign:
        ca = certs.CertDB(realm_name, host_name=host_name,
                          subject_base=options.subject)
        ca.create_self_signed()
    else:
        # Clean up any previous self-signed CA that may exist
        try:
            os.remove(certs.CA_SERIALNO)
        except:
            pass

        # Figure out what state we're in. See cainstance.py for more info on
        # the 3 states.
        if options.external_cert_file:
            external = 2
        elif options.external_ca:
            external = 1
        else:
            external = 0

        cs = cainstance.CADSInstance(host_name, realm_name, domain_name, dm_password)
        if not cs.is_configured():
            cs.create_instance(realm_name, host_name, domain_name, dm_password, subject_base=options.subject)
        ca = cainstance.CAInstance(realm_name, certs.NSS_DIR,
            dogtag_constants=dogtag.install_constants)
        if external == 0:
            ca.configure_instance(host_name, dm_password, dm_password,
                                  subject_base=options.subject)
        elif external == 1:
            # stage 1 of external CA installation
            options.realm_name = realm_name
            options.domain_name = domain_name
            options.master_password = master_password
            options.dm_password = dm_password
            options.admin_password = admin_password
            options.host_name = host_name
            options.unattended = True
            options.forwarders = dns_forwarders
            options.reverse_zone = reverse_zone
            write_cache(vars(options))
            ca.configure_instance(host_name, dm_password, dm_password,
                                  csr_file="/root/ipa.csr",
                                  subject_base=options.subject)
        else:
            # stage 2 of external CA installation
            ca.configure_instance(host_name, dm_password, dm_password,
                                  cert_file=options.external_cert_file,
                                  cert_chain_file=options.external_ca_file,
                                  subject_base=options.subject)

    # Now put the CA cert where other instances exepct it
    ca.publish_ca_cert("/etc/ipa/ca.crt")

    # Create a directory server instance
    ds = dsinstance.DsInstance(fstore=fstore)

    if options.dirsrv_pin:
        [pw_fd, pw_name] = tempfile.mkstemp()
        os.write(pw_fd, options.dirsrv_pin)
        os.close(pw_fd)

    if options.dirsrv_pkcs12:
        pkcs12_info = (options.dirsrv_pkcs12, pw_name)
        try:
            ds.create_instance(realm_name, host_name, domain_name,
                               dm_password, pkcs12_info,
                               subject_base=options.subject,
                               hbac_allow=not options.hbac_allow)
        finally:
            os.remove(pw_name)
    else:
        ds.create_instance(realm_name, host_name, domain_name,
                           dm_password, self_signed_ca=options.selfsign,
                           idstart=options.idstart, idmax=options.idmax,
                           subject_base=options.subject,
                           hbac_allow=not options.hbac_allow)

    # We need to ldap_enable the CA now that DS is up and running
    if not options.selfsign:
        ca.ldap_enable('CA', host_name, dm_password,
                       ipautil.realm_to_suffix(realm_name))

        # Turn on SSL in the dogtag LDAP instance. This will get restarted
        # later, we don't need SSL now.
        cs.create_certdb()
        cs.enable_ssl()
        # Add the IPA service for storing the PKI-IPA server certificate.
        cs.add_simple_service(cs.principal)
        cs.add_cert_to_service()

    # Create a kerberos instance
    if options.pkinit_pin:
        [pw_fd, pw_name] = tempfile.mkstemp()
        os.write(pw_fd, options.dirsrv_pin)
        os.close(pw_fd)

    krb = krbinstance.KrbInstance(fstore)
    if options.pkinit_pkcs12:
        pkcs12_info = (options.pkinit_pkcs12, pw_name)
        krb.create_instance(realm_name, host_name, domain_name,
                            dm_password, master_password,
                            setup_pkinit=options.setup_pkinit,
                            pkcs12_info=pkcs12_info,
                            subject_base=options.subject)
    else:
        krb.create_instance(realm_name, host_name, domain_name,
                            dm_password, master_password,
                            setup_pkinit=options.setup_pkinit,
                            self_signed_ca=options.selfsign,
                            subject_base=options.subject)

    if options.pkinit_pin:
        os.remove(pw_name)

    # The DS instance is created before the keytab, add the SSL cert we
    # generated
    ds.add_cert_to_service()

    # Create a HTTP instance

    if options.http_pin:
        [pw_fd, pw_name] = tempfile.mkstemp()
        os.write(pw_fd, options.http_pin)
        os.close(pw_fd)

    memcache = memcacheinstance.MemcacheInstance()
    memcache.create_instance('MEMCACHE', host_name, dm_password, ipautil.realm_to_suffix(realm_name))

    http = httpinstance.HTTPInstance(fstore)
    if options.http_pkcs12:
        pkcs12_info = (options.http_pkcs12, pw_name)
        http.create_instance(realm_name, host_name, domain_name, dm_password, autoconfig=False, pkcs12_info=pkcs12_info, subject_base=options.subject, auto_redirect=options.ui_redirect)
        os.remove(pw_name)
    else:
        http.create_instance(realm_name, host_name, domain_name, dm_password, autoconfig=True, self_signed_ca=options.selfsign, subject_base=options.subject, auto_redirect=options.ui_redirect)
    ipaservices.restore_context("/var/cache/ipa/sessions")

    set_subject_in_config(realm_name, dm_password, ipautil.realm_to_suffix(realm_name), options.subject)

    # Apply any LDAP updates. Needs to be done after the configuration file
    # is created
    service.print_msg("Applying LDAP updates")
    ds.apply_updates()

    # Restart ds and krb after configurations have been changed
    service.print_msg("Restarting the directory server")
    ds.restart()

    service.print_msg("Restarting the KDC")
    krb.restart()

    # 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,
               zone_refresh=options.zone_refresh,
               persistent_search=options.persistent_search,
               serial_autoincrement=options.serial_autoincrement)
    if options.setup_dns:
        api.Backend.ldap2.connect(bind_dn=DN(('cn', 'Directory Manager')), bind_pw=dm_password)

        bind.create_instance()
        print ""
        bind.check_global_configuration()
        print ""
    else:
        bind.create_sample_bind_zone()

    # Restart httpd to pick up the new IPA configuration
    service.print_msg("Restarting the web server")
    http.restart()

    # Set the admin user kerberos password
    ds.change_admin_password(admin_password)

    # Call client install script
    try:
        args = ["/usr/sbin/ipa-client-install", "--on-master", "--unattended", "--domain", domain_name, "--server", host_name, "--realm", realm_name, "--hostname", host_name]
        if not options.create_sshfp:
            args.append("--no-dns-sshfp")
        if options.trust_sshfp:
            args.append("--ssh-trust-dns")
        if not options.conf_ssh:
            args.append("--no-ssh")
        if not options.conf_sshd:
            args.append("--no-sshd")
        run(args)
    except Exception, e:
        sys.exit("Configuration of client side components failed!\nipa-client-install returned: " + str(e))


    #Everything installed properly, activate ipa service.
    ipaservices.knownservices.ipa.enable()

    print "=============================================================================="
    print "Setup complete"
    print ""
    print "Next steps:"
    print "\t1. You must make sure these network ports are open:"
    print "\t\tTCP Ports:"
    print "\t\t  * 80, 443: HTTP/HTTPS"
    print "\t\t  * 389, 636: LDAP/LDAPS"
    print "\t\t  * 88, 464: kerberos"
    if options.setup_dns:
        print "\t\t  * 53: bind"
    print "\t\tUDP Ports:"
    print "\t\t  * 88, 464: kerberos"
    if options.setup_dns:
        print "\t\t  * 53: bind"
    if options.conf_ntp:
        print "\t\t  * 123: ntp"
    print ""
    print "\t2. You can now obtain a kerberos ticket using the command: 'kinit admin'"
    print "\t   This ticket will allow you to use the IPA tools (e.g., ipa user-add)"
    print "\t   and the web user interface."

    if not ipaservices.knownservices.ntpd.is_running():
        print "\t3. Kerberos requires time synchronization between clients"
        print "\t   and servers for correct operation. You should consider enabling ntpd."

    print ""
    if options.http_pkcs12:
        print "In order for Firefox autoconfiguration to work you will need to"
        print "use a SSL signing certificate. See the IPA documentation for more details."
        print "You also need to install a PEM copy of the CA certificate into"
        print "/usr/share/ipa/html/ca.crt"
    else:
        if options.selfsign:
            print "Be sure to back up the CA certificate stored in /etc/httpd/alias/cacert.p12"
            print "The password for this file is in /etc/httpd/alias/pwdfile.txt"
        else:
            print "Be sure to back up the CA certificate stored in /root/cacert.p12"
            print "This file is required to create replicas. The password for this"
            print "file is the Directory Manager password"

    if ipautil.file_exists(ANSWER_CACHE):
        os.remove(ANSWER_CACHE)
    return 0

if __name__ == '__main__':
    success = False
    try:
        # FIXME: Common option parsing, logging setup, etc should be factored
        # out from all install scripts
        safe_options, options = parse_options()
        if options.uninstall:
            log_file_name = "/var/log/ipaserver-uninstall.log"
        else:
            log_file_name = "/var/log/ipaserver-install.log"

        installutils.run_script(main, log_file_name=log_file_name,
            operation_name='ipa-server-install')
        success = True

    finally:
        if pw_name and ipautil.file_exists(pw_name):
            os.remove(pw_name)

        if not success and installation_cleanup:
            # Do a cautious clean up as we don't know what failed and what is
            # the state of the environment
            try:
                fstore.restore_file('/etc/hosts')
            except:
                pass