path: root/ipa-client/ipa-install/ipa-client-install

#! /usr/bin/python -E
# Authors: Simo Sorce <ssorce@redhat.com>
#          Karl MacMillan <kmacmillan@mentalrootkit.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; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#

VERSION = "%prog .1"

def parse_options():
    parser = OptionParser(version=VERSION)
    parser.add_option("--domain", dest="domain", help="domain name")
    parser.add_option("--server", dest="server", help="IPA server")
    parser.add_option("--realm", dest="realm_name", help="realm name")
    parser.add_option("-f", "--force", dest="force", action="store_true",
                      default=False, help="force setting of ldap/kerberos conf")
    parser.add_option("-d", "--debug", dest="debug", action="store_true",
                      default=False, help="print debugging information")
    parser.add_option("-U", "--unattended", dest="unattended",
                      action="store_true",
                      help="unattended installation never prompts the user")
    parser.add_option("-N", "--no-ntp", action="store_false",
                      help="do not configure ntp", default=True, dest="conf_ntp")
    parser.add_option("--on-master", dest="on_master", action="store_true",
                      help="use this option when run on a master", default=False)

    options, args = parser.parse_args()

    return options

def ask_for_confirmation(message):
    yesno = raw_input(message + " [y/N]: ")
    if not yesno or yesno.lower()[0] != "y":
        return False
    print "\n"
    return True

def logging_setup(options):
    # Always log everything (i.e., DEBUG) to the log
    # file.
    logging.basicConfig(level=logging.DEBUG,
                        format='%(asctime)s %(levelname)s %(message)s',
                        filename='/var/log/ipaclient-install.log',
                        filemode='w')

    console = logging.StreamHandler()
    # If the debug option is set, also log debug messages to the console
    if options.debug:
        console.setLevel(logging.DEBUG)
    else:
        # Otherwise, log critical and error messages
        console.setLevel(logging.ERROR)
    formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
    console.setFormatter(formatter)
    logging.getLogger('').addHandler(console)

def main():
    options = parse_options()
    logging_setup(options)
    dnsok = True

    # Create the discovery instance
    ds = ipaclient.ipadiscovery.IPADiscovery()

    ret = ds.search(domain=options.domain, server=options.server)
    srv = ""
    if ret == -10:
        print "Can't get the fully qualified name of this host"
        print "Please check that the client is properly configured"
        return ret
    if ret == -1:
        logging.debug("Domain not found")
        if options.domain:
            dom = options.domain
        elif options.unattended:
            return ret
        else:
            print "Failed to determine your DNS domain (DNS misconfigured?)"
            dom = ""
            while dom == "":
                dom = raw_input("Please provide your domain name (ex: example.com): ")
        ret = ds.search(domain=dom)
    if ret == -2:
        dnsok = False
        logging.debug("IPA Server not found")
        if options.server:
            srv = options.server
        elif options.unattended:
            return ret
        else:
            print "Failed to find the IPA Server (DNS misconfigured?)"
            while srv == "":
                srv = raw_input("Please provide your server name (ex: ipa.example.com): ")
        ret = ds.search(domain=dom, server=srv)
    if ret != 0:
        print "Failed to verify that "+srv+" is an IPA Server, aborting!"
        return ret

    if dnsok:
        print "Discovery was successful!"
    elif not options.unattended:
        print "\nThe failure to use DNS to find your IPA server indicates that your"
        print "resolv.conf file is not properly configured.\n"
        print "Autodiscovery of servers for failover cannot work with this configuration.\n"
        print "If you proceed with the installation, services will be configured to always"
        print "access the discovered server for all operation and will not fail over to"
        print "other servers in case of failure.\n"
        if not ask_for_confirmation("Do you want to proceed and configure the system with fixed values with no DNS discovery?"):
            return ret

    if options.realm_name and options.realm_name != ds.getRealmName():
        if not options.unattended:
            print "ERROR: The provided realm name: ["+options.realm_name+"] does not match with the discovered one: ["+ds.getRealmName()+"]\n"
        return -3

    print "Realm: "+ds.getRealmName()
    print "DNS Domain: "+ds.getDomainName()
    print "IPA Server: "+ds.getServerName()
    print "BaseDN: "+ds.getBaseDN()

    print "\n"
    if not options.unattended and not ask_for_confirmation("Continue to configure the system with these values?"):
        return 1

    # Configure ipa.conf
    ipaconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
    ipaconf.setOptionAssignment(" = ")
    ipaconf.setSectionNameDelimiters(("[","]"))

    opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
            {'name':'empty', 'type':'empty'}]

    #[defaults]
    defopts = [{'name':'server', 'type':'option', 'value':ds.getServerName()},
             {'name':'realm', 'type':'option', 'value':ds.getRealmName()}]

    opts.append({'name':'defaults', 'type':'section', 'value':defopts})
    opts.append({'name':'empty', 'type':'empty'})

    ipaconf.newConf("/etc/ipa/ipa.conf", opts)
    print "Created /etc/ipa/ipa.conf"

    # Configure ldap.conf
    ldapconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
    ldapconf.setOptionAssignment(" ")

    opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
            {'name':'empty', 'type':'empty'},
            {'name':'nss_base_passwd', 'type':'option', 'value':ds.getBaseDN()+'?sub'},
            {'name':'nss_base_group', 'type':'option', 'value':ds.getBaseDN()+'?sub'},
            {'name':'nss_map_attribute', 'type':'option', 'value':'uniqueMember member'},
            {'name':'base', 'type':'option', 'value':ds.getBaseDN()},
            {'name':'ldap_version', 'type':'option', 'value':'3'}]
    if not dnsok or options.force or options.on_master:
        opts.append({'name':'uri', 'type':'option', 'value':'ldap://'+ds.getServerName()})

    opts.append({'name':'empty', 'type':'empty'})
    try:
        ldapconf.newConf("/etc/ldap.conf", opts)
        print "Configured /etc/ldap.conf"
    except Exception, e:
        print "Creation of /etc/ldap.conf: " + str(e)
        return 1

    #Check if kerberos is already configured properly
    krbctx = krbV.default_context()
    # If we find our domain assume we are properly configured
    #(ex. we are configuring the client side of a Master)
    if not options.on_master and (not krbctx.default_realm == ds.getRealmName() or options.force):

        #Configure krb5.conf
        krbconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
        krbconf.setOptionAssignment(" = ")
        krbconf.setSectionNameDelimiters(("[","]"))
        krbconf.setSubSectionDelimiters(("{","}"))
        krbconf.setIndent(("","  ","    "))

        opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
                {'name':'empty', 'type':'empty'}]

        #[libdefaults]
        libopts = [{'name':'default_realm', 'type':'option', 'value':ds.getRealmName()}]
        if dnsok and not options.force:
            libopts.append({'name':'dns_lookup_realm', 'type':'option', 'value':'true'})
            libopts.append({'name':'dns_lookup_kdc', 'type':'option', 'value':'true'})
        else:
            libopts.append({'name':'dns_lookup_realm', 'type':'option', 'value':'false'})
            libopts.append({'name':'dns_lookup_kdc', 'type':'option', 'value':'false'})
        libopts.append({'name':'ticket_lifetime', 'type':'option', 'value':'24h'})
        libopts.append({'name':'forwardable', 'type':'option', 'value':'yes'})

        opts.append({'name':'libdefaults', 'type':'section', 'value':libopts})
        opts.append({'name':'empty', 'type':'empty'})

	#the following are necessary only if DNS discovery does not work
        if not dnsok or options.force:
            #[realms]
            kropts =[{'name':'kdc', 'type':'option', 'value':ds.getServerName()+':88'},
                     {'name':'admin_server', 'type':'option', 'value':ds.getServerName()+':749'},
                     {'name':'default_domain', 'type':'option', 'value':ds.getDomainName()}]
            ropts = [{'name':ds.getRealmName(), 'type':'subsection', 'value':kropts}]
            opts.append({'name':'realms', 'type':'section', 'value':ropts})
            opts.append({'name':'empty', 'type':'empty'})

            #[domain_realm]
            dropts = [{'name':'.'+ds.getDomainName(), 'type':'option', 'value':ds.getRealmName()},
                      {'name':ds.getDomainName(), 'type':'option', 'value':ds.getRealmName()}]
            opts.append({'name':'domain_realm', 'type':'section', 'value':dropts})
            opts.append({'name':'empty', 'type':'empty'})

        #[appdefaults]
        pamopts = [{'name':'debug', 'type':'option', 'value':'false'},
                   {'name':'ticket_lifetime', 'type':'option', 'value':'36000'},
                   {'name':'renew_lifetime', 'type':'option', 'value':'36000'},
                   {'name':'forwardable', 'type':'option', 'value':'true'},
                   {'name':'krb4_convert', 'type':'option', 'value':'false'}]
        appopts = [{'name':'pam', 'type':'subsection', 'value':pamopts}]
        opts.append({'name':'appdefaults', 'type':'section', 'value':appopts})

        krbconf.newConf("/etc/krb5.conf", opts);
        print "Configured /etc/krb5.conf for IPA realm " + ds.getRealmName()

    #Modify nsswitch to add nss_ldap
    run(["/usr/sbin/authconfig", "--enableldap", "--update"])
    print "LDAP enabled"

    #Check nss_ldap is working properly
    if not options.on_master:
        try:
            run(["getent", "passwd", "admin"])
        except Exception, e:
            print "nss_ldap is not able to use DNS discovery!"
            print "Changing configuration to use hardcoded server name: " + ds.getServerName()

            opts = [{'name':'uri', 'type':'option', 'action':'set', 'value':'ldap://'+ds.getServerName()},
                    {'name':'empty', 'type':'empty'}]
            try:
                ldapconf.changeConf("/etc/ldap.conf", opts)
            except Exception, e:
                print "Adding hardcoded server name to /etc/ldap.conf failed: " + str(e)
                return 1

    #Modify pam to add pam_krb5
    run(["/usr/sbin/authconfig", "--enablekrb5", "--update"])
    print "Kerberos 5 enabled"

    if options.conf_ntp and not options.on_master:
        ipaclient.ntpconf.config_ntp(ds.getServerName())
        print "NTP enabled"

    print "Client configuration complete."

    return 0

try:
    import sys

    import krbV
    import socket
    import logging
    from optparse import OptionParser
    import ipaclient.ipadiscovery
    import ipaclient.ipachangeconf
    import ipaclient.ntpconf
    from ipa.ipautil import run

    sys.exit(main())
except KeyboardInterrupt:
    sys.exit(1)