mirror of
https://salsa.debian.org/freeipa-team/freeipa.git
synced 2024-12-23 07:33:27 -06:00
b4e447fa6f
Change in 2d4d1a9dc0 no longer initializes
api in `ipa-client-automount --uninstallation` Which caused error in
wait_for_sssd which gets realm from initialized API.
This patch initializes the API in a way that it doesn't download schema
on uninstallation and on installation it uses host keytab for it so it
no longer requires user's Kerberos credentials.
Also fix call of xxx_service_class_factory which requires api as param.
https://pagure.io/freeipa/issue/6861
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Tomas Krizek <tkrizek@redhat.com>
510 lines
18 KiB
Python
Executable File
510 lines
18 KiB
Python
Executable File
#!/usr/bin/python2 -E
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#
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# Authors:
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# Rob Crittenden <rcritten@redhat.com>
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#
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# Copyright (C) 2012 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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# Configure the automount client for ldap.
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from __future__ import print_function
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import sys
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import os
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import time
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import tempfile
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import gssapi
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try:
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from xml.etree import cElementTree as etree
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except ImportError:
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from xml.etree import ElementTree as etree
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import SSSDConfig
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# pylint: disable=import-error
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from six.moves.urllib.parse import urlsplit
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# pylint: enable=import-error
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from optparse import OptionParser # pylint: disable=deprecated-module
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from ipaclient.install import ipachangeconf, ipadiscovery
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from ipalib import api, errors
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from ipalib.install import sysrestore
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from ipalib.install.kinit import kinit_keytab
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from ipapython import ipautil
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from ipapython.ipa_log_manager import root_logger, standard_logging_setup
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from ipapython.dn import DN
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from ipaplatform.constants import constants
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from ipaplatform.tasks import tasks
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from ipaplatform import services
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from ipaplatform.paths import paths
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def parse_options():
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usage = "%prog [options]\n"
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parser = OptionParser(usage=usage)
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parser.add_option("--server", dest="server", help="FQDN of IPA server")
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parser.add_option("--location", dest="location", help="Automount location",
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default="default")
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parser.add_option("-S", "--no-sssd", dest="sssd",
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action="store_false", default=True,
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help="Do not configure the client to use SSSD for automount")
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parser.add_option("--debug", dest="debug", action="store_true",
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default=False, help="enable debugging")
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parser.add_option("-U", "--unattended", dest="unattended",
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action="store_true", default=False,
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help="unattended installation never prompts the user")
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parser.add_option("--uninstall", dest="uninstall", action="store_true",
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default=False, help="Unconfigure automount")
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options, args = parser.parse_args()
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return options, args
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def wait_for_sssd():
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"""
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It takes a bit for sssd to get going, lets loop until it is
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serving data.
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This function returns nothing.
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"""
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n = 0
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found = False
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time.sleep(1)
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while n < 10 and not found:
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try:
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ipautil.run(["getent", "passwd", "admin@%s" % api.env.realm])
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found = True
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except Exception:
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time.sleep(1)
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n = n + 1
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# This should never happen but if it does, may as well warn the user
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if not found:
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err_msg = ("Unable to find 'admin' user with "
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"'getent passwd admin@%s'!" % api.env.realm)
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root_logger.debug(err_msg)
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print(err_msg)
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print("This may mean that sssd didn't re-start properly after the configuration changes.")
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def configure_xml(fstore):
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authconf = paths.AUTOFS_LDAP_AUTH_CONF
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fstore.backup_file(authconf)
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try:
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tree = etree.parse(authconf)
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except IOError as e:
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root_logger.debug('Unable to open file %s' % e)
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root_logger.debug('Creating new from template')
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tree = etree.ElementTree(
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element=etree.Element('autofs_ldap_sasl_conf')
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)
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element = tree.getroot()
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if element.tag != 'autofs_ldap_sasl_conf':
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raise RuntimeError('Invalid XML root in file %s' % authconf)
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element.set('usetls', 'no')
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element.set('tlsrequired', 'no')
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element.set('authrequired', 'yes')
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element.set('authtype', 'GSSAPI')
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element.set('clientprinc', 'host/%s@%s' % (api.env.host, api.env.realm))
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try:
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tree.write(authconf, xml_declaration=True, encoding='UTF-8')
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except IOError as e:
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print("Unable to write %s: %s" % (authconf, e))
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else:
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print("Configured %s" % authconf)
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def configure_nsswitch(fstore, options):
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"""
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Point automount to ldap in nsswitch.conf. This function is for non-SSSD
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setups only
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"""
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fstore.backup_file(paths.NSSWITCH_CONF)
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conf = ipachangeconf.IPAChangeConf("IPA Installer")
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conf.setOptionAssignment(':')
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nss_value = ' files ldap'
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opts = [{'name':'automount', 'type':'option', 'action':'set', 'value':nss_value},
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{'name':'empty', 'type':'empty'}]
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conf.changeConf(paths.NSSWITCH_CONF, opts)
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print("Configured %s" % paths.NSSWITCH_CONF)
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def configure_autofs_sssd(fstore, statestore, autodiscover, options):
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try:
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sssdconfig = SSSDConfig.SSSDConfig()
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sssdconfig.import_config()
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domains = sssdconfig.list_active_domains()
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except Exception as e:
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sys.exit(e)
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try:
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sssdconfig.new_service('autofs')
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except SSSDConfig.ServiceAlreadyExists:
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pass
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except SSSDConfig.ServiceNotRecognizedError:
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root_logger.error("Unable to activate the Autofs service in SSSD config.")
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root_logger.info(
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"Please make sure you have SSSD built with autofs support installed.")
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root_logger.info(
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"Configure autofs support manually in /etc/sssd/sssd.conf.")
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sys.exit("Cannot create the autofs service in sssd.conf")
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sssdconfig.activate_service('autofs')
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domain = None
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for name in domains:
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domain = sssdconfig.get_domain(name)
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try:
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provider = domain.get_option('id_provider')
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except SSSDConfig.NoOptionError:
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continue
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if provider == "ipa":
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domain.add_provider('ipa', 'autofs')
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try:
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domain.get_option('ipa_automount_location')
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sys.exit('An automount location is already configured')
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except SSSDConfig.NoOptionError:
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domain.set_option('ipa_automount_location', options.location)
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break
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if domain is None:
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sys.exit('SSSD is not configured.')
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sssdconfig.save_domain(domain)
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sssdconfig.write(paths.SSSD_CONF)
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statestore.backup_state('autofs', 'sssd', True)
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sssd = services.service('sssd', api)
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sssd.restart()
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print("Restarting sssd, waiting for it to become available.")
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wait_for_sssd()
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def configure_autofs(fstore, statestore, autodiscover, server, options):
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"""
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fstore: the FileStore to back up files in
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options.server: the IPA server to use
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options.location: the Automount location to use
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"""
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if not autodiscover:
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ldap_uri = "ldap://%s" % server
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else:
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ldap_uri = "ldap:///%s" % api.env.basedn
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search_base = str(DN(('cn', options.location), api.env.container_automount, api.env.basedn))
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replacevars = {
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'MAP_OBJECT_CLASS': 'automountMap',
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'ENTRY_OBJECT_CLASS': 'automount',
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'MAP_ATTRIBUTE': 'automountMapName',
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'ENTRY_ATTRIBUTE': 'automountKey',
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'VALUE_ATTRIBUTE': 'automountInformation',
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'SEARCH_BASE': search_base,
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'LDAP_URI': ldap_uri,
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}
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ipautil.backup_config_and_replace_variables(fstore,
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paths.SYSCONFIG_AUTOFS, replacevars=replacevars)
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tasks.restore_context(paths.SYSCONFIG_AUTOFS)
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statestore.backup_state('autofs', 'sssd', False)
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print("Configured %s" % paths.SYSCONFIG_AUTOFS)
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def configure_autofs_common(fstore, statestore, options):
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autofs = services.knownservices.autofs
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statestore.backup_state('autofs', 'enabled', autofs.is_enabled())
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statestore.backup_state('autofs', 'running', autofs.is_running())
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try:
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autofs.restart()
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print("Started %s" % autofs.service_name)
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except Exception as e:
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root_logger.error("%s failed to restart: %s", autofs.service_name, e)
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try:
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autofs.enable()
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except Exception as e:
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print("Failed to configure automatic startup of the %s daemon" % (autofs.service_name))
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root_logger.error("Failed to enable automatic startup of the %s daemon: %s" % (autofs.service_name, str(e)))
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def uninstall(fstore, statestore):
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print("Restoring configuration")
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if fstore.has_file(paths.SYSCONFIG_AUTOFS):
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fstore.restore_file(paths.SYSCONFIG_AUTOFS)
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if fstore.has_file(paths.NSSWITCH_CONF):
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fstore.restore_file(paths.NSSWITCH_CONF)
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if fstore.has_file(paths.AUTOFS_LDAP_AUTH_CONF):
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fstore.restore_file(paths.AUTOFS_LDAP_AUTH_CONF)
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if fstore.has_file(paths.SYSCONFIG_NFS):
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fstore.restore_file(paths.SYSCONFIG_NFS)
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if fstore.has_file(paths.IDMAPD_CONF):
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fstore.restore_file(paths.IDMAPD_CONF)
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if statestore.has_state('autofs'):
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enabled = statestore.restore_state('autofs', 'enabled')
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running = statestore.restore_state('autofs', 'running')
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sssd = statestore.restore_state('autofs', 'sssd')
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autofs = services.knownservices.autofs
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if not enabled:
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autofs.disable()
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if not running:
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autofs.stop()
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if sssd:
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try:
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sssdconfig = SSSDConfig.SSSDConfig()
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sssdconfig.import_config()
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sssdconfig.deactivate_service('autofs')
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domains = sssdconfig.list_active_domains()
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for name in domains:
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domain = sssdconfig.get_domain(name)
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try:
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provider = domain.get_option('id_provider')
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except SSSDConfig.NoOptionError:
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continue
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if provider == "ipa":
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domain.remove_option('ipa_automount_location')
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domain.remove_provider('autofs')
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break
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sssdconfig.save_domain(domain)
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sssdconfig.write(paths.SSSD_CONF)
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sssd = services.service('sssd', api)
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sssd.restart()
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wait_for_sssd()
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except Exception as e:
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print('Unable to restore SSSD configuration: %s' % str(e))
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root_logger.debug('Unable to restore SSSD configuration: %s' % str(e))
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if statestore.has_state('rpcidmapd'):
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enabled = statestore.restore_state('rpcidmapd', 'enabled')
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running = statestore.restore_state('rpcidmapd', 'running')
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rpcidmapd = services.knownservices.rpcidmapd
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if not enabled:
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rpcidmapd.disable()
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if not running:
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rpcidmapd.stop()
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if statestore.has_state('rpcgssd'):
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enabled = statestore.restore_state('rpcgssd', 'enabled')
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running = statestore.restore_state('rpcgssd', 'running')
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rpcgssd = services.knownservices.rpcgssd
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if not enabled:
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rpcgssd.disable()
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if not running:
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rpcgssd.stop()
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return 0
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def configure_nfs(fstore, statestore):
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"""
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Configure secure NFS
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"""
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replacevars = {
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constants.SECURE_NFS_VAR: 'yes',
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}
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ipautil.backup_config_and_replace_variables(fstore,
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paths.SYSCONFIG_NFS, replacevars=replacevars)
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tasks.restore_context(paths.SYSCONFIG_NFS)
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print("Configured %s" % paths.SYSCONFIG_NFS)
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# Prepare the changes
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# We need to use IPAChangeConf as simple regexp substitution
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# does not cut it here
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conf = ipachangeconf.IPAChangeConf("IPA automount installer")
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conf.case_insensitive_sections = False
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conf.setOptionAssignment(" = ")
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conf.setSectionNameDelimiters(("[", "]"))
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changes = [conf.setOption('Domain', api.env.domain)]
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section_with_changes = [conf.setSection('General', changes)]
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# Backup the file and apply the changes
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fstore.backup_file(paths.IDMAPD_CONF)
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conf.changeConf(paths.IDMAPD_CONF, section_with_changes)
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tasks.restore_context(paths.IDMAPD_CONF)
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print("Configured %s" % paths.IDMAPD_CONF)
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rpcidmapd = services.knownservices.rpcidmapd
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statestore.backup_state('rpcidmapd', 'enabled', rpcidmapd.is_enabled())
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statestore.backup_state('rpcidmapd', 'running', rpcidmapd.is_running())
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try:
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rpcidmapd.restart()
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print("Started %s" % rpcidmapd.service_name)
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except Exception as e:
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root_logger.error("%s failed to restart: %s", rpcidmapd.service_name, e)
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try:
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rpcidmapd.enable()
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except Exception as e:
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print("Failed to configure automatic startup of the %s daemon" % (rpcidmapd.service_name))
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root_logger.error("Failed to enable automatic startup of the %s daemon: %s" % (rpcidmapd.service_name, str(e)))
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rpcgssd = services.knownservices.rpcgssd
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statestore.backup_state('rpcgssd', 'enabled', rpcgssd.is_enabled())
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statestore.backup_state('rpcgssd', 'running', rpcgssd.is_running())
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try:
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rpcgssd.restart()
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print("Started %s" % rpcgssd.service_name)
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except Exception as e:
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root_logger.error("%s failed to restart: %s", rpcgssd.service_name, e)
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try:
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rpcgssd.enable()
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except Exception as e:
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print("Failed to configure automatic startup of the %s daemon" % (rpcgssd.service_name))
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root_logger.error("Failed to enable automatic startup of the %s daemon: %s" % (rpcgssd.service_name, str(e)))
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def main():
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fstore = sysrestore.FileStore(paths.IPA_CLIENT_SYSRESTORE)
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statestore = sysrestore.StateFile(paths.IPA_CLIENT_SYSRESTORE)
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if not fstore.has_files() and not os.path.exists(paths.IPA_DEFAULT_CONF):
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sys.exit('IPA client is not configured on this system.\n')
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options, _args = parse_options()
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standard_logging_setup(
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paths.IPACLIENT_INSTALL_LOG, verbose=False, debug=options.debug,
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filemode='a', console_format='%(message)s')
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cfg = dict(
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context='cli_installer',
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confdir=paths.ETC_IPA,
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in_server=False,
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debug=options.debug,
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verbose=0,
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)
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# Bootstrap API early so that env object is available
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api.bootstrap(**cfg)
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if options.uninstall:
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return uninstall(fstore, statestore)
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ca_cert_path = None
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if os.path.exists(paths.IPA_CA_CRT):
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ca_cert_path = paths.IPA_CA_CRT
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if statestore.has_state('autofs'):
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sys.exit('automount is already configured on this system.\n')
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autodiscover = False
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ds = ipadiscovery.IPADiscovery()
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if not options.server:
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print("Searching for IPA server...")
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ret = ds.search(ca_cert_path=ca_cert_path)
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root_logger.debug('Executing DNS discovery')
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if ret == ipadiscovery.NO_LDAP_SERVER:
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root_logger.debug('Autodiscovery did not find LDAP server')
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s = urlsplit(api.env.xmlrpc_uri)
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server = [s.netloc]
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root_logger.debug('Setting server to %s' % s.netloc)
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else:
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autodiscover = True
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if not ds.servers:
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sys.exit('Autodiscovery was successful but didn\'t return a server')
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root_logger.debug('Autodiscovery success, possible servers %s' % ','.join(ds.servers))
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server = ds.servers[0]
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else:
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server = options.server
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root_logger.debug("Verifying that %s is an IPA server" % server)
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ldapret = ds.ipacheckldap(server, api.env.realm, ca_cert_path)
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if ldapret[0] == ipadiscovery.NO_ACCESS_TO_LDAP:
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print("Anonymous access to the LDAP server is disabled.")
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print("Proceeding without strict verification.")
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print("Note: This is not an error if anonymous access has been explicitly restricted.")
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elif ldapret[0] == ipadiscovery.NO_TLS_LDAP:
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root_logger.warning("Unencrypted access to LDAP is not supported.")
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elif ldapret[0] != 0:
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sys.exit('Unable to confirm that %s is an IPA server' % server)
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if not autodiscover:
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print("IPA server: %s" % server)
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root_logger.debug('Using fixed server %s' % server)
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else:
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print("IPA server: DNS discovery")
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root_logger.debug('Configuring to use DNS discovery')
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print("Location: %s" % options.location)
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root_logger.debug('Using automount location %s' % options.location)
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ccache_dir = tempfile.mkdtemp()
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ccache_name = os.path.join(ccache_dir, 'ccache')
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try:
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try:
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host_princ = str('host/%s@%s' % (api.env.host, api.env.realm))
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kinit_keytab(host_princ, paths.KRB5_KEYTAB, ccache_name)
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os.environ['KRB5CCNAME'] = ccache_name
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except gssapi.exceptions.GSSError as e:
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sys.exit("Failed to obtain host TGT: %s" % e)
|
|
|
|
# Finalize API when TGT obtained using host keytab exists
|
|
api.finalize()
|
|
|
|
# Now we have a TGT, connect to IPA
|
|
try:
|
|
api.Backend.rpcclient.connect()
|
|
except errors.KerberosError as e:
|
|
sys.exit('Cannot connect to the server due to ' + str(e))
|
|
try:
|
|
# Use the RPC directly so older servers are supported
|
|
api.Backend.rpcclient.forward(
|
|
'automountlocation_show',
|
|
ipautil.fsdecode(options.location),
|
|
version=u'2.0',
|
|
)
|
|
except errors.VersionError as e:
|
|
sys.exit('This client is incompatible: ' + str(e))
|
|
except errors.NotFound:
|
|
sys.exit("Automount location '%s' does not exist" % options.location)
|
|
except errors.PublicError as e:
|
|
sys.exit("Cannot connect to the server due to generic error: %s" % str(e))
|
|
finally:
|
|
os.remove(ccache_name)
|
|
os.rmdir(ccache_dir)
|
|
|
|
if not options.unattended and not ipautil.user_input("Continue to configure the system with these values?", False):
|
|
sys.exit("Installation aborted")
|
|
|
|
try:
|
|
if not options.sssd:
|
|
configure_nsswitch(fstore, options)
|
|
configure_nfs(fstore, statestore)
|
|
if options.sssd:
|
|
configure_autofs_sssd(fstore, statestore, autodiscover, options)
|
|
else:
|
|
configure_xml(fstore)
|
|
configure_autofs(fstore, statestore, autodiscover, server, options)
|
|
configure_autofs_common(fstore, statestore, options)
|
|
except Exception as e:
|
|
root_logger.debug('Raised exception %s' % e)
|
|
print("Installation failed. Rolling back changes.")
|
|
uninstall(fstore, statestore)
|
|
return 1
|
|
|
|
return 0
|
|
|
|
try:
|
|
if not os.geteuid()==0:
|
|
sys.exit("\nMust be run as root\n")
|
|
|
|
sys.exit(main())
|
|
except SystemExit as e:
|
|
sys.exit(e)
|
|
except RuntimeError as e:
|
|
sys.exit(e)
|
|
except (KeyboardInterrupt, EOFError):
|
|
sys.exit(1)
|