mirror of
https://salsa.debian.org/freeipa-team/freeipa.git
synced 2024-12-23 07:33:27 -06:00
b27ad6e9f9
ipa-client-automount used to only restore nsswitch.conf when sssd was not
used. However authselect's default profile is now sssd so always restore
nsswitch.conf's automount configuration to 'files sssd'.
Note that the behavior seen before commit:
a0e846f56c
would always restore nsswitch.conf to the previous state which in some cases
was wrong.
Fixes: https://pagure.io/freeipa/issue/8038
Signed-off-by: François Cami <fcami@redhat.com>
Reviewed-By: Francois Cami <fcami@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
660 lines
21 KiB
Python
660 lines
21 KiB
Python
#
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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, 2019 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 logging
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import sys
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import os
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import shutil
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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 ipaclient.install.client import (
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CLIENT_NOT_CONFIGURED,
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CLIENT_ALREADY_CONFIGURED,
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)
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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 ipalib.util import check_client_configuration
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from ipapython import ipautil
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from ipapython.ipa_log_manager import 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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from ipapython.admintool import ScriptError
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logger = logging.getLogger(os.path.basename(__file__))
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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(
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"--location",
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dest="location",
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default="default",
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help="Automount location",
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)
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parser.add_option(
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"-S",
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"--no-sssd",
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dest="sssd",
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action="store_false",
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default=True,
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help="Do not configure the client to use SSSD for automount",
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)
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parser.add_option(
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"--idmap-domain",
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dest="idmapdomain",
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default=None,
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help="nfs domain for idmap.conf",
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)
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parser.add_option(
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"--debug",
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dest="debug",
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action="store_true",
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default=False,
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help="enable debugging",
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)
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parser.add_option(
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"-U",
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"--unattended",
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dest="unattended",
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action="store_true",
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default=False,
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help="unattended installation never prompts the user",
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)
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parser.add_option(
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"--uninstall",
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dest="uninstall",
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action="store_true",
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default=False,
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help="Unconfigure automount",
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)
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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([paths.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 = (
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"Unable to find 'admin' user with "
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"'getent passwd admin@%s'!" % api.env.realm
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)
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logger.debug('%s', err_msg)
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print(err_msg)
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print(
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"This may mean that sssd didn't re-start properly after "
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"the configuration changes."
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)
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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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logger.debug('Unable to open file %s', e)
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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(statestore, options):
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"""
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Point automount to ldap in nsswitch.conf.
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This function is for non-SSSD setups only.
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"""
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conf = ipachangeconf.IPAChangeConf("IPA Installer")
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conf.setOptionAssignment(':')
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with open(paths.NSSWITCH_CONF, 'r') as f:
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current_opts = conf.parse(f)
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current_nss_value = conf.findOpts(
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current_opts, name='automount', type='option'
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)[1]
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if current_nss_value is None:
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# no automount database present
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current_nss_value = False # None cannot be backed up
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else:
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current_nss_value = current_nss_value['value']
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statestore.backup_state(
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'ipa-client-automount-nsswitch', 'previous-automount',
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current_nss_value
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)
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nss_value = ' files ldap'
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opts = [
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{
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'name': 'automount',
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'type': 'option',
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'action': 'set',
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'value': nss_value,
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},
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{'name': 'empty', 'type': 'empty'},
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]
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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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logger.error("Unable to activate the Autofs service in SSSD config.")
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logger.info(
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"Please make sure you have SSSD built with autofs support "
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"installed."
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)
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logger.info(
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"Configure autofs support manually in /etc/sssd/sssd.conf."
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)
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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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print('An automount location is already configured')
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sys.exit(CLIENT_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(
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DN(
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('cn', options.location),
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api.env.container_automount,
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api.env.basedn,
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)
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)
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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(
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fstore, paths.SYSCONFIG_AUTOFS, replacevars=replacevars
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)
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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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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(
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"Failed to configure automatic startup of the %s daemon"
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% (autofs.service_name)
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)
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logger.error(
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"Failed to enable automatic startup of the %s daemon: %s",
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autofs.service_name,
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str(e),
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)
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def uninstall(fstore, statestore):
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RESTORE_FILES = [
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paths.SYSCONFIG_AUTOFS,
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paths.AUTOFS_LDAP_AUTH_CONF,
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paths.SYSCONFIG_NFS,
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paths.IDMAPD_CONF,
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]
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STATES = ['autofs', 'rpcidmapd', 'rpcgssd']
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if statestore.get_state(
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'ipa-client-automount-nsswitch', 'previous-automount'
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) is False:
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# Previous nsswitch.conf had no automount database configured
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# so remove it.
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conf = ipachangeconf.IPAChangeConf("IPA automount installer")
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conf.setOptionAssignment(':')
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changes = [conf.rmOption('automount')]
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conf.changeConf(paths.NSSWITCH_CONF, changes)
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tasks.restore_context(paths.NSSWITCH_CONF)
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statestore.delete_state(
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'ipa-client-automount-nsswitch', 'previous-automount'
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)
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elif statestore.get_state(
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'ipa-client-automount-nsswitch', 'previous-automount'
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) is not None:
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nss_value = statestore.get_state(
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'ipa-client-automount-nsswitch', 'previous-automount'
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)
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opts = [
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{
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'name': 'automount',
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'type': 'option',
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'action': 'set',
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'value': nss_value,
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},
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{'name': 'empty', 'type': 'empty'},
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]
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conf = ipachangeconf.IPAChangeConf("IPA automount installer")
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conf.setOptionAssignment(':')
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conf.changeConf(paths.NSSWITCH_CONF, opts)
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tasks.restore_context(paths.NSSWITCH_CONF)
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statestore.delete_state(
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'ipa-client-automount-nsswitch', 'previous-automount'
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)
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if not any(fstore.has_file(f) for f in RESTORE_FILES) or not any(
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statestore.has_state(s) for s in STATES
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):
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print("IPA automount is not configured on this system")
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return CLIENT_NOT_CONFIGURED
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print("Restoring configuration")
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for filepath in RESTORE_FILES:
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if fstore.has_file(filepath):
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fstore.restore_file(filepath)
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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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logger.debug(
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'Unable to restore SSSD configuration: %s', str(e)
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)
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# rpcidmapd and rpcgssd are static units now
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if statestore.has_state('rpcidmapd'):
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statestore.delete_state('rpcidmapd', 'enabled')
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statestore.delete_state('rpcidmapd', 'running')
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if statestore.has_state('rpcgssd'):
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statestore.delete_state('rpcgssd', 'enabled')
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statestore.delete_state('rpcgssd', 'running')
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nfsutils = services.knownservices['nfs-utils']
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try:
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nfsutils.restart()
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except Exception as e:
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logger.error("Failed to restart nfs client services (%s)", str(e))
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return 1
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return 0
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def configure_nfs(fstore, statestore, options):
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"""
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Configure secure NFS
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"""
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# Newer Fedora releases ship /etc/nfs.conf instead of /etc/sysconfig/nfs
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# and do not require changes there. On these, SECURE_NFS_VAR == None
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if constants.SECURE_NFS_VAR:
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replacevars = {constants.SECURE_NFS_VAR: 'yes'}
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ipautil.backup_config_and_replace_variables(
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fstore, paths.SYSCONFIG_NFS, replacevars=replacevars
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)
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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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if options.idmapdomain is None:
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# Set NFSv4 domain to the IPA domain
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changes = [conf.setOption('Domain', api.env.domain)]
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elif options.idmapdomain == 'DNS':
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# Rely on idmapd auto-detection (DNS)
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changes = [conf.rmOption('Domain')]
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else:
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# Set NFSv4 domain to what was provided
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changes = [conf.setOption('Domain', options.idmapdomain)]
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if changes is not None:
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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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rpcgssd = services.knownservices.rpcgssd
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try:
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rpcgssd.restart()
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except Exception as e:
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logger.error("Failed to restart rpc-gssd (%s)", str(e))
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nfsutils = services.knownservices['nfs-utils']
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try:
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nfsutils.restart()
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except Exception as e:
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logger.error("Failed to restart nfs client services (%s)", str(e))
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def configure_automount():
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try:
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check_client_configuration()
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except ScriptError as e:
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print(e.msg)
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sys.exit(e.rval)
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fstore = sysrestore.FileStore(paths.IPA_CLIENT_SYSRESTORE)
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|
statestore = sysrestore.StateFile(paths.IPA_CLIENT_SYSRESTORE)
|
|
|
|
options, _args = parse_options()
|
|
|
|
standard_logging_setup(
|
|
paths.IPACLIENT_INSTALL_LOG,
|
|
verbose=False,
|
|
debug=options.debug,
|
|
filemode='a',
|
|
console_format='%(message)s',
|
|
)
|
|
|
|
cfg = dict(
|
|
context='cli_installer',
|
|
confdir=paths.ETC_IPA,
|
|
in_server=False,
|
|
debug=options.debug,
|
|
verbose=0,
|
|
)
|
|
|
|
# Bootstrap API early so that env object is available
|
|
api.bootstrap(**cfg)
|
|
|
|
if options.uninstall:
|
|
return uninstall(fstore, statestore)
|
|
|
|
ca_cert_path = None
|
|
if os.path.exists(paths.IPA_CA_CRT):
|
|
ca_cert_path = paths.IPA_CA_CRT
|
|
|
|
if statestore.has_state('autofs'):
|
|
print('An automount location is already configured')
|
|
sys.exit(CLIENT_ALREADY_CONFIGURED)
|
|
|
|
autodiscover = False
|
|
ds = ipadiscovery.IPADiscovery()
|
|
if not options.server:
|
|
print("Searching for IPA server...")
|
|
ret = ds.search(ca_cert_path=ca_cert_path)
|
|
logger.debug('Executing DNS discovery')
|
|
if ret == ipadiscovery.NO_LDAP_SERVER:
|
|
logger.debug('Autodiscovery did not find LDAP server')
|
|
s = urlsplit(api.env.xmlrpc_uri)
|
|
server = [s.netloc]
|
|
logger.debug('Setting server to %s', s.netloc)
|
|
else:
|
|
autodiscover = True
|
|
if not ds.servers:
|
|
sys.exit(
|
|
'Autodiscovery was successful but didn\'t return a server'
|
|
)
|
|
logger.debug(
|
|
'Autodiscovery success, possible servers %s',
|
|
','.join(ds.servers),
|
|
)
|
|
server = ds.servers[0]
|
|
else:
|
|
server = options.server
|
|
logger.debug("Verifying that %s is an IPA server", server)
|
|
ldapret = ds.ipacheckldap(server, api.env.realm, ca_cert_path)
|
|
if ldapret[0] == ipadiscovery.NO_ACCESS_TO_LDAP:
|
|
print("Anonymous access to the LDAP server is disabled.")
|
|
print("Proceeding without strict verification.")
|
|
print(
|
|
"Note: This is not an error if anonymous access has been "
|
|
"explicitly restricted."
|
|
)
|
|
elif ldapret[0] == ipadiscovery.NO_TLS_LDAP:
|
|
logger.warning("Unencrypted access to LDAP is not supported.")
|
|
elif ldapret[0] != 0:
|
|
sys.exit('Unable to confirm that %s is an IPA server' % server)
|
|
|
|
if not autodiscover:
|
|
print("IPA server: %s" % server)
|
|
logger.debug('Using fixed server %s', server)
|
|
else:
|
|
print("IPA server: DNS discovery")
|
|
logger.debug('Configuring to use DNS discovery')
|
|
|
|
print("Location: %s" % options.location)
|
|
logger.debug('Using automount location %s', options.location)
|
|
|
|
ccache_dir = tempfile.mkdtemp()
|
|
ccache_name = os.path.join(ccache_dir, 'ccache')
|
|
try:
|
|
try:
|
|
host_princ = str('host/%s@%s' % (api.env.host, api.env.realm))
|
|
kinit_keytab(host_princ, paths.KRB5_KEYTAB, ccache_name)
|
|
os.environ['KRB5CCNAME'] = ccache_name
|
|
except gssapi.exceptions.GSSError as e:
|
|
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:
|
|
shutil.rmtree(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(statestore, options)
|
|
configure_nfs(fstore, statestore, options)
|
|
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:
|
|
logger.debug('Raised exception %s', e)
|
|
print("Installation failed. Rolling back changes.")
|
|
uninstall(fstore, statestore)
|
|
return 1
|
|
|
|
return 0
|
|
|
|
|
|
def main():
|
|
try:
|
|
if not os.geteuid() == 0:
|
|
sys.exit("\nMust be run as root\n")
|
|
configure_automount()
|
|
except SystemExit as e:
|
|
sys.exit(e)
|
|
except RuntimeError as e:
|
|
sys.exit(e)
|
|
except (KeyboardInterrupt, EOFError):
|
|
sys.exit(1)
|