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#!/usr/bin/env python
#
# Authors:
# Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2012 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/>.
#
# Configure the automount client for ldap.
import sys
import os
import urlparse
import time
import tempfile
import SSSDConfig
from optparse import OptionParser
from ipalib import api, errors
from ipapython import sysrestore
from ipapython import ipautil
from ipaclient import ipadiscovery
from ipaclient import ipachangeconf
from ipapython.ipa_log_manager import *
from ipapython.dn import DN
from ipapython import services as ipaservices
AUTOFS_CONF = '/etc/sysconfig/autofs'
NSSWITCH_CONF = '/etc/nsswitch.conf'
AUTOFS_LDAP_AUTH = '/etc/autofs_ldap_auth.conf'
NFS_CONF = '/etc/sysconfig/nfs'
IDMAPD_CONF = '/etc/idmapd.conf'
CACERT = '/etc/ipa/ca.crt'
def parse_options():
usage = "%prog [options]\n"
parser = OptionParser(usage=usage)
parser.add_option("--server", dest="server", help="IPA server")
parser.add_option("--location", dest="location", help="Automount location",
default="default")
parser.add_option("-S", "--no-sssd", dest="sssd",
action="store_false", default=True,
help="Do not configure the client to use SSSD for automount")
parser.add_option("--debug", dest="debug", action="store_true",
default=False, help="enable debugging")
parser.add_option("-U", "--unattended", dest="unattended",
action="store_true", default=False,
help="unattended installation never prompts the user")
parser.add_option("--uninstall", dest="uninstall", action="store_true",
default=False, help="Unconfigure automount")
options, args = parser.parse_args()
return options, args
def wait_for_sssd():
"""
It takes a bit for sssd to get going, lets loop until it is
serving data.
This function returns nothing.
"""
n = 0
found = False
time.sleep(1)
while n < 10 and not found:
try:
ipautil.run(["getent", "passwd", "admin"])
found = True
except Exception, e:
time.sleep(1)
n = n + 1
# This should never happen but if it does, may as well warn the user
if not found:
root_logger.debug("Unable to find 'admin' user with 'getent passwd admin'!")
print "Unable to find 'admin' user with 'getent passwd admin'!"
print "This may mean that sssd didn't re-start properly after the configuration changes."
def configure_xml(fstore):
from lxml import etree
fstore.backup_file(AUTOFS_LDAP_AUTH)
try:
f = open(AUTOFS_LDAP_AUTH, 'r')
lines = f.read()
f.close()
saslconf = etree.fromstring(lines)
element = saslconf.xpath('//autofs_ldap_sasl_conf')
root = saslconf.getroottree()
except IOError, e:
root_logger.debug('Unable to open file %s' % e)
root_logger.debug('Creating new from template')
element = [etree.Element('autofs_ldap_sasl_conf')]
root = element[0].getroottree()
if len(element) != 1:
raise RuntimeError('Unable to parse %s' % AUTOFS_LDAP_AUTH)
element[0].set('usetls', 'no')
element[0].set('tlsrequired', 'no')
element[0].set('authrequired', 'yes')
element[0].set('authtype', 'GSSAPI')
element[0].set('clientprinc', 'host/%s@%s' % (api.env.host, api.env.realm))
newconf = open(AUTOFS_LDAP_AUTH, 'w')
try:
root.write(newconf, pretty_print=True, xml_declaration=True, encoding='UTF-8')
newconf.close()
except IOError, e:
print "Unable to write %s: %s" % (AUTOFS_LDAP_AUTH, e)
print "Configured %s" % AUTOFS_LDAP_AUTH
def configure_nsswitch(fstore, options):
"""
Point automount to ldap in nsswitch.conf
"""
fstore.backup_file(NSSWITCH_CONF)
conf = ipachangeconf.IPAChangeConf("IPA Installer")
conf.setOptionAssignment(':')
if options.sssd:
nss_value = ' sss files'
else:
nss_value = ' ldap files'
opts = [{'name':'automount', 'type':'option', 'action':'set', 'value':nss_value},
{'name':'empty', 'type':'empty'}]
conf.changeConf(NSSWITCH_CONF, opts)
print "Configured %s" % NSSWITCH_CONF
def configure_autofs_sssd(fstore, statestore, autodiscover, options):
try:
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.import_config()
domains = sssdconfig.list_active_domains()
except Exception, e:
sys.exit(e)
if 'autofs' not in sssdconfig.list_services():
sssdconfig.new_service('autofs')
try:
sssdconfig.activate_service('autofs')
except SSSDConfig.NoServiceError:
print "Unable to activate the autofs service in SSSD config."
root_logger.debug("Unable to activate the autofs service in SSSD config.")
domain = None
for name in domains:
domain = sssdconfig.get_domain(name)
try:
provider = domain.get_option('id_provider')
except SSSDConfig.NoOptionError:
continue
if provider == "ipa":
domain.add_provider('ipa', 'autofs')
try:
location = domain.get_option('ipa_automount_location')
sys.exit('An automount location is already configured')
except SSSDConfig.NoOptionError:
domain.set_option('ipa_automount_location', options.location)
break
if domain is None:
sys.exit('SSSD is not configured.')
sssdconfig.save_domain(domain)
sssdconfig.write("/etc/sssd/sssd.conf")
statestore.backup_state('autofs', 'sssd', True)
sssd = ipaservices.service('sssd')
sssd.restart()
print "Restarting sssd, waiting for it to become available."
wait_for_sssd()
def configure_autofs(fstore, statestore, autodiscover, server, options):
"""
fstore: the FileStore to back up files in
options.server: the IPA server to use
options.location: the Automount location to use
"""
if not autodiscover:
ldap_uri = "ldap://%s" % server
else:
ldap_uri = "ldap:///%s" % api.env.basedn
search_base = str(DN(('cn', options.location), api.env.container_automount, api.env.basedn))
replacevars = {
'MAP_OBJECT_CLASS': 'automountMap',
'ENTRY_OBJECT_CLASS': 'automount',
'MAP_ATTRIBUTE': 'automountMapName',
'ENTRY_ATTRIBUTE': 'automountKey',
'VALUE_ATTRIBUTE': 'automountInformation',
'SEARCH_BASE': search_base,
'LDAP_URI': ldap_uri,
}
ipautil.backup_config_and_replace_variables(fstore,
AUTOFS_CONF, replacevars=replacevars)
ipaservices.restore_context(AUTOFS_CONF)
statestore.backup_state('autofs', 'sssd', False)
print "Configured %s" % AUTOFS_CONF
def configure_autofs_common(fstore, statestore, options):
autofs = ipaservices.knownservices.autofs
statestore.backup_state('autofs', 'enabled', autofs.is_enabled())
statestore.backup_state('autofs', 'running', autofs.is_running())
try:
autofs.restart()
print "Started %s" % autofs.service_name
except Exception, e:
root_logger.error("%s failed to restart: %s", autofs.service_name, e)
try:
autofs.enable()
except Exception, e:
print "Failed to configure automatic startup of the %s daemon" % (autofs.service_name)
root_logger.error("Failed to enable automatic startup of the %s daemon: %s" % (autofs.service_name, str(e)))
def uninstall(fstore, statestore):
print "Restoring configuration"
if fstore.has_file(AUTOFS_CONF):
fstore.restore_file(AUTOFS_CONF)
if fstore.has_file(NSSWITCH_CONF):
fstore.restore_file(NSSWITCH_CONF)
if fstore.has_file(AUTOFS_LDAP_AUTH):
fstore.restore_file(AUTOFS_LDAP_AUTH)
if fstore.has_file(NFS_CONF):
fstore.restore_file(NFS_CONF)
if fstore.has_file(IDMAPD_CONF):
fstore.restore_file(IDMAPD_CONF)
if statestore.has_state('autofs'):
enabled = statestore.restore_state('autofs', 'enabled')
running = statestore.restore_state('autofs', 'running')
sssd = statestore.restore_state('autofs', 'sssd')
autofs = ipaservices.knownservices.autofs
if not enabled:
autofs.disable()
if not running:
autofs.stop()
if sssd:
try:
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.import_config()
sssdconfig.deactivate_service('autofs')
domains = sssdconfig.list_active_domains()
for name in domains:
domain = sssdconfig.get_domain(name)
try:
provider = domain.get_option('id_provider')
except SSSDConfig.NoOptionError:
continue
if provider == "ipa":
domain.remove_option('ipa_automount_location')
domain.remove_provider('autofs')
break
sssdconfig.save_domain(domain)
sssdconfig.write("/etc/sssd/sssd.conf")
sssd = ipaservices.service('sssd')
sssd.restart()
wait_for_sssd()
except Exception, e:
print 'Unable to restore SSSD configuration: %s' % str(e)
root_logger.debug('Unable to restore SSSD configuration: %s' % str(e))
if statestore.has_state('rpcidmapd'):
enabled = statestore.restore_state('rpcidmapd', 'enabled')
running = statestore.restore_state('rpcidmapd', 'running')
rpcidmapd = ipaservices.knownservices.rpcidmapd
if not enabled:
rpcidmapd.disable()
if not running:
rpcidmapd.stop()
if statestore.has_state('rpcgssd'):
enabled = statestore.restore_state('rpcgssd', 'enabled')
running = statestore.restore_state('rpcgssd', 'running')
rpcgssd = ipaservices.knownservices.rpcgssd
if not enabled:
rpcgssd.disable()
if not running:
rpcgssd.stop()
return 0
def configure_nfs(fstore, statestore):
"""
Configure secure NFS
"""
replacevars = {
'SECURE_NFS': 'yes',
}
ipautil.backup_config_and_replace_variables(fstore,
NFS_CONF, replacevars=replacevars)
ipaservices.restore_context(NFS_CONF)
print "Configured %s" % NFS_CONF
# Prepare the changes
# We need to use IPAChangeConf as simple regexp substitution
# does not cut it here
conf = ipachangeconf.IPAChangeConf("IPA automount installer")
conf.case_insensitive_sections = False
conf.setOptionAssignment(" = ")
conf.setSectionNameDelimiters(("[", "]"))
changes = [conf.setOption('Domain', api.env.domain)]
section_with_changes = [conf.setSection('General', changes)]
# Backup the file and apply the changes
fstore.backup_file(IDMAPD_CONF)
conf.changeConf(IDMAPD_CONF, section_with_changes)
ipaservices.restore_context(IDMAPD_CONF)
print "Configured %s" % IDMAPD_CONF
rpcidmapd = ipaservices.knownservices.rpcidmapd
statestore.backup_state('rpcidmapd', 'enabled', rpcidmapd.is_enabled())
statestore.backup_state('rpcidmapd', 'running', rpcidmapd.is_running())
try:
rpcidmapd.restart()
print "Started %s" % rpcidmapd.service_name
except Exception, e:
root_logger.error("%s failed to restart: %s", rpcidmapd.service_name, e)
try:
rpcidmapd.enable()
except Exception, e:
print "Failed to configure automatic startup of the %s daemon" % (rpcidmapd.service_name)
root_logger.error("Failed to enable automatic startup of the %s daemon: %s" % (rpcidmapd.service_name, str(e)))
rpcgssd = ipaservices.knownservices.rpcgssd
statestore.backup_state('rpcgssd', 'enabled', rpcgssd.is_enabled())
statestore.backup_state('rpcgssd', 'running', rpcgssd.is_running())
try:
rpcgssd.restart()
print "Started %s" % rpcgssd.service_name
except Exception, e:
root_logger.error("%s failed to restart: %s", rpcgssd.service_name, e)
try:
rpcgssd.enable()
except Exception, e:
print "Failed to configure automatic startup of the %s daemon" % (rpcgssd.service_name)
root_logger.error("Failed to enable automatic startup of the %s daemon: %s" % (rpcgssd.service_name, str(e)))
def main():
fstore = sysrestore.FileStore('/var/lib/ipa-client/sysrestore')
statestore = sysrestore.StateFile('/var/lib/ipa-client/sysrestore')
if not fstore.has_files():
sys.exit('IPA client is not configured on this system.\n')
options, args = parse_options()
standard_logging_setup(
'/var/log/ipaclient-install.log', verbose=False, debug=options.debug,
filemode='a', console_format='%(message)s')
cfg = dict(
context='cli_installer',
in_server=False,
debug=options.debug,
verbose=0,
)
api.bootstrap(**cfg)
api.finalize()
ca_cert_path = None
if os.path.exists(CACERT):
ca_cert_path = CACERT
if options.uninstall:
return uninstall(fstore, statestore)
if statestore.has_state('autofs'):
sys.exit('automount is already configured on this system.\n')
autodiscover = False
servers = []
ds = ipadiscovery.IPADiscovery()
if not options.server:
print "Searching for IPA server..."
ret = ds.search(ca_cert_path=ca_cert_path)
root_logger.debug('Executing DNS discovery')
if ret == ipadiscovery.NO_LDAP_SERVER:
root_logger.debug('Autodiscovery did not find LDAP server')
s = urlparse.urlsplit(api.env.xmlrpc_uri)
server = [s.netloc]
root_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')
root_logger.debug('Autodiscovery success, possible servers %s' % ','.join(ds.servers))
server = ds.servers[0]
else:
server = options.server
root_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:
root_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
root_logger.debug('Using fixed server %s' % server)
else:
print "IPA server: DNS discovery"
root_logger.debug('Configuring to use DNS discovery')
search_base = str(DN(('cn', options.location), api.env.container_automount, api.env.basedn))
print "Location: %s" % options.location
root_logger.debug('Using automount location %s' % options.location)
# Verify that the location is valid
(ccache_fd, ccache_name) = tempfile.mkstemp()
os.close(ccache_fd)
try:
try:
os.environ['KRB5CCNAME'] = ccache_name
ipautil.run(['/usr/bin/kinit', '-k', '-t', '/etc/krb5.keytab', 'host/%s@%s' % (api.env.host, api.env.realm)])
except ipautil.CalledProcessError, e:
sys.exit("Failed to obtain host TGT.")
# Now we have a TGT, connect to IPA
try:
api.Backend.xmlclient.connect()
except errors.KerberosError, e:
sys.exit('Cannot connect to the server due to ' + str(e))
try:
# Use the RPC directly so older servers are supported
result = api.Backend.xmlclient.forward(
'automountlocation_show',
unicode(options.location),
version=u'2.0',
)
except errors.VersionError, 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, e:
sys.exit("Cannot connect to the server due to generic error: %s" % str(e))
finally:
os.remove(ccache_name)
if not options.unattended and not ipautil.user_input("Continue to configure the system with these values?", False):
sys.exit("Installation aborted")
try:
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, 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, e:
sys.exit(e)
except RuntimeError, e:
sys.exit(e)
except (KeyboardInterrupt, EOFError):
sys.exit(1)