# Authors: Rob Crittenden # # Copyright (C) 2010 Red Hat # see file 'COPYING' for use and warranty information # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # from __future__ import absolute_import import logging import ldif import shutil import random import traceback from ipalib import api from ipaplatform.paths import paths from ipaplatform import services from ipaserver.install import installutils from ipaserver.install import schemaupdate from ipaserver.install import ldapupdate from ipaserver.install import service logger = logging.getLogger(__name__) DSE = 'dse.ldif' class GetEntryFromLDIF(ldif.LDIFParser): """ LDIF parser. To get results, method parse() must be called first, then method get_results() which return parsed entries """ def __init__(self, input_file, entries_dn=[]): """ Parse LDIF file. :param input_file: an LDIF file to be parsed :param entries_dn: list of DN which will be returned. All entries are returned if list is empty. """ ldif.LDIFParser.__init__(self, input_file) self.entries_dn = entries_dn self.results = {} def get_results(self): """ Returns results in dictionary {DN: entry, ...} """ return self.results def handle(self, dn, entry): if self.entries_dn and dn not in self.entries_dn: return self.results[dn] = entry class IPAUpgrade(service.Service): """ Update the LDAP data in an instance by turning off all network listeners and updating over ldapi. This way we know the server is quiet. """ def __init__(self, realm_name, files=[], schema_files=[]): """ realm_name: kerberos realm name, used to determine DS instance dir files: list of update files to process. If none use UPDATEDIR """ ext = '' rand = random.Random() for _i in range(8): h = "%02x" % rand.randint(0,255) ext += h super(IPAUpgrade, self).__init__("dirsrv", realm_name=realm_name) serverid = installutils.realm_to_serverid(realm_name) self.filename = '%s/%s' % (paths.ETC_DIRSRV_SLAPD_INSTANCE_TEMPLATE % serverid, DSE) self.savefilename = '%s/%s.ipa.%s' % (paths.ETC_DIRSRV_SLAPD_INSTANCE_TEMPLATE % serverid, DSE, ext) self.files = files self.modified = False self.serverid = serverid self.schema_files = schema_files def __start(self): srv = services.service(self.service_name, api) srv.start(self.serverid, ldapi=True) api.Backend.ldap2.connect() def __stop_instance(self): """Stop only the main DS instance""" if api.Backend.ldap2.isconnected(): api.Backend.ldap2.disconnect() super(IPAUpgrade, self).stop(self.serverid) def create_instance(self): ds_running = super(IPAUpgrade, self).is_running() if ds_running: self.step("stopping directory server", self.__stop_instance) self.step("saving configuration", self.__save_config) self.step("disabling listeners", self.__disable_listeners) self.step("enabling DS global lock", self.__enable_ds_global_write_lock) self.step("starting directory server", self.__start) if self.schema_files: self.step("updating schema", self.__update_schema) self.step("upgrading server", self.__upgrade) self.step("stopping directory server", self.__stop_instance, run_after_failure=True) self.step("restoring configuration", self.__restore_config, run_after_failure=True) if ds_running: self.step("starting directory server", self.__start) self.start_creation(start_message="Upgrading IPA:", show_service_name=False, runtime=90) def __save_config(self): shutil.copy2(self.filename, self.savefilename) with open(self.filename, "r") as in_file: parser = GetEntryFromLDIF(in_file, entries_dn=["cn=config"]) parser.parse() try: config_entry = parser.get_results()["cn=config"] except KeyError: raise RuntimeError("Unable to find cn=config entry in %s" % self.filename) try: port = config_entry['nsslapd-port'][0].decode('utf-8') except KeyError: pass else: self.backup_state('nsslapd-port', port) try: security = config_entry['nsslapd-security'][0].decode('utf-8') except KeyError: pass else: self.backup_state('nsslapd-security', security) try: global_lock = config_entry[ 'nsslapd-global-backend-lock'][0].decode('utf-8') except KeyError: pass else: self.backup_state('nsslapd-global-backend-lock', global_lock) def __enable_ds_global_write_lock(self): ldif_outfile = "%s.modified.out" % self.filename with open(ldif_outfile, "w") as out_file: with open(self.filename, "r") as in_file: parser = installutils.ModifyLDIF(in_file, out_file) parser.replace_value( "cn=config", "nsslapd-global-backend-lock", [b"on"]) parser.parse() shutil.copy2(ldif_outfile, self.filename) def __restore_config(self): port = self.restore_state('nsslapd-port') security = self.restore_state('nsslapd-security') global_lock = self.restore_state('nsslapd-global-backend-lock') ldif_outfile = "%s.modified.out" % self.filename with open(ldif_outfile, "w") as out_file: with open(self.filename, "r") as in_file: parser = installutils.ModifyLDIF(in_file, out_file) if port is not None: parser.replace_value( "cn=config", "nsslapd-port", [port.encode('utf-8')]) if security is not None: parser.replace_value("cn=config", "nsslapd-security", [security.encode('utf-8')]) # disable global lock by default parser.remove_value("cn=config", "nsslapd-global-backend-lock") if global_lock is not None: parser.add_value("cn=config", "nsslapd-global-backend-lock", [global_lock.encode('utf-8')]) parser.parse() shutil.copy2(ldif_outfile, self.filename) def __disable_listeners(self): ldif_outfile = "%s.modified.out" % self.filename with open(ldif_outfile, "w") as out_file: with open(self.filename, "r") as in_file: parser = installutils.ModifyLDIF(in_file, out_file) parser.replace_value("cn=config", "nsslapd-port", [b"0"]) parser.replace_value("cn=config", "nsslapd-security", [b"off"]) parser.remove_value("cn=config", "nsslapd-ldapientrysearchbase") parser.parse() shutil.copy2(ldif_outfile, self.filename) def __update_schema(self): self.modified = schemaupdate.update_schema( self.schema_files, dm_password='', ldapi=True) or self.modified def __upgrade(self): try: ld = ldapupdate.LDAPUpdate(dm_password='', ldapi=True) if len(self.files) == 0: self.files = ld.get_all_files(ldapupdate.UPDATES_DIR) self.modified = (ld.update(self.files) or self.modified) except ldapupdate.BadSyntax as e: logger.error('Bad syntax in upgrade %s', e) raise except Exception as e: # Bad things happened, return gracefully logger.error('Upgrade failed with %s', e) logger.debug('%s', traceback.format_exc()) raise RuntimeError(e)