Imported Upstream version 4.6.2
This commit is contained in:
Mario Fetka
231
ipaserver/install/upgradeinstance.py
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231
ipaserver/install/upgradeinstance.py
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# Authors: Rob Crittenden <rcritten@redhat.com>
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#
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# Copyright (C) 2010 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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import logging
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import ldif
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import shutil
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import random
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import traceback
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from ipalib import api
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from ipaplatform.paths import paths
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from ipaplatform import services
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from ipaserver.install import installutils
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from ipaserver.install import schemaupdate
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from ipaserver.install import ldapupdate
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from ipaserver.install import service
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logger = logging.getLogger(__name__)
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DSE = 'dse.ldif'
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class GetEntryFromLDIF(ldif.LDIFParser):
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"""
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LDIF parser.
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To get results, method parse() must be called first, then method
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get_results() which return parsed entries
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"""
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def __init__(self, input_file, entries_dn=[]):
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"""
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Parse LDIF file.
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:param input_file: an LDIF file to be parsed
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:param entries_dn: list of DN which will be returned. All entries are
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returned if list is empty.
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"""
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ldif.LDIFParser.__init__(self, input_file)
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self.entries_dn = entries_dn
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self.results = {}
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def get_results(self):
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"""
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Returns results in dictionary {DN: entry, ...}
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"""
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return self.results
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def handle(self, dn, entry):
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if self.entries_dn and dn not in self.entries_dn:
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return
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self.results[dn] = entry
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class IPAUpgrade(service.Service):
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"""
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Update the LDAP data in an instance by turning off all network
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listeners and updating over ldapi. This way we know the server is
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quiet.
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"""
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def __init__(self, realm_name, files=[], schema_files=[]):
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"""
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realm_name: kerberos realm name, used to determine DS instance dir
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files: list of update files to process. If none use UPDATEDIR
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"""
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ext = ''
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rand = random.Random()
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for _i in range(8):
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h = "%02x" % rand.randint(0,255)
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ext += h
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super(IPAUpgrade, self).__init__("dirsrv", realm_name=realm_name)
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serverid = installutils.realm_to_serverid(realm_name)
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self.filename = '%s/%s' % (paths.ETC_DIRSRV_SLAPD_INSTANCE_TEMPLATE % serverid, DSE)
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self.savefilename = '%s/%s.ipa.%s' % (paths.ETC_DIRSRV_SLAPD_INSTANCE_TEMPLATE % serverid, DSE, ext)
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self.files = files
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self.modified = False
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self.serverid = serverid
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self.schema_files = schema_files
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def __start(self):
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srv = services.service(self.service_name, api)
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srv.start(self.serverid, ldapi=True)
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api.Backend.ldap2.connect()
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def __stop_instance(self):
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"""Stop only the main DS instance"""
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if api.Backend.ldap2.isconnected():
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api.Backend.ldap2.disconnect()
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super(IPAUpgrade, self).stop(self.serverid)
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def create_instance(self):
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ds_running = super(IPAUpgrade, self).is_running()
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if ds_running:
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self.step("stopping directory server", self.__stop_instance)
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self.step("saving configuration", self.__save_config)
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self.step("disabling listeners", self.__disable_listeners)
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self.step("enabling DS global lock", self.__enable_ds_global_write_lock)
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self.step("starting directory server", self.__start)
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if self.schema_files:
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self.step("updating schema", self.__update_schema)
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self.step("upgrading server", self.__upgrade)
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self.step("stopping directory server", self.__stop_instance,
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run_after_failure=True)
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self.step("restoring configuration", self.__restore_config,
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run_after_failure=True)
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if ds_running:
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self.step("starting directory server", self.__start)
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self.start_creation(start_message="Upgrading IPA:",
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show_service_name=False,
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runtime=90)
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def __save_config(self):
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shutil.copy2(self.filename, self.savefilename)
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with open(self.filename, "r") as in_file:
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parser = GetEntryFromLDIF(in_file, entries_dn=["cn=config"])
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parser.parse()
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try:
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config_entry = parser.get_results()["cn=config"]
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except KeyError:
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raise RuntimeError("Unable to find cn=config entry in %s" %
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self.filename)
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try:
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port = config_entry['nsslapd-port'][0].decode('utf-8')
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except KeyError:
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pass
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else:
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self.backup_state('nsslapd-port', port)
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try:
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security = config_entry['nsslapd-security'][0].decode('utf-8')
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except KeyError:
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pass
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else:
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self.backup_state('nsslapd-security', security)
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try:
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global_lock = config_entry[
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'nsslapd-global-backend-lock'][0].decode('utf-8')
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except KeyError:
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pass
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else:
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self.backup_state('nsslapd-global-backend-lock', global_lock)
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def __enable_ds_global_write_lock(self):
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ldif_outfile = "%s.modified.out" % self.filename
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with open(ldif_outfile, "w") as out_file:
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with open(self.filename, "r") as in_file:
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parser = installutils.ModifyLDIF(in_file, out_file)
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parser.replace_value(
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"cn=config", "nsslapd-global-backend-lock", [b"on"])
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parser.parse()
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shutil.copy2(ldif_outfile, self.filename)
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def __restore_config(self):
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port = self.restore_state('nsslapd-port')
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security = self.restore_state('nsslapd-security')
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global_lock = self.restore_state('nsslapd-global-backend-lock')
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ldif_outfile = "%s.modified.out" % self.filename
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with open(ldif_outfile, "w") as out_file:
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with open(self.filename, "r") as in_file:
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parser = installutils.ModifyLDIF(in_file, out_file)
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if port is not None:
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parser.replace_value(
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"cn=config", "nsslapd-port", [port.encode('utf-8')])
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if security is not None:
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parser.replace_value("cn=config", "nsslapd-security",
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[security.encode('utf-8')])
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# disable global lock by default
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parser.remove_value("cn=config", "nsslapd-global-backend-lock")
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if global_lock is not None:
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parser.add_value("cn=config", "nsslapd-global-backend-lock",
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[global_lock.encode('utf-8')])
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parser.parse()
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shutil.copy2(ldif_outfile, self.filename)
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def __disable_listeners(self):
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ldif_outfile = "%s.modified.out" % self.filename
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with open(ldif_outfile, "w") as out_file:
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with open(self.filename, "r") as in_file:
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parser = installutils.ModifyLDIF(in_file, out_file)
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parser.replace_value("cn=config", "nsslapd-port", [b"0"])
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parser.replace_value("cn=config", "nsslapd-security", [b"off"])
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parser.remove_value("cn=config", "nsslapd-ldapientrysearchbase")
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parser.parse()
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shutil.copy2(ldif_outfile, self.filename)
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def __update_schema(self):
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self.modified = schemaupdate.update_schema(
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self.schema_files,
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dm_password='', ldapi=True) or self.modified
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def __upgrade(self):
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try:
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ld = ldapupdate.LDAPUpdate(dm_password='', ldapi=True)
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if len(self.files) == 0:
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self.files = ld.get_all_files(ldapupdate.UPDATES_DIR)
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self.modified = (ld.update(self.files) or self.modified)
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except ldapupdate.BadSyntax as e:
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logger.error('Bad syntax in upgrade %s', e)
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raise
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except Exception as e:
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# Bad things happened, return gracefully
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logger.error('Upgrade failed with %s', e)
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logger.debug('%s', traceback.format_exc())
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raise RuntimeError(e)
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