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freeipa/ipaserver/install/ipa_backup.py
Jan Cholasta 7b0149f32b Improve validation of --instance and --backend options in ipa-restore 
https://fedorahosted.org/freeipa/ticket/4744

Reviewed-By: David Kupka <dkupka@redhat.com>
2014-12-09 13:46:29 +00:00

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# Authors: Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2013 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/>.
#
import os
import sys
import shutil
import tempfile
import time
import pwd
from optparse import OptionGroup
from ConfigParser import SafeConfigParser
from ipaplatform.paths import paths
from ipaplatform import services
from ipalib import api, errors
from ipapython import version
from ipapython.ipautil import run, write_tmp_file
from ipapython import admintool
from ipapython.config import IPAOptionParser
from ipapython.dn import DN
from ipaserver.install.dsinstance import realm_to_serverid, DS_USER
from ipaserver.install.replication import wait_for_task
from ipaserver.install import installutils
from ipapython import ipaldap
from ipalib.session import ISO8601_DATETIME_FMT
from ipalib.constants import CACERT
from ConfigParser import SafeConfigParser
"""
A test gpg can be generated like this:
# cat >keygen <<EOF
%echo Generating a standard key
Key-Type: RSA
Key-Length: 2048
Name-Real: IPA Backup
Name-Comment: IPA Backup
Name-Email: root@example.com
Expire-Date: 0
%pubring /root/backup.pub
%secring /root/backup.sec
%commit
%echo done
EOF
# gpg --batch --gen-key keygen
# gpg --no-default-keyring --secret-keyring /root/backup.sec \
--keyring /root/backup.pub --list-secret-keys
"""
def encrypt_file(filename, keyring, remove_original=True):
source = filename
dest = filename + '.gpg'
args = [paths.GPG,
'--batch',
'--default-recipient-self',
'-o', dest]
if keyring is not None:
args.append('--no-default-keyring')
args.append('--keyring')
args.append(keyring + '.pub')
args.append('--secret-keyring')
args.append(keyring + '.sec')
args.append('-e')
args.append(source)
(stdout, stderr, rc) = run(args, raiseonerr=False)
if rc != 0:
raise admintool.ScriptError('gpg failed: %s' % stderr)
if remove_original:
os.unlink(source)
return dest
class Backup(admintool.AdminTool):
command_name = 'ipa-backup'
log_file_name = paths.IPABACKUP_LOG
usage = "%prog [options]"
description = "Back up IPA files and databases."
dirs = (paths.IPA_HTML_DIR,
paths.ROOT_PKI,
paths.ETC_PKI_CA_DIR,
paths.PKI_TOMCAT,
paths.SYSCONFIG_PKI,
paths.HTTPD_ALIAS_DIR,
paths.VAR_LIB_PKI_DIR,
paths.VAR_LIB_PKI_CA_DIR,
paths.SYSRESTORE,
paths.IPA_CLIENT_SYSRESTORE,
paths.IPA_DNSSEC_DIR,
paths.SSSD_PUBCONF_KRB5_INCLUDE_D_DIR,
paths.AUTHCONFIG_LAST,
paths.VAR_LIB_CERTMONGER_DIR,
paths.VAR_LIB_IPA,
paths.VAR_RUN_DIRSRV_DIR,
paths.DIRSRV_LOCK_DIR,
)
files = (
paths.NAMED_CONF,
paths.NAMED_KEYTAB,
paths.RESOLV_CONF,
paths.SYSCONFIG_PKI_CA_DIR,
paths.SYSCONFIG_PKI_TOMCAT,
paths.SYSCONFIG_DIRSRV,
paths.SYSCONFIG_NTPD,
paths.SYSCONFIG_KRB5KDC_DIR,
paths.SYSCONFIG_PKI_CA_PKI_CA_DIR,
paths.SYSCONFIG_IPA_DNSKEYSYNCD,
paths.SYSOCNFIG_IPA_ODS_EXPORTER,
paths.SYSCONFIG_NAMED,
paths.SYSCONFIG_ODS,
paths.ETC_SYSCONFIG_AUTHCONFIG,
paths.IPA_NSSDB_PWDFILE_TXT,
paths.IPA_P11_KIT,
paths.SYSTEMWIDE_IPA_CA_CRT,
paths.NSSWITCH_CONF,
paths.KRB5_KEYTAB,
paths.SSSD_CONF,
paths.OPENLDAP_LDAP_CONF,
paths.LIMITS_CONF,
paths.HTTPD_PASSWORD_CONF,
paths.IPA_KEYTAB,
paths.HTTPD_IPA_PKI_PROXY_CONF,
paths.HTTPD_IPA_REWRITE_CONF,
paths.HTTPD_NSS_CONF,
paths.HTTPD_IPA_CONF,
paths.SSHD_CONFIG,
paths.SSH_CONFIG,
paths.KRB5_CONF,
CACERT,
paths.IPA_DEFAULT_CONF,
paths.DS_KEYTAB,
paths.NTP_CONF,
paths.SMB_CONF,
paths.SAMBA_KEYTAB,
paths.DOGTAG_ADMIN_P12,
paths.KRA_AGENT_PEM,
paths.CACERT_P12,
paths.KRB5KDC_KDC_CONF,
paths.SYSTEMD_IPA_SERVICE,
paths.SYSTEMD_SSSD_SERVICE,
paths.SYSTEMD_CERTMONGER_SERVICE,
paths.SYSTEMD_PKI_TOMCAT_SERVICE,
paths.SVC_LIST_FILE,
paths.OPENDNSSEC_CONF_FILE,
paths.OPENDNSSEC_KASP_FILE,
paths.DNSSEC_SOFTHSM2_CONF,
paths.DNSSEC_SOFTHSM_PIN_SO,
paths.IPA_ODS_EXPORTER_KEYTAB,
paths.IPA_DNSKEYSYNCD_KEYTAB,
) + tuple(
os.path.join(base, file)
for base in (paths.NSS_DB_DIR, paths.IPA_NSSDB_DIR)
for file in ('cert8.db', 'key3.db', 'secmod.db')
)
logs=(
paths.PKI_CA_LOG_DIR,
paths.VAR_LOG_PKI_DIR,
paths.VAR_LOG_SLAPD_PKI_IPA_DIR,
paths.VAR_LOG_HTTPD_DIR,
paths.IPASERVER_INSTALL_LOG,
paths.KADMIND_LOG,
paths.PKI_CA_INSTALL_LOG,
paths.MESSAGES,
paths.IPACLIENT_INSTALL_LOG,
paths.LOG_SECURE,
paths.IPASERVER_UNINSTALL_LOG,
paths.PKI_CA_UNINSTALL_LOG,
paths.IPACLIENT_UNINSTALL_LOG,
paths.NAMED_RUN,
)
def __init__(self, options, args):
super(Backup, self).__init__(options, args)
self._conn = None
self.files = list(self.files)
self.dirs = list(self.dirs)
self.logs = list(self.logs)
@classmethod
def add_options(cls, parser):
super(Backup, cls).add_options(parser, debug_option=True)
parser.add_option("--gpg-keyring", dest="gpg_keyring",
help="The gpg key name to be used (or full path)")
parser.add_option("--gpg", dest="gpg", action="store_true",
default=False, help="Encrypt the backup")
parser.add_option("--data", dest="data_only", action="store_true",
default=False, help="Backup only the data")
parser.add_option("--logs", dest="logs", action="store_true",
default=False, help="Include log files in backup")
parser.add_option("--online", dest="online", action="store_true",
default=False, help="Perform the LDAP backups online, for data only.")
def setup_logging(self, log_file_mode='a'):
super(Backup, self).setup_logging(log_file_mode='a')
def validate_options(self):
options = self.options
super(Backup, self).validate_options(needs_root=True)
installutils.check_server_configuration()
if options.gpg_keyring is not None:
if not os.path.exists(options.gpg_keyring + '.pub'):
raise admintool.ScriptError('No such key %s' %
options.gpg_keyring)
options.gpg = True
if options.online and not options.data_only:
self.option_parser.error("You cannot specify --online "
"without --data")
if options.gpg:
tmpfd = write_tmp_file('encryptme')
newfile = encrypt_file(tmpfd.name, options.gpg_keyring, False)
os.unlink(newfile)
if options.data_only and options.logs:
self.option_parser.error("You cannot specify --data "
"with --logs")
def run(self):
options = self.options
super(Backup, self).run()
api.bootstrap(in_server=False, context='backup')
api.finalize()
self.log.info("Preparing backup on %s", api.env.host)
pent = pwd.getpwnam(DS_USER)
self.top_dir = tempfile.mkdtemp("ipa")
os.chown(self.top_dir, pent.pw_uid, pent.pw_gid)
os.chmod(self.top_dir, 0750)
self.dir = os.path.join(self.top_dir, "ipa")
os.mkdir(self.dir, 0750)
os.chown(self.dir, pent.pw_uid, pent.pw_gid)
self.header = os.path.join(self.top_dir, 'header')
cwd = os.getcwd()
try:
dirsrv = services.knownservices.dirsrv
self.add_instance_specific_data()
# We need the dirsrv running to get the list of services
dirsrv.start(capture_output=False)
self.get_connection()
self.create_header(options.data_only)
if options.data_only:
if not options.online:
self.log.info('Stopping Directory Server')
dirsrv.stop(capture_output=False)
else:
self.log.info('Stopping IPA services')
run(['ipactl', 'stop'])
for instance in [realm_to_serverid(api.env.realm), 'PKI-IPA']:
if os.path.exists(paths.VAR_LIB_SLAPD_INSTANCE_DIR_TEMPLATE % instance):
if os.path.exists(paths.SLAPD_INSTANCE_DB_DIR_TEMPLATE % (instance, 'ipaca')):
self.db2ldif(instance, 'ipaca', online=options.online)
self.db2ldif(instance, 'userRoot', online=options.online)
self.db2bak(instance, online=options.online)
if not options.data_only:
self.file_backup(options)
self.finalize_backup(options.data_only, options.gpg, options.gpg_keyring)
if options.data_only:
if not options.online:
self.log.info('Starting Directory Server')
dirsrv.start(capture_output=False)
else:
self.log.info('Starting IPA service')
run(['ipactl', 'start'])
finally:
try:
os.chdir(cwd)
except Exception, e:
self.log.error('Cannot change directory to %s: %s' % (cwd, e))
shutil.rmtree(self.top_dir)
def add_instance_specific_data(self):
'''
Add instance-specific files and directories.
NOTE: this adds some things that may not get backed up, like the PKI-IPA
instance.
'''
for dir in [
paths.ETC_DIRSRV_SLAPD_INSTANCE_TEMPLATE % realm_to_serverid(api.env.realm),
paths.VAR_LIB_DIRSRV_INSTANCE_SCRIPTS_TEMPLATE % realm_to_serverid(api.env.realm),
paths.VAR_LIB_SLAPD_INSTANCE_DIR_TEMPLATE % realm_to_serverid(api.env.realm),
paths.VAR_LIB_SLAPD_PKI_IPA_DIR_TEMPLATE,
paths.USR_LIB_SLAPD_PKI_IPA_DIR,
paths.ETC_SLAPD_PKI_IPA_DIR,
paths.VAR_LIB_SLAPD_PKI_IPA_DIR_TEMPLATE,
self.__find_scripts_dir('PKI-IPA'),
]:
if os.path.exists(dir):
self.dirs.append(dir)
for file in [
paths.SYSCONFIG_DIRSRV_INSTANCE % realm_to_serverid(api.env.realm),
paths.SYSCONFIG_DIRSRV_PKI_IPA_DIR]:
if os.path.exists(file):
self.files.append(file)
for log in [
paths.VAR_LOG_DIRSRV_INSTANCE_TEMPLATE % realm_to_serverid(api.env.realm),]:
self.logs.append(log)
def get_connection(self):
'''
Create an ldapi connection and bind to it using autobind as root.
'''
if self._conn is not None:
return self._conn
self._conn = ipaldap.IPAdmin(host=api.env.host,
ldapi=True,
protocol='ldapi',
realm=api.env.realm)
try:
pw_name = pwd.getpwuid(os.geteuid()).pw_name
self._conn.do_external_bind(pw_name)
except Exception, e:
self.log.error("Unable to bind to LDAP server %s: %s" %
(self._conn.host, e))
return self._conn
def db2ldif(self, instance, backend, online=True):
'''
Create a LDIF backup of the data in this instance.
If executed online create a task and wait for it to complete.
For SELinux reasons this writes out to the 389-ds backup location
and we move it.
'''
self.log.info('Backing up %s in %s to LDIF' % (backend, instance))
now = time.localtime()
cn = time.strftime('export_%Y_%m_%d_%H_%M_%S')
dn = DN(('cn', cn), ('cn', 'export'), ('cn', 'tasks'), ('cn', 'config'))
ldifname = '%s-%s.ldif' % (instance, backend)
ldiffile = os.path.join(
paths.SLAPD_INSTANCE_LDIF_DIR_TEMPLATE % instance,
ldifname)
if online:
conn = self.get_connection()
ent = conn.make_entry(
dn,
{
'objectClass': ['top', 'extensibleObject'],
'cn': [cn],
'nsInstance': [backend],
'nsFilename': [ldiffile],
'nsUseOneFile': ['true'],
'nsExportReplica': ['true'],
}
)
try:
conn.add_entry(ent)
except Exception, e:
raise admintool.ScriptError('Unable to add LDIF task: %s'
% e)
self.log.info("Waiting for LDIF to finish")
wait_for_task(conn, dn)
else:
args = ['%s/db2ldif' % self.__find_scripts_dir(instance),
'-r',
'-n', backend,
'-a', ldiffile]
(stdout, stderr, rc) = run(args, raiseonerr=False)
if rc != 0:
self.log.critical("db2ldif failed: %s", stderr)
# Move the LDIF backup to our location
shutil.move(ldiffile, os.path.join(self.dir, ldifname))
def db2bak(self, instance, online=True):
'''
Create a BAK backup of the data and changelog in this instance.
If executed online create a task and wait for it to complete.
'''
self.log.info('Backing up %s' % instance)
now = time.localtime()
cn = time.strftime('backup_%Y_%m_%d_%H_%M_%S')
dn = DN(('cn', cn), ('cn', 'backup'), ('cn', 'tasks'), ('cn', 'config'))
bakdir = os.path.join(paths.SLAPD_INSTANCE_BACKUP_DIR_TEMPLATE % (instance, instance))
if online:
conn = self.get_connection()
ent = conn.make_entry(
dn,
{
'objectClass': ['top', 'extensibleObject'],
'cn': [cn],
'nsInstance': ['userRoot'],
'nsArchiveDir': [bakdir],
'nsDatabaseType': ['ldbm database'],
}
)
try:
conn.add_entry(ent)
except Exception, e:
raise admintool.ScriptError('Unable to to add backup task: %s'
% e)
self.log.info("Waiting for BAK to finish")
wait_for_task(conn, dn)
else:
args = ['%s/db2bak' % self.__find_scripts_dir(instance), bakdir]
(stdout, stderr, rc) = run(args, raiseonerr=False)
if rc != 0:
self.log.critical("db2bak failed: %s" % stderr)
shutil.move(bakdir, self.dir)
def file_backup(self, options):
def verify_directories(dirs):
return [s for s in dirs if os.path.exists(s)]
self.log.info("Backing up files")
args = ['tar',
'--exclude=/var/lib/ipa/backup',
'--xattrs',
'--selinux',
'-czf',
os.path.join(self.dir, 'files.tar')
]
args.extend(verify_directories(self.dirs))
args.extend(verify_directories(self.files))
if options.logs:
args.extend(verify_directories(self.logs))
(stdout, stderr, rc) = run(args, raiseonerr=False)
if rc != 0:
raise admintool.ScriptError('tar returned non-zero %d: %s' % (rc, stdout))
def create_header(self, data_only):
'''
Create the backup file header that contains the meta data about
this particular backup.
'''
config = SafeConfigParser()
config.add_section("ipa")
if data_only:
config.set('ipa', 'type', 'DATA')
else:
config.set('ipa', 'type', 'FULL')
config.set('ipa', 'time', time.strftime(ISO8601_DATETIME_FMT, time.gmtime()))
config.set('ipa', 'host', api.env.host)
config.set('ipa', 'ipa_version', str(version.VERSION))
config.set('ipa', 'version', '1')
dn = DN(('cn', api.env.host), ('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'), api.env.basedn)
services_cns = []
try:
conn = self.get_connection()
services = conn.get_entries(dn, conn.SCOPE_ONELEVEL)
except errors.NetworkError:
self.log.critical(
"Unable to obtain list of master services, continuing anyway")
except Exception, e:
self.log.error("Failed to read services from '%s': %s" %
(conn.host, e))
else:
services_cns = [s.single_value['cn'] for s in services]
config.set('ipa', 'services', ','.join(services_cns))
with open(self.header, 'w') as fd:
config.write(fd)
def finalize_backup(self, data_only=False, encrypt=False, keyring=None):
'''
Create the final location of the backup files and move the files
we've backed up there, optionally encrypting them.
This is done in a couple of steps. We have a directory that
contains the tarball of the files, a directory that contains
the db2bak output and an LDIF.
These, along with the header, are moved into a new subdirectory
in /var/lib/ipa/backup.
'''
if data_only:
backup_dir = os.path.join(paths.IPA_BACKUP_DIR, time.strftime('ipa-data-%Y-%m-%d-%H-%M-%S'))
filename = os.path.join(backup_dir, "ipa-data.tar")
else:
backup_dir = os.path.join(paths.IPA_BACKUP_DIR, time.strftime('ipa-full-%Y-%m-%d-%H-%M-%S'))
filename = os.path.join(backup_dir, "ipa-full.tar")
os.mkdir(backup_dir, 0700)
cwd = os.getcwd()
os.chdir(self.dir)
args = ['tar',
'--xattrs',
'--selinux',
'-czf',
filename,
'.'
]
(stdout, stderr, rc) = run(args, raiseonerr=False)
if rc != 0:
raise admintool.ScriptError('tar returned non-zero %d: %s' % (rc, stdout))
if encrypt:
self.log.info('Encrypting %s' % filename)
filename = encrypt_file(filename, keyring)
shutil.move(self.header, backup_dir)
self.log.info('Backed up to %s', backup_dir)
def __find_scripts_dir(self, instance):
"""
IPA stores its 389-ds scripts in a different directory than dogtag
does so we need to probe for it.
"""
if instance != 'PKI-IPA':
return os.path.join(paths.VAR_LIB_DIRSRV, 'scripts-%s' % instance)
else:
if sys.maxsize > 2**32L:
libpath = 'lib64'
else:
libpath = 'lib'
return os.path.join(paths.USR_DIR, libpath, 'dirsrv', 'slapd-PKI-IPA')
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