def restore_from_mysql(config,
copy,
dst_dir,
tmp_dir=None,
cache=None,
hostname=None):
"""
Restore MySQL datadir in a given directory
:param config: Tool configuration.
:type config: ConfigParser.ConfigParser
:param copy: Backup copy instance.
:type copy: MySQLCopy
:param dst_dir: Destination directory. Must exist and be empty.
:type dst_dir: str
:param tmp_dir: Path to temp directory
:type tmp_dir: str
:param cache: Local cache object.
:type cache: Cache
:param hostname: Hostname
:type hostname: str
"""
LOG.info('Restoring %s in %s', copy, dst_dir)
mkdir_p(dst_dir)
dst = None
restore_start = time.time()
try:
xtrabackup_binary = config.get('mysql', 'xtrabackup_binary')
except ConfigParser.NoOptionError:
xtrabackup_binary = XTRABACKUP_BINARY
try:
xbstream_binary = config.get('mysql', 'xbstream_binary')
except ConfigParser.NoOptionError:
xbstream_binary = XBSTREAM_BINARY
try:
keep_local_path = config.get('destination', 'keep_local_path')
if osp.exists(osp.join(keep_local_path, copy.key)):
dst = Local(keep_local_path)
except ConfigParser.NoOptionError:
pass
if not dst:
if not hostname:
hostname = copy.host
if not hostname:
raise DestinationError('Failed to get hostname from %s' % copy)
dst = get_destination(config, hostname=hostname)
key = copy.key
status = dst.status()
stream = dst.get_stream(copy)
if status[key].type == "full":
cache_key = os.path.basename(key)
if cache:
if cache_key in cache:
# restore from cache
cache.restore_in(cache_key, dst_dir)
else:
restore_from_mysql_full(stream,
dst_dir,
config,
redo_only=False,
xtrabackup_binary=xtrabackup_binary,
xbstream_binary=xbstream_binary)
cache.add(dst_dir, cache_key)
else:
restore_from_mysql_full(stream,
dst_dir,
config,
redo_only=False,
xtrabackup_binary=xtrabackup_binary,
xbstream_binary=xbstream_binary)
else:
full_copy = status.candidate_parent(copy.run_type)
full_stream = dst.get_stream(full_copy)
LOG.debug("Full parent copy is %s", full_copy.key)
cache_key = os.path.basename(full_copy.key)
if cache:
if cache_key in cache:
# restore from cache
cache.restore_in(cache_key, dst_dir)
else:
restore_from_mysql_full(full_stream,
dst_dir,
config,
redo_only=True,
xtrabackup_binary=xtrabackup_binary,
xbstream_binary=xbstream_binary)
cache.add(dst_dir, cache_key)
else:
restore_from_mysql_full(full_stream,
dst_dir,
config,
redo_only=True,
xtrabackup_binary=xtrabackup_binary,
xbstream_binary=xbstream_binary)
restore_from_mysql_incremental(stream,
dst_dir,
config,
tmp_dir,
xtrabackup_binary=xtrabackup_binary,
xbstream_binary=xbstream_binary)
config_dir = os.path.join(dst_dir, "_config")
for path, content in get_my_cnf(status, key):
config_sub_dir = os.path.join(config_dir,
os.path.dirname(path).lstrip('/'))
mkdir_p(config_sub_dir, mode=0755)
with open(os.path.join(config_sub_dir, os.path.basename(path)),
'w') as mysql_config:
mysql_config.write(content)
update_grastate(dst_dir, status, key)
export_info(config,
data=time.time() - restore_start,
category=ExportCategory.mysql,
measure_type=ExportMeasureType.restore)
LOG.info('Successfully restored %s in %s.', copy.key, dst_dir)
LOG.info(
'Now copy content of %s to MySQL datadir: '
'cp -R %s /var/lib/mysql/', dst_dir, osp.join(dst_dir, '*'))
LOG.info('Fix permissions: chown -R mysql:mysql /var/lib/mysql/')
LOG.info(
'Make sure innodb_log_file_size and innodb_log_files_in_group '
'in %s/backup-my.cnf and in /etc/my.cnf are same.', dst_dir)
if osp.exists(config_dir):
LOG.info('Original my.cnf is restored in %s.', config_dir)
LOG.info('Then you can start MySQL normally.')
def callback(self, **kwargs):
local_dst = Local(kwargs['keep_local_path'])
local_dst.status(kwargs['dst'].status())
def restore_from_mysql(config, backup_copy, dst_dir, cache=None):
"""
Restore MySQL datadir in a given directory
:param config: Tool configuration.
:type config: ConfigParser.ConfigParser
:param backup_copy: Backup copy name.
:type backup_copy: str
:param dst_dir: Destination directory. Must exist and be empty.
:type dst_dir: str
:param cache: Local cache object.
:type cache: Cache
"""
LOG.info('Restoring %s in %s', backup_copy, dst_dir)
mkdir_p(dst_dir)
dst = None
try:
keep_local_path = config.get('destination', 'keep_local_path')
if os.path.exists(backup_copy) \
and backup_copy.startswith(keep_local_path):
dst = Local(keep_local_path)
except ConfigParser.NoOptionError:
pass
if not dst:
hostname = get_hostname_from_backup_copy(backup_copy)
if not hostname:
raise DestinationError('Failed to get hostname from %s'
% backup_copy)
dst = get_destination(config, hostname=hostname)
key = dst.basename(backup_copy)
status = dst.status()
stream = dst.get_stream(backup_copy)
if get_backup_type(status, key) == "full":
cache_key = os.path.basename(key)
if cache:
if cache_key in cache:
# restore from cache
cache.restore_in(cache_key, dst_dir)
else:
restore_from_mysql_full(stream, dst_dir, config)
cache.add(dst_dir, cache_key)
else:
restore_from_mysql_full(stream, dst_dir, config)
else:
full_copy = dst.get_full_copy_name(backup_copy)
full_stream = dst.get_stream(full_copy)
cache_key = os.path.basename(full_copy)
if cache:
if cache_key in cache:
# restore from cache
cache.restore_in(cache_key, dst_dir)
else:
restore_from_mysql_full(full_stream, dst_dir,
config, redo_only=True)
cache.add(dst_dir, cache_key)
else:
restore_from_mysql_full(full_stream, dst_dir,
config, redo_only=True)
restore_from_mysql_incremental(stream, dst_dir, config)
config_dir = os.path.join(dst_dir, "_config")
for path, content in get_my_cnf(status, key):
config_sub_dir = os.path.join(config_dir,
os.path.dirname(path).lstrip('/'))
os.makedirs(config_sub_dir)
with open(os.path.join(config_sub_dir,
os.path.basename(path)), 'w') as mysql_config:
mysql_config.write(content)
update_grastate(dst_dir, status, key)
LOG.info('Successfully restored %s in %s.', backup_copy, dst_dir)
LOG.info('Now copy content of %s to MySQL datadir: '
'cp -R %s/* /var/lib/mysql/', dst_dir, dst_dir)
LOG.info('Fix permissions: chown -R mysql:mysql /var/lib/mysql/')
LOG.info('Make sure innodb_log_file_size and innodb_log_files_in_group '
'in %s/backup-my.cnf and in /etc/my.cnf are same.', dst_dir)
if os.path.exists(config_dir):
LOG.info('Original my.cnf is restored in %s.', config_dir)
LOG.info('Then you can start MySQL normally.')