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kvmfilebackup.py
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kvmfilebackup.py
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import os
import kvmcmdmgr
import kvmrunningmgr
import nbd
import nbdrwthread
import nettapmgr
import qemuimgcmd
import xlogging
_logger = xlogging.getLogger(__name__)
def read_kvm_file_backup_memory_mbytes(memory_mbytes=512):
file_path = r'/etc/aio/kvm_file_backup_memory_mbytes'
if os.path.isfile(file_path):
try:
with open(file_path) as f:
memory_mbytes = int(f.read().strip())
except Exception as e:
_logger.error(r'read_kvm_file_backup_memory_mbytes failed {}'.format(e))
return memory_mbytes
class KvmFileBackup(object):
# 需要启动kvm，要2个网卡，期中一个网卡要指定mac地址，2个硬盘。
# 参数: aio_server_ip, diskbytes, disksnapshots
def __init__(self, backup_params):
self.__kvm_running = None
self.__nbd_rw_thread = None
self.__kvm_cmd_mgr = None
self.__tap_nic = None
self.__mac_address = None
self.__ip_addr = None
self.__tap_name = None
self._backup_params = backup_params
self.__key_info = dict()
self.__key_info[r'logic'] = r'linux'
self.__key_info['cores'] = self._backup_params['cores']
self.__key_info['memory_mbytes'] = self._backup_params['memory_mbytes']
def create_nbd_device(self, backup_params):
_nbd_dev_name, _nbd_dev_number = self.__nbd_rw_thread.get_nbd_device_name()
_cmd_nbd_umount = "/sbin/aio/nbdrw -d {}".format(_nbd_dev_name)
_cmd_nbd_mount = "/sbin/aio/nbdrw -rw {} {}".format(_nbd_dev_name, backup_params['diskbytes'])
for _disk_snapshot in backup_params['disksnapshots']:
_cmd_nbd_mount += r' {} {}'.format(_disk_snapshot['path'], _disk_snapshot['ident'])
self.__nbd_rw_thread.setDaemon(True)
self.__nbd_rw_thread.start_and_wait_ready(_cmd_nbd_mount, _cmd_nbd_umount)
return _nbd_dev_name, _nbd_dev_number
def create_temp_qcow_file(self, temp_qcow_file):
try:
os.remove(temp_qcow_file)
except:
pass
qemuimgcmd.QemuImgCmd().create_qcow2_file_base_old('/home/file_backup/nas.qcow2',
temp_qcow_file)
if not os.path.exists(temp_qcow_file):
raise Exception("create filie failed:{}".format(temp_qcow_file))
def start(self):
try:
self.__nbd_rw_thread = nbdrwthread.NbdReadWriteThread()
# 启动nbd
_nbd_dev_name, _nbd_dev_number = self.create_nbd_device(self._backup_params)
self.__key_info['vnc'] = "0.0.0.0:{}".format(_nbd_dev_number + 200)
# 这里要打临时文件的快照。
self.create_temp_qcow_file(self._backup_params['temp_qcow'])
_blocks = [self._backup_params['temp_qcow'], _nbd_dev_name]
# kvm命令行管理。
self.__kvm_cmd_mgr = kvmcmdmgr.KvmCmdLineMgr(self.__key_info)
# 应该是 2 块硬盘。
for _file_path in _blocks:
self.__kvm_cmd_mgr.add_block_dev('scsi-hd', _file_path)
# 应该是 2 块网卡。
self.__tap_nic = nettapmgr.NetTapMgr(self._backup_params['aio_server_ip'], r'fbtap', r'172.29.110')
try:
self.__tap_nic.start()
except Exception as e:
msg = "start tap failed: {}".format(e)
_logger.error(msg)
raise Exception(msg)
self.__mac_address = self.__tap_nic.get_mac_address()
self.__ip_addr = self.__tap_nic.get_ip_address()
self.__tap_name = self.__tap_nic.get_tap_name()
self.__kvm_cmd_mgr.add_net_dev(r'virtio-net-pci', self.__tap_name, None, self.__mac_address)
# 获得 kvm 运行句柄。
self.__kvm_running = kvmrunningmgr.KvmRunningThread(self.__kvm_cmd_mgr)
self.__kvm_running.start()
except Exception:
self.kill()
self.join()
raise
def get_ip_and_mac(self):
return self.__ip_addr, self.__mac_address
def join(self):
_logger.info(r'KvmFileBackup start join')
if self.__kvm_running:
_logger.info(r'KvmFileBackup kvm running...')
self.__kvm_running.join()
self.__kvm_running = None
if self.__nbd_rw_thread:
_logger.info(r'KvmFileBackup __nbd_rw_thread...')
self.__nbd_rw_thread.umount()
self.__nbd_rw_thread.join()
self.__nbd_rw_thread = None
_logger.info(r'KvmFileBackup end join')
def kill(self):
_logger.info(r'KvmFileBackup start kill')
if self.__kvm_running:
self.__kvm_running.kill()
_logger.info(r'KvmFileBackup end kill')
def is_active(self):
if self.__kvm_running:
return self.__kvm_running.is_active()
return False
def nbd_alive(self):
if self.__nbd_rw_thread and self.__nbd_rw_thread.is_alive():
return True
else:
return False
def kvm_alive(self):
if self.__kvm_running and self.__kvm_running.is_active():
return True
else:
return False
class KvmDBBackup(object):
# 需要启动kvm，要2个网卡，期中一个网卡要指定mac地址，2个硬盘。
# 参数: aio_server_ip, diskbytes, disksnapshots
def __init__(self, backup_params):
self.__kvm_running = None
self.__nbd_rw_thread = None
self.__kvm_cmd_mgr = None
self.__tap_nic = None
self.__mac_address = None
self.__ip_addr = None
self.__tap_name = None
self._backup_params = backup_params
self.__key_info = dict()
self.__key_info[r'logic'] = r'linux'
self.__key_info['cores'] = self._backup_params['cores']
self.__key_info['memory_mbytes'] = self._backup_params['memory_mbytes']
def create_nbd_device(self, backup_params):
_nbd_dev_name, _nbd_dev_number = self.__nbd_rw_thread.get_nbd_device_name()
_cmd_nbd_umount = "/sbin/aio/nbdrw -d {}".format(_nbd_dev_name)
_cmd_nbd_mount = "/sbin/aio/nbdrw -rw {} {}".format(_nbd_dev_name, backup_params['diskbytes'])
for _disk_snapshot in backup_params['disksnapshots']:
_cmd_nbd_mount += r' {} {}'.format(_disk_snapshot['path'], _disk_snapshot['ident'])
self.__nbd_rw_thread.setDaemon(True)
self.__nbd_rw_thread.start_and_wait_ready(_cmd_nbd_mount, _cmd_nbd_umount)
return _nbd_dev_name, _nbd_dev_number
def create_temp_qcow_file(self, temp_qcow_file):
try:
os.remove(temp_qcow_file)
except:
pass
qemuimgcmd.QemuImgCmd().create_qcow2_file_base_old('/home/file_backup/nas.qcow2',
temp_qcow_file)
if not os.path.exists(temp_qcow_file):
raise Exception("create filie failed:{}".format(temp_qcow_file))
def start(self):
try:
self.__nbd_rw_thread = nbdrwthread.NbdReadWriteThread()
# 启动nbd
_nbd_dev_name, _nbd_dev_number = self.create_nbd_device(self._backup_params)
self.__key_info['vnc'] = "0.0.0.0:{}".format(_nbd_dev_number + 200)
# 这里要打临时文件的快照。
self.create_temp_qcow_file(self._backup_params['temp_qcow'])
_blocks = [self._backup_params['temp_qcow'], _nbd_dev_name]
# kvm命令行管理。
self.__kvm_cmd_mgr = kvmcmdmgr.KvmCmdLineMgr(self.__key_info)
# 应该是 2 块硬盘。
for _file_path in _blocks:
self.__kvm_cmd_mgr.add_block_dev('scsi-hd', _file_path)
# 应该是 2 块网卡。
self.__tap_nic = nettapmgr.NetTapMgr(self._backup_params['aio_server_ip'], r'fbtap', r'172.29.110')
try:
self.__tap_nic.start()
except Exception as e:
msg = "start tap failed: {}".format(e)
_logger.error(msg)
raise Exception(msg)
self.__mac_address = self.__tap_nic.get_mac_address()
self.__ip_addr = self.__tap_nic.get_ip_address()
self.__tap_name = self.__tap_nic.get_tap_name()
self.__kvm_cmd_mgr.add_net_dev(r'virtio-net-pci', self.__tap_name, None, self.__mac_address)
# 获得 kvm 运行句柄。
self.__kvm_running = kvmrunningmgr.KvmRunningThread(self.__kvm_cmd_mgr)
self.__kvm_running.start()
except Exception:
self.kill()
self.join()
raise
def get_ip_and_mac(self):
return self.__ip_addr, self.__mac_address
def join(self):
_logger.info(r'KvmFileBackup start join')
if self.__kvm_running:
_logger.info(r'KvmFileBackup kvm running...')
self.__kvm_running.join()
self.__kvm_running = None
if self.__nbd_rw_thread:
_logger.info(r'KvmFileBackup __nbd_rw_thread...')
self.__nbd_rw_thread.umount()
self.__nbd_rw_thread.join()
self.__nbd_rw_thread = None
_logger.info(r'KvmFileBackup end join')
def kill(self):
_logger.info(r'KvmFileBackup start kill')
if self.__kvm_running:
self.__kvm_running.kill()
_logger.info(r'KvmFileBackup end kill')
def is_active(self):
if self.__kvm_running:
return self.__kvm_running.is_active()
return False
def nbd_alive(self):
if self.__nbd_rw_thread and self.__nbd_rw_thread.is_alive():
return True
else:
return False
def kvm_alive(self):
if self.__kvm_running and self.__kvm_running.is_active():
return True
else:
return False
if __name__ == "__main__":
nbd.init(100)
backup_params = dict()
backup_params['aio_server_ip'] = '172.29.16.2'
backup_params['diskbytes'] = 1024 * 1024 * 1024 * 1024
backup_params['disksnapshots'] = [
{
'path': '/home/mnt/nodes/9f792d48fb564b94aeabaf75f0155f8a/images/4a56657040fe4722a705b10306b29e3f/7ce6901129de4bada1202c0fc1515cc9.qcow',
'ident': '01cb671e5a414f7c97b17eb3f09d3e59'}]
backup_params['temp_qcow'] = r'/home/temp.qcow'
backup_params['cores'] = 5
backup_params['memory_mbytes'] = 1024
_new_kvm = KvmFileBackup(backup_params)
_new_kvm.start()
_new_kvm.join()
print("end!")
pass