def r_detach_disk(disk_uuid):
args_rules = [Rules.DISK_UUID.value]
try:
ji.Check.previewing(args_rules, {'disk_uuid': disk_uuid})
disk = Disk()
disk.uuid = disk_uuid
disk.get_by('uuid')
ret = dict()
ret['state'] = ji.Common.exchange_state(20000)
if disk.state != DiskState.mounted.value or disk.sequence == 0:
# 表示未被任何实例使用，已被分离
# 序列为 0 的表示实例系统盘，系统盘不可以被分离
# TODO: 系统盘单独范围其它状态
return ret
guest = Guest()
guest.uuid = disk.guest_uuid
guest.get_by('uuid')
# 判断 Guest 是否处于可用状态
if guest.status in (status.GuestState.no_state.value,
status.GuestState.dirty.value):
ret['state'] = ji.Common.exchange_state(41259)
return ret
config = Config()
config.id = 1
config.get()
guest_xml = GuestXML(guest=guest, disk=disk, config=config)
message = {
'_object': 'guest',
'action': 'detach_disk',
'uuid': disk.guest_uuid,
'node_id': guest.node_id,
'xml': guest_xml.get_disk(),
'passback_parameters': {
'disk_uuid': disk.uuid
}
}
Utils.emit_instruction(message=json.dumps(message))
disk.state = DiskState.unloading.value
disk.update()
return ret
except ji.PreviewingError, e:
return json.loads(e.message)
def r_attach_disk(uuid, disk_uuid):
args_rules = [Rules.UUID.value, Rules.DISK_UUID.value]
try:
ji.Check.previewing(args_rules, {'uuid': uuid, 'disk_uuid': disk_uuid})
guest = Guest()
guest.uuid = uuid
guest.get_by('uuid')
disk = Disk()
disk.uuid = disk_uuid
disk.get_by('uuid')
config = Config()
config.id = 1
config.get()
ret = dict()
ret['state'] = ji.Common.exchange_state(20000)
# 判断欲挂载的磁盘是否空闲
if disk.guest_uuid.__len__() > 0 or disk.state != DiskState.idle.value:
ret['state'] = ji.Common.exchange_state(41258)
return ret
# 判断 Guest 是否处于可用状态
if guest.status in (status.GuestState.no_state.value,
status.GuestState.dirty.value):
ret['state'] = ji.Common.exchange_state(41259)
return ret
# 判断 Guest 与 磁盘是否在同一宿主机上
if config.storage_mode in [
status.StorageMode.local.value,
status.StorageMode.shared_mount.value
]:
if guest.node_id != disk.node_id:
ret['state'] = ji.Common.exchange_state(41260)
return ret
# 通过检测未被使用的序列，来确定当前磁盘在目标 Guest 身上的序列
disk.guest_uuid = guest.uuid
disks, count = disk.get_by_filter(filter_str='guest_uuid:in:' +
guest.uuid)
already_used_sequence = list()
for _disk in disks:
already_used_sequence.append(_disk['sequence'])
for sequence in range(0, dev_table.__len__()):
if sequence not in already_used_sequence:
disk.sequence = sequence
break
disk.state = DiskState.mounting.value
guest_xml = GuestXML(guest=guest, disk=disk, config=config)
message = {
'_object': 'guest',
'action': 'attach_disk',
'uuid': uuid,
'node_id': guest.node_id,
'xml': guest_xml.get_disk(),
'passback_parameters': {
'disk_uuid': disk.uuid,
'sequence': disk.sequence
},
'disks': [disk.__dict__]
}
Utils.emit_instruction(message=json.dumps(message))
disk.update()
return ret
except ji.PreviewingError, e:
return json.loads(e.message)