由于测试MySQL5.5的复制功能，默认trove使用gtid，instance 一直处于 BACKUP 状态，trove reset-status 不能在 BACKUP 状态下运行，手动修改数据库
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修改 service_statuses 表中 status_id 字段为 0x16，十进为22
状态码查看文件
# trove/common/instance.py 97行
class ServiceStatuses(object):
RUNNING = ServiceStatus(0x01, 'running', 'ACTIVE')
BLOCKED = ServiceStatus(0x02, 'blocked', 'BLOCKED')
PAUSED = ServiceStatus(0x03, 'paused', 'SHUTDOWN')
SHUTDOWN = ServiceStatus(0x04, 'shutdown', 'SHUTDOWN')
CRASHED = ServiceStatus(0x06, 'crashed', 'SHUTDOWN')
FAILED = ServiceStatus(0x08, 'failed to spawn', 'FAILED')
BUILDING = ServiceStatus(0x09, 'building', 'BUILD')
PROMOTING = ServiceStatus(0x10, 'promoting replica', 'PROMOTE')
EJECTING = ServiceStatus(0x11, 'ejecting replica source', 'EJECT')
LOGGING = ServiceStatus(0x12, 'transferring guest logs', 'LOGGING')
UNKNOWN = ServiceStatus(0x16, 'unknown', 'ERROR')
NEW = ServiceStatus(0x17, 'new', 'NEW')
DELETED = ServiceStatus(0x05, 'deleted', 'DELETED')
FAILED_TIMEOUT_GUESTAGENT = ServiceStatus(0x18, 'guestagent error',
'ERROR')
INSTANCE_READY = ServiceStatus(0x19, 'instance ready', 'BUILD')
RESTART_REQUIRED = ServiceStatus(0x20, 'restart required',
'RESTART_REQUIRED')
新闻标题：通过数据库修改troveinstancestatus
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