nova 宿主机重启自动恢复虚拟机运行状态

1.1 参数描述与默认值

# Whether to start guests that were running before the host rebooted (boolean
# value)
#resume_guests_state_on_host_boot=false

1.2 修改配置为状态恢复

resume_guests_state_on_host_boot=true