红帽全球峰会11.3. 停用实例
在紧急情况下，如系统故障或访问失败，您可以将实例置于救援模式。这会关闭实例，使用新实例磁盘重启它，并将原始实例磁盘和配置驱动器挂载为重启实例中的卷。您可以连接到重启的实例，以查看原始实例磁盘，以修复系统并恢复您的数据。
流程
执行实例救援：
$ openstack server rescue [--image <image>] <instance>-
可选： 默认情况下，实例从云管理员提供的救援镜像引导，或者原始实例镜像的新副本。使用
--image选项指定在救援模式中重启实例时要使用的替代镜像。 -
将 &
lt;instance> 替换为您要救援的实例的名称或 ID。
-
可选： 默认情况下，实例从云管理员提供的救援镜像引导，或者原始实例镜像的新副本。使用
- 连接到 rescued 实例，以修复问题。
从正常引导磁盘重启实例：
$ openstack server unrescue <instance>
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