Launch Instance---source for openstack

If you want to create an instance that uses ephemeral storage, meaning the instance data is lost when the instance is deleted, then choose one of the following boot sources:

    Image: This option uses an image to boot the instance.
    Instance Snapshot: This option uses an instance snapshot to boot the instance.

If you want to create an instance that uses persistent storage, meaning the instance data is saved when the instance is deleted, then select one of the following boot options:

    Image (with Create New Volume checked): This options uses an image to boot the instance, and creates a new volume to persist instance data. You can specify volume size and whether to delete the volume on deletion of the instance.
    Volume: This option uses a volume that already exists. It does not create a new volume. You can choose to delete the volume on deletion of the instance. Note: when selecting Volume, you can only launch one instance.
    Volume Snapshot: This option uses a volume snapshot to boot the instance, and creates a new volume to persist instance data. You can choose to delete the volume on deletion of the instance.

如果希望创建使用临时存储的实例,这意味着删除实例时实例数据丢失,则选择以下引导源之一:
图像:此选项使用图像启动实例。
实例快照:此选项使用实例快照来启动实例。

如果希望创建使用持久存储的实例,这意味着删除实例时保存实例数据,则选择以下引导选项之一:
图像(选中Create New Volume):此选项使用图像引导实例,并创建新卷来持久化实例数据。您可以指定卷大小以及是否在删除实例时删除卷。
卷:这个选项使用已经存在的卷。它不会创建新的卷。您可以选择在删除实例时删除卷。注意:在选择卷时,只能启动一个实例。
卷快照:此选项使用卷快照来引导实例,并创建新卷来持久化实例数据。您可以选择在删除实例时删除卷。

  • want to要; <口>应该
  • ephemeral朝生暮死; 短暂的,瞬息的; 朝露; 一年生
  • instance data实例数据; 实例资料
  • one of其中之一
  • Snapshot快照物件; 照片,独立的印象,简单印象; 简介
  • persistent持续的; 持久的; 坚持不懈的; 坚持不渝
  • persist坚持; 存留; 固执; 继续存在
  • specify指定; 详述; 提出…的条件; 使具有特性; 明确提出,详细说明
  • deletion删除
  • a volume一部;一本

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转载自www.cnblogs.com/longchang/p/10063355.html