openstack 中镜像状态详解 Image Statuses

Images in Glance can be in one the following statuses:

• queued

  The image identifier has been reserved for an image in the Glance registry. No image data has been uploaded to Glance and the image size was not explicitly set to zero on creation.

• saving

  Denotes that an image’s raw data is currently being uploaded to Glance. When an image is registered with a call to POST /images and there is an x-image-meta-location header present, that image will never be in the saving status (as the image data is already available in some other location).

• active

  Denotes an image that is fully available in Glance. This occurs when the image data is uploaded, or the image size is explicitly set to zero on creation.

• killed

  Denotes that an error occurred during the uploading of an image’s data, and that the image is not readable.

• deleted

  Glance has retained the information about the image, but it is no longer available to use. An image in this state will be removed automatically at a later date.

• pending_delete

  This is similiar to deleted, however, Glance has not yet removed the image data. An image in this state is recoverable.

This is a representation of how the image move from one status to the next.

• Add location from zero to more than one.
• Remove location from one or more to zero by PATCH method which is only supported in v2.