OpenStack 影像服务（代号Glance）提供发现，登记，并提供虚拟磁盘映像的服务。映像服务API服务器提供了一个标准的查询，包括OpenStack里的对象存储在各种后端存储的虚拟磁盘存储的图像信息的REST接口。图像服务，公开可用的磁盘映像的信息查询，客户可以注册新的虚拟磁盘映像，并使用虚拟磁盘映像串流映像服务的客户端库。-OpenStack Image Service (code-named Glance) provides discovery, registration, and delivery services for virtual disk images. The Image Service API server provides a standard REST interface for querying information about virtual disk images stored in a variety of back-end stores, including OpenStack Object Storage. Clients can register new virtual disk images with the Image Service, query for information on publicly available disk images, and use the Image Service s client library for streaming virtual disk images.



A multi-format image registry, OpenStack Image Service allows uploads of private and public images in a variety of formats, including:



Raw

Machine (kernel/ramdisk outside of image, a.k.a. AMI)

VHD (Hyper-V)

VDI (VirtualBox)

qcow2 (Qemu/KVM)

VMDK (VMWare)

OVF (VMWare, others)