Key Concepts


A virtual machine image is a single file which contains a virtual disk that has a bootable operating system installed on it. Virtual machine images come in different formats, such as raw and qcow2.


An image store is where the virtual machine images managed by Glance reside on a persistent medium. While Glance currently has support for many different stores, the most commonly deployed stores are file and swift.


This store refers to a directory on a local file system where the glance-registry service is running. The directory could refer to:

This store refers to an instance of the OpenStack Object Storage service (Swift).

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