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Learning OpenStack by Sunil Sarat, Alok Shrivastwa

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Working with Glance

As mentioned earlier, Glance is a mandatory service, and without this service, Nova (compute service) will not know where to pick its images from. We will install Glance on the controller node itself. The following diagram explains its architecture:

Working with Glance

Glance has two components: glance-api and glance-registry. As the name suggests, glance-api provides the API calls required to retrieve and store the images, while glance-registry handles more of the backend functions regarding where the images are stored.

Let's start with the installation of Glance. Its installation follows similar steps to those used for Keystone in the previous chapter. ...

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