07 - Install and configure Glance

At first glance, Glance may seem simple: it stores, manages, and serves images to the compute service (Nova). In this post I install and configure Glance on the controller01 node, explain key components, and leave a minimal flow to upload a test image. Glance architecture Components you’ll see during installation: Glance API: exposes the REST API to store, list, and retrieve images. Glance Store: manages backends where image files are stored (file, Swift, Ceph, …). Metadata / registry service: stores image metadata (in many deployments this functionality is integrated into the API and DB). Glance uses an SQL database for state; here we use MySQL/MariaDB on the controller. In this guide we use the file backend for simplicity.