Configuring Glance with the Ceph backend

Glance can use the existing Ceph pools as a datastore to store virtual machine images. In this recipe, we will configure the Glance backend driver for the Ceph RADOS Block Device.

Getting ready

Before configuring Glance to use the Ceph RBD backend, we need to make sure that the Database, message broker, and Keystone are set for Glance, and both glance-api.conf and glance-registry.conf are configured correctly to use them. We also need to make sure that a Ceph volume with a corresponding pool for glance was created, and the ceph.conf and key.ring files were preconfigured.

The CephFS Python package is also required to use the Ceph RBD backend driver:

[root@controller ~]# yum install -y python-cephfs

How to do it...

Follow these steps to configure Glance with the Ceph storage backend:

1. Using the openstack-config command, edit the glance-api configuration file, and under the default section, set default_store to rdb:

   [root@controller ~]# openstack-config ...