openstack-ansible/doc/source/install-guide/configure-glance.rst

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Configuring the Image service

In an all-in-one deployment with a single infrastructure node, the Image service uses the local file system on the target host to store images. When deploying production clouds we recommend backing Glance with a swift backend or some form or another of shared storage.

The following procedure describes how to modify the /etc/openstack_deploy/user_variables.yml file to enable Cloud Files usage.

1. Change the default store to use Object Storage (swift), the underlying architecture of Cloud Files:

   glance_default_store: swift

2. Set the appropriate authentication URL:

   glance_swift_store_auth_address: https://127.0.0.1/v2.0

3. Set the swift account credentials:

   # Replace this capitalized variables with actual data.
   glance_swift_store_user: GLANCE_SWIFT_TENANT:GLANCE_SWIFT_USER
   glance_swift_store_key: SWIFT_PASSWORD_OR_KEY

4. Change the ``glance_swift_store_endpoint_type`` from the default ``internalURL`` settings to ``publicURL`` if needed.

   glance_swift_store_endpoint_type: publicURL

5. Define the store name:

   glance_swift_store_container: STORE_NAME

   Replace ``STORE_NAME`` with the container name in swift to be used for storing images. If the container doesn't exist, it will be automatically created.

6. Define the store region:

   glance_swift_store_region: STORE_REGION

   Replace ``STORE_REGION`` if needed.

7. (Optional) Set the paste deploy flavor:

   glance_flavor: GLANCE_FLAVOR

   By default, the Image service uses caching and authenticates with the Identity service. The default maximum size of the image cache is 10 GB. The default Image service container size is 12 GB. In some configurations, the Image service might attempt to cache an image which exceeds the available disk space. If necessary, you can disable caching. For example, to use Identity without caching, replace ``GLANCE_FLAVOR`` with keystone:

   glance_flavor: keystone

   Or, to disable both authentication and caching, set ``GLANCE_FLAVOR`` to no value:

   glance_flavor: 

   This option is set by default to use authentication and cache management in the playbooks/roles/os_glance/defaults/main.yml file. To override the default behavior, set glance_flavor to a different value in /etc/openstack_deploy/user_variables.yml.

   The possible values for ``GLANCE_FLAVOR`` are:

   • (Nothing)
   • caching
   • cachemanagement
   • keystone
   • keystone+caching
   • keystone+cachemanagement (default)
   • trusted-auth
   • trusted-auth+cachemanagement

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