8294fd913e
The admonition is not a note but a warning since it provides security advice Made the wording more warning-like Change-Id: I6a03fa2db3e9702cba6efc73fb06d514fc5ec082 Closes-Bug: #1503920
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OpenStack Image service
The OpenStack Image service is central to Infrastructure-as-a-Service
(IaaS) as shown in get_started_conceptual_architecture. It accepts API
requests for disk or server images, and image metadata from end users or
OpenStack Compute components. It also supports the storage of disk or
server images on various repository types, including OpenStack Object
Storage.
A number of periodic processes run on the OpenStack Image service to support caching. Replication services ensure consistency and availability through the cluster. Other periodic processes include auditors, updaters, and reapers.
The OpenStack Image service includes the following components:
- glance-api
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Accepts Image API calls for image discovery, retrieval, and storage.
- glance-registry
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Stores, processes, and retrieves metadata about images. Metadata includes items such as size and type.
Warning
The registry is a private internal service meant for use by OpenStack Image service. Do not expose this service to users.
- Database
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Stores image metadata and you can choose your database depending on your preference. Most deployments use MySQL or SQLite.
- Storage repository for image files
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Various repository types are supported including normal file systems, Object Storage, RADOS block devices, HTTP, and Amazon S3. Note that some repositories will only support read-only usage.