c6036a4c8e
Files converted: - common/ch_getstart.xml - common/section_getstart_compute.xml - common/section_storage-concepts.xml - common/section_getstart_object-storage.xml - common/section_getstart_block-storage.xml - common/section_getstart_networking.xml - common/section_getstart_dashboard.xml - common/section_keystone-concepts.xml - common/section_getstart_image.xml - common/section_getstart_telemetry.xml - common/section_getstart_orchestration.xml - common/section_getstart_trove.xml - common/section_getstart_sahara.xml - common/section_getstart_conceptual_arch.xml - common/section_getstart_logical_arch.xml Change-Id: I41318a887af6855f3a25e6adedbbd9e75f431332 Implements: blueprint reorganise-user-guides
1.5 KiB
OpenStack Image Service
The OpenStack Image Service is central to Infrastructure-as-a-Service (IaaS) as shown in 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
-
Accepts Image API calls for image discovery, retrieval, and storage.
- glance-registry
-
Stores, processes, and retrieves metadata about images. Metadata includes items such as size and type.
Note
The registry is a private internal service meant for use by OpenStack Image Service. Do not disclose it to users.
- Database
-
Stores image metadata and you can choose your database depending on your preference. Most deployments use MySQL or SQLite.
- Storage repository for image files
-
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.