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
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OpenStack Image Service
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-----------------------
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The OpenStack Image Service is central to Infrastructure-as-a-Service
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(IaaS) as shown in Conceptual architecture. It accepts API requests for disk
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or server images, and image metadata from end users or OpenStack Compute
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components. It also supports the storage of disk or server images on various
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repository types, including OpenStack Object Storage.
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.. TODO (DC) On line 7, add link to get_started_conceptual_architecture.rst
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A number of periodic processes run on the OpenStack Image Service to
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support caching. Replication services ensure consistency and
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availability through the cluster. Other periodic processes include
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auditors, updaters, and reapers.
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The OpenStack Image Service includes the following components:
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glance-api
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Accepts Image API calls for image discovery, retrieval, and storage.
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glance-registry
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Stores, processes, and retrieves metadata about images. Metadata
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includes items such as size and type.
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.. note::
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The registry is a private internal service meant for use by
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OpenStack Image Service. Do not disclose it to users.
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Database
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Stores image metadata and you can choose your database depending on
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your preference. Most deployments use MySQL or SQLite.
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Storage repository for image files
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Various repository types are supported including normal file
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systems, Object Storage, RADOS block devices, HTTP, and Amazon S3.
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Note that some repositories will only support read-only usage.
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