37 lines
1.4 KiB
ReStructuredText
37 lines
1.4 KiB
ReStructuredText
=======================
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OpenStack Block Storage
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=======================
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The OpenStack Block Storage service (cinder) adds persistent storage
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to a virtual machine. Block Storage provides an infrastructure for managing
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volumes, and interacts with OpenStack Compute to provide volumes for
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instances. The service also enables management of volume snapshots, and
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volume types.
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The Block Storage service consists of the following components:
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cinder-api
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Accepts API requests, and routes them to the ``cinder-volume`` for
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action.
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cinder-volume
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Interacts directly with the Block Storage service, and processes
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such as the ``cinder-scheduler``. It also interacts with these processes
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through a message queue. The ``cinder-volume`` service responds to read
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and write requests sent to the Block Storage service to maintain
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state. It can interact with a variety of storage providers through a
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driver architecture.
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cinder-scheduler daemon
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Selects the optimal storage provider node on which to create the
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volume. A similar component to the ``nova-scheduler``.
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cinder-backup daemon
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The ``cinder-backup`` service provides backing up volumes of any type to
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a backup storage provider. Like the ``cinder-volume`` service, it can
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interact with a variety of storage providers through a driver
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architecture.
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Messaging queue
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Routes information between the Block Storage processes.
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