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78 lines
2.8 KiB
ReStructuredText
78 lines
2.8 KiB
ReStructuredText
=================
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Getting Started
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=================
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Whether you want to provide :term:`Ceph Object Storage` and/or :term:`Ceph Block
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Device` services to :term:`Cloud Platforms`, deploy a :term:`Ceph Filesystem` or
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use Ceph for another purpose, all :term:`Ceph Storage Cluster` deployments begin
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with setting up each :term:`Ceph Node`, your network and the Ceph Storage
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Cluster. A Ceph Storage Cluster has three essential daemons:
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.. ditaa:: +---------------+ +---------------+ +---------------+
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| OSDs | | Monitor | | MDS |
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+---------------+ +---------------+ +---------------+
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- **OSDs**: A :term:`Ceph OSD Daemon` (OSD) stores data, handles data
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replication, recovery, backfilling, rebalancing, and provides some monitoring
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information to Ceph Monitors by checking other Ceph OSD Daemons for a
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heartbeat. A Ceph Storage Cluster requires at least two Ceph OSD Daemons to
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achieve an ``active + clean`` state.
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- **Monitors**: A :term:`Ceph Monitor` maintains maps of the cluster state,
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including the monitor map, the OSD map, the Placement Group (PG) map, and the
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CRUSH map. Ceph maintains a history (called an "epoch") of each state change
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in the Ceph Monitors, Ceph OSD Daemons, and PGs.
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- **MDSs**: A :term:`Ceph Metadata Server` (MDS) stores metadata on behalf of
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the :term:`Ceph Filesystem` (i.e., Ceph Block Devices and Ceph Object Storage
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do not use MDS). Ceph Metadata Servers make it feasible for POSIX file system
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users to execute basic commands like ``ls``, ``find``, etc. without placing
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an enormous burden on the Ceph Storage Cluster.
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.. raw:: html
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<style type="text/css">div.body h3{margin:5px 0px 0px 0px;}</style>
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<table cellpadding="10"><colgroup><col width="33%"><col width="33%"><col width="33%"></colgroup><tbody valign="top"><tr><td><h3>Step 1: Preflight</h3>
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A :term:`Ceph Client` and a :term:`Ceph Node` may require some basic
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configuration work prior to deploying a Ceph Storage Cluster. You can also
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avail yourself of help from the Ceph community by getting involved.
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.. toctree::
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Get Involved <get-involved>
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Preflight <quick-start-preflight>
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.. raw:: html
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</td><td><h3>Step 2: Storage Cluster</h3>
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Once you've completed your preflight checklist, you should be able to begin
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deploying a Ceph Storage Cluster.
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.. toctree::
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Storage Cluster Quick Start <quick-ceph-deploy>
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.. raw:: html
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</td><td><h3>Step 3: Ceph Client(s)</h3>
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Most Ceph users don't store objects directly in the Ceph Storage Cluster. They typically use at least one of
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Ceph Block Devices, the Ceph Filesystem, and Ceph Object Storage.
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.. toctree::
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Block Device Quick Start <quick-rbd>
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Filesystem Quick Start <quick-cephfs>
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Object Storage Quick Start <quick-rgw>
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.. raw:: html
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</td></tr></tbody></table>
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