forked from rook/rook
Sébastien Han
91b76cc24c
Since we re-organized the design directory we need to update the links in various files. Signed-off-by: Sébastien Han <seb@redhat.com>
48 lines
2.0 KiB
Markdown
48 lines
2.0 KiB
Markdown
# Rook Data Model
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```
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# Operator
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The operator manages multiple Rook storage clusters
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The operator manages all CRDs for the Rook clusters
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One instance of the operator is active
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Multiple instances of the operator can be on standby in an HA configuration
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# Storage Cluster
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The cluster CRD defines desired settings for a storage cluster
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All resources for a Rook cluster are created in the same Kubernetes namespace
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A cluster has an odd number of mons that form quorum
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A cluster has an osd per storage device
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A cluster has zero or more pools
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A cluster has zero or more block devices
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A cluster has zero or more object stores
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A cluster has zero or more shared file services
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# Pool
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The pool CRD defines desired settings for a pool
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A pool is created with either replication or erasure coding
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Replication can be 1 or more
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Erasure coding requires k >= 2 and m >= 1, where k is data chunks and m is coding chunks
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Erasure coding specifies a plugin (default=jerasure)
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Erasure coding specifies an encoding algorithm (default=reed_sol_van)
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A pool can set its failure domain using a CRUSH rule (default=host)
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# Object Store
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The object store CRD defines desired settings for an object store
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An object store has a set of pools dedicated to its instance
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Object store metadata pools can specify the same set of pool settings
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The object store data pool can specify all pool settings
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An object store has a unique set of authorized users
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An object store has one or more stateless RGW pods for load balancing
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An object store can specify an SSL certificate for secure connections
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An object store can specify a port for RGW services (default=53390)
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An object store represents a Ceph zone
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An object store can be configured for replication from an object store in the same cluster or another cluster
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# Shared File System
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The file system CRD defines desired settings for a file system
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A file system has one MDS service if not partitioned
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A file system has multiple MDS services if partitioned
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A file system has one metadata pool
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A file system has one data pool
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```
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