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51 lines
2.6 KiB
ReStructuredText
51 lines
2.6 KiB
ReStructuredText
==================
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Ceph iSCSI Gateway
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==================
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The iSCSI gateway is integrating Ceph Storage with the iSCSI standard to provide
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a Highly Available (HA) iSCSI target that exports RADOS Block Device (RBD) images
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as SCSI disks. The iSCSI protocol allows clients (initiators) to send SCSI commands
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to SCSI storage devices (targets) over a TCP/IP network. This allows for heterogeneous
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clients, such as Microsoft Windows, to access the Ceph Storage cluster.
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Each iSCSI gateway runs the Linux IO target kernel subsystem (LIO) to provide the
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iSCSI protocol support. LIO utilizes a userspace passthrough (TCMU) to interact
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with Ceph's librbd library and expose RBD images to iSCSI clients. With Ceph’s
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iSCSI gateway you can effectively run a fully integrated block-storage
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infrastructure with all the features and benefits of a conventional Storage Area
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Network (SAN).
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.. ditaa::
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Cluster Network
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+-------------------------------------------+
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| | | |
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+-------+ +-------+ +-------+ +-------+
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| | | | | | | |
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| OSD 1 | | OSD 2 | | OSD 3 | | OSD N |
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| {s}| | {s}| | {s}| | {s}|
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+-------+ +-------+ +-------+ +-------+
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| | | |
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+--------->| | +---------+ | |<---------+
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: | | | RBD | | | :
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| +----------------| Image |----------------+ |
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| Public Network | {d} | |
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| +---------+ |
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| |
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| +-------------------+ |
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| +--------------+ | iSCSI Initiators | +--------------+ |
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| | iSCSI GW | | +-----------+ | | iSCSI GW | |
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+-->| RBD Module |<--+ | Various | +-->| RBD Module |<--+
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| | | | Operating | | | |
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+--------------+ | | Systems | | +--------------+
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| +-----------+ |
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+-------------------+
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.. toctree::
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:maxdepth: 1
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Requirements <iscsi-requirements>
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Configuring the iSCSI Target <iscsi-targets>
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Configuring the iSCSI Initiators <iscsi-initiators>
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Monitoring the iSCSI Gateways <iscsi-monitoring>
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