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54 lines
2.6 KiB
ReStructuredText
54 lines
2.6 KiB
ReStructuredText
.. _ceph-iscsi:
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==================
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Ceph iSCSI Gateway
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==================
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The iSCSI Gateway presents
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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 storage devices (targets) over a TCP/IP network, enabling clients without
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native Ceph client support to access Ceph block storage. These include
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Microsoft Windows and even BIOS.
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Each iSCSI gateway exploits the Linux IO target kernel subsystem (LIO) to provide
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iSCSI protocol support. LIO utilizes 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 provision 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 (optional)
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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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