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52 lines
1.5 KiB
ReStructuredText
52 lines
1.5 KiB
ReStructuredText
==========================
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iSCSI Gateway Requirements
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==========================
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It is recommended to provision two to four iSCSI gateway nodes to
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realize a highly available Ceph iSCSI gateway solution.
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For hardware recommendations, see :ref:`hardware-recommendations` .
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.. note::
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On iSCSI gateway nodes the memory footprint is a function of
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of the RBD images mapped and can grow to be large. Plan memory
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requirements accordingly based on the number RBD images to be mapped.
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There are no specific iSCSI gateway options for the Ceph Monitors or
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OSDs, but it is important to lower the default heartbeat interval for
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detecting down OSDs to reduce the possibility of initiator timeouts.
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The following configuration options are suggested::
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[osd]
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osd heartbeat grace = 20
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osd heartbeat interval = 5
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- Updating Running State From a Ceph Monitor Node
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::
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ceph tell <daemon_type>.<id> config set <parameter_name> <new_value>
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::
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ceph tell osd.* config set osd_heartbeat_grace 20
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ceph tell osd.* config set osd_heartbeat_interval 5
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- Updating Running State On Each OSD Node
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::
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ceph daemon <daemon_type>.<id> config set osd_client_watch_timeout 15
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::
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ceph daemon osd.0 config set osd_heartbeat_grace 20
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ceph daemon osd.0 config set osd_heartbeat_interval 5
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For more details on setting Ceph's configuration options, see
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:ref:`configuring-ceph`. Be sure to persist these settings in
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``/etc/ceph.conf`` or, on Mimic and later releases, in the
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centralized config store.
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